What is IRS Form 706 Really For? (w/17 Examples)

According to a 2023 Caring.com survey, 2 out of 3 Americans don’t have any estate planning documents. It’s no surprise then that many families are caught off guard by IRS Form 706 – the federal estate tax return. So, what is IRS Form 706 really for? Put simply, Form 706 is used to report a deceased person’s estate to the IRS, calculate any federal estate tax due, and claim important tax provisions (like the spousal exemption transfer) if applicable. In this comprehensive guide, we’ll demystify Form 706 and the estate tax in plain English.

What you’ll learn:

🔍 Purpose & Filing – Understand what Form 706 does and exactly who must file it (hint: most people won’t ever need to).
🏛️ Federal vs. State – Learn the difference between the federal estate tax and state estate/inheritance taxes (and why your state might tax an estate even if the IRS doesn’t).
💡 Big Tax Breaks – Discover key tax concepts like the unified credit and portability that can save your family millions in estate taxes (and how Form 706 makes them possible).
⚠️ Pitfalls – Avoid common mistakes (missed deadlines, undervaluing assets, etc.) that could cost your heirs dearly or waste big tax-saving opportunities.
📚 Real Examples – See 17 real-world scenarios that bring these concepts to life – from family farms and small estates to multi-million-dollar estates – so you know exactly how Form 706 works in practice.

Form 706 in a Nutshell: The True Purpose of the Estate Tax Return

IRS Form 706 – officially the United States Estate (and Generation-Skipping Transfer) Tax Return – is the form used to calculate and report federal estate tax. In essence, it’s how an estate tells the IRS, “Here’s what the deceased owned, here’s what it’s worth, and here’s what tax (if any) we owe on it.” The primary purpose of Form 706 is to figure out if an estate is subject to federal estate tax and to compute the tax due. It also serves as the vehicle to claim certain tax benefits or elections related to an estate, such as the portability election (transferring unused exemption to a spouse) or GST tax allocations (for generation-skipping transfers).

Most people will never file Form 706. That’s because federal estate tax only hits estates above a high value threshold. For 2024, that filing threshold (the estate tax exclusion amount) is $13.61 million of net assets for an individual (about $27.22 million for a married couple, combined). In 2023 it was $12.92 million, and it’s indexed for inflation each year. If a person’s total estate value is below the exclusion amount, no federal estate tax return is required – and no federal estate tax will be due. In fact, only a tiny fraction of U.S. estates (well under 1%) are taxable at the federal level under current law.

Example: A middle-class individual dies in 2025 with a $500,000 estate (home, car, and savings). No Form 706 is required because the estate’s value is far below the federal exemption. The heirs inherit everything free of federal estate tax, and there’s nothing to report to the IRS.

However, for those relatively few estates that do exceed the threshold, Form 706 is mandatory. Failing to file Form 706 for a taxable estate can result in hefty IRS penalties and interest, just like failing to file an income tax return would. Even if no tax is ultimately owed (due to deductions or credits), a return is generally required if the gross estate is above the limit.

Beyond the wealthiest estates, some smaller estates also choose to file Form 706 in specific situations, even when no tax is owed. The two main reasons are:

Portability Election: If a married person dies and the estate is under the exemption, the surviving spouse can file Form 706 to claim the unused portion of the decedent’s exemption. This adds that unused amount to the survivor’s own future exemption. (We’ll explain this portability benefit in detail later.)
GST Tax Planning: If the decedent left assets to grandchildren or into certain trusts, filing Form 706 might be needed to allocate GST (Generation-Skipping Transfer) tax exemption or pay GST tax. This can be true even if the estate isn’t large enough to owe regular estate tax.

In summary, IRS Form 706 is really for estates of wealthy individuals – or those with special tax planning needs – to settle up any federal estate tax obligations. It ensures that Uncle Sam gets any estate tax due from large transfers of wealth, and it also provides a mechanism for estates to secure valuable tax elections (like spousal exemption portability).

When (and Why) You Need to File Form 706

Not sure if Form 706 applies to an estate you’re handling? Here are the primary scenarios when Form 706 must or should be filed:

Estate Value Over the Federal Exclusion: If the gross estate, plus any large lifetime gifts the person made, exceeds the federal estate tax exclusion for the year of death, Form 706 is required. This is the most common trigger. For example, if someone dies in 2024 leaving a $15 million estate, a Form 706 must be filed (since $15M > $13.61M). The form will calculate any tax on the amount over $13.61M.
Portability for a Married Spouse: If the estate’s value is below the exclusion (so no tax due) but the deceased was married, the surviving spouse may choose to file Form 706 to elect “portability.” By doing so, the spouse inherits the decedent’s unused exemption amount. Example: A husband dies in 2023 with a $5 million estate. No tax is owed (under $12.92M), but his wife files Form 706 to capture his unused ~$7.92 million exemption. Years later, that could save her estate millions in taxes. If no Form 706 is filed, that extra exemption is lost forever.
Generation-Skipping Transfer (GST) Situations: If the estate involves transfers to grandchildren or more remote heirs, or to certain types of trusts, a Form 706 may be needed to calculate GST tax or to allocate the decedent’s GST exemption to those transfers. Example: A grandmother leaves $2 million directly to her grandchild. Even if her estate is under the normal limit, she (through her executor) might file a Form 706 to allocate GST exemption to that gift, ensuring no future GST tax when the grandchild gets the money. If the amounts exceed GST exemption, the form will compute a 40% GST tax on the transfer.

Those are the big three. In rare cases, Form 706 might also be filed for other technical reasons, like certain qualified conservation easements, or when a person who was not a U.S. citizen/resident had U.S. assets (though that typically uses a variant form, 706-NA). But for most readers, if an estate is nowhere near the multi-million-dollar mark, you won’t need to deal with Form 706 at all – unless you’re electing portability for a spouse.

To clarify these scenarios, here’s a quick reference table of three common situations and whether Form 706 comes into play:

Estate Scenario	When Form 706 is Used
Estate exceeds the federal exemption	Required. A return must be filed if the gross estate (plus past taxable gifts) is above the exclusion (e.g. $13.61M for 2024). The form calculates estate tax on the excess.
Estate below exemption, spouse survives	Optional (Portability). No tax due, but filing allows the surviving spouse to inherit the unused exemption (portability). Beneficial if the survivor’s own estate might be large.
Generation-skipping gifts or trusts	Sometimes. If leaving assets to grandchildren or certain trusts, Form 706 is used to allocate GST exemption or pay GST tax. Even estates under the limit might file to document these transfers.

