Updated October 16, 2026. Quick answer: Form 1041 is the income tax return for a domestic estate or trust. The instructions put the due date for a calendar-year estate or trust at April 15 after the year ends, which for a calendar year 2026 return is April 15, 2027 by the same rule. Form 7004 gives an automatic extension of time to file, but it does not extend the time to pay.
More IRS forms and schedules, read line by line: Form 5227 instructions.
IRS trust and estate tax forms, read line by line: Form 1041-ES, Form 1041-ES due dates and Form 4810 filing.
Form 1041 (estate and trust income tax return), read line by line: Form 1041 lines 1 to 3, Form 1041 lines 4 to 9, Form 1041 lines 18 to 22 and Form 1041 lines 23 to 30.
More IRS forms and schedules, read line by line: Form 7004 instructions.
Related reading on this site: Form 1040 due date 2027 and Form 1065 and 1120-S due date 2027.
Quick reference
| Item | Figure printed in the 2025 instructions |
|---|---|
| Late filing, per month | 5% of the tax due, up to 25% |
| Late filing, return more than 60 days late | the smaller of $525 or the tax due |
| Late payment, per month | 1/2 of 1% of the unpaid amount, up to 25% |
| Gross income that triggers a filing, estate or trust | $600 or more |
When Form 1041 is due
The instructions’ When To File section states the calendar-year rule: “For calendar year estates and trusts, file Form 1041 and Schedule(s) K-1 by April 15, 2026.” That sentence is written for the 2025 return, the year the 2025 instructions cover. The IRS also prints it in the reminders: “Calendar-year estates and trusts must file Form 1041 by April 15, 2026.”
Applying the same April 15 rule one year later, a calendar year 2026 return is due April 15, 2027. April 15, 2027 falls on a Thursday, so the weekend rule below does not move it. This date is computed here, not published by the IRS.
An estate or trust with a fiscal year is dealt with in a separate sentence, and the instructions give their own example: “For example, an estate that has a tax year that ends on June 30, 2026, must file Form 1041 by October 15, 2026.”
| Case | As printed in the 2025 instructions |
|---|---|
| Calendar-year estate or trust | “For calendar year estates and trusts, file Form 1041 and Schedule(s) K-1 by April 15, 2026.” That sentence covers the 2025 return. |
| Fiscal-year estate or trust | “For fiscal-year estates and trusts, file Form 1041 by the 15th day of the 4th month following the close of the tax year.” |
| Weekend or holiday | “If the due date falls on a Saturday, Sunday, or legal holiday, file on the next business day.” |
| Bankruptcy estate | “File Form 1041 on or before the 15th day of the 4th month following the close of the tax year.” |
An estate or trust that pays out income should also read the 65 day rule page.
The automatic extension on Form 7004
The extension is requested on a different form. The Form 1041 instructions say: “If more time is needed to file the estate or trust return, use Form 7004, Application for Automatic Extension of Time To File Certain Business Income Tax, Information, and Other Returns, to apply for an automatic” extension of time to file, and the extension is 5½ months.
The Form 7004 instructions repeat the length. Under Maximum extension period they say “The automatic extension period for time to file is generally 6 months.” “Exceptions apply for certain filers of Form 1041”, which is why an estate or trust gets 5 and a half months rather than 6. The Form 1041 line instruction says the same thing: “The extension of time to file an estate (other than a bankruptcy estate) or trust return is” 5½ months.
| Item | As printed |
|---|---|
| Estate (other than a bankruptcy estate) or trust | “An estate (other than a bankruptcy estate) and a trust filing Form 1041 are eligible for an automatic” extension of time to file of 5½ months. |
| Bankruptcy estate | “Use Form 7004 to apply for an automatic 6-month extension of time to file.” |
| When to file Form 7004 | “Generally, Form 7004 must be filed on or before the due date of the applicable tax return.” |
| Signature | “No signature is required on this form.” |
Form 7004 has to be on time itself. The purpose paragraph says the extension “will be granted if you complete Form 7004 properly, make a proper estimate of the tax (if applicable), file Form 7004 by the due date of the return for which the extension is requested, and pay any tax that is due.”
For a calendar year 2026 return, counting 5 months from April 15, 2027 reaches September 15, 2027, and adding the half month, 15 days, reaches September 30, 2027, a Thursday. That extended date is computed here, not published by the IRS. Confirm the extended due date against the IRS instructions for the year being filed before relying on it.
