How to Fill Out IRS Form 706 (w/Examples) + FAQs

IRS Form 706 is the United States Estate (and Generation-Skipping Transfer) Tax Return. It’s used by the executor of an estate to report all of a decedent’s assets, calculate the estate tax due (if any), and compute any generation-skipping transfer tax for inheritances skipping a generation. In simple terms, this form tells the IRS the total value of everything the decedent owned and what deductions or credits apply, so the IRS can determine if the estate owes federal estate tax.

Who needs to file Form 706? The executor (or personal representative) of an estate must file Form 706 for U.S. citizens or residents if the gross estate, plus any adjusted taxable gifts made during the decedent’s lifetime, exceeds the federal estate tax exemption for the year of death. For example, for deaths in 2024, this filing threshold is $13.61 million (and it was $12.92 million for 2023).

If the combined value of the estate and lifetime taxable gifts is above that amount, a federal estate tax return is required. Importantly, even if the estate’s value is below the exemption, the form still needs to be filed to elect portability of any unused exemption to a surviving spouse. In summary, estates above the exemption must file, and certain smaller estates may choose to file to preserve tax benefits for a spouse.

Key point: Form 706 is not filed annually with income taxes; it’s a one-time return due nine months after the decedent’s death (with a possible 6-month extension). The form is quite comprehensive and requires detailed asset valuations and documentation. We will break down its components and guide you through how to fill it out effectively, whether you’re dealing with a modest estate or a high-net-worth estate with complex assets.

Understanding Federal Estate Tax Laws and Exemptions

Before diving into Form 706, it helps to understand the fundamentals of federal estate tax law. The estate tax is a one-time tax on the right to transfer property at death. It applies to the total taxable estate of a decedent, but only above a certain estate tax exemption amount.

Estate Tax Exemption: Each U.S. person’s estate can shelter a large amount from federal estate tax. This is often called the estate tax exemption or unified credit amount. For deaths in 2025, the exemption is approximately $13 million per individual (indexed annually for inflation; it was $13.61 million in 2024). This means the first ~$13 million of an estate is effectively tax-free due to a corresponding tax credit (the unified credit) that offsets the tax. Married couples can double that amount with planning: each spouse has their own exemption, and with portability (discussed later), any unused exemption of the first spouse to die can transfer to the survivor.

Top Tax Rate: The federal estate tax is progressive, with a top rate of 40% on amounts above the exemption. In practice, large estates pay 40% on the portion that exceeds the exempt amount. (Lower brackets ranging from 18% upward apply to initial portions, but once the estate’s taxable value is high, the marginal rate is 40%.) Most taxable estates are substantial enough that the bulk is taxed at or near that top rate.

Unified Gift and Estate Tax System: The U.S. has a unified system for estate and gift taxes. The lifetime exemption mentioned above covers both large lifetime gifts and transfers at death. If the decedent made sizable taxable gifts while alive (gifts exceeding the annual exclusion or not otherwise exempt), those gifts will count against the estate tax exemption. This prevents individuals from avoiding estate tax by gifting away assets before death. Practically, it means that if someone used part of their exemption during life (via gift tax Form 709 filings), their remaining exemption at death is reduced. Form 706 takes this into account by adding adjusted taxable gifts to the estate’s value when computing tax. We’ll explain this overlap more later.

Marital Deduction: U.S. estate tax law provides an unlimited marital deduction for assets left to a surviving spouse who is a U.S. citizen. This means any property passing outright to a surviving spouse is deducted from the gross estate and not subject to estate tax upon the first spouse’s death. In other words, a married couple can delay estate tax until the second spouse dies. (If the surviving spouse is not a U.S. citizen, a special Qualified Domestic Trust (QDOT) is generally required to get a similar deduction—an important nuance if applicable.) The marital deduction is a cornerstone of estate tax planning and is reflected in Form 706 (on Schedule M for spousal bequests).

2026 Sunset Consideration: It’s worth noting that the current historically high exemption is set to sunset after 2025. Unless laws change, in 2026 the exemption will drop to around ~$6–7 million (basically halving the current amount, adjusted for inflation). This means many more estates might become taxable in the future. Executors of deaths in 2025 and beyond should be aware of these shifting laws, especially for planning and portability decisions. But for any given decedent, the relevant exemption is the one in effect for the year of death.

Summary of Filing Requirements: In general, file Form 706 if the decedent’s gross estate plus past taxable gifts exceeds the exemption, or if any estate tax is due, or if portability is to be elected. The IRS also requires it to compute GSTT for certain transfers to grandchildren (even if no estate tax due). If unsure, err on the side of filing, because failing to file when required can result in hefty penalties. Now, let’s break down each component of the form and how to fill it out.

Determining the Gross Estate (All-Inclusive Assets)

The gross estate is the starting point for Form 706. It includes all property interests the decedent owned at death, plus certain transfers or interests specified by law. Determining the gross estate means taking inventory of everything the decedent had: real estate, bank accounts, investments, business interests, personal property, and more. Even some assets not titled in the decedent’s name can be included (for example, certain trusts or life insurance policies, as we’ll discuss). Essentially, if the decedent had ownership, control, or a beneficial interest in an asset, it likely belongs in the gross estate.

Key steps to determine the gross estate:

