Capital gains tax for trusts and estates uses the same 0%, 15%, and 20% long-term rates that apply to individuals, but the brackets are severely compressed: in 2026, a fiduciary entity reaches the top 20% rate at just $16,250 of taxable income, and the 3.8% Net Investment Income Tax kicks in at roughly $16,000. A trust holding onto a modest long-term gain can face a combined federal rate of 23.8%, while the same gain distributed to a beneficiary in a lower bracket might be taxed at 15% or even 0%. The fiduciary’s central decision is who pays: the entity, a beneficiary, or the grantor.
2026 Rates for Trusts and Estates
Long-term capital gains inside a trust or estate are taxed at these thresholds for 2026:
- 0% on taxable income up to $3,300
- 15% from $3,301 to $16,250
- 20% above $16,250
A single filer doesn’t reach the 20% rate until taxable income tops roughly $518,900. The compression is deliberate; Congress designed it to discourage families from parking investment income inside trusts to sidestep higher individual rates.
Short-term gains and other ordinary income face a similarly steep schedule for 2026:1Internal Revenue Service. Revenue Procedure 2025-32
- 10% up to $3,300
- 24% from $3,301 to $11,700
- 35% from $11,701 to $16,000
- 37% over $16,000
The 3.8% Net Investment Income Tax applies to trusts and estates once adjusted gross income exceeds the dollar amount where the top ordinary bracket begins, which is $16,000 in 2026.2Internal Revenue Service. Questions and Answers on the Net Investment Income Tax For individuals, the same surtax doesn’t start until AGI passes $200,000 (single) or $250,000 (married filing jointly). That gap is what makes retaining gains inside a fiduciary entity so expensive.
How to Figure the Gain: Basis and Holding Period
Before any rate applies, the fiduciary needs the asset’s cost basis. The rules differ sharply between property that passed through an estate at death and property transferred to an irrevocable trust during life.
Stepped-Up Basis for Inherited Assets
Assets passing through an estate get a stepped-up basis under Section 1014: the basis resets to fair market value on the date of death, wiping out lifetime appreciation.3Office of the Law Revision Counsel. 26 USC 1014 – Basis of Property Acquired From a Decedent Stock the decedent bought for $10,000 that was worth $200,000 at death gives the estate a $200,000 basis. Only post-death appreciation is taxable when the estate sells.
The executor can instead elect an alternate valuation date six months after death, but only if the election reduces both total estate value and the estate tax owed, and the choice is irrevocable.4Office of the Law Revision Counsel. 26 USC 2032 – Alternate Valuation Assets sold or distributed within those six months are valued on the disposition date.
Carryover Basis for Irrevocable Trusts
Irrevocable trusts funded during the grantor’s lifetime get no step-up. The trust inherits the grantor’s original basis. Shares bought at $10 and transferred when worth $50 stay at $10 in the trust’s hands; all $40 of built-in gain is taxable when the trust sells. The IRS confirmed in Revenue Ruling 2023-2 that assets in irrevocable trusts not includable in the grantor’s estate do not qualify for a basis adjustment at the grantor’s death.
To calculate the taxable gain, subtract the adjusted basis and selling expenses (brokerage commissions, escrow fees, transfer taxes) from the gross sale price.
Holding Period
Assets held more than a year produce long-term gains at the preferential rates. Assets held a year or less produce short-term gains taxed at ordinary rates, which hit 37% at $16,000 of taxable income. Inherited assets are automatically treated as long-term regardless of how recently the decedent acquired them. For property transferred into an irrevocable trust, the grantor’s holding period carries over along with the basis.
Grantor Trusts: When the Trust Doesn’t Pay
Not every trust is a separate taxpayer. Under Sections 671 through 679, a trust is ignored for income tax purposes if the grantor retains certain powers over the assets.5Office of the Law Revision Counsel. 26 USC 671 – Trust Income, Deductions, and Credits Attributable to Grantors and Others as Substantial Owners All income, deductions, and capital gains land on the grantor’s personal return, and no Form 1041 tax is owed by the trust itself.
Powers that trigger grantor trust treatment include the power to revoke the trust, the power to substitute assets of equivalent value, the right to borrow from the trust without adequate security, and a retained reversionary interest. Revocable living trusts are always grantor trusts during the grantor’s lifetime. Many irrevocable trusts are intentionally drafted as grantor trusts because having the grantor pay the income tax is itself a tax-free gift to the beneficiaries.
Sales between a grantor and their grantor trust produce no taxable gain because the IRS treats them as the same taxpayer. At the grantor’s death, a revocable trust typically becomes irrevocable and starts filing its own return; an irrevocable grantor trust may lose grantor status depending on which power triggered it.
Pushing Gains Out to Beneficiaries
Given how quickly a trust or estate hits the top brackets, distributing income to beneficiaries in lower brackets is the biggest tax lever available. Capital gains, though, are much harder to distribute than ordinary income.
The DNI Ceiling and the Corpus Problem
A trust or estate can only deduct distributions up to its Distributable Net Income. DNI caps how much income can be shifted to beneficiaries. The problem: under Section 643(a)(3), capital gains allocated to corpus (principal) are generally excluded from DNI.6Office of the Law Revision Counsel. 26 USC 643 – Definitions Applicable to Subparts A, B, C, and D Even if the trustee writes a check to the beneficiary, the capital gain doesn’t automatically follow onto the beneficiary’s return.
Capital gains reach DNI, and can be shifted to beneficiaries, only in three situations:7eCFR. 26 CFR 1.643(a)-3 – Capital Gains and Losses
- The trust instrument or state law allocates gains to income (including unitrust conversions that treat a percentage of total return as income).
- The trustee consistently treats gains allocated to corpus as part of beneficiary distributions on the books, records, and tax returns.
- Gains allocated to corpus are actually paid out and used in calculating the distribution amount.
Otherwise, the gain stays at the trust level and is taxed at the compressed brackets. This is why trust document language matters so much: a well-drafted trust gives the trustee explicit authority to allocate gains to income or to distributions, while a poorly drafted one traps the gain.
Simple vs. Complex Trusts
Simple trusts must distribute all accounting income to beneficiaries each year and cannot accumulate income or make charitable gifts. Capital gains in a simple trust are typically allocated to principal, so they often stay stuck at the entity level