An extension is not more time to pay
Filing Form 7004 moves the filing deadline only. The caution in the Form 7004 instructions reads “Form 7004 does not extend the time to pay any tax due.” “Generally, payment of any balance due on Part II, line 8, is required by the due date of the return for which this extension is filed.”
Interest runs from the regular due date. The Form 1041 instructions say “Interest is charged on taxes not paid by the due date, even if an extension of time to file is granted.” The Form 7004 instructions agree: “It will be charged even if you have been granted an extension or have shown reasonable cause for not paying on time.”
Late filing and late payment penalties
The late filing rule is stated in the Interest and Penalties section: “The law provides a penalty of 5% of the tax due for each month, or part of a month, for which a return isn’t filed up to a maximum of 25% of the tax due” “If the return is more than 60 days late, the minimum penalty is the smaller of $525 or the tax due.”
A reasonable cause defense is available: “The penalty won’t be imposed if you can show that the failure to file on time was due to reasonable cause.”
The late payment penalty is separate: “Generally, the penalty for not paying tax when due is 1/2 of 1% of the unpaid amount for each month or part of a month it remains unpaid.” “The maximum penalty is 25% of the unpaid amount.” “Any penalty is in addition to interest charges on late payments.”
Who must file Form 1041
The instructions give separate tests for an estate and a trust. The fiduciary files “for a domestic estate that has:” and for “a domestic trust taxable under section 641 that has:”
| Filer | Gross income test, as printed |
|---|---|
| Decedent’s estate | “Gross income for the tax year of $600 or more;” Or a nonresident alien beneficiary. |
| Trust | “Gross income of $600 or more (regardless of taxable income);” Or “Any taxable income for the tax year;” |
A third trigger applies to either: “A beneficiary who is a nonresident alien;”. If the estate is a foreign estate, the instructions say to file a different return: “file Form 1040-NR, U.S. Nonresident Alien Income Tax Return, instead of Form 1041.”
Schedule K-1 to beneficiaries and the 65 day election
Beneficiaries get their Schedule K-1 on the same clock as the return. The instructions say “You must provide Schedule K-1 (Form 1041), on or before the day you are required to file Form 1041, to each beneficiary who receives a distribution of property or an allocation of an item of the estate.”
The instructions price a late or wrong K-1 as well: “a $340 penalty may be imposed with regard to each Schedule K-1 for which a failure occurs.” “The penalty won’t be imposed if the fiduciary can show that not providing information timely and correctly was due to reasonable cause and not due to willful neglect.”
The 65 day election ties to the return’s due date. Question 6 on the form says “To make the section 663(b) election to treat any amount paid or credited to a beneficiary within 65 days following the close of the tax year as being paid or credited on the last day of that tax year, check the box.” “For the election to be valid, you must file Form 1041 by the due date (including extensions).” A late return therefore puts the election at risk, which the 65 day rule page walks through.
The edition read for this page is the Instructions for Form 1041 (2025), which are the 2025 instructions and the revision irs.gov served when they were read on 2026-10-16, together with the Instructions for Form 7004 (Rev. December 2025). Dates for a calendar year 2026 return are computed here by applying the printed rules and are not published by the IRS. Check the revision printed on the form you are filing, because a later revision can change the dates, the penalty amounts and the filing thresholds.
Common mistakes
- Treating the Form 7004 extension as more time to pay. The Form 7004 instructions say it does not extend the time to pay any tax due, and the Form 1041 instructions say interest is charged on taxes not paid by the due date even if an extension of time to file is granted.
- Using the individual extension length. The Form 7004 instructions list the Form 1041 estate or trust extension as an exception, 5 and a half months rather than the general 6 months, and the Form 1041 instructions say a bankruptcy estate uses a 6-month extension.
- Filing the return late and losing the 65 day election. The Question 6 instructions say the election is valid only if Form 1041 is filed by the due date including extensions, and the fiduciary should send Schedule K-1 to each beneficiary on or before the day the return is required to be filed.
Related: Form 1041 for estates, the 65 day rule, deadlines after a death calculator, Form 706 due date and extension, and capital gains that stay in the trust.
Sources
- 2025 Instructions for Form 1041 and Schedules A, B, G, J, and K-1: https://www.irs.gov/pub/irs-pdf/i1041.pdf
- Instructions for Form 7004 (Rev. December 2025): https://www.irs.gov/pub/irs-pdf/i7004.pdf
Read from the IRS documents linked above on October 16, 2026. General information, not tax advice. Your own facts decide the outcome, and a preparer, the account provider or the IRS is the right place to confirm anything consequential.