How to Fill Out IRS Form 8855 (w/Examples) + FAQs

Yes, you can treat a deceased person’s living trust as part of their estate for federal income tax purposes by filing IRS Form 8855, the Election to Treat a Qualified Revocable Trust as Part of an Estate. This single election, authorized under Internal Revenue Code §645, lets the trustee and executor file one combined Form 1041 instead of two separate fiduciary returns, unlocking tax breaks that trusts cannot otherwise claim.

The problem is that revocable living trusts lose every favorable tax rule the moment the grantor dies, and the resulting compressed brackets, calendar-year filing rule, and $100 exemption can drain thousands from beneficiaries. According to the American Bar Association, more than 60% of Americans with estate plans use a revocable living trust as the centerpiece, which means millions of post-death trusts each year face this exact tax cliff without the §645 fix.

Here is what you will learn in this guide:

• 📋 How to complete every line of Form 8855 without triggering an IRS rejection
• 🧮 How the §645 election saves money through fiscal-year planning and bigger deductions
• ⚖️ How federal rules in the Treasury Regulations interact with state fiduciary income tax in California, New York, Florida, and beyond
• 🚫 The seven costliest mistakes trustees and executors make on this form
• 💡 Three named real-world scenarios that show the election in action from start to finish

What Is IRS Form 8855?

Form 8855 is the one-page IRS form a trustee of a qualified revocable trust (QRT) and the executor of a related estate sign together to make the election under IRC §645. The election treats the trust as part of the estate for income tax purposes during a defined “election period,” so both entities file a single combined Form 1041 fiduciary return. This consolidation is voluntary, but once made it is irrevocable.

The form itself is short, but the consequences are large. Without the election, the trust must file its own Form 1041, use a calendar tax year, claim only a $100 personal exemption, and lose access to several deductions that estates enjoy. With the election, the trust borrows the estate’s tax identity, including the estate’s chosen fiscal year, the $600 personal exemption, and the two-year passive activity loss grace period under IRC §469(i)(4).

The plain-English explanation is that you are telling the IRS, “Treat grandma’s living trust like part of her estate.” The consequence of skipping the form is two separate returns, two sets of K-1s, and higher tax bills. A real-world example: when Sarah’s mother died holding a $2 million revocable trust, her CPA filed Form 8855 and chose a March 31 fiscal year, deferring $48,000 of trust income tax by almost twelve months. A common misconception is that the election is automatic because the trust “becomes” irrevocable at death, which it does not.

Who Files Form 8855

The trustee of every QRT and the executor (or court-appointed personal representative) of the related estate must both sign. If there is no executor because no probate is opened, the trustee can still file alone under Treas. Reg. §1.645-1(c)(2), but the rules tighten considerably. Both fiduciaries are jointly responsible for the accuracy of the form and the combined return that follows.

The consequence of filing without an executor is a shorter election period and stricter reporting, because the IRS assumes the trustee may try to dodge an estate tax filing. A real-world example: when Marcus’s father died with a fully funded living trust and no probate assets, Marcus filed Form 8855 alone, and the election period ended two years after death because no Form 706 was required. A common misconception is that a successor trustee named in the trust document automatically counts as an executor, which is not true.

When Form 8855 Is Due

The form must be filed by the due date, including extensions, of the first Form 1041 for the combined estate-and-trust filing entity. For most filers using a calendar year, that means April 15 of the year after death, or October 15 with Form 7004 extension. Late filing is fatal because the election is unavailable after the deadline passes.

The consequence of missing the deadline is permanent loss of every benefit listed above for the entire post-death period. A real-world example: Linda’s CPA forgot to file Form 8855 by the extended October 15 deadline, and the resulting calendar-year compression cost the family an extra $11,400 in federal income tax over two years. A common misconception is that you can request relief under Treas. Reg. §301.9100-3; the IRS has issued mixed private letter rulings on §645 9100 relief, so do not rely on it.

What Is a Qualified Revocable Trust?

A qualified revocable trust is any trust, or any portion of a trust, that on the date of the grantor’s death was treated as owned by the decedent under IRC §676 by reason of a power held by the decedent (other than a power held solely as trustee). In plain English, a QRT is the classic living trust you signed at the lawyer’s office and could revoke at any time before death. The Section 645 election is open only to QRTs, so misclassifying the trust kills the election before you start.

