Updated October 18, 2026. Quick answer: If an estate’s or trust’s estimated tax changes during the year, the package says to refigure the total and the payment due for each remaining period. A penalty can apply when payments are short or late, even if the return shows an overpayment. The fiduciary can also elect to have part of the payments treated as the beneficiary’s by filing Form 1041-T.
Amending estimated tax payments
“To change or amend the estate’s or trust’s estimated tax payments, refigure the total estimated tax payments due (line 16 of the 2026 Estimated Tax Worksheet).” Then “use Worksheet 2-7, Annualized Estimated Tax Worksheet, in Pub. 505 to figure the payment due for each remaining period.” The caution that follows: “If an estimated tax payment for a previous period is less than” “of the amended estimated tax, the estate or trust may owe a penalty when its return is filed.”
When a penalty is applied
“In some cases, the estate or trust may owe a penalty when it files its return.” “The penalty is imposed on each underpayment for the number of days it remains unpaid.” The package lists the triggers: “A penalty may be applied if the estate or trust didn’t pay enough estimated tax or it didn’t make the payments on time or in the required amount.”
A return showing an overpayment does not end the question: “A penalty may apply even if the estate or trust has an overpayment on its tax return.” On relief, the package says only “The penalty may be waived under certain conditions.” and “See Pub. 505 for details.” For an individual’s version of the penalty, see the Form 1040 line 38 estimated tax penalty page.
The beneficiary election on Form 1041-T
“The fiduciary (or executor, for the final year of the estate) may elect to have any portion of its estimated tax payments treated as made by a beneficiary”, in the package’s words “(and not as payments made by the estate or trust).” The timing is fixed: “Such an amount is treated as a payment of the estimated tax made by the beneficiary on January 15 following the end of the tax year.”
“The fiduciary must make the election on the 2026 Form 1041-T, Allocation of Estimated Tax Payments to Beneficiaries.” “The election must be filed on or before the 65th day after the close of the estate’s or trust’s tax year.” “For details, see section 643(g).” The form is explained on the Form 1041-T page and its first lines on the Form 1041-T lines 1 to 4 page. Beneficiaries see their share on the Schedule K-1, covered on the Schedule K-1 box 13 page.
What to enter and where it comes from
The amended total comes from the fiduciary’s own worksheet and the payment records kept on the Record of Estimated Tax Payments described on the Form 1041-ES payment vouchers page. The package itself points to Publication 505 for the annualized worksheet and for waiver details.
Where it goes next
A penalty, if any, is figured when the return is filed; the return is explained on the Form 1041 for estates page. An election goes on Form 1041-T within the period quoted above. The hub for the whole package is Form 1041-ES. Publication 505 states the starting point: “Estates and trusts must also pay estimated tax.”
Edition and line numbers
This page reads the 2026 Form 1041-ES package, which the IRS titles “Estimated Income Tax for Estates and Trusts”. It is the current file irs.gov served on 2026-10-18, identical to the archived copy, and the package carries the footer “Created 11/20/2025”. Every date on this page is a date the 2026 package prints for 2026 payments, not a date for any other year. The package works from worksheet line numbers, so check the revision date printed on your own copy and use the line numbers on that revision.
Common mistakes
- Missing the election deadline. The package says “The election must be filed on or before the 65th day after the close of the estate’s or trust’s tax year.”
- Assuming an overpaid return avoids the penalty. The package says “A penalty may apply even if the estate or trust has an overpayment on its tax return.”
- Amending only the current payment. The package says to “figure the payment due for each remaining period.”
Related: Form 1041-ES, Form 1041-T, Form 1040 line 38 estimated tax penalty, and Schedule K-1 box 13.
Sources
- Form 1041-ES, Estimated Income Tax for Estates and Trusts (2026): https://www.irs.gov/pub/irs-pdf/f1041es.pdf
- Publication 505, Tax Withholding and Estimated Tax (2026): https://www.irs.gov/pub/irs-pdf/p505.pdf
Read from the IRS documents linked above on October 18, 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.