File Estimated Taxes Form 1041-ES – Filing estimated taxes using Form 1041-ES is a critical requirement for many U.S. estates and trusts to avoid underpayment penalties. Whether you’re a fiduciary managing a decedent’s estate or a complex trust, understanding how to calculate, file, and pay estimated income taxes ensures compliance with IRS rules and smooth tax filing season.
This comprehensive guide, based on the latest IRS resources for tax year 2026, walks you through everything you need to know about Form 1041-ES—from who must file to step-by-step instructions and payment options.
What Is Form 1041-ES?
Form 1041-ES, Estimated Income Tax for Estates and Trusts, is the official IRS form used by fiduciaries (executors, administrators, or trustees) to figure and pay estimated federal income tax for an estate or trust.
Estimated tax is the amount the estate or trust expects to owe for the year after subtracting any tax withheld and eligible credits. The 2026 revision of Form 1041-ES (posted December 1, 2025) includes:
- An Estimated Tax Worksheet
- A Tax Computation Worksheet (for net capital gains or qualified dividends)
- The 2026 Tax Rate Schedule
- Four payment vouchers
Fiduciaries use this package primarily for first-time filers. After the first voucher is processed, the IRS typically sends preprinted vouchers for future years.
Who Must File Form 1041-ES?
A fiduciary must make estimated tax payments with Form 1041-ES if the estate or trust is expected to owe at least $1,000 in tax for 2026 after subtracting withholding and credits, and the withholding/credits are expected to be less than the smaller of:
- 90% of the tax shown on the 2026 Form 1041 (or 66⅔% for qualifying farmers/fishermen), or
- 100% of the tax shown on the 2025 Form 1041 (110% if adjusted gross income on the 2025 return exceeded $150,000 and less than ⅔ of gross income was from farming/fishing)
If no 2025 return was filed or it didn’t cover a full 12 months, only the 90% rule applies.
Exceptions (no estimated payments required):
- An estate or trust with no tax liability for its full 12-month 2025 tax year
- A decedent’s estate for any tax year ending before the date that is 2 years after the decedent’s death
- Certain trusts treated as owned by the decedent (receiving estate residue or primarily responsible for debts/taxes/expenses) within the same 2-year window
Household employment taxes are included in calculations only under specific conditions.
When Are Form 1041-ES Estimated Tax Payments Due?
For calendar-year estates and trusts (most common), payments are due in four installments:
| Installment | Due Date |
|---|---|
| 1st | April 15, 2026 |
| 2nd | June 15, 2026 |
| 3rd | September 15, 2026 |
| 4th | January 15, 2027 |
If the 15th falls on a weekend or legal holiday, the due date shifts to the next business day.
Fiscal-year filers: Payments are due on the 15th day of the 4th, 6th, and 9th months of the tax year, plus the 15th day of the 1st month following the end of the tax year.
You may pay the full amount with the first voucher or use the annualized income installment method (see IRS Publication 505) if income is uneven.
How to Calculate Estimated Taxes Using Form 1041-ES?
Follow these steps with the 2026 Estimated Tax Worksheet included in the form:
- Enter adjusted total income expected for 2026.
- Subtract expected income distribution deduction, estate tax deduction, and exemption.
- Calculate taxable income.
- Figure tax using the 2026 Tax Rate Schedule (or the special Tax Computation Worksheet Using Maximum Capital Gains Rates if net capital gains or qualified dividends are expected).
- Add alternative minimum tax and other taxes.
- Subtract credits.
- Determine the required annual payment (smaller of 90% of current-year tax or 100%/110% of prior-year tax).
- Subtract expected withholding and refundable credits.
- Divide the result by 4 for each quarterly installment (adjust for overpayments from 2025).
Keep the worksheet for your records. Use your 2025 Form 1041 and instructions as a guide.
Step-by-Step Guide to Filing Form 1041-ES
- Download the form — Get the latest 2026 Form 1041-ES package from IRS.gov.
- Complete the worksheet — Calculate the required payment.
- Fill out the payment voucher — Include the estate/trust name, EIN, tax period (2026), and payment amount.
- Make your payment (see options below).
- Keep records — Retain a copy of the voucher and proof of payment.
- Repeat quarterly — Or pay in full early to simplify.
After the first payment, preprinted vouchers arrive automatically.
Pro tip: Always use the estate or trust’s correct EIN (not the fiduciary’s SSN).
Payment Options for Form 1041-ES
Recommended: Electronic Federal Tax Payment System (EFTPS)
EFTPS is the IRS-preferred, free, secure way to pay. Enroll at EFTPS.gov (select “Business” even for estates/trusts). Schedule payments up to 365 days in advance. You’ll receive a PIN by mail (allow 5–7 business days).
Mail with voucher
- Attach a check or money order payable to “United States Treasury.”
- Write the EIN, “2026 Form 1041-ES,” and tax period on the check.
- Mail to the address listed in the Form 1041-ES instructions (varies by location).
Other notes:
- Trusts and estates generally cannot use IRS Direct Pay.
- Wiring funds directly from a financial institution is an alternative.
- Electronic payments are strongly encouraged and may soon be required in many cases.
Avoiding Underpayment Penalties with Form 1041-ES
The IRS charges a penalty for underpaying estimated taxes (calculated on Form 2210 and reported on Form 1041, line 27). To avoid it, pay at least the required annual payment using the safe-harbor rules above.
You can also use the annualized income installment method or request a waiver for reasonable cause.
Common Mistakes to Avoid
- Using the wrong EIN or tax year
- Forgetting to account for capital gains/qualified dividends properly
- Missing the January 15 final payment
- Not adjusting for uneven income
- Mailing vouchers without the payment stub or to the wrong address
- Failing to enroll in EFTPS when paper filing is no longer practical
Allocating Estimated Taxes to Beneficiaries (Form 1041-T)
Under IRC Section 643(g), a fiduciary may elect to treat part of the estimated tax payments as paid by beneficiaries. File Form 1041-T by the 65th day after the tax year ends (March 6, 2027, for calendar-year filers). Report the allocation on Schedule K-1 (box 13, code A).
Frequently Asked Questions About Form 1041-ES
Do simple trusts need to file Form 1041-ES?
Yes, if they meet the $1,000 threshold and other requirements.
Can I pay the entire year’s tax with the first voucher?
Yes—many fiduciaries do this for simplicity.
What if the estate is within 2 years of the decedent’s death?
Estimated payments are generally not required.
Where can I find the 2026 Tax Rate Schedule?
It’s printed in the Form 1041-ES package.
Conclusion: Stay Compliant and Avoid Penalties
Properly filing estimated taxes with Form 1041-ES protects your estate or trust from costly penalties and ensures smooth tax administration. Always consult the latest IRS instructions, Publication 505 (Tax Withholding and Estimated Tax), or a qualified tax professional for your specific situation.
Download the official 2026 Form 1041-ES and instructions directly from IRS.gov for the most accurate, up-to-date information.
Need help? Visit IRS.gov/Form1041ES or contact a fiduciary tax advisor today. Filing on time keeps your estate or trust in good standing with the IRS.