Real-world example: John, a widower, died in 2025 with an estate valued at $14 million. The exclusion for 2025 is around ~$14 million (estimate). His estate is just at the borderline. Because he also made $2 million in taxable gifts during life, his total taxable transfers exceed the limit. John’s executor must file Form 706. On the form, they’ll add the $14M estate + $2M prior gifts = $16M total. After applying John’s $14M exclusion, about $2 million is taxable, and the estate tax (at roughly 40%) will be computed on that $2M. In this case, approximately $800,000 of estate tax would be due to the IRS.

How Form 706 Works: Calculating the Estate Tax Step by Step

Once you determine that Form 706 needs to be filed, the real work begins: cataloging the entire estate and calculating the tax. Form 706 is quite detailed – the current version spans dozens of pages when you include all the schedules. Here’s a simplified overview of how Form 706 is completed and how the estate tax is determined:

1. Tallying the Gross Estate (What’s Included?)

The process starts with the gross estate – essentially everything the decedent owned or had certain interests in at the time of death. This includes obvious assets and some not-so-obvious ones:

Real estate: Homes, land, commercial properties (Schedule A of the form).
Financial accounts: Bank accounts, investment portfolios, stocks and bonds (Schedule B for securities, Schedule C for cash and mortgages, etc.).
Business interests: Ownership in a business, partnerships, LLCs, or farm interests (Schedule F or Schedule G depending on structure).
Life insurance: If the decedent owned any life insurance policies on their own life, the payout is included in the estate’s value (Schedule D). (Many people don’t realize this: a $1 million life insurance policy can inadvertently push an estate over the threshold if the decedent owned the policy. If the policy was owned by an irrevocable life insurance trust or someone else, it might be excluded.)
Retirement accounts: IRAs, 401(k)s and similar accounts (Schedule I). These are included at their date-of-death value (though special income tax considerations apply to heirs for these).
Personal property: Valuable personal items like cars, jewelry, artwork, collections, boats, etc. (also Schedule F). Basically, anything of monetary value the person owned.
Certain trust assets or past transfers: Some assets the decedent gave away before death might still count in the estate for tax purposes. For example, property the decedent gave away but kept a life interest in (like a house transferred to kids but the parent kept living there) can be pulled back into the gross estate (these go on Schedule G). Also, any taxable gifts made during life (above annual gift tax limits) are noted on the return, because they use up part of the lifetime exemption.

All assets are valued at fair market value as of the date of death (or optionally, the alternate valuation date – six months after death – if that election reduces the estate’s value and tax). Getting accurate appraisals is critical. The IRS expects documentation for how you valued real estate, businesses, artwork, etc. Underestimating values can lead to audits and penalties, while overestimating means overpaying tax. Executors often hire professional appraisers for major assets to get it right.

Example: Maria passed away owning a small business and a personal residence. The business was recently valued at $4 million, and her home at $800,000. She also had $1 million in stocks and savings. Her gross estate is $5.8M. Since that’s below the current exemption, no federal estate tax will be owed. No Form 706 is required unless her estate elects portability or there are unusual circumstances. Maria’s children inherit the business, house, and assets without federal tax. (However, they’ll benefit from a step-up in basis on those assets – meaning the valuations used for the estate become their new cost basis, minimizing capital gains if they sell. This step-up happens whether or not an estate tax return is filed, for any inherited property.)

2. Subtracting Deductions (What Lowers the Taxable Estate?)

After listing everything in the gross estate, Form 706 allows numerous deductions that can drastically reduce the taxable estate. Key deductions include:

Debts and Liabilities: Any outstanding mortgages, loans, credit card debt, or other obligations the decedent owed at death can be deducted. Also deduct funeral expenses and the cost of estate administration (attorney fees, executor fees, appraisal costs, etc.). These go on Schedules J and K. Essentially, the estate tax is on net worth, not gross, so legitimate debts reduce the taxable amount.
Transfers to Surviving Spouse (Marital Deduction): Assets left to a surviving spouse are generally fully deductible from the estate’s value, as long as the spouse is a U.S. citizen. This is the unlimited marital deduction. It means a married person can leave everything to their spouse and no federal estate tax will be charged on that transfer. The tax is deferred until the surviving spouse’s own death. (If the spouse is not a U.S. citizen, a special trust called a QDOT can be used to obtain a similar deferral – otherwise the marital deduction is limited for non-citizen spouses.)
Charitable Bequests: Any assets going to qualified charities are 100% deductible from the estate as well. If someone leaves a portion of their estate to charity (schools, religious organizations, nonprofits), that portion isn’t taxed. Charitable donations often eliminate or reduce estate tax for philanthropic wealthy individuals.
State Estate Taxes Paid: While the old credit for state death taxes is gone, the federal estate tax does allow a deduction for any estate or inheritance taxes paid to states. So if the estate pays, say, $100k to your state’s tax authority, that $100k reduces the taxable estate on the federal return (Schedule S).

After subtracting deductions, what’s left is the “taxable estate.” This is the amount upon which the federal estate tax is computed. In many cases, savvy estate planning zeros out the taxable estate by using the marital and charitable deductions. For example:

Example: Alan dies with a $20 million estate. In his will, he leaves $10 million to his wife and $5 million to a charity (with $5M to other heirs). The marital deduction knocks off $10M and the charitable deduction knocks off $5M. That leaves a taxable estate of $5M. If the estate tax exclusion is $13.6M, Alan’s taxable estate is now below the exemption, resulting in $0 estate tax due. Form 706 still needs to be filed (because his gross estate was $20M, above the threshold), but the return will show no tax owed thanks to these deductions. This example shows how powerful the marital and charitable deductions are – with the right plan, a large estate can pay no tax at the first spouse’s death or even at all, if much is given to charity.

3. Applying the Tax Rate and Unified Credit

After arriving at the taxable estate, the executor uses the tax tables in Form 706 to calculate the gross estate tax. The federal estate tax is progressive, but effectively any taxable amount over the exclusion is taxed at 40% (the top rate). In practice, because the exclusion is so high, most taxable estates pay a flat 40% on the amount above the exemption.

For example, suppose after deductions an estate has $3 million subject to tax (above the exemption). The tax would be roughly $1.2 million (40% of $3M). The form actually calculates it in brackets (18% starting at $0, then 20%, up to 40%), but there’s a credit that covers the lower brackets up to the exclusion amount. This brings us to the crucial concept of the unified credit.

Unified Credit (Estate Tax Exemption): The unified credit is basically the amount of tax credit that offsets the tax on the exclusion amount. In 2024, the exclusion is $13.61M, which corresponds to a tax of about $5.45M – that tax is offset by the unified credit. This is why the first $13.61M isn’t taxed. The term “unified” means it’s unified with the gift tax: you have one combined credit that covers lifetime gifts and your estate. If you use some credit during life (by making taxable gifts), you have less remaining at death.