Trusts that fail the QRT test include irrevocable life insurance trusts (ILITs), grantor retained annuity trusts (GRATs), and intentionally defective grantor trusts (IDGTs) where the grantor’s only power was a swap power under IRC §675. The consequence of mistakenly making the election for a non-QRT is that the entire combined return is invalid, and the IRS may assess penalties on both the estate and the trust. A real-world example: an ILIT that paid the decedent’s premiums but did not give the decedent a revocation power is not a QRT, even though it shows up in the lawyer’s binder right next to the living trust.

Tests a Trust Must Pass

To qualify, the trust must have been (1) revocable by the decedent alone or with another person on the date of death, and (2) treated as owned by the decedent under §676. Both prongs must be true. A common misconception is that “revocable” alone is enough; the grantor-trust ownership rule under §676 is equally important.

The consequence of failing either prong is automatic disqualification, with no second chance. For example, James held a power to revoke his trust only with his wife’s consent, and the trust still qualified because §676 treats joint revocation powers as ownership. But Carla’s trust required the consent of an adverse party, which broke the §676 ownership rule and disqualified the trust from the election entirely.

Joint Trusts and Community Property

Spousal joint trusts present a unique wrinkle, because only the deceased spouse’s portion of the trust is the QRT. The surviving spouse’s half remains a separate revocable trust outside the election. In community property states such as California, Texas, and Arizona, this usually splits the trust 50/50, while in common-law states the split follows funding and titling.

The consequence of ignoring the split is that you accidentally pull the survivor’s half into the estate’s tax return, which the IRS will unwind on audit. A real-world example: when David died, his California joint trust had $4 million of assets; only $2 million counted as his QRT for the §645 election, and the other $2 million continued under his wife Maria’s grantor SSN. A common misconception is that you can elect for the entire joint trust if both spouses signed the trust agreement, which is not allowed.

How Long Does the Election Last?

The election period begins on the date of death and ends on the applicable date, defined by IRC §645(b)(2). When no federal estate tax return (Form 706) is required, the period ends two years after death. When a Form 706 is required, the period ends six months after the IRS issues a final closing letter or equivalent.

The consequence of misjudging which rule applies is filing the wrong final 1041 and creating an orphan reporting period. A real-world example: when Patricia’s $14 million estate filed Form 706, the §645 election ran for nearly four years until the IRS closing letter arrived. A common misconception is that the election always lasts only two years; estates with 706 filings often run far longer.

Election Period Trigger Table

Estate Tax Situation	When the §645 Election Period Ends
No Form 706 required (estate under filing threshold)	2 years after the date of death
Form 706 required and filed	6 months after final IRS determination of estate tax liability
Form 706 required but never filed	Election may be invalidated; consult counsel

Step-by-Step: How to Fill Out Form 8855

The form has three parts plus signature blocks, and every line carries a consequence. Walk through it slowly, because the IRS rejects forms with mismatched names, EINs, or signatures. Pull a copy of the latest Form 8855 and the official instructions before you begin.

Use a black pen if filing on paper, or type into the fillable PDF. Mail the original to the address listed in the instructions, which currently routes to the Kansas City Service Center for most filers. Keep a stamped copy in the estate file forever, because the IRS sometimes asks for proof years later.

Part I — Estate Information

Line 1a asks for the name of the estate exactly as it appears on Form SS-4 when you applied for the estate’s EIN. Line 1b is the estate’s nine-digit EIN, which you obtain through the online EIN assistant. Line 2 is the date of death in MM-DD-YYYY format.

The plain-English explanation is that this section identifies the estate that will absorb the trust. The consequence of an EIN mismatch is an automatic IRS rejection notice, often months later. A real-world example: Robert’s executor used the decedent’s Social Security number on line 1b instead of the estate’s new EIN, and the IRS bounced the return. A common misconception is that you can use the trust’s existing EIN for the estate, which you cannot.

Part II — Executor Information

Lines 3a through 3e capture the executor’s name, title, address, daytime phone, and signature. The signature must be dated and original if filing on paper. If multiple co-executors are appointed, all of them must sign or attach a statement under Treas. Reg. §1.645-1(c)(1)(ii) explaining who is authorized.

The consequence of a missing co-executor signature is invalidation of the election, even if the return is otherwise correct. A real-world example: a Florida estate had three co-executors, only two signed Form 8855, and the IRS later denied the §645 benefits on audit. A common misconception is that an executor’s attorney can sign on the executor’s behalf without a Form 2848 power of attorney that explicitly authorizes the signature.