• Identify all assets: Common assets include the primary residence and any other real estate, cash accounts, stocks and bonds, retirement accounts (IRA, 401k), life insurance policies, vehicles, boats, jewelry, artwork, business ownership (partnerships, LLCs, shares in a family company), and any other property or rights of value.
• Use Form 706 Schedules A–I for asset listing: Form 706 provides separate schedules to categorize assets. Schedules A through I are used to list different types of property in detail:
  • Schedule A – Real Estate (homes, land, rental properties)
  • Schedule B – Stocks and Bonds (investment portfolios, mutual funds, publicly traded securities)
  • Schedule C – Mortgages, Notes, and Cash (cash, checking/savings accounts, unpaid promissory notes owed to the decedent)
  • Schedule D – Life Insurance (policies on the decedent’s life owned by the decedent or with incidents of ownership)
  • Schedule E – Jointly Owned Property (property the decedent owned jointly with others, such as joint tenancy or survivorship accounts)
  • Schedule F – Other Miscellaneous Property (assets that don’t fit elsewhere: personal effects, furniture, collectibles, intellectual property, etc.)
  • Schedule G – Lifetime Transfers (certain transfers the decedent made before death that are pulled back into the estate, like property over which the decedent retained some control or gifts made within 3 years of death in special cases)
  • Schedule H – Powers of Appointment (property the decedent could control through a power of appointment, even if not outright owned)
  • Schedule I – Annuities (annuities and retirement plan benefits that continue after death or had certain payout arrangements)
  The executor will list each asset on the appropriate schedule with its date-of-death value. Every schedule then feeds into the total gross estate value on page 3 of Form 706.
• Date-of-Death Valuation: By default, assets are valued as of the date of death at their fair market value (FMV). Fair market value means the price at which the property would change hands between a willing buyer and seller, with neither under compulsion and both with reasonable knowledge of the facts. For bank accounts or publicly traded stocks, this is straightforward (account balance or market closing price on date of death). For harder-to-value assets (real estate, closely-held business interests, artwork, jewelry), an appraisal by a qualified professional is typically required. Accurate valuation is crucial; undervaluing assets can lead to IRS penalties and overvaluing could mean overpaying tax. Executors should document values carefully — obtaining written appraisals for real estate, business interests, or valuable collectibles is highly recommended and often required for high-value items.
• Alternate Valuation Date (AVD) Option: The tax law provides an option to value all assets as of 6 months after the date of death (the “alternate valuation date”) instead of the date of death, if doing so both lowers the overall gross estate and the total estate tax due. This election, if used, must apply to all assets (except those distributed or sold within the first 6 months, which are valued as of distribution date). The executor can choose this Alternate Valuation by checking the appropriate box on Form 706 (Part 3) and writing “YES” on the election line. The AVD is beneficial if, for example, the estate’s investments or property values dropped significantly in the months after death – it could reduce the estate tax bill. However, it’s not advantageous if asset values rose or if there’s no estate tax to save (it’s not used just for simplicity; it’s specifically to reduce tax). If elected, you’ll need to provide both date-of-death and alternate values on the schedules. Executors should weigh this option carefully and document the rationale if they choose it.
• Includible Assets and Special Cases: Some assets might surprise you in how they’re included:
  • Life Insurance: Life insurance proceeds are included in the gross estate if the decedent owned the policy or had “incidents of ownership” (like the ability to change beneficiaries) at death. For example, a $1 million life insurance payout to the decedent’s children is part of the estate if the policy was owned by the decedent. However, if the policy was owned by an irrevocable life insurance trust (ILIT) or someone else, and the decedent had no control, the proceeds might not be included. This is a common estate planning strategy to keep insurance out of the estate.
  • Joint Accounts and Property: For property jointly owned with a spouse as joint tenants or tenants by entirety, the general rule is one-half of the value is included (because the surviving spouse already owns the other half). For jointly owned assets with someone other than a spouse, potentially the full value might be included except to the extent the other joint owner contributed to its acquisition. Form 706 Schedule E requires details on joint property and the contributions made by other owners to determine the includible amount.
  • Retirement Accounts: IRAs, 401(k)s, and other retirement accounts are usually 100% includible at their date-of-death market value (even though the beneficiary might later pay income tax on distributions, the gross estate includes the full value).
  • Trust Assets: If the decedent had placed assets in a revocable trust (living trust) or any trust where they retained control or benefit, those assets are typically included in the gross estate (often via Schedule G). The trust’s existence doesn’t avoid estate tax if the decedent kept strings attached. Only irrevocable trusts where the decedent had no retained interest (and not within 3 years of death for certain transfers) might be excluded.
  • Gifts made shortly before death: Generally, if the decedent made a taxable gift (over the annual exclusion) within 3 years of death, that gift itself is not pulled back into the estate (the value stays out, except for some special things like life insurance transfers or if gift tax was paid). However, any gift tax paid on such gifts within 3 years does get included in the estate (a technical rule to prevent deathbed gifting from avoiding tax by paying gift tax instead of estate tax).

In filling out Schedules A–I, list each asset or property interest, its description, and its fair market value. Use additional sheets if necessary for detailed listings. Every total from Schedules A through I will be summed up to arrive at the total gross estate value. Accuracy here is fundamental – this forms the basis for the rest of the tax calculation.

Example (Gross Estate in a Large Estate): John, a decedent with a $50 million estate, had extensive assets: multiple real estate holdings (Schedule A), a large stock portfolio (Schedule B), significant cash and promissory notes (Schedule C), and a $5 million life insurance policy he owned (Schedule D). He also had a family business valued at $15 million (Schedule F, if not publicly traded). Each asset needed a date-of-death appraisal or valuation: commercial real estate appraisals, a business valuation by an expert, etc. John’s executor carefully itemized these on the schedules, documenting each value.

The gross estate summed to $50M. In contrast, a smaller estate might have a simpler asset profile: for instance, Jane’s estate was about $3 million consisting of a house, a bank account, and an IRA. Her assets were easier to value (real estate appraisal for the house, statements for the bank and IRA). Jane’s gross estate totaled $3M, well below the federal exemption – but as we’ll see, her executor still opted to file Form 706 for portability of her unused exemption.

Deductions That Reduce the Gross Estate

Once the gross estate is tallied, Form 706 allows several deductions that can substantially reduce the estate’s taxable value. Deductions are the estate tax equivalent of business expenses or personal deductions – they recognize that not all of the gross estate is subject to tax due to debts, costs, or favorable provisions like spousal and charitable transfers. After subtracting allowable deductions from the gross estate, the remainder is the taxable estate.

Major categories of deductions on Form 706 include:

• Funeral and Administrative Expenses: Costs directly related to the decedent’s funeral, burial, and the estate’s administration can be deducted (on Schedule J). This includes funeral expenses, burial plot cost, tombstone, etc., as well as estate administration costs like executor’s fees, attorney and accountant fees, probate court costs, and appraisal fees for estate assets. These expenses must be actual, out-of-pocket costs paid by the estate. (Note: The estate can choose to deduct some of these on the estate’s income tax return Form 1041 instead, but you can’t deduct the same expense twice. Executors often choose whichever deduction yields the greater tax benefit.)
• Debts, Mortgages, and Liabilities: Any legitimate debts the decedent owed at death reduce the taxable estate (reported on Schedule K). This includes mortgages on real property, credit card balances, medical bills, personal loans, and other claims against the estate. For mortgages or liens on estate property, the full value of the asset is included in the gross estate on the asset schedule, and the outstanding mortgage is deducted on Schedule K. Be sure to only include debts that were enforceable and outstanding as of the date of death.
• Losses During Administration: If any estate assets incur losses during the administration (for example, if property is damaged or destroyed, or market value drops before sale), certain losses can be deducted on Schedule L. Also, expenses incurred in administering property not subject to claims (like trust property included in the estate) can be listed here. These are more specialized deductions and often not applicable unless something unfortunate happens post-death or the estate has segregated assets.
• Marital Deduction (Schedule M): As mentioned earlier, any assets going to a surviving spouse (who is a U.S. citizen) qualify for a 100% estate tax marital deduction. This is claimed on Schedule M. Essentially, list each bequest, asset, or trust passing to the spouse and deduct its value. There is no dollar limit to the marital deduction – an entire estate can pass to a spouse tax-free. However, the trade-off is that those assets will be part of the spouse’s estate later. It’s important to ensure the transfer meets the requirements (it generally must be an interest that passes outright or in a qualifying manner to the spouse, not a contingent or terminable interest unless in a QTIP trust elected or a QDOT for non-citizen spouse). If the surviving spouse is not a U.S. citizen, a Qualified Domestic Trust (QDOT) must be used to get a marital deduction – otherwise, transfers to a non-citizen spouse do not qualify for the unlimited deduction. Form 706 has a special place in Schedule M and Part 4 to make a QDOT election if needed for a non-citizen spouse.
• Charitable Deduction (Schedule O): Property left to charitable organizations (IRS-recognized charities, nonprofits, religious institutions, etc.) is deductible from the estate on Schedule O. There is no limit on this deduction either – an estate left entirely to charity would pay zero estate tax. To claim it, list each charitable bequest or asset passing to charity and its value. The transfer must be to a qualified charity and meet any conditions in the tax code. Both outright gifts and charitable trusts (like a charitable remainder trust) can qualify. Proper documentation (like the will or trust showing the charitable bequest) should be kept in case of IRS review.
• State Death Taxes: If the estate paid any state estate taxes or inheritance taxes, those amounts are deductible on the federal return (Schedule P in older terms, but currently the deduction for state estate tax is taken on Part 2 of the form, line 3b). In the past, state taxes generated a federal credit; now they are a deduction. We’ll discuss state taxes more in the state section, but note here that any tax paid to a state for death-related taxes reduces the federal taxable estate.
• Other Deductions: There are a few other credits/deductions such as foreign death taxes (Schedule P) if property in another country was taxed by that country, or tax on prior transfers (Schedule Q) if the decedent had inherited something recently that was taxed in another estate – these give a credit so the same assets aren’t double-taxed in short succession. These are niche but important in certain cases.