So on Form 706, after calculating the tentative tax, the form applies any available unified credit to reduce the tax bill. Essentially, if your taxable estate is within the exemption, the unified credit wipes out the tax completely. If it’s above, the credit covers the tax on the first chunk (the exempt amount), and you pay 40% on the rest.

The form also accounts for prior gift taxes or gift credit used. If the decedent made taxable gifts above annual limits in the past, they would have filed Form 709 gift tax returns and used some of their unified credit. Form 706 requires you to report those past gifts and how much credit was used on them (that portion of the credit is not available for the estate now). The estate tax calculation effectively adds lifetime taxable gifts to the taxable estate to compute a total tax, then subtracts any gift tax already paid or credit used. This ensures no one gets to double-dip the exemption – you can’t give away $10M tax-free and also die with $13M tax-free; the combined gifts and estate must fit under the one exemption (currently ~$13M).

Example: Beth gave her children $8 million as gifts while she was alive (and filed gift tax returns using $8M of her exemption). At death, she has $6 million remaining in assets. Her gross estate is $6M, below the normal $13M exclusion. However, because she already used $8M of credit on the gifts, her remaining exemption is only ~$5 million (assuming ~$13M total minus $8M).

Now her $6M estate is $1M over her remaining exemption. Form 706 will add the $8M gifts + $6M estate = $14M total, calculate tax on $14M, then subtract credit (covering ~$13M worth). The result is that Beth’s estate will owe tax on about $1 million (the amount her total transfers exceed the allowed $13M). Roughly $400,000 in estate tax would be due. Beth’s case illustrates that large lifetime gifts can trigger a Form 706 filing and tax, even if the estate at death seems modest.

After credits, we arrive at the net estate tax due. This is typically payable by the estate (from its assets) within 9 months of death, unless an extension or special payment plan is arranged. Form 706 is due nine months after the date of death as well, though an automatic 6-month filing extension is available if requested (via Form 4768). Payment, however, generally is due at nine months even if you extend the paperwork; interest will accrue on any unpaid tax after that deadline.

Important: If the estate doesn’t have readily available cash to pay a large estate tax bill (for instance, if wealth is tied up in real estate or a family business), the tax law provides some relief options. One such option is Section 6166, which allows estates that consist largely of a closely-held business to pay the estate tax in installments over up to 15 years (with interest-only payments for the first few years). Another is Section 2032A for family farms and businesses, which lets the estate value certain property at its farm or business use value rather than full market value, potentially reducing the taxable estate. These elections are also made on Form 706 if the estate qualifies and chooses to use them.

Example: The Thompson family farm is appraised at $8 million if sold on the open market. But as a working farm, its value based on agricultural use is only $5 million. When the farm owner dies, the estate elects the special-use valuation on Form 706. This reduces the estate’s reported value by $3 million, saving potentially $1.2 million in estate tax. The heirs must continue to use the land as a farm for at least 10 years, or else pay back the tax savings (the form has Schedule A-1 for this election).

In another case, Jessica inherits her father’s manufacturing company worth $20 million, which makes up 80% of his estate. The estate faces a tax bill of several million dollars. Rather than sell the company, the executor opts for the installment payment plan (Section 6166) on Form 706, allowing the estate to pay the tax over time using the company’s earnings. These examples show that Form 706 isn’t just about calculating tax – it’s also how estates can elect special provisions to ease the tax burden or keep the family business/farm intact.

4. Don’t Forget: Generation-Skipping Transfer (GST) Tax

One section of Form 706 deserves special mention: Schedule R (and R-1), which deal with the Generation-Skipping Transfer tax. GST tax is an additional 40% tax on transfers that “skip” a generation – for instance, money left directly to grandchildren (skipping the children), or to certain trusts that will benefit grandkids or later generations. Each person has a separate GST tax exemption (equal to the estate tax exemption, ~$13 million) that they can allocate to skip transfers, shielding those from GST tax.

On Form 706, Schedule R is used to calculate any GST tax owed by the estate on direct skips (e.g. a grandparent leaving assets outright to a grandchild in a will). Schedule R-1 is a notice to trustees if a trust is involved. If the decedent hadn’t used their GST exemption during life, the executor can allocate it on the form to cover bequests or trust transfers to the grandkids, etc. If the transfers exceed the exemption, a flat 40% GST tax applies to the excess.

For most people, GST tax won’t come into play. But if someone is wealthy enough to have a taxable estate and is also skipping generations, Form 706 handles both taxes. The estate might pay both a 40% estate tax and a 40% GST tax on some transfers – yes, that can be brutal (though advanced estate planning can reduce this).

Example: Grandpa Joe wants to leave $5 million directly to his two grandchildren, with the rest of his estate to his children. If $5M exceeds his remaining GST exemption, his estate may owe ~40% GST tax on that transfer (about $2M!). To avoid this, Grandpa Joe’s estate will allocate any available GST exemption to that $5M on Schedule R. If he has enough GST exemption left (say he never used it and it’s $13M), no GST tax will be due – the exemption “soaks up” the GST tax just like the regular exemption covers estate tax. Form 706 is where this allocation is formalized. Executors should be careful to fill out Schedule R if needed, otherwise the IRS may auto-allocate or impose GST tax by default rules.

Portability: How One Form 706 Can Save Your Spouse Millions

Imagine a simple scenario: A husband and wife each have about $10 million in assets (so $20M combined). If one spouse dies, leaving everything to the other, no estate tax is due at that first death (thanks to the marital deduction). But what happens when the second spouse dies with, say, $20M? The estate tax exemption might be, for example, $13 million at that time. That would leave $7M taxable, leading to a tax of roughly $2.8 million. However, if the first spouse’s unused exemption could be re-used by the survivor, the couple could shield double the amount, potentially avoiding tax entirely. That’s exactly what portability accomplishes.

Portability is a provision of the tax law that allows a surviving spouse to inherit their deceased spouse’s unused estate tax exclusion. This inherited amount is called the DSUE – Deceased Spousal Unused Exclusion. It effectively lets married couples combine their exclusions (currently over $13M each, so over $26M combined in 2024).

But portability is NOT automatic. The only way to get it is by filing a timely Form 706 for the first spouse to die, even if that estate didn’t otherwise need to file. On that Form 706, the executor elects portability and computes the amount of unused exclusion to transfer to the widow/widower.

Why go through the trouble? Because for many couples, especially those whose wealth may grow, portability can save huge amounts of tax down the road. It’s a form of insurance – even if the surviving spouse’s estate eventually exceeds a single exemption, the additional DSUE can cover the overflow.

