What Is Form 1041? Income Tax Return for Estates and Trusts

Form 1041 is the U.S. Income Tax Return for Estates and Trusts. A fiduciary — the executor of an estate, the trustee of a trust, or a bankruptcy trustee — files it to report the entity’s income, deductions, gains, losses, and credits, and to determine how much tax the entity owes versus how much passes through to beneficiaries.¹ Because estates and trusts hit the top 37% federal bracket at just $16,000 of taxable income in 2026, how the return is prepared, and how much income is distributed to beneficiaries, drives the overall tax bill.

Who Has to File

Filing turns on the type of entity and how much income it earned during the year.

Estates

A domestic decedent’s estate must file Form 1041 if it had gross income of $600 or more during the tax year, or if any beneficiary is a nonresident alien, regardless of income.² The estate is a separate taxable entity from the date of death until assets are distributed. Interest, dividends, rent, and business profits earned by estate assets during that period belong to the estate for tax purposes.

Trusts

A domestic trust must file if it has any taxable income at all, or if its gross income reaches $600 or more even when taxable income is zero.² The trust’s category matters:

A simple trust must distribute all income to beneficiaries each year and cannot make charitable contributions. Personal exemption: $300.
A complex trust may accumulate income, make charitable contributions, or distribute principal. Personal exemption: $100.
A grantor trust is controlled by the person who created it. Income is generally reported on the grantor’s personal Form 1040, though an informational Form 1041 may still be required.

Bankruptcy Estates

When an individual files under Chapter 7 or Chapter 11, the bankruptcy estate becomes a separate taxable entity. The bankruptcy trustee or debtor-in-possession must file Form 1041 if gross income meets the filing threshold, which was $15,750 for tax years beginning in 2025 and is adjusted annually for inflation.³

2026 Tax Rates on Retained Income

Estates and trusts are taxed on income they keep rather than pass out to beneficiaries. The rate schedule is compressed compared with individuals. For 2026:⁴

10% on taxable income up to $3,300
24% from $3,301 to $11,700
35% from $11,701 to $16,000
37% above $16,000

A single individual does not reach the 37% bracket until income exceeds roughly $626,000. The gap creates a strong incentive to move income out to beneficiaries in lower brackets rather than let it accumulate inside the entity.

Capital Gains and the Net Investment Income Tax

Long-term capital gains and qualified dividends earned by an estate or trust are taxed at preferential rates for 2026: 0% up to $3,300, 15% from $3,300 to $16,250, and 20% above $16,250.⁴

On top of regular income tax, the 3.8% Net Investment Income Tax may apply. For 2026, the NIIT applies to the lesser of the entity’s undistributed net investment income or the amount by which adjusted gross income exceeds $16,000.⁴ Distributing investment income before year-end can reduce or eliminate this additional tax.

Deductions That Reduce the Entity’s Tax

Income items look much like an individual’s return: taxable interest, ordinary dividends, capital gains from asset sales, business income, rental income, and royalties.¹ Several deductions bring taxable income down:

Fiduciary fees paid to the executor or trustee for administering the entity during the year.
Professional fees paid to attorneys, accountants, and tax preparers for work on the entity’s administration. Tax return preparation costs are fully deductible.²
Charitable contributions, which complex trusts and estates can deduct if the governing document authorizes charitable giving.
The income distribution deduction, described below.

The Income Distribution Deduction

When the entity distributes income to beneficiaries, it claims an income distribution deduction that reduces its own taxable income. The beneficiaries then report their share of the distributed income on their personal returns. That prevents the same dollar from being taxed twice, once at the entity level and again at the beneficiary level.² Given how compressed the entity’s brackets are, shifting income out through distributions is often the main tax-planning lever available.

Personal Exemption

Every estate or trust deducts a personal exemption. The amounts are set by statute and do not adjust for inflation:

Estates: $600
Simple trusts (required to distribute all income currently): $300
Complex trusts: $100

A qualified disability trust is the exception, with a $5,300 exemption for 2026 not subject to phaseout.⁴

How to File

Get an EIN

Before filing, the fiduciary must obtain an Employer Identification Number for the estate or trust. The EIN is the entity’s tax ID, separate from the deceased person’s Social Security number or the fiduciary’s own tax ID. You can apply online through the IRS website, by fax, or by mail.