When filling Form 706, you will total up all these deductions and subtract them from the gross estate to arrive at the Taxable Estate. The form’s Part 5 (Recapitulation) essentially does: Gross Estate (line 1) minus total deductions (line 2) = Taxable Estate (line 3). A key tip is to ensure proper documentation for every deduction: keep receipts for funeral costs, invoices for attorney fees, statements of debts, etc. Also, make sure expenses are not missed – many estates have significant administration costs that provide valuable deductions.

Example (Deductions in Action): Continuing with John’s $50M gross estate, let’s say $20M was left outright to his wife and $5M to various charities. Additionally, John had a mortgage of $2M on a property and $300K in other debts and final medical bills, plus $200K of funeral and administration costs. The executor would:

• Deduct the $20M marital bequest on Schedule M.
• Deduct the $5M in charitable gifts on Schedule O.
• Deduct the $2.3M of debt and expenses on Schedules K and J.
  These deductions total $27.3M. Subtracting that from the $50M gross estate yields a $22.7M taxable estate. In contrast, Jane’s smaller $3M estate might have had $50K of debts and expenses and perhaps she left $1M to her husband. That would deduct $1.05M, leaving her taxable estate around $1.95M – which is still below the exemption, meaning no tax due. But Jane’s executor files Form 706 to capture the unused exemption (more on that in portability).

From Gross Estate to Taxable Estate: The Tax Calculation Overview

After listing assets and deductions, the executor needs to calculate whether any estate tax is owed. Here’s the big picture of how the tax is figured on Form 706:

1. Taxable Estate: This is the gross estate minus all the deductions we just discussed. This figure represents the net amount that is subject to estate tax before considering any lifetime gifts. For many estates, if this number is below the exemption, no tax will ultimately be due (though the form may still be filed for other reasons). If it’s above the exemption, the excess is potentially taxable.
2. Adjusted Taxable Gifts: The next step is to account for lifetime gifts the decedent made that were taxable. On Form 706, the term “adjusted taxable gifts” refers to the total value of taxable gifts made after 1976 (the year the gift tax and estate tax were unified) that were not already included in the gross estate. In simpler terms, it’s the sum of all gifts over the annual exclusion (and other exclusions) that the decedent gave away during life (usually as reported on Form 709 gift tax returns each year). These gifts are added to the taxable estate to form what’s called the estate tax base.
   • Why add gifts? Because the estate tax is calculated as if the person’s taxable transfers during life and at death were one single event. This ensures the tax rate applied reflects the total transferred wealth, and it ensures the unified credit is properly applied against the combined amount. It prevents someone from giving away $5 million one year (using exemption) and another $5 million at death (using exemption again) beyond the single exemption amount.
   • Practically, the executor must gather records of the decedent’s lifetime gifts. If the decedent ever filed Form 709 (United States Gift Tax Return), those returns will show taxable gifts and how much exemption was used. Common examples of adjusted taxable gifts would be large cash gifts to children, transfers of property to others for less than full value, or forgiving a loan as a gift. Gifts within the annual exclusion (e.g. $15,000 or $16,000 per person per year, depending on the year) are not taxable gifts and wouldn’t be in this total. Also, gifts to spouses (if U.S. citizen) and direct payment of tuition or medical expenses for someone (paid to institution) are tax-free and not counted. Only gifts that consumed part of the lifetime exemption or incurred gift tax are counted here.
   • The total adjusted taxable gifts are entered on Form 706 (Part 2 of the form) and added to the taxable estate. For example, if John had given $5 million to his children during his lifetime (above annual exclusions) and reported those, that $5M gets added to his $22.7M taxable estate, making a $27.7M combined base for tax calculation.
3. Compute Tentative Estate Tax: The IRS provides a tax rate schedule to compute the tax on the combined amount (taxable estate + adjusted gifts). Form 706’s “Tax Computation” section guides you through it. Essentially, you calculate the tax as if that total was all transferred at death. The tax rates are graduated, but for large estates, most of it will be taxed at 40%. (The schedule starts at 18% for the first $10,000, then 20%, 22%, …, up to 40% for amounts over $1 million. Given the multi-million-dollar exemptions today, almost any taxable estate will max out the bracket, but the form’s worksheet handles it.) Let’s say our combined tax base is $27.7M. The tax on that might be roughly $10.8 million (because 40% of $27.7M is $11.08M, minus some lower-bracket adjustments). The form has you calculate the exact figure.
4. Subtract Gift Tax Already Paid or Credit Used: Now, crucially, we subtract two things from that tentative tax:
   • Gift Taxes Paid: If the decedent actually paid any out-of-pocket gift tax on gifts (uncommon nowadays, since most use exemption), that amount is credited. Usually, people don’t pay gift tax unless they gave more than their lifetime exemption while alive, which is rare. But the form allows credit for any gift tax paid to prevent double taxation.
   • Unified Credit (Applicable Credit Amount): This is the big one – the credit equivalent of the estate tax exemption. For 2024, the unified credit is about $5,113,800, which is the tax on a $13.61M estate. This credit directly reduces the tax. Every estate gets to use this credit (unless it was already fully used by lifetime gifts). If the decedent used some exemption during life, they have correspondingly less credit remaining at death because part of it was effectively used to offset gift tax. The Form 706 will ask for the amount of exemption used for gifts (from prior gift tax returns) to determine how much credit is left.
   • Additionally, if the decedent is claiming portability (using a predeceased spouse’s unused exemption), that DSUE amount will provide an extra credit (we’ll discuss that in the portability section).
   After subtracting the unified credit and any other credits (like those for foreign tax or prior transfers, if any), the result is the net estate tax due. It’s possible this calculation brings the tax to zero, especially if the taxable estate is under or just at the exemption. If the taxable estate + gifts is below the exemption threshold, the unified credit will wipe out the entire tentative tax.
5. GST Tax computation: If applicable, the form has separate sections (Schedules R and R-1 and Part 2, line 17) for Generation-Skipping Transfer Tax on certain transfers to “skip persons” (grandchildren or later generations). The GST tax has its own equal exemption (often the same dollar amount as the estate exemption) and a 40% rate. We’ll cover GSTT in more detail later, but know that GST tax is calculated separately from the estate tax, though on the same Form 706 if there are direct skips at death.

In summary, the core estate tax equation is:

Taxable Estate 
+ Adjusted Taxable Gifts 
= Estate Tax Base
× Tax Rate (graduated to 40%)
= Tentative Tax
− [Unified Credit + other credits] 
= Estate Tax Owed

The unified credit is what uses up that exemption amount. On the form, you’ll fill in the exemption used so that any tax on the exempt amount is offset. The net result after the credit is the tax the estate must pay. If the credits exceed the tentative tax, then no tax is due (but you still file the return if required by size or for portability).

Gift Tax Overlap Example: John’s lifetime taxable gifts of $5M used part of his exemption. On his Form 706, suppose the tax on the $27.7M base was $11 million tentative. His unified credit covers the tax on $12.92M (2023 exemption) – roughly a $5.1M credit. But because he used $5M of exemption on gifts, he only had about $7.92M exemption left at death. That means his remaining credit might be around $3.1M.