Example: Michael and Lisa have a combined net worth around $15 million. Michael dies in 2024 with an $7 million estate left entirely to Lisa. No tax is due (everything went to a U.S. citizen spouse). Michael used $0 of his $13.61M exemption (since the marital deduction covered his whole estate). Lisa files Form 706 for Michael’s estate to elect portability. This reserves Michael’s unused $13.61M exclusion and ports it to Lisa. Now Lisa has her own exemption plus Michael’s – effectively over $27 million of coverage.

Years later, due to investments, appreciation, maybe life insurance payouts, Lisa’s estate grows to $20 million when she passes. Thanks to portability, her estate’s exclusion might be, say, $13.61M (her own, adjusted for inflation) + $13.61M (Michael’s ported amount) = ~$27.22M total. Her $20M estate is fully covered by the combined exemption, owing zero estate tax. If Michael’s executor hadn’t filed Form 706, Lisa’s estate would have only her single exemption and would have faced tax on the portion above ~$13M – potentially a $2–3 million tax bill. One relatively small hassle (filing the estate tax return when not technically required) saved the family millions later.

Clearly, if you’re an executor for the first spouse in a couple to die, you should strongly consider electing portability if the surviving spouse has any chance of a taxable estate in the future. It’s especially prudent given that the current high exemption is scheduled to drop significantly after 2025 (under current law, it will revert to around ~$6 million per person in 2026). A modest estate today could become taxable in a few years when the exemption plunges. Portability can lock in the currently high amount for both spouses.

How to Elect Portability: Simply put, file a complete Form 706 for the decedent and check the box for portability election (or include the required statement). Even if no tax is owed, the return will show the computation of DSUE (basically the decedent’s unused exclusion equals the exemption minus any taxable portion used). The deadline is the same: 9 months from date of death (you can file an extension for 6 more months). If an executor fails to file within that time, all is not necessarily lost – the IRS has issued extensions for certain late portability filings. Currently, an estate that was not required to file (no tax due) can still file a Form 706 up to 5 years late to claim portability, under a special relief procedure. But relying on that procrastination window is risky; it’s best to do it timely.

One caveat: Portability only transfers the basic exclusion, not any GST exemption. Also, if the surviving spouse remarries and outlives a second spouse, the DSUE from the first spouse can be lost – you only get to use the unused exemption of your last deceased spouse. So estate planners advise using the first spouse’s DSUE as much as possible (through gifts or trusts) before any potential remarriage, or at least be mindful of that rule.

Pros and Cons of Filing Form 706 for Portability: If you’re debating whether it’s worth filing an estate tax return for a smaller estate just to elect portability, consider the following:

Pros of Electing Portability	Cons of Electing Portability
Potential huge tax savings: Preserves the first spouse’s unused exemption (which could save millions in future estate tax for the surviving spouse’s estate).	Complexity and cost: Preparing Form 706 is time-consuming and often requires professional help (legal/accounting fees), even when no tax is due.
Peace of mind: Provides a safety net if the survivor’s assets grow or the tax law changes (like a lower future exemption). You won’t be caught short.	May be unnecessary: If the surviving spouse’s estate is very unlikely to ever exceed their own exemption (due to modest assets or plans to spend/gift down), the effort might not yield any benefit.
Easy election (with relief available): The IRS now gives up to 5 years to file late if no tax was owed, so even if you missed the 9-month deadline, you can still secure portability.	Last-spouse rule: If the survivor remarries and the new spouse dies first, the previous DSUE is lost. Portability isn’t useful if circumstances change (though one might use the DSUE before that happens).

Overall, electing portability is usually wise for any estate that’s not tiny. Given uncertain futures and changing tax laws, it’s often better to have it and not need it than to need it and not have it. Many executors now routinely file a “protective” Form 706 for portability if the surviving spouse has substantial assets or the combined estate could approach taxable levels down the line.

Real-world example: Susan was the executor for her late husband Jim’s estate, worth $3 million. Susan nearly skipped filing Form 706, since $3M is well under the exemption. But remembering advice about portability, she filed and secured Jim’s unused ~$9 million exclusion. A few years later, Congress allowed the high exemption to expire, dropping it to about $6 million. Meanwhile, Susan’s own assets had grown to $8 million including life insurance and home value. When Susan passed, the base exemption was only $6M – but her estate also had Jim’s $9M DSUE. Thus her total exemption was ~$15M, and her $8M estate owed nothing. If she hadn’t elected portability, her $8M would have exceeded the $6M exemption and owed estate tax on $2M (around $800k due). Filing that one form saved her heirs $800,000.

Don’t Forget State Estate & Inheritance Taxes (They Can Sneak Up on You)

Up to now, we’ve focused on the federal estate tax. But depending on where the decedent lived (or owned property), state-level estate or inheritance taxes can also apply – and these have their own forms and rules, separate from IRS Form 706.

Federal vs. State Death Taxes: What’s the Difference?

Federal Estate Tax: This is a national tax on large estates, with the high exclusion (~$12–13M per person currently). It’s what Form 706 is for. Only a very small percentage of estates owe federal estate tax today. The tax rate is up to 40%. Revenue goes to the U.S. Treasury.
State Estate Tax: Twelve states and D.C. impose their own estate taxes (as of mid-2020s). These work similarly to the federal tax (a tax on the overall estate), but exemptions are usually much lower. For example, Massachusetts has a $1 million exemption (recently changed to $2M in 2023), Oregon also $1M, Illinois $4M, New York about $6.58M, Washington about $2.2M, etc. The tax rates vary by state, often ranging from ~10% up to 16% or so on amounts above the state threshold. If a person lived (or owned real estate) in one of these states, their estate might owe a state tax even if no federal tax is due. Each state has its own estate tax return (for example, a New York Estate Tax Return or a Washington Estate Tax Return) which the executor must file with the state’s tax authority. Often, states require a copy of the federal Form 706 if one was filed, or even if not, some states demand a “pro forma” 706 to calculate state tax. In any case, IRS Form 706 does not cover state taxes – it’s a separate obligation.
State Inheritance Tax: A handful of states (currently 6 states, like Pennsylvania, New Jersey, Nebraska, Iowa, etc.) have an inheritance tax instead of (or in addition to) an estate tax. Inheritance tax is levied on the individual beneficiaries receiving the assets, and the rate depends on their relationship to the decedent. (Spouses are usually exempt; children often pay a lower rate; unrelated inheritors pay the highest rate.) For example, Pennsylvania taxes inheritances at 4.5% for children, 12% for siblings, and 15% for unrelated heirs. Maryland uniquely has both an estate and an inheritance tax. If you are dealing with an estate in an inheritance tax state, the executor might need to file an inheritance tax return and perhaps even withhold the tax from what’s distributed to certain heirs. Again, this is completely separate from Form 706. The IRS doesn’t care about who inherited what – that’s the state’s domain.