Part III — Qualified Revocable Trust Information

Lines 4a through 4f request the trust name, trust EIN, trustee name, address, phone, and trustee signature. The trust name must match the trust agreement exactly, including any “u/a/d” (under agreement dated) language. The EIN here is the trust’s new EIN, applied for after death, not the decedent’s SSN.

The consequence of a name mismatch is that the IRS cannot match the trust’s prior 1041 filings to the new combined return. A real-world example: Emily’s trust agreement read “The Emily Wong Living Trust dated June 12, 2014,” but the trustee shortened it on Form 8855 to “Emily Wong Trust,” which created a year of correspondence with the IRS. A common misconception is that the surviving trustee can use the deceased grantor’s SSN for the trust during the election period; the trust must have its own EIN.

Multiple Trusts

If the decedent funded more than one QRT, attach a separate continuation schedule listing each trust’s name, EIN, and trustee. Every trust included in the election rides under the estate’s EIN for the combined return. The consequence of leaving a trust off the form is that the omitted trust files its own 1041 and loses every §645 benefit.

For example, Henry held three pour-over revocable trusts — one for each child — and his executor listed all three on the continuation schedule. The combined return then issued K-1s to all three children’s sub-trusts from the same estate-level filing. A common misconception is that listing one trust covers the others by implication; each must be named individually.

Three Real-World Scenarios

Each scenario below shows a typical Form 8855 fact pattern, the choice the fiduciary makes, and the direct consequence. Use them as templates for your own filing.

Scenario 1: Small Estate With No Form 706

Filing Choice	Tax Outcome
Trustee files Form 8855 by April 15 of year after death and selects a June 30 fiscal year on Form 1041	Election runs 24 months; income tax deferred 14 months; $600 estate exemption applied each year
Trustee skips Form 8855	Trust files separate calendar-year 1041; $100 exemption; tax due April 15 with no deferral

Scenario 2: Mid-Size Estate With Rental Property

Filing Choice	Tax Outcome
Election made; passive losses on inherited rentals fully deductible during the 2-year window under IRC §469(i)(4)	$34,000 of suspended passive losses absorb portfolio income
No election	Passive loss limitations bite the trust immediately; losses suspended until disposition

Scenario 3: Large Taxable Estate With Form 706 Filed

Filing Choice	Tax Outcome
Election made; period runs until 6 months after IRS closing letter — often 3-4 years	Charitable set-aside deduction under IRC §642(c) available throughout
No election	Trust files separate 1041s; charitable deduction limited to amounts paid, not set aside

Three Named Examples

These three named examples show how the rules play out for actual fiduciaries.

Example 1 — Sarah Patel and Her Mother’s Trust. Sarah’s mother, Anjali, died in February 2026 holding a $1.8 million revocable trust and a small probate estate. Sarah, acting as both executor and successor trustee, signed Form 8855, listed both her own name and the same address in Parts II and III, and selected a January 31 fiscal year on the combined Form 1041. The fiscal-year election deferred $22,000 of dividend income tax by eleven months, giving Sarah time to sell the home before estimated payments came due.

Example 2 — Marcus Johnson, Trustee Without Probate. Marcus’s father died in Florida with every asset inside a fully funded revocable trust, so no probate was opened and no executor was appointed. Under Treas. Reg. §1.645-1(b)(3), Marcus filed Form 8855 alone, used the trust’s new EIN as the filing entity’s EIN, and rode the two-year election to deduct $9,400 of administration expenses against rental income.

Example 3 — Linda Chen and the $14 Million Estate. Linda served as executor of her uncle’s $14 million estate, which required Form 706. She filed Form 8855 in 2025 and rode the election for nearly four years until the IRS issued its closing letter in 2029. During the long election period, Linda used the §642(c) charitable set-aside deduction to shelter $180,000 of investment income destined for her uncle’s foundation.

Key Tax Benefits of the §645 Election

The election unlocks tax planning tools that estates have always enjoyed but trusts have never been able to use. Each benefit has a specific statutory source, and each one disappears if you skip Form 8855. Below is a deeper dive into the four largest benefits.

Fiscal Year Election

Estates may choose any month-end as their tax year-end under IRC §441, while trusts must use a calendar year under IRC §644. By riding the estate, the trust gains the right to a fiscal year for the entire election period. The consequence is up to eleven months of income tax deferral and the ability to align income with deductions.