So after subtracting that, about $7.9M of his estate is taxable at 40%, resulting in roughly $3.16M estate tax due. (These numbers are illustrative.) If John hadn’t made those lifetime gifts, more of the exemption would be available and the estate tax would be lower. Jane, on the other hand, had no taxable gifts and a taxable estate under the exemption; her tentative tax was fully covered by the unified credit, leaving zero estate tax owed.

The interplay between gift and estate taxes highlights why executors must gather the decedent’s gift history. Failing to account for lifetime gifts could cause miscalculation of the tax or even penalties. Always include any Form 709 gift tax returns filed by the decedent as part of your documentation when preparing Form 706.

Portability: Transferring Unused Exemption to a Surviving Spouse

One of the most important provisions for married couples in estate tax law is portability. Portability allows a surviving spouse to inherit any unused estate tax exemption from their deceased spouse, effectively doubling the amount they can pass tax-free. However, this benefit is not automatic – it requires filing Form 706 for the first spouse to die and making the portability election on that return.

Here’s how portability works and how to elect it:

• DSUE Amount: The unused portion of the deceased spouse’s exemption is called the Deceased Spousal Unused Exclusion (DSUE) amount. For example, if a husband dies in 2025 with a $5 million estate, he would have used $5M of his ~$13M exemption, leaving roughly $8M unused. If Form 706 is filed and portability elected, that $8M DSUE can be transferred to his wife. The wife’s own exemption is then effectively her $13M (for her year of death) plus the $8M DSUE, totaling ~$21M she could potentially pass tax-free.
• Making the Election: To elect portability, the executor must timely file a complete Form 706 and check the box (or otherwise indicate) that they are electing to transfer the unused exemption to the surviving spouse. On the 706, there’s a specific section (Part 6 – Portability of Deceased Spousal Unused Exclusion) to fill in the DSUE amount that’s being ported. Even if the estate is under the filing threshold, you file the return solely to elect portability. The return can be a simplified version if below threshold (you may not need to appraise every tiny asset – the IRS accepts a simplified reporting for estates under the threshold with only portability election purpose, where you can just say “estate is under threshold, values approximate” except for certain assets passing to spouse). But it’s safest to provide as much detail as possible.
• Deadline: Portability election via Form 706 is due within 9 months of death (or by the extended deadline if an extension Form 4768 is filed). Missing this deadline means losing portability, unless the IRS grants relief. In fact, the IRS issued Rev. Proc. 2022-32 which currently allows many estates that missed the deadline (and weren’t otherwise required to file) to still file a Form 706 up to 5 years later to get portability. This was a response to many who unknowingly missed the election. However, relying on this relief is risky – it’s best to file on time.
• No Portability of GST Exemption: It’s crucial to note that only estate/gift exemption is portable. The separate GST tax exemption is not portable. If the couple’s plan involves generation-skipping transfers (like leaving assets in trust for grandchildren), portability won’t preserve the first spouse’s GST exemption – that’s where a bypass trust and proactive planning would be needed to use the first spouse’s GST exemption.
• Pros and Cons: Portability has advantages and some limitations compared to traditional trust planning. Let’s break down a quick comparison:

Pros of Portability	Cons of Portability
Simple to implement – no complex trusts needed; just file an estate tax return to claim it.	The DSUE amount is fixed and doesn’t grow with inflation or asset appreciation (unlike assets in a bypass trust, which can grow outside the survivor’s estate).
Preserves the first spouse’s unused exemption, potentially doubling the amount the surviving spouse can transfer tax-free.	No GST tax exemption portability – you could waste the first spouse’s GST exemption if not used; not ideal for skipping-generation gifts.
Allows a full step-up in basis for assets at the second spouse’s death (surviving spouse owns assets outright, potentially reducing capital gains for heirs).	DSUE can be lost if the surviving spouse remarries and the new spouse predeceases – by law, you only get to use the last deceased spouse’s unused exemption.
Surviving spouse can use the inherited exemption during life for gifts as well, giving flexibility for lifetime giving.	Requires filing Form 706 for even small estates, which can be costly or burdensome (though simplified reporting is allowed under threshold).

In practice, portability is extremely useful for many married couples, especially since 2011 when it became law. For example, many couples no longer need elaborate bypass trusts (credit shelter trusts) just to use both exemptions – they can rely on portability. However, high-net-worth families or those with special asset concerns might still use trusts for control, asset protection, or GST planning, in which case portability complements but doesn’t replace good planning.

To fill out the portability section on Form 706, make sure to compute the DSUE correctly:

1. Calculate how much of the decedent’s basic exclusion was used by their taxable estate. If the taxable estate is less than the exemption, the difference is the unused amount.
2. Enter that unused amount as DSUE on the form.
3. Check the election box as instructed (usually an affirmative statement is required like “The executor elects portability of the DSUE to the surviving spouse”).

Example (Portability in a Small Estate): Recall Jane’s case: She had a $3M estate and was survived by her husband. She was well under the ~$13M exemption, so ordinarily no return was needed. But by filing Form 706 and electing portability, her executor can transfer roughly $10 million+ of unused exemption to her husband. If the husband later dies with, say, a $15M estate, he might only have to pay estate tax on the portion above his combined exemption (which could be around $13M personal + $10M DSUE = $23M total). Thus, their family potentially saves millions in tax by preserving Jane’s unused exemption. If the executor failed to file, that extra $10M exemption would be lost forever. This illustrates why even “small” estates of a first spouse should consider filing Form 706.

Generation-Skipping Transfer Tax (GSTT) on Form 706

In addition to the estate tax, Form 706 is also used to report and calculate the Generation-Skipping Transfer Tax for transfers that “skip” a generation. This typically comes into play if the decedent left substantial assets to grandchildren or great-grandchildren (or to trusts primarily for those beneficiaries), bypassing their children. The GSTT is a separate tax designed to ensure that very large transfers can’t avoid a layer of tax by skipping a generation.

Key points about GSTT:

• The GST tax exemption is equal in amount to the estate tax exemption (about $13 million per person in 2024). Each person can allocate this GST exemption to transfers that skip a generation, either during life or at death.
• The GST tax rate is a flat 40% on transfers that exceed the GST exemption. It’s imposed in addition to any estate tax. However, careful allocation of the exemption can often shield most or all generation-skipping gifts from the GST tax.
• Form 706 includes Schedule R (and R-1) to compute the GST tax due on direct skips at death. A “direct skip” is a transfer (e.g., a bequest) to a skip person (like a grandchild) that isn’t going through another taxed estate. For example, if a grandparent’s will leaves $1 million directly to a grandchild, that’s a direct skip potentially subject to GSTT. The estate would calculate GSTT on that $1M (after using any remaining GST exemption). If the decedent hadn’t used their GST exemption elsewhere, they could allocate $1M of it here to cover the bequest, resulting in no GST tax due. The Form 706 allows the executor to allocate GST exemption to cover skips.
• If assets are left in a trust that benefits skip persons (like a dynasty trust for grandchildren), then Schedule R-1 deals with transfers in trust (taxable distributions or taxable terminations in trusts). The calculations get more complex, often requiring expert guidance to allocate GST exemption properly among trusts.