Key point: Even if an estate isn’t big enough to owe federal tax, check your state’s laws! The difference in thresholds can be dramatic. For instance, a $3 million estate in Oregon or Massachusetts would owe state estate tax (because it exceeds those states’ exemptions) even though it owes $0 federal tax. The executor must file the state estate tax form and pay the state tax out of the estate. Conversely, some states have no death taxes at all (Florida, Texas, California, and many others have neither estate nor inheritance tax). It’s entirely location-dependent.

Example: Eleanor, a resident of New Jersey, died with a $2 million estate split among her children and a nephew. New Jersey no longer has a state estate tax (it was repealed), but it does have an inheritance tax. Bequests to children are exempt in NJ, but transfers to a nephew are taxed at 15%. So Eleanor’s children receive their shares free of state tax, but the nephew’s share faces NJ inheritance tax. The executor will file a New Jersey inheritance tax return and pay the tax from the nephew’s portion. Federally, no Form 706 was required (since $2M < $12.92M), so the IRS is not involved at all. This scenario shows how state taxes can still bite smaller estates, even when the IRS is out of the picture.

Another example: Raymond lived in Maryland and left a $5 million estate to his daughter. Maryland’s estate tax exemption in the year of his death was $5 million – so his estate just hits the threshold. Maryland will impose a state estate tax on the amount over $5M (a small amount, since he’s right at the line), at a rate up to 16%. Meanwhile, no federal tax is due because $5M is below the federal exemption. Raymond’s executor must file a Maryland estate tax return and pay a relatively small tax, but no Form 706 is required for IRS.

Practical tip: If an estate is close to a state’s threshold, planning and timing can matter. As seen, Massachusetts recently raised its exemption from $1M to $2M – a welcome relief. Other states occasionally adjust theirs or even repeal these taxes, so the landscape changes. Always get current info for the specific state. And if the decedent owned property in multiple states, things can get complicated: generally, real estate is taxed by the state where it’s located, not the state of domicile, which might mean filing returns in multiple states for one estate.

In Form 706 itself, you’ll actually report any state estate tax paid (on the deduction schedule), but that’s about it at the federal level. The IRS doesn’t settle state tax; it just acknowledges it for deduction purposes.

Bottom line: Form 706 handles the federal estate tax only. Executors must separately ensure compliance with any state estate or inheritance tax requirements. Don’t assume because you’re under federal limits that you’re completely off the hook – always check your state’s rules so you don’t get an unpleasant surprise (or a notice from the state tax collector).

A Quick Legal Lowdown: The Law Behind Form 706 and Estate Tax

To truly understand Form 706, it helps to know where it comes from. The federal estate tax isn’t just some arbitrary creation of the IRS; it’s rooted in law passed by Congress and woven into the Internal Revenue Code (IRC). Here’s a brief overview of the legal and historical basis for Form 706 and the estate tax system:

Over a Century of Estate Tax: The U.S. has had an estate tax (in its modern form) since 1916. The idea was to tax the transfer of large wealth at death, as a means of raising revenue and somewhat curbing vast concentrations of wealth being passed down untaxed. Over the years, the estate tax has been through many changes – rates as high as 77% in the past, and one notable year (2010) when the tax was repealed entirely for that year. (This led to some famous cases: billionaires like George Steinbrenner died in 2010 and their estates legally paid $0 in estate tax because the tax wasn’t in effect then!) In 2011, the estate tax was reinstated, and a major law in 2012 permanently set a $5 million exemption, indexed for inflation. Then the Tax Cuts and Jobs Act of 2017 doubled that exemption starting in 2018. That’s how we arrived at the ~$12–13 million per person level we have now. Keep in mind, this doubled exemption is scheduled to sunset after 2025, potentially reverting to around $6 million (plus inflation). Congress could act to change it before then, but as of now, the clock is ticking on the historically high exemption. This legal backdrop is why estate planners are busy – many families are trying to lock in benefits before the law possibly tightens.
Internal Revenue Code Provisions: The estate tax laws are primarily in IRC Sections 2001 through 2058. For instance, Section 2001 imposes the tax on estates above the threshold. Section 2010 establishes the unified credit (exemption) amount. Sections 2031–2046 detail what’s included in the gross estate (life insurance in Sec. 2042, retained life interests in Sec. 2036, etc.). Sections 2051–2058 cover the deductions (2056 is the marital deduction, 2055 is charitable, 2053/2054 cover debts and expenses). Section 2631 provides for the GST tax exemption. And so on. These code sections are the legal foundation; Form 706 is essentially the IRS’s tool for implementing those laws. Each line or schedule of the form corresponds to one of these legal provisions.
Regulations and Guidance: The U.S. Treasury (which the IRS is part of) issues regulations and guidance that further interpret the law. For example, regulations explain how to value certain assets, how portability elections are to be made, etc. The IRS also publishes an extensive Instruction booklet for Form 706 that references the code and regulations to help executors comply. The form and instructions get updated as laws change – for instance, when the exemption increases each year, the IRS updates those figures on its website and in the form instructions.
Why So High an Exemption? Politically and legally, the estate tax exemption has been raised over time due to debates over fairness and economic impact. Today, fewer than 1 in 1,000 estates owe federal estate tax – it’s truly targeted at the ultra-wealthy. Some argue it should apply to more estates; others argue for eliminating it entirely. For now, the law strikes a compromise: allow a sizable amount to pass tax-free (for family farms, small businesses, and the middle class to not be affected), but still tax the largest fortunes. Form 706 is the mechanism by which the government tallies those large fortunes and their tax.
Unified Gift and Estate System: Importantly, the law treats large lifetime gifts and death transfers as a unified system. That’s why we have the unified credit and two forms: Form 706 for estates and Form 709 for gifts. The legal concept is that you shouldn’t escape tax by giving away assets right before death – it’s all part of one big tally. This has been in place since 1976 when Congress unified the gift and estate tax regimes. So if you’re dealing with an estate that had large gifts, you’ll see how Form 706 asks for data from past Form 709 filings to enforce this unified approach.

In short, Form 706 exists because Congress requires an accounting of big estates to impose the tax authorized by law. The IRS, as the nation’s tax administrator (an agency within the U.S. Treasury Department), is tasked with collecting these taxes. When you file a Form 706, it typically goes to a specialized IRS unit that reviews estate and gift tax returns. They might accept it as filed, or if something looks off (like suspiciously low valuations), they can audit and challenge the return – ultimately backed by the legal standards set in the tax code and courts.

For anyone delving into a Form 706, it can be reassuring (or sobering) to know that every line on that form has a legal reason for being there, whether it’s a code section, a regulation, or a revenue ruling. While you don’t need to be a lawyer to fill it out, complex or large estates often hire attorneys and CPAs because getting it wrong can mean violating federal law or missing out on a legal tax break.