Pull the Records Together

Completing the return requires:

1099 forms for interest, dividends, and other income earned by the entity
Records of capital gains and losses from asset sales
Receipts for deductible expenses (fiduciary, legal, and accounting fees)
Names, addresses, and tax identification numbers for every beneficiary
Records of all distributions made during the year

Complete the Return

Page one of Form 1041 identifies the entity type: decedent’s estate, simple trust, complex trust, grantor trust, or bankruptcy estate. Income goes in the first section, deductions and credits in the second, and the tax liability is calculated at the bottom.⁵ Schedule B calculates the income distribution deduction based on amounts paid or required to be paid to beneficiaries.

Issue a Schedule K-1 to Each Beneficiary

The fiduciary must prepare a separate Schedule K-1 (Form 1041) for every beneficiary who received, or was entitled to receive, a distribution. The K-1 shows each beneficiary’s share of the entity’s income, deductions, and credits, and it is what the beneficiary uses to complete their own return. The fiduciary must furnish each K-1 no later than the date Form 1041 is due — April 15 for calendar-year filers.³

Completed returns can be e-filed through the IRS system or mailed to one of two IRS processing centers, with the address depending on the filer’s state and whether a payment is enclosed.⁶

Deadlines and Extensions

Calendar-year estates and trusts file Form 1041 by April 15 of the following year.⁷ Fiscal-year filers file by the 15th day of the fourth month after the close of their tax year; a trust with a fiscal year ending June 30, for example, files by October 15.

Form 7004 grants an automatic five-and-a-half-month extension to file.² It buys time to submit the return, not to pay. Interest and the late-payment penalty run on any tax not paid by the original due date.

The Fiscal Year Option for Estates

Unlike trusts, which generally must use a calendar year, an estate can choose a fiscal year. That flexibility lets the executor defer income into a later period and potentially spread the tax burden across two of the beneficiaries’ tax years. A qualified revocable trust — one the decedent could have revoked during their lifetime — can elect under Section 645 of the Internal Revenue Code to be treated as part of the estate for income tax purposes, by filing Form 8855 with the estate’s first Form 1041. The election is irrevocable and brings access to the fiscal year, the $600 estate exemption, and a two-year exemption from estimated tax payments.⁸

Estimated Tax Payments

The fiduciary must make quarterly estimated tax payments if the entity expects to owe $1,000 or more for 2026 after subtracting withholding and credits.⁴ Payments are made using Form 1041-ES on quarterly deadlines that generally fall on April 15, June 15, September 15, and January 15.

Two exceptions. A decedent’s estate is exempt from estimated tax payments for any tax year ending within two years of the date of death. A trust that received the residue of the decedent’s estate and elected treatment under Section 645 is exempt during the same two-year window.⁴

Penalties and Interest

Missing the filing deadline triggers a penalty of 5% of the unpaid tax for each month or partial month the return is late, up to 25%.² If the return is more than 60 days late, the minimum penalty is $525 or the total tax owed, whichever is less.⁹ A fraudulent late return carries a steeper 15% per month penalty, up to 75%.

A separate penalty of 0.5% per month, up to 25%, applies to unpaid tax.² Interest also accrues on any unpaid balance, compounded daily. For the first quarter of 2026, the IRS interest rate for underpayments is 7%.¹⁰ An extension on Form 7004 avoids the late-filing penalty, but not interest or the late-payment penalty.

Keeping Records

Keep copies of the filed return and all supporting documents for at least three years from the filing date, or two years from the date the tax was paid, whichever is later.¹¹ Some situations call for longer retention:

Six years if the return omitted more than 25% of gross income
Seven years if a deduction was claimed for worthless securities or bad debts
Indefinitely if no return was filed or a fraudulent return was filed

Estate and trust administration often spans several years and involves layered asset transfers, so fiduciaries commonly hold records well past the minimum period.

1
Internal Revenue Service. About Form 1041, U.S. Income Tax Return for Estates and Trusts
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Internal Revenue Service. Instructions for Form 1041 and Schedules A, B, G, J, and K-1 (2025)
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Internal Revenue Service. Instructions for Form 1041 and Schedules A, B, G, J, and K-1 (2025)
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Internal Revenue Service. 2026 Form 1041-ES, Estimated Income Tax for Estates and Trusts
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Internal Revenue Service. Form 1041, U.S. Income Tax Return for Estates and Trusts
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Internal Revenue Service. Where to File Your Taxes for Form 1041
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Internal Revenue Service. Forms 1041 and 1041-A: When to File
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Office of the Law Revision Counsel. 26 U.S. Code 645 – Certain Revocable Trusts Treated as Part of Estate
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Internal Revenue Service. Topic No. 653, IRS Notices and Bills, Penalties and Interest Charges
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Internal Revenue Service. Quarterly Interest Rates
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Internal Revenue Service. How Long Should I Keep Records