In practice, many estates won’t owe GST tax because most people don’t skip their children in inheritance. But if a decedent was single with no children and left everything to grandchildren, or intentionally set up generation-skipping trusts, then the executor must pay attention to this section. Even if no estate tax is due (estate under basic exemption), a large bequest to a grandchild could trigger GSTT unless the GST exemption covers it.

Filling out GST sections on 706:

• Part 2, line 17 of Form 706 will ask for any GST tax due and any GST exemption allocated.
• Schedule R is where you list direct skips: you detail each skip transferee or trust, the amount, and the GST tax computation. If completely covered by exemption, you might still fill it to show allocation.
• If a trust is involved that won’t distribute outright to skip persons immediately, you might be filing a Schedule R-1 to allocate the decedent’s GST exemption to that trust, so that future distributions aren’t taxed.

The executor should consult the decedent’s estate planning documents (will or trust) to see if any grandchildren or skip beneficiaries are involved. If so, ensure to calculate how much of the GST exemption to allocate. Unlike estate tax which can be eliminated by marital or charitable deductions, GST tax can only be avoided by using the exemption or not skipping generations.

Quick example: Suppose a grandmother dies in 2025, leaving $2 million directly to a grandchild and the rest to her children. Her estate is $15M, so estate tax might be due on the part above exemption. Separately, that $2M to the grandchild is a direct skip. The grandmother had her full ~$13M GST exemption and didn’t use any in life. The executor can allocate $2M of that GST exemption to cover the bequest to the grandchild. As a result, GST tax $0 (because the skip was sheltered by exemption). If the estate was very large and she also set up a $10M trust for great-grandkids, the executor could allocate the remaining $11M GST exemption across those skips (2M to the direct skip, 9M to the trust) and any portion not covered (if any) would incur GST tax at 40%. All of this would be reflected on Schedules R/R-1 and the resulting GST tax (if any) would be added to the total tax due from the estate.

In summary, while GSTT adds complexity, Form 706 provides the framework to report it. Many executors for typical estates won’t need to wade deeply into this if there are no generation-skipping gifts. But it’s important to recognize the issue: leaving assets to grandchildren can trigger a tax equal to the estate tax again, unless managed with the separate exemption. Always consider whether GST applies, and seek specialized advice if large skip transfers are involved.

Step-by-Step Guide: How to Complete Form 706

Filling out Form 706 is a multi-step process. Breaking it down into steps can help ensure nothing is overlooked. Below is a step-by-step checklist for executors preparing Form 706:

1. Determine the Need to File: Evaluate the estate’s size and circumstances. If the gross estate + adjusted gifts exceed the threshold for the decedent’s year of death, the form is required. Also decide if you’ll file voluntarily for portability even if not required (for married decedents under the threshold). This is the first decision point.
2. Gather Essential Documents: Collect all documentation you’ll need to accurately report the estate:
   • Death certificate (you’ll attach a certified copy to the return).
   • The decedent’s will and any trust documents (to see asset distribution and any special provisions like charitable bequests or trusts).
   • Financial statements for all bank accounts, investment accounts (date-of-death or nearest).
   • Deeds and property tax statements for real estate.
   • Titles for vehicles, boats, etc.
   • Appraisals for real estate, businesses, or valuable personal property (art, jewelry) to establish FMV at death.
   • Outstanding bills, statements of debts, and invoices for funeral and administration expenses.
   • Gift tax returns (Form 709) the decedent filed, to list prior taxable gifts.
   • Life insurance policy information (face amount, ownership, beneficiaries).
   • Any partnership or corporate financials if the decedent had a business interest.
   • If claiming deductions like charitable or marital, documentation of those (e.g., trust details if setting up a QTIP trust, receipts from charities if available).
   • Prior estate tax returns of a predeceased spouse (if portability or credit for prior transfers is relevant).
     Basically, be prepared with every piece of financial info regarding the decedent’s assets and liabilities.
3. Complete the Top of Form 706 (General Information): Fill in the decedent’s personal info (name, Social Security number, date of death, domicile state, etc.) and the executor’s information (name, address, phone). If there are multiple executors, you may list co-executors. You’ll also answer some yes/no questions in Part 1 about the estate (for instance, did the decedent have any trusts, did you attach the will, is any property located outside the U.S., etc.). Remember to check the appropriate boxes if you are electing alternate valuation or any special valuation (like special-use valuation for a family farm under Section 2032A, if applicable – that one requires specific criteria). Also, indicate if this return is being filed only to elect portability (there’s a checkbox for that scenario as well).
4. Itemize the Assets on Schedules A–I: As described in the Gross Estate section, list all the decedent’s assets on the appropriate schedules:
   • For each asset, provide a description and the value as of date of death (or alternate date if elected). For real estate, include the address and parcel number; for stocks, include number of shares and stock name and value per share; for insurance, policy face amount and company, etc.
   • If any schedule does not apply (e.g., no annuities, no powers of appointment), you can write “None” on it.
   • Total each schedule and carry the totals to the Recapitulation (summary) on page 3 of Form 706. Double-check that assets aren’t accidentally omitted. It helps to cross-check against bank statements and the will/trust to ensure all known items are included.
5. List Deductions on Schedules J–O: Enter all applicable deductions:
   • On Schedule J, list funeral bills and itemized administrative costs (with payee and amount).
   • On Schedule K, list each debt or loan, with creditor name and amount outstanding at death. Include mortgages (with property description).
   • On Schedule L, list any losses (rare; if none, or if you’re not taking any here, it can be left blank or “None”).
   • On Schedule M, list assets or amounts passing to the surviving spouse that you are claiming as marital deduction. Typically, you might reference specific items from other schedules that are going to the spouse (some executors attach a statement or mark assets on other schedules with an asterisk that they go to spouse). Ensure the spouse is a U.S. citizen or note if it’s a QDOT.
   • On Schedule O, list each charitable bequest or gift and its value.
   • Total up the deductions and carry those totals to the summary on page 3. Attach supporting documents or explanations if needed (for example, a copy of the funeral home invoice, or a statement of account for debts, etc., as evidence).
6. Recapitulation and Taxable Estate Calculation: On page 3 (Part 5 – Recapitulation), fill in line 1 with the total gross estate (add up all Schedule A–I totals). Fill in line 2 with the total deductions (add up Schedules J–O totals). Subtract to get line 3, Taxable Estate. If there’s any state estate tax deduction (line 3b, for state death taxes paid), include that too before arriving at taxable estate. If any adjusted taxable gifts were made, note that you’ll be adding them in later on page 1, Part 2.
7. Calculate the Estate Tax (Part 2 of page 1): This is the heart of the tax computation:
   • On line 1, enter the taxable estate (from line 3 of Recapitulation).
   • On line 2, enter the amount of adjusted taxable gifts (lifetime taxable gifts). This usually comes from the summary of the decedent’s Form 709 filings. Essentially, sum all taxable gifts (beyond exclusions) made after 1976.
   • Add those to get line 3 (the combined amount). This is the number you plug into the IRS tax table to compute the tentative tax. The form’s instructions include a rate table, or for large values you might use the formula (which is often something like: 40% of (amount over $1 million) + a base amount).
   • Fill in the tentative tax on line 4.
   • Line 5a: If any gift tax was paid on gifts (unlikely, but if yes), put that here as a credit.
   • Unified Credit (Applicable Exclusion): On line 5b, enter the appropriate unified credit amount. If the estate is using the full standard exemption, this will be the maximum credit (e.g., $5,113,800 for 2023 deaths). If the decedent used some credit for gifts, adjust this. The form has a worksheet to compute how much credit is left based on exemption used. Basically, you subtract from the full credit any amount that was used by lifetime gifts. For smaller estates where no tax is due, you might end up using only part of the credit.
   • Line 5c/d: Enter any other credits such as state death tax credit (for deaths before 2005, mostly obsolete now, but for current, state taxes are a deduction not credit), credit for tax on prior transfers (if applicable), and foreign death tax credit. These are less common, but if applicable, they’d be calculated on Schedules P and Q and entered here.
   • Line 6: After credits, this line shows the Net estate tax due. If the credits exceed the tentative tax, this will be zero.
   • If any generation-skipping transfer tax is due (from Schedule R), that gets added in as well (Part 2, line 17). The total of estate tax plus GST tax will be the overall tax obligation of the estate.
8. Portability Election (if applicable): If there’s a surviving spouse and you’re electing portability, complete Part 6 – Section A of the form. State the DSUE amount being transferred. This is essentially the unused exemption: it equals the basic exclusion (for year of death) minus the amount of exemption the decedent actually used (for estate and gifts). Check the box that you are electing to transfer the DSUE. If you are not electing (and the estate is over threshold), you can opt out, but generally there’s no reason to opt out unless perhaps for some strategic reason (rare). Most either elect or the question is moot if no spouse.
9. Sign and Date the Return: The executor (or each co-executor, if multiple) must sign the Form 706 under penalties of perjury. If you paid someone to prepare the return, they should sign as the preparer as well. Make sure the date of signing and contact phone number are included.
10. Attach Required Documents and Schedules: Along with the filled form, attach:
    • A certified copy of the death certificate.
    • A certified copy of the Will (if the decedent died with a will, i.e., testate).
    • Copies of any relevant trust instruments (particularly if claiming marital or charitable deduction through a trust, or if trusts are involved in GST calculations).
    • Appraisals or valuation documents for major assets (especially if the value is not obvious or might be questioned).
    • Documentation for large debts or expenses (sometimes not required to attach, but prudent to have if audit).
    • Form 712 for life insurance (an IRS form life insurers provide stating the policy’s value at death).
    • Any power of attorney or authorizations if someone other than the executor is signing (like if executor used an agent).
      Basically, anything the instructions or circumstances dictate should be included. It’s better to be over-inclusive with supporting documents to preempt questions from the IRS.
11. Mail the Return to the IRS (or file electronically if that becomes available – traditionally, Form 706 is paper-filed to the designated IRS center for estate tax). The current addresses are listed in the Form 706 instructions, typically based on the state of the decedent’s domicile. Send via a traceable method (and keep a copy of everything!). If an estate tax payment is due, you must also arrange to pay it by the due date (nine months from death). The IRS expects payment by that deadline even if you got an extension of time to file. If liquidity is an issue (estate assets are tied up in a business or illiquid), there are provisions to request installment payments under Section 6166 or to defer payment under Section 6161 for reasonable cause – those require separate applications. But the majority of estates that owe will cut a check or wire the funds with the filing.
12. Keep Organized Records: After filing, keep a complete file of the return, all workpapers, and documentation. The IRS may take several months (or more) to review the return. If all is in order, and if an estate tax was due and paid, the executor can request an Estate Tax Closing Letter (formerly automatic, now you request it or pull an account transcript) which is essentially the IRS’s confirmation that the return is accepted and the tax obligation is satisfied. If no tax was due, the closing letter is still good to have for peace of mind (especially if large but non-taxable due to exemption or marital deduction). Executors often wait to distribute assets until they have some confirmation the IRS has signed off.