Avoid These Costly Mistakes When Handling Form 706

Preparing an estate tax return can be an intimidating task. It’s easy to slip up given the complexity and the emotional circumstances following a death. Here are common mistakes and pitfalls to avoid with Form 706 (and estate administration in general):

Missing the Filing Deadline: Form 706 is due 9 months after the date of death. If you need more time, file an extension (Form 4768) before the 9 months are up to get an automatic 6-month extension. But note, an extension to file is not an extension to pay – if you anticipate tax due, you should pay an estimate by 9 months to avoid interest. Consequences: Late filing can incur a penalty (5% of the tax per month late, up to 25%), and late payment accrues interest and penalties. Example: An executor who “got busy” and filed the estate return 6 months late on a taxable estate might face tens of thousands of dollars in penalties. Don’t let that happen – mark the calendar and act promptly.
Not Electing Portability (Losing the Spouse’s Exemption): As discussed, failing to file Form 706 for a smaller estate when a surviving spouse exists can be a multi-million-dollar mistake. Many estates in the past ignored this, only for the widowed spouse’s estate to later incur tax that could have been avoided. If you’re advising a family or acting as executor, always consider portability. There’s little downside other than the hassle. Real story: We’ve seen cases where a widow had to seek professional help for a private letter ruling to get permission to file a late portability election – a costly legal process – because the executor initially skipped it. The IRS has since eased the rules (with the 5-year relief), but it’s best not to rely on retroactive fixes.
Inaccurate Asset Valuations: Underestimating the value of estate assets (whether accidentally or intentionally) is a serious error. The IRS can challenge values, leading to audits and increased tax plus penalties for undervaluation. Always obtain qualified appraisals for real estate, businesses, unique collectibles, or anything not readily traded. On the flip side, overestimating values means you might overpay estate tax or unnecessarily file a return. Aim for accurate, well-documented valuations. Attach appraisal summaries or valuation reports to the return for large items. If the IRS sees a professional appraisal attached, they’re less likely to challenge it. Never “guess” or use property tax assessments (for real estate) or outdated figures. This is one area where expert help is crucial.
Forgetting to Include (or Find) All Assets: Sometimes executors miss assets – old life insurance policies, stock certificates, safe deposit box contents, etc. Not only could that be bad for the heirs (assets overlooked), but if discovered later, it could require amending returns or could be seen as an omission. Do a thorough inventory of the decedent’s finances. Also, make sure to account for any lifetime gifts that the decedent made which require inclusion. Check prior Form 709 gift returns (if any were filed) and include those gift amounts on the estate return. An easy mistake is to ignore that the decedent gave $1 million to a trust a few years before – if it was a taxable gift, it needs to be reported because it uses part of the exemption.
Not Including Required Documents or Schedules: A Form 706 filing isn’t just the form – it often requires attachments: a copy of the death certificate, copies of appraisals, sometimes copies of wills or trusts (especially if claiming certain deductions or elections), and all required schedules filled out. Missing schedules (for example, not filling out Schedule B when the decedent had stocks) or not signing the return can delay processing or trigger IRS correspondence. Follow the IRS instructions checklist at the end of the form to ensure you include everything. If the decedent filed any gift tax returns (Form 709) in the past, you should attach copies of those or at least reference them, and carry over the gift tax results into the computation on Form 706.
Improperly Allocating the Tax or Debts: If the will or state law says certain assets or beneficiaries bear the tax, that’s a tax allocation clause. Executors must be careful in understanding who actually ends up paying the estate tax. While this isn’t directly a Form 706 error (the IRS just cares the tax is paid, not who pays it), it can be a family conflict if handled wrong. For instance, if someone gets a life insurance payout outside the will but that insurance caused estate tax, the will might say that beneficiary must contribute to the tax. As executor, make sure to follow those instructions. Avoiding family disputes is part of effective estate administration.
Overlooking State Tax Obligations: As noted, don’t just focus on the federal form. Neglecting a required state estate or inheritance tax filing can result in penalties from the state and liens on estate property. This is often overlooked if the executor isn’t aware of state laws. Always close that loop.
DIY When You Need Help: Underestimating the complexity of an estate tax return can be costly. If the estate is anywhere near taxable or has trusts, businesses, or unique assets, consider hiring a qualified estate attorney or CPA to assist. Yes, professional services cost money, but the estate pays those fees as an administration expense (deductible, by the way). It can save much more by avoiding errors. For simpler estates (well under the threshold, just filing for portability), one might handle it with diligence and maybe a consultation. But for a large estate: going it alone could mean missing planning opportunities or making a mistake that triggers an audit.
Lack of Record-Keeping: The executor should maintain a clear paper trail of how values were determined, how decisions were made, and all correspondence. The IRS (or beneficiaries) might ask for substantiation. Organize bank statements, appraisals, brokerage statements at death, etc. Also, after filing, keep a copy of the submitted Form 706 and all attachments. Estates can be audited even a couple of years later, and you’ll want to have everything handy.

By anticipating these pitfalls, you can navigate the Form 706 process much more smoothly. In short: be timely, be thorough, document everything, and don’t hesitate to seek professional guidance for complex issues. It’s much easier to do it correctly the first time than to clean up a mistake later under IRS scrutiny or legal pressure from heirs.

Decoding the Jargon: Key Terms & Entities Explained

The world of estate tax is filled with jargon and acronyms. Let’s break down some of the key terms and entities you’ve encountered (or will encounter) regarding Form 706 and estate planning, in plain English:

Internal Revenue Service (IRS)

The IRS is the Internal Revenue Service, the U.S. government agency responsible for collecting federal taxes and enforcing tax laws. When you file Form 706, it is sent to the IRS (specifically, usually to the IRS Cincinnati Service Center for estate tax returns). The IRS will process the return, assess any tax, and issue any communications or audits. In context, think of the IRS as the “tax referee” – they make sure the estate tax laws (set by Congress) are applied and the correct tax is paid. The IRS is a bureau of the U.S. Treasury Department.

U.S. Treasury Department

The Department of the Treasury is the executive department of the federal government that oversees national finances and revenue. The IRS is part of Treasury. Treasury issues regulations for tax laws and ultimately receives the money collected from taxes like the estate tax. When estate taxes are paid via Form 706, those funds go into the U.S. Treasury. While the IRS handles the day-to-day of tax collection, Treasury is the broader entity ensuring the financial operations of the government. You might hear “Treasury regulations” referenced, which are official rules that interpret the tax code, guiding how Form 706 should be filled out.

