The 65-day rule for trusts, set out in Section 663(b) of the Internal Revenue Code, lets a trustee or estate executor treat distributions made in the first 65 days of a new tax year as if they were paid on the last day of the prior year. For a calendar-year trust, that pushes the deadline to March 6 in most years, or March 5 in a leap year. Make the distribution by that date and check one box on the return, and the income moves off the trust’s tax return and onto the beneficiary’s.1Office of the Law Revision Counsel. 26 U.S. Code 663 – Special Rules Applicable to Sections 661 and 662
Why the Timing Shift Matters
Trusts and estates run on a badly compressed rate schedule. For 2026, a trust hits the top 37% federal bracket at just $16,000 of taxable income.2Internal Revenue Service. 2026 Form 1041-ES Estimated Income Tax for Estates and Trusts A single individual doesn’t reach that same 37% rate until taxable income exceeds $640,600.3Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 The same dollar of income taxed inside the trust versus in most beneficiaries’ hands produces very different bills.
The rule exists because fiduciaries usually can’t know the trust’s actual income until well into the new year. Final dividend statements, partnership K-1s, and corrected 1099s arrive over weeks. Section 663(b) gives the fiduciary time to see the year’s real numbers and then move income out before the trust’s return is filed.4eCFR. 26 CFR 1.663(b)-1 – Distributions in First 65 Days of Taxable Year
The math is roughly the spread between the trust’s marginal rate and the beneficiary’s, multiplied by the amount distributed. On $50,000 shifted from a trust in the 37% bracket to a beneficiary in the 24% bracket, that’s several thousand dollars a year in federal tax.
Who Can Use It
Two entities qualify: estates and complex trusts.1Office of the Law Revision Counsel. 26 U.S. Code 663 – Special Rules Applicable to Sections 661 and 662 A complex trust is one whose terms allow it to accumulate income or distribute principal rather than paying out all current income each year. An estate is the entity holding a deceased person’s assets during administration.
Simple trusts can’t use the election because they don’t need it. Their governing documents already require all current income to be distributed annually, and that income is taxed to the beneficiaries regardless of when the check clears.
Revocable living trusts sit outside the rule during the grantor’s lifetime because they don’t file their own return. After the grantor’s death, the trustee and executor can file Form 8855 to make a Section 645 election, which treats the qualified revocable trust as part of the decedent’s estate for income tax purposes.5Internal Revenue Service. About Form 8855, Election to Treat a Qualified Revocable Trust as Part of an Estate Once that election is in place, the combined entity uses the 65-day rule the same way any estate does.
How Much You Can Elect
The election isn’t a blank check. The amount treated as a prior-year distribution is capped at the greater of the trust’s accounting income or its distributable net income (DNI) for that prior year, reduced by anything already distributed or required to be distributed during that year.4eCFR. 26 CFR 1.663(b)-1 – Distributions in First 65 Days of Taxable Year
Section 661 sits behind that cap, limiting the trust’s distribution deduction to its DNI.6Office of the Law Revision Counsel. 26 U.S. Code 661 – Deduction for Estates and Trusts Accumulating Income or Distributing Corpus You cannot distribute principal in February and use it to erase the prior year’s taxable income. The deduction is tied to actual income the trust earned.
The fiduciary can also designate only a portion of a distribution for prior-year treatment. If $50,000 goes out in February and the fiduciary wants only $30,000 pulled back to the prior year, the election allows that partial allocation.4eCFR. 26 CFR 1.663(b)-1 – Distributions in First 65 Days of Taxable Year
Making the Election on Form 1041
Mechanically, the election is one checkbox. The fiduciary checks the box on line 6 of Schedule G on Form 1041.7Internal Revenue Service. Form 1041 U.S. Income Tax Return for Estates and Trusts Once the return is filed with that box checked, the election is locked for that tax year. It cannot be revoked.
The election must appear on a timely filed return, including extensions. For a calendar-year trust, that means April 15 of the following year, or the extended deadline if the fiduciary files for one.8Internal Revenue Service. Instructions for Form 1041 and Schedules A, B, G, J, and K-19Internal Revenue Service. Private Letter Ruling 202303001
Two deadlines, not one. The extension gives you more time to file the return that carries the election. It does not extend the 65-day window for the distribution itself. The money must actually reach the beneficiary, or be credited to the beneficiary’s account, by March 6 (or March 5 in a leap year), no matter when the return is eventually filed. Fiduciaries who confuse those two deadlines find out too late.
Aligning the Estimated Tax Payments
A common trap: the trust pays quarterly estimated tax during the year, then distributes the income to beneficiaries under the 65-day rule. The income moves to the beneficiary’s return, but the estimated payments stay stuck on the trust’s return, producing an overpayment on one side and an underpayment on the other.
Section 643(g) fixes this. The trustee can elect to treat all or part of the trust’s estimated tax payments as having been made by the beneficiaries.10Office of the Law Revision Counsel. 26 U.S. Code 643 – Definitions Applicable to Subparts A, B, C, and D The election is made on Form 1041-T, which must be filed on or before the 65th day after the close of the tax year, the same March deadline as the distribution itself.11Internal Revenue Service. About Form 1041-T, Allocation of Estimated Tax Payments to Beneficiaries Allocated amounts are treated as estimated tax the beneficiary paid on January 15 following the tax year.
If You Miss the Deadline
A missed election isn’t always fatal. Under the IRS’s Section 9100 relief procedures, a fiduciary who failed to check the box on time can request an extension by showing they acted reasonably and in good faith and that granting relief won’t prejudice the government’s interests.9Internal Revenue Service. Private Letter Ruling 202303001 The request requires affidavits and supporting documentation submitted under penalty of perjury.
Relief is discretionary, not automatic. A private letter ruling takes time and carries a user fee, and approval only extends the deadline to make the election, not the underlying eligibility. Marking the box on the original or extended return is the clean path.
State Rules May Not Follow
Federal treatment doesn’t automatically carry over. Some states that tax trust income don’t recognize the Section 663(b) election, so a distribution shifted to the prior year federally may still be taxed to the trust at the state level. Confirm state conformity before assuming the federal savings hold, particularly for trusts sitting in high-tax states.
Documentation and Penalty Exposure
The IRS expects fiduciaries to document the amount, date, and income character of every distribution claimed under the rule. That means bank statements or wire confirmations showing the transfer date, the DNI calculation with supporting schedules, and a copy of the governing trust document or will confirming the distribution was authorized.
Weak records carry real cost. Accuracy-related penalties under Section 6662 equal 20% of the underpayment if the IRS finds the deduction was overstated or the income character misreported.12Office of the Law Revision Counsel. 26 U.S. Code 6662 – Imposition of Accuracy-Related Penalty on Underpayments Interest accrues daily from the original due date on any unpaid balance. A $40,000 deduction that can’t be supported can produce an $8,000 penalty before interest.