By following these steps methodically, you can fill out Form 706 completely and accurately. It’s not a simple form – it often runs dozens of pages with all schedules – but breaking it down as above makes it manageable. Next, we’ll illustrate how these steps play out in different real-world estate scenarios.

Real-World Examples: High-Net-Worth vs. Modest Estates

Example 1: High-Net-Worth Estate with Taxable Estate

Scenario: David was a successful entrepreneur who died in 2025, leaving an estate valued at $50 million. His assets included two homes (one in California, one in New York), substantial stock and bond investments, a 75% ownership in a private tech startup, several luxury cars, and personal collectibles (art and wine). He was widowed (no surviving spouse), and his will left $5 million to various charities and the rest to his two children.

Gross Estate: David’s executor had to marshal and value a large number of assets. They hired a professional appraiser for the real estate (valuing the California home at $8M and the New York condo at $4M). A business valuation expert assessed David’s startup shares at $10M (since it’s illiquid, they provided a detailed appraisal report considering the company’s financials). Publicly traded stocks worth $20M were easier to value via brokerage statements. The art collection, estimated at $2M, required an art appraiser’s report. All these went onto the respective schedules (A for real estate, B for securities, F for the business interest and tangible personal property like art, etc.). Life insurance: David had a $1M life insurance policy he owned; even though it paid out to his kids, because he owned it, the $1M was included on Schedule D. His gross estate came to roughly $50M.

Deductions: The executor listed about $150,000 of funeral and administrative expenses (attorney fees, appraisal fees, etc.) on Schedule J. David had a $2M loan outstanding (tied to his business) and $100K credit card debt, which went on Schedule K. Importantly, $5M was left to IRS-qualified charities, which was deducted on Schedule O. There was no surviving spouse, so no marital deduction. Total deductions summed to about $7.25M. That made the taxable estate roughly $42.75M.

Tax Computation: David had not made significant lifetime gifts (assume $0 adjusted taxable gifts). The estate tax base is $42.75M. The tentative estate tax on that (at 40% for most of it) came out to around $16.8 million. From this, the executor subtracts the unified credit (~$5 million covering the exemption). There’s no spouse’s DSUE to use (widowed, and previous spouse used their own). No prior gift taxes paid, no credits for prior transfers or foreign tax. Net estate tax due: roughly $11.8 million. This tax had to be paid within 9 months of David’s death. The executor might have had to liquidate some investments or even arrange a loan to pay this, given a lot of wealth was tied in a private company. (They could consider a Section 6166 payment plan because a business interest was involved, potentially spreading payments over up to 15 years for the portion of tax attributable to the closely-held business.)

Summary: The executor files Form 706 reporting the $50M estate, claims the deductions, and ends up paying about $11.8M in estate tax. The charities received $5M tax-free (and in fact saved the estate about $2M of tax by being deducted). The children inherit the remaining assets after tax. This example shows how a high-net-worth estate, even after using the full exemption, can face a substantial tax bill. It also underscores the need for thorough appraisals and sometimes liquidity planning to pay the tax.

Example 2: Modest Estate Below Exemption (Portability Case)

Scenario: Susan died in 2024 with an estate worth $5 million. She was married to John (her surviving spouse). Her assets were a house ($1.2M), a 401(k) and savings ($2M), and a small vacation cabin ($800K), plus personal items ($100K) and a life insurance policy of $900K (which she did not own—her son was owner and beneficiary, so interestingly that insurance was not in her estate). Susan had minimal debts ($50K) and left everything to her husband John in her will.

Gross Estate: Susan’s executor listed the house and cabin on Schedule A with real estate appraisals. The bank and retirement accounts on Schedule C or B. Personal items on Schedule F (though of modest value). The insurance was not listed because Susan had no incidents of ownership (her son owned the policy; thus the $900K payout was not included in the estate at all). The gross estate came to $5M.