Unified Credit (Unified Estate and Gift Tax Credit)

The unified credit is basically the tax credit that makes the estate tax exclusion work. It’s called “unified” because it applies to both gift taxes and estate taxes as one combined credit. The unified credit amount is set such that it offsets the tax on the exempt amount of assets. For example, if the exclusion is $12.92 million (2023), the estate tax on $12.92M would be roughly $5,113,800 – so the unified credit is around $5,113,800, wiping out the tax on that amount. Every taxpayer has this credit to use during life or at death. If you use some for gifts, you have less remaining for your estate. In practice, people often use “unified credit” interchangeably with “exemption” or “exclusion”, but technically the credit is the tax-equivalent and the exclusion is the dollar value of assets shielded. The key idea: unified credit = your lifetime coupon that spares a chunk of wealth from estate/gift tax.

Estate Tax Exclusion (Basic Exclusion Amount)

Also known as the applicable exclusion or just “exemption”, this is the amount of assets you can transfer (during life or at death) without incurring federal estate/gift tax, thanks to the unified credit. For instance, the estate tax exclusion was $5 million (plus inflation) for many years, now about $12–13 million. If your estate’s net value is below this amount, it’s excluded from tax. When we say an estate is “taxable”, we mean its value exceeds the exclusion. This number adjusts for inflation and is set by law. Important: after 2025, the exclusion is slated to drop – essentially cutting in half (back to a base of $5M, which by 2026 with inflation might be around $6–7M). So the exclusion is a moving target; always check the year-of-death value.

Portability

Portability refers to the ability of a surviving spouse to claim the unused estate tax exclusion of their predeceased spouse. We covered this in depth above. The term comes from being able to “port” (carry over) the exemption. The surviving spouse’s estate can then use this additional exclusion, the DSUE (Deceased Spousal Unused Exclusion), on top of their own. Portability must be elected on a Form 706 filed for the first spouse. It’s a relatively new feature (first introduced in 2011 and made permanent in 2013). Before portability, if a spouse died without tax planning (like bypass trusts) and didn’t use their exemption, it was gone. Now, portability is like a safety net for couples. Just remember it only applies between married U.S. citizen spouses and only for estate/gift tax (not GST tax).

Deceased Spousal Unused Exclusion (DSUE)

This is the formal term for the amount of unused exemption that one spouse can leave to the other via portability. If a husband died and used $3M of his $13M exclusion (for taxable gifts or part of his estate), the remaining $10M would be his DSUE. If properly elected, the wife gets that $10M DSUE added to her own exclusion. The Form 706 will have a worksheet to calculate DSUE. When the surviving spouse later files their own Form 706, there’s a place to enter any DSUE received. It’s important for executors to accurately compute this on the first death’s return.

Generation-Skipping Transfer (GST)

A generation-skipping transfer is a gift or inheritance that “skips” the immediate next generation to benefit a younger generation (e.g., grandchild) or someone 37.5+ years younger than the donor (not counting spouses). The government imposes the GST tax to ensure a second layer of tax isn’t avoided by skipping a generation (since normally wealth would be taxed in each generation at death). GST tax is separate from the estate tax but at the same 40% rate. Each person has a GST exemption equal to the estate exemption ($12–13M).

They can allocate this to generation-skipping gifts or bequests to shield them from GST tax. On Form 706, Schedule R is where GST matters are handled. For example, if someone left $5M in a trust that will eventually go to grandkids, they might allocate $5M of their GST exemption to that trust in their Form 706, so that when the trust pays out to grandkids, there’s no GST tax. If they didn’t, the trust could face a 40% hit. Key point: GST planning is highly technical, and Form 706 is where final GST allocations are often made.

Schedule R (Form 706)

Schedule R is a section of Form 706 specifically for computing Generation-Skipping Transfer tax and allocating GST exemption for transfers made at death (as opposed to during life, which would be on a gift tax return). If the decedent had no generation-skipping transfers, Schedule R isn’t needed. But if they did (like grandkid bequests or certain trusts), the executor must fill out Schedule R. Part 2 of Schedule R is where you list direct skips (transfers to skip-persons) and calculate GST tax due, if any, after exemptions. There’s also Schedule R-1, which is a form you send to any trust or other person who might have to pay a GST tax due to the decedent’s death, notifying them of their obligation. In practice, Schedule R often involves allocating the decedent’s GST exemption optimally to cover specific gifts or trusts. If done right, many estates can avoid GST tax by using the exemption.

Form 8971 (Information Regarding Beneficiaries and Schedule A)

Form 8971 is an IRS form that executors of estates must file (and send to beneficiaries) when a Form 706 is filed and the estate had assets that needed reporting for basis purposes. It was introduced as part of the “basis consistency” law around 2015. The concept is: The value of assets reported on the estate tax return should be the same value used by beneficiaries as their tax basis for future capital gains calculations. To enforce this, Form 8971 requires the executor to list each beneficiary and identify which assets (with their estate values) each beneficiary is receiving. Each beneficiary gets a Schedule A from the executor listing the assets they inherited and the values assigned. The executor sends Form 8971 (with all Schedule As) to the IRS, and separate Schedule A pages to each beneficiary. This filing is generally due within 30 days of filing the Form 706.

However, there are exceptions: If the estate is below the tax threshold and filed 706 only for portability (or only for GST allocation) and no tax is due, current regulations do not require Form 8971. In other words, basis consistency only applies to estates where a federal estate tax return was required due to size or tax owed. If Form 706 was optional (e.g., for portability) and the estate owes no tax, the executor might skip Form 8971 (though they should still inform beneficiaries of asset values). In any case, beneficiaries will use the final value reported as their asset’s basis. Think of Form 8971 as the estate’s way of “locking in” the fair market values for the heirs and IRS, to prevent any post-death funny business like heirs claiming a higher basis later.

So if you file a taxable estate return, don’t forget Form 8971 and Schedule A’s – failing to file those can trigger penalties. It’s part of the compliance package now.

Schedule A (Schedule A vs. Schedule A’s)

Be careful: Schedule A in Form 706 is the schedule for real estate in the estate. But Schedule A of Form 8971 is a different animal – it’s the list of inherited assets for each beneficiary. When someone mentions “Schedule A” in an estate context, it’s usually clear by context whether they mean the 706 schedule or the 8971 schedule. Just a note to avoid confusion: on Form 706, you will fill out Schedules A through I (and others) to value categories of assets. On Form 8971, you’ll prepare a Schedule A for each heir. Same letter, different purpose.

Fiduciary (Executor/Administrator)

The executor (or administrator if no will) is the person legally responsible for managing the estate and filing tax returns like Form 706. In IRS lingo, this is the fiduciary of the estate. The executor can be held personally liable for taxes if they distribute assets to heirs before paying the IRS, so it’s not a role to take lightly. When filling Form 706, the executor signs under penalty of perjury that the return is true, and they are the contact for any IRS follow-ups. If there are co-executors, any one of them can sign, but all are responsible. An executor should ensure they have access to the decedent’s financial records and can secure professional assistance as needed to fulfill their duty.