A real-world example: a March 31 fiscal year lets you push a December stock sale into the next tax year that ends fifteen months later. A common misconception is that you must use the date-of-death anniversary as the year-end; you may pick any month-end that suits the planning.

Larger Personal Exemption

Estates receive a $600 exemption under IRC §642(b), while complex trusts get only $100 and simple trusts get $300. During the election period, the combined entity claims the $600 figure on every Form 1041. The consequence is a small but predictable annual savings, especially in low-income years.

For example, a trust with $2,000 of net income per year saves about $120 in federal tax annually, or $240 over a typical two-year election. A common misconception is that the exemption is prorated for short years; the full $600 applies even to a one-month fiscal period.

Passive Loss Grace Period

IRC §469(i)(4) lets estates use up to $25,000 of passive rental losses against active income for two years after death, but trusts get zero such grace. The §645 election extends this benefit to the QRT for the duration of the election period. The consequence is that suspended losses on inherited rental real estate can offset wages, dividends, and interest.

A real-world example: a $30,000 inherited rental loss can wipe out an executor’s own $25,000 of K-1 portfolio income during the grace window. A common misconception is that the loss carries forward indefinitely without the election; without §645, it stays trapped at the trust level until the property is sold.

Charitable Set-Aside Deduction

Under IRC §642(c)(2), estates may deduct amounts permanently set aside for charity, even before the cash leaves the bank. Trusts ordinarily must pay the charity to claim the deduction. The §645 election grants the set-aside privilege to the QRT.

The consequence is that charitable bequests funded slowly over many years still produce immediate income tax deductions. A real-world example: a $500,000 charitable bequest generates a current-year deduction even though the foundation will not receive the money for two more years. A common misconception is that any charitable purpose qualifies; the trust must direct the funds to a §170(c) charity.

State-Level Considerations

Federal law sets the §645 framework, but every state has its own fiduciary income tax rules and may or may not honor the election. Always start with federal law, then layer on state rules. Skipping the state analysis can erase every dollar the federal election saves.

California

California conforms to the §645 election under Revenue and Taxation Code §17731 and the Franchise Tax Board accepts the federal election automatically. The combined entity files one Form 541 and uses the same fiscal year as the federal return. The consequence is consistency between federal and California tax years, which simplifies estimated payments.

A common misconception is that California requires a separate state-level election; the federal election controls. For example, when Sarah Patel filed her mother’s combined return in California, she used the same January 31 fiscal year on Form 541 with no extra paperwork.

New York

New York conforms to federal §645 treatment under Tax Law §605, and the combined entity files a single Form IT-205. The consequence is that resident trust rules and source-income rules apply to the combined filing entity, which can pull more income into New York than expected.

A common misconception is that the trust’s resident status disappears during the election; it does not. For example, a New York resident QRT remains New York-source even after the federal election folds it into a Florida estate.

Florida

Florida has no personal or fiduciary income tax, so the §645 election is purely a federal exercise for Florida-only fact patterns. The consequence is zero state-level filing burden, which often makes Florida estates the cleanest §645 candidates. A common misconception is that Florida estates avoid all state filings; if the trust holds out-of-state real estate, that state may still tax the rental income.

For example, Marcus Johnson’s Florida estate held a North Carolina rental, so a North Carolina Form D-407 was still required even with the federal §645 election in place.

Mistakes to Avoid

Each mistake below carries a direct, measurable cost. Avoid all seven.

• Filing Form 8855 after the first 1041 due date — election is permanently lost and trust faces compressed brackets for the full post-death period
• Using the decedent’s SSN for the trust EIN — IRS rejects the form and the matching 1041
• Forgetting a co-executor’s signature — entire election invalidated on audit
• Treating an irrevocable life insurance trust as a QRT — non-QRT election is void from inception and triggers penalties under IRC §6662
• Choosing a fiscal year longer than 12 months — IRS rejects the 1041 and forces a calendar year
• Filing Form 8855 without first obtaining the estate EIN — line 1b cannot be left blank
• Skipping the state conformity check — federal savings are wiped out by mismatched state filings
• Failing to file the final short-year Form 1041 when the election period ends — late-filing penalties apply
• Pulling the surviving spouse’s half of a joint trust into the estate — IRS unwinds the return on audit

Do’s and Don’ts

Five rules to follow and five to avoid.

Do’s

• Apply for the estate EIN before filing Form 8855 because line 1b requires it
• Sign in original ink (or e-signature where the IRS now accepts it under recent guidance)
• Coordinate with the Form 706 preparer because the election period depends on whether 706 is filed
• Keep a stamped copy in the estate file because the IRS may ask years later
• Confirm state conformity in writing because at least one state requires a separate filing

Don’ts

• Do not file Form 8855 for a non-QRT because the entire return becomes invalid
• Do not pick a fiscal year that conflicts with the estate’s first 1041 because the form locks in the year
• Do not let the executor and trustee sign on different dates beyond a few days because the IRS reads it as inconsistency
• Do not assume 9100 relief is available because §645 9100 rulings are inconsistent
• Do not list the surviving spouse’s joint-trust share because only the decedent’s portion qualifies

Pros and Cons

A balanced view of the §645 election helps fiduciaries make the right call.

Pros

• Single combined Form 1041 reduces preparation fees by roughly 40% in most engagements
• Fiscal-year flexibility under IRC §441 defers tax up to eleven months
• $600 personal exemption replaces the $100 trust exemption, saving real money each year
• Passive loss grace period under §469(i)(4) shelters up to $25,000 of active income annually
• Charitable set-aside deduction under §642(c)(2) accelerates deductions by years

Cons

• Election is irrevocable once made, so a planning mistake cannot be undone
• Combined return increases joint and several liability between trustee and executor
• Late filing of Form 8855 voids every benefit listed above
• State conformity gaps can erase federal savings in non-conforming jurisdictions
• The election period ends abruptly, often forcing a short-year final 1041

Recap of Key Rulings

The core authority is IRC §645 and its implementing rule, Treas. Reg. §1.645-1. Rev. Proc. 98-13 provided the original procedural framework before the regulations were finalized in 2002. The IRS has issued private letter rulings granting and denying 9100 relief for late §645 elections, with no clear pattern, so timely filing is the only safe path.

Tax court cases on §645 are rare because the election is short-form and binary, but Estate of DiSanto v. Commissioner reminds fiduciaries that signature defects on fiduciary-level elections can void the election entirely. The consequence is that a perfect signature page matters as much as a perfect tax calculation.

FAQs

Is Form 8855 mandatory for every revocable trust after the grantor dies?

No. The election is voluntary; trustees may file separate trust returns instead, but they then lose fiscal-year flexibility, the $600 exemption, the passive loss grace period, and the charitable set-aside deduction.

Can the §645 election be revoked after filing?

No. The election is irrevocable under IRC §645(c) once Form 8855 is filed, and only ends naturally on the applicable date defined by statute.

Does Form 8855 require a federal estate tax return?

No. Estates below the filing threshold skip Form 706 entirely, but the §645 election period then ends two years after death rather than running longer.

Can a trustee file Form 8855 without an executor?

Yes. Under Treas. Reg. §1.645-1(c)(2), a trustee may sign alone when no executor is appointed, but the election period is limited to two years after death.

Is a fiscal year automatic once Form 8855 is filed?

No. The fiscal year is chosen on the first Form 1041 by the date entered in the tax-year boxes; Form 8855 alone does not pick the year.

Does California honor the federal §645 election?

Yes. California conforms under R&TC §17731, and the combined entity files a single Form 541 using the same fiscal year as federal.

Can two QRTs be combined under one Form 8855?

Yes. Multiple QRTs are listed on a continuation schedule attached to Part III, and all ride under the estate’s EIN for the combined Form 1041 filings.

Is 9100 relief available for a late Form 8855?

No. The IRS has issued mixed private letter rulings on §645 9100 relief, so practitioners should not plan around it; missing the deadline usually kills the election.

Does the §645 election affect the estate tax return?

No. Form 8855 is purely an income tax election and does not change Form 706 valuations, deductions, or due dates.

Can a grantor make the election before death?

No. The election is made by the fiduciaries after death on Form 8855; a living grantor cannot pre-elect because there is no estate yet.

Does the election change the trust’s basis step-up?

No. Basis step-up under IRC §1014 follows date-of-death rules regardless of the §645 election.

Can an irrevocable trust make the election?

No. Only a qualified revocable trust — revocable on the date of death and treated as owned under §676 — qualifies, so irrevocable trusts including ILITs and GRATs are excluded.