Deductions: Since all $5M went to John, a U.S. citizen spouse, the marital deduction fully applies. On Schedule M, the executor listed the house, cabin, accounts – basically the entire estate – as marital transfers. The $50K of debts was listed on Schedule K as well. So deductions totaled about $5.05M (marital plus debts and expenses), technically even exceeding the gross estate, which effectively reduces the taxable estate to $0.

Tax Computation: The taxable estate after unlimited marital deduction is $0. No estate tax at all. Normally, an estate in this situation (below $13M and all to spouse) would not be required to file Form 706 because there’s no tax and it’s below threshold. However, Susan’s executor wisely chooses to file anyway to elect portability. By doing so, John can add Susan’s unused exemption to his own. Susan used none of her ~$12.92M exemption (2024 amount). So her DSUE is essentially the full $12.92M. The executor completes Form 706, mainly filling out the basics, listing assets (perhaps using the special provision for simplified reporting for an estate under the filing threshold: in such cases, the IRS allows not every asset to be itemized if not needed, but here they itemized to show marital deduction). He then indicates a DSUE of $12.92M transferring to John.

Outcome: John receives Susan’s assets free of estate tax due to the marital deduction, and now has effectively about $12.92M extra exemption. If John’s own estate is large (say John has $10M of his own assets), upon his later death he might have a combined exemption of John’s own (which by then maybe ~$14M if year 2025/26) plus Susan’s $12.92M, totaling nearly $27M. This could shield John’s estate entirely from tax. If the executor hadn’t filed Form 706, John would only have his single exemption and anything above that would be taxed at 40%. This example demonstrates how even a “small” estate benefits from a Form 706 filing solely for portability reasons. The complexity and cost of filing the form is relatively small compared to the potential tax saving for the survivor’s estate.

These two examples show opposite ends of the spectrum: a taxable estate where Form 706 was about calculating and paying a large tax, and a non-taxable estate where Form 706 served as a planning tool to carry forward tax benefit. In both cases, the executor’s role in accurately valuing assets and leveraging deductions/credits was crucial.

State Estate Taxes and Inheritance Tax Variations

Up to now, we’ve focused on the federal estate tax (Form 706 deals with that). However, state-level death taxes can also come into play and vary widely. Executors must consider:

• Does the decedent’s state of residence impose its own estate tax?
• Did the decedent own property in a state that has an estate or inheritance tax?
• What are the thresholds and rules for those state taxes?

State Estate Taxes: As of mid-2020s, a number of states (and D.C.) still impose an estate tax on top of the federal tax, but with typically lower exemption amounts. For example:

• Massachusetts and Oregon have estate tax exemptions of only around $1–2 million (Massachusetts recently increased from $1M to $2M in 2023). This means an estate of, say, $3 million in Massachusetts would owe state estate tax even though it owes nothing federally.
• New York offers an exemption (~$6.58M in 2023, adjusted yearly) but beware the “cliff” – if an estate exceeds the NY exemption by more than 5%, it loses the exemption entirely and the whole estate is taxed by NY.
• Illinois has a $4M exemption. Maryland around $5M. Hawaii and Maine around $5-6M (often indexed).
• Washington State has about a $2.2M exemption and top rate of 20%.
• District of Columbia about $4-5M exemption.
• States like Connecticut have higher exemptions (CT is matching federal now at around $12M).
• Many states no longer have an estate tax (for instance, California, Florida, Texas, etc., have none).

If a state estate tax applies, the executor may need to file a state estate tax return (often a state-specific form, e.g., “Form ET-706” in some states) and pay any state tax due, usually within the same 9-month timeframe. The good news: any state estate tax paid can be deducted on the federal Form 706 (line 3b deduction), reducing the federal taxable estate slightly (though since 2005, it’s a deduction, not a direct credit, so the benefit is at most 40% of the state tax).

Inheritance Taxes: A few states impose an inheritance tax instead of (or in addition to) an estate tax. Inheritance tax is levied on the recipients of the inheritance, and the rate usually depends on the relationship to the decedent. For example:

• Pennsylvania charges inheritance tax to most beneficiaries: ~4.5% for direct descendants, 12% for siblings, 15% for others (spouses are 0% in PA).
• New Jersey has no estate tax now, but an inheritance tax for non-immediate family beneficiaries.
• Nebraska and Iowa (Iowa’s is phasing out) also have inheritance taxes.
• Maryland uniquely has both an estate tax and a small inheritance tax (Maryland’s inheritance tax is 0% for close relatives, 10% for others).

Inheritance taxes are typically the responsibility of the beneficiary, but often the executor facilitates payment from the estate (especially if the will directs it or to avoid hassle for the heir). These do not get reported on Form 706, but the amount of inheritance tax paid can often be deducted as an expense of the estate (since it’s a liability related to the transfer) on Schedule K or as a state death tax on line 3b, depending on how it’s characterized.

Federal vs. State: Key Differences

Federal Estate Tax	State Estate/Inheritance Tax
Exemption is very high (e.g., ~$13 million in 2025 per person) – most estates are exempt.	Exemptions vary by state, many are much lower (e.g., $1M, $2M, $4M), capturing more estates in those jurisdictions.
Flat top rate of 40% (with graduated brackets leading up to it).	Rates vary: estate tax rates in states range ~10% to 20%; inheritance tax rates ~0% to 15% depending on heir class.
Unlimited marital deduction and portability of unused exemption.	Most states also have a marital deduction for a spouse. Portability is generally NOT available at the state level, with a few exceptions.
No inheritance tax at federal level; beneficiaries don’t pay tax on inheritances (the estate does).	Inheritance tax states do tax certain beneficiaries, meaning the heir might have to pay or the estate withholds it.
Only one return (Form 706) for all U.S. assets of a citizen/resident.	Separate state returns needed for each state where the decedent resided or owned real property (e.g., if lived in one state and owned vacation home in another state with estate tax, that state can tax that property).

Executor’s responsibility: Check the laws for the decedent’s state of domicile and any state where real estate or tangible property is located. Often, if an estate is large enough to file a federal 706, there will be some state considerations:

• If the home state has an estate tax, file that return and pay tax accordingly. (The thresholds may cause a return even if no federal return, e.g., a $3M estate for a Massachusetts resident triggers MA estate tax filing and tax, despite no federal tax.)
• If property is in a state with estate tax and decedent was non-resident, usually that state taxes just the in-state property (and expects a prorated estate tax return).
• Provide heirs with documentation if any inheritance tax is due on their share, or handle it from the estate if the will directs.

Planning note: State estate taxes often kick in at much lower levels, so planning might be needed to minimize them (like gifting or using trusts). But as an executor, your role is to comply with existing law: file any required state returns and claim any deductions on the federal return for those state taxes paid.

In wrapping up the estate, ensure that all tax clearances are obtained. Some states issue an estate tax closing letter or require a lien release for real estate. These vary but can impact the ability to distribute or sell property.

In short, don’t ignore state taxes. Form 706 might be pristine, but a surprise state tax bill can upset heirs if unanticipated. Always research the state requirements or consult a local estate attorney in the decedent’s state to cover those bases.

Common Mistakes to Avoid on Form 706

Even experienced professionals can stumble on the complexities of estate tax prep. Here are common mistakes to avoid when filling out Form 706:

• Missing the Filing Deadline: Forgetting the 9-month deadline (or failing to request an extension) can result in late filing penalties. Always calendar the due date and submit Form 4768 for an automatic 6-month extension if you need more time. Note: Payment of any expected tax is still due in 9 months even if you extend the paperwork.
• Not Filing When Required or Beneficial: Some executors erroneously assume “no tax, no file.” If the estate exceeds the threshold, you must file even if no tax after deductions. Also, if a surviving spouse could benefit from portability, file the return even if not required – waiting until later can be too late or require expensive private letter rulings for relief.
• Omitting Assets: Every asset must be accounted for. Commonly missed items include last wages or salary, final bank account interest, state income tax refunds due, loans owed to the decedent, or property the decedent had a partial interest in. Missing an asset can trigger IRS audits and penalties. Do a thorough inventory.
• Incorrect Valuations: Using outdated or unsubstantiated values is a mistake. All valuations should reflect fair market value at death. Don’t guess – use qualified appraisals for real estate, businesses, and unique items. Underestimating value to reduce tax is unlawful and can lead to penalties and interest when the IRS corrects it. Overestimating isn’t illegal, but it means overpaying tax and possibly shortchanging heirs. Aim for accurate, well-supported values.
• Not Providing Appraisal Documentation: If you have appraisals for significant assets, attach summaries or key pages. For very valuable artwork (over a certain threshold, e.g., $50,000), the IRS has an Art Appraisal Panel that may review the valuation – it’s essential to have professional appraisals in such cases. Failure to provide backup invites questions and delays.
• Mishandling Jointly Owned Assets: A frequent error is including the wrong amount for joint property on Schedule E. Remember, for spouses, generally 50% is included (if joint with rights of survivorship). For non-spouse joint owners, include the portion the decedent provided. If dad and daughter jointly own a bank account and all funds were dad’s, then 100% might be includible, not 50%. Pay attention to the contribution rule to avoid under/over reporting joint asset values.
• Improper Deductions: Deduct only what’s allowed. For example, family maintenance expenses or lavish tombstones might not be fully deductible if they’re excessive. Another pitfall: trying to deduct expenses on both Form 706 and the estate’s income tax return – you must choose one (you can attach a statement if you opt to deduct certain administration expenses on the 1041 instead of 706). Also, if claiming a marital or charitable deduction, ensure the asset actually passes to the spouse or charity in a qualifying manner (e.g., don’t deduct an entire trust amount on Schedule M unless it’s a QTIP trust or otherwise qualifies).
• Overlooking Portability Opportunities: As stressed, failing to elect portability for a small estate with a surviving spouse can be a huge lost opportunity. It’s an easy election to make by filing the return. Conversely, if the surviving spouse isn’t a U.S. citizen and you plan a QDOT, make sure to properly execute that plan on the return to get the marital deduction.
• Using the Wrong Form or Not Understanding Special Forms: U.S. citizens and residents use Form 706, but if the decedent was a nonresident alien with U.S. assets, the estate should file Form 706-NA (with a much smaller exemption, typically only $60,000, unless a treaty allows more). Filing the wrong form can cause processing nightmares. Also, estates that include qualified domestic trust distributions after the fact file Form 706-QDT, etc. Know your scenario.
• Math Errors: While much of the addition and subtraction seems straightforward, it’s easy to slip up given the multiple schedules. Double-check all totals, cross-foot the Recapitulation, and verify the tax computation against the IRS tax table. A minor arithmetic mistake can cascade into a notice from the IRS. Fortunately, many practitioners use software which catches math errors, but if doing by hand, be meticulous.
• Not Keeping a Copy / Records: Believe it or not, some executors fail to keep a full copy of the submitted return and attachments. Given the size of Form 706, always keep a complete copy. The estate and beneficiaries may need to refer to it years later (especially if the surviving spouse uses portability, the DSUE amount is on that return).
• Forgetting to Request a Closing Letter: After filing and paying any tax, it’s prudent to request an estate tax closing letter from the IRS (now typically requested by contacting the IRS about 4-6 months after filing, or by checking an account transcript that shows code “421” indicating closed). While not a “mistake” per se, failing to obtain official closure could complicate the final estate administration. The closing letter is often required by courts or trustees to ensure the tax matters are resolved. If you don’t ask, you might not get it automatically.

By avoiding these common mistakes, you greatly smooth the path to an accepted Form 706 and a properly closed estate. When in doubt on any aspect, consult the Form 706 Instructions or a qualified estate tax professional, because errors on an estate tax return can be costly and difficult to fix after the fact.

Frequently Asked Questions (FAQ) about Form 706

Q: Do I need to file Form 706 if my estate’s value is under the federal exemption?
A: Generally no, you don’t have to file if under the threshold. However, you should file if you want to elect portability of unused exemption for a surviving spouse.

Q: What’s the difference between Form 706 and Form 1041?
A: Form 706 is the estate tax return on transfers at death. Form 1041 is the estate income tax return, reporting any income the estate earns during administration (required if estate earns over $600).

Q: Who is responsible for filing Form 706?
A: The estate’s executor or personal representative files Form 706. If no executor is appointed, the person in control of the decedent’s property (or anyone receiving property) may be responsible for filing.

Q: Can I file Form 706 late to claim portability for a spouse?
A: Possibly. The IRS allows certain estates to file late (within 5 years of death) to elect portability if they were under the threshold and missed the deadline. It’s via a special relief procedure (no user fee under Rev. Proc. 2022-32).

Q: Are life insurance proceeds counted in the estate?
A: Yes, if the decedent owned the policy or had control over it. The full death benefit is included in the gross estate. If the decedent had no ownership (policy owned by an ILIT or another), then it’s not included.

Q: How do I value a house or other real estate for the estate?
A: Use the fair market value at the date of death. Typically, you’d obtain a professional real estate appraisal. The appraiser considers comparable sales and conditions as of the date of death.

Q: My parent gave me a large gift before they died. Does that affect the estate tax?
A: It could. Large lifetime gifts use some of the decedent’s estate tax exemption. The amount of those taxable gifts will be added to the estate’s value on Form 706 to calculate tax (though not double-taxed, they count against the exemption).

Q: If no estate tax is due, why is Form 706 still so detailed?
A: The IRS wants to see how the estate is not taxable. Detailed schedules show values and deductions (like marital or charitable) that explain why no tax results. Also, for portability, they need the numbers to establish DSUE.

Q: Does an estate get a step-up in basis on assets even if no Form 706 is filed?
A: Yes. All assets in a decedent’s estate receive a basis step-up (or step-down) to fair market value at death by law, not by filing the form. Filing 706 doesn’t directly affect basis, but it documents values that could be used to support the stepped-up basis if ever questioned.

Q: What if the estate doesn’t have the cash to pay the estate tax?
A: The executor can request to pay in installments (up to 10-15 years) if a large portion is a closely-held business (under §6166), or request a short-term extension for liquidity reasons (§6161). Otherwise, the executor might need to liquidate or borrow against estate assets.

Q: How long does the IRS have to audit or question Form 706?
A: The IRS generally has 3 years from the filing date to audit an estate tax return (longer if fraud or substantial understatement). If they accept it and issue a closing letter, that typically means the audit window is closed.

Q: Can I deduct expenses like home maintenance or property sale costs on Form 706?
A: Certain administration expenses (including maintaining estate property before sale, or realtor fees on selling estate assets) can be deducted if they’re necessary to preserve or distribute the estate. These often go on Schedule L or J, depending on circumstances.

Q: What’s a Federal Estate Tax Closing Letter and do I need it?
A: It’s an official IRS letter confirming the estate tax return was accepted and the file is closed. It’s helpful for your records and some courts require it for executor discharge. You can request it from the IRS after the tax is paid and return processed.