Gross Estate vs. Taxable Estate

Just to reiterate since these terms are fundamental: the Gross Estate is the total value of everything before deductions. The Taxable Estate is what’s left after subtracting deductions (marital, charitable, debts, etc.) – essentially the portion that is actually subject to tax. Then after that, you subtract the unified credit to determine what tax, if any, is payable. Many casual discussions conflate “estate” with “taxable estate,” but on Form 706 they are very distinct numbers. For example, an estate might have a gross estate of $15M, deductions of $5M, yielding a taxable estate of $10M – which might be entirely covered by the credit if under the exemption.

IRC Section 6166 and 2032A (Special Elections)

Just to tie up those earlier mentioned provisions: Section 6166 is the code section that allows deferral of estate tax payments for certain business-heavy estates. If more than 35% of the estate is a closely-held business, the executor can elect to pay the estate tax in up to 10 (or 15) installments. The first installment can be interest-only for 5 years. This election is made on Form 706 and requires paying interest annually. It prevents fire-sales of family businesses just to pay tax. Section 2032A is the code section for special-use valuation (like the farm example). It lets certain real property (farm or closely-held business real estate) be valued at its current use rather than highest value, up to a certain reduction limit (around $1.31M reduction max in recent years). The heirs must continue the qualified use (farming, etc.) for 10 years or pay back the tax savings (a recapture tax). This election is also on Form 706 (there’s a separate schedule and agreement that heirs must sign and attach). These aren’t everyday terms unless you’re dealing with a farm or business estate, but they are part of the estate tax lexicon and important tools in the right cases.

With these definitions, you should feel more comfortable with the “language” of Form 706 and estate taxation. One of the intimidating parts of this topic is just understanding the terminology – now you have a handy glossary of the main concepts.

FAQs: Straight Answers to Common Form 706 Questions

Finally, let’s address some frequently asked questions that often pop up (the kind of questions we see on forums, from clients, and yes, even on Reddit). We’ll keep it brief and clear:

Q: Do all estates have to file IRS Form 706?
A: No. Only estates above the federal exemption threshold (e.g., $12.92M for 2023 deaths, $13.61M for 2024) are required to file. Exception: estates under the threshold may file voluntarily for portability or other elections, but it’s not mandatory if no tax and no special election needed.

Q: Is there any tax due if an estate is below the exemption?
A: No. If the taxable estate (after deductions) is under the exclusion amount, there is $0 federal estate tax due. The unified credit covers it fully. You might still file a return for other reasons (like to save the exemption for a spouse), but no tax is owed to the IRS in that case.

Q: Does life insurance count as part of the estate?
A: Yes, if the decedent owned the policy or had certain control over it. The full death benefit is included at fair value. However, if the policy was owned by someone else or an irrevocable trust (and the decedent had no incidents of ownership in the last 3 years), it can be excluded.

Q: What’s the estate tax rate?
A: The top federal estate tax rate is 40% on the amount above the exemption. There are lower brackets (18% starting at $0, etc.), but because of the large credit, effectively any taxable estate beyond the first few million is taxed at 40%. Many states have their own rates (typically 10-16% for state estate taxes).

Q: Can Form 706 be filed electronically?
A: No, currently the IRS requires estate tax returns to be paper-filed (snail mail). You’ll have to print it out and send it to the IRS (with payment, if any, or to a specified address depending on whether a payment is enclosed). As of 2025, e-filing for Form 706 is not available.

Q: Is Form 706 the same as the estate’s income tax return?
A: No. Form 706 is a one-time estate tax return on the transfer of assets at death. Form 1041 is the annual income tax return for an estate or trust (reporting income earned by the estate during administration). They are entirely separate filings. Many estates will file both: Form 706 for the estate tax (if needed) and Form 1041 for any income (like interest, dividends, or capital gains the estate generates before distributing assets).

Q: If my spouse died and our estate is small, should I still file Form 706?
A: Yes, if you want to elect portability of the unused exemption. Even if no tax is due now, filing Form 706 allows you to carry over your spouse’s unused exclusion which could save taxes when you pass. If you’re certain your own estate will remain under the limit (and you won’t remarry someone wealthier), you might skip it, but many advisors recommend filing as a precaution.

Q: Are gifts I make before death subject to estate tax too?
A: Large lifetime gifts (over the annual exclusion) reduce your estate tax exemption. They aren’t taxed twice, but they use up part of the unified credit. When you pass, the amount of taxable gifts you gave is added to your estate for calculating the tax. In short, you don’t escape the tax by gifting – you just chip away at the same exemption.

Q: Will the estate tax exemption really drop in 2026?
A: Yes, under current law, the doubled exemption sunsets after 2025. It will revert to the prior law’s base ($5 million per person, adjusted for inflation from 2011). That will likely be around $6 to $7 million. Congress could change this before 2026, but as of now, estates of people dying in 2026 and beyond could face a much lower exemption. This makes portability and other planning now potentially more valuable.

Q: If an estate is subject to state estate tax, do I report that on Form 706?
A: You will deduct any state estate tax paid on Form 706 (Schedule S), which can slightly reduce the federal taxable estate. But you do not calculate the state tax on the federal form. State taxes are handled on the state’s own return. So, file the state estate tax return with your state and the federal Form 706 with the IRS, and cross-reference the deduction if applicable.

Q: Who actually pays the estate tax – the estate or the heirs?
A: The estate itself pays the estate tax to the IRS, out of the estate’s funds, before distributions to heirs. Beneficiaries receive their inheritance net of any estate tax. (Inheritance tax, conversely, is paid by the recipient to the state, but that’s separate.) In some cases, if an estate is illiquid, assets might be sold or even distributed in-kind and arrangements made for heirs to contribute to the tax, but legally it’s the estate’s obligation.

Q: If an estate owes estate tax, will the heirs also owe income tax on their inheritance?
A: Generally, no – inheritances are not considered income for federal income tax purposes, so heirs don’t pay income tax on what they inherit. They also usually get a step-up in basis on assets, reducing capital gains tax if they sell. However, if an estate distributes untaxed income (like from an IRA or earned income), that could carry out to heirs via Form 1041 as income in respect of a decedent. But the estate tax itself doesn’t make an inheritance taxable income. Estate tax and income tax are separate.

Q: How long does the IRS have to audit or question a Form 706?
A: The IRS generally has 3 years from the filing date to audit an estate tax return (the standard statute of limitations for tax returns). However, if the estate undervalued an asset by more than 25%, they can go up to 6 years. And there’s no limit if fraud is involved. Usually, if you don’t hear anything in 3 years, you’re in the clear. It’s a good practice to keep records at least that long (and honestly, given the complexity, maybe longer in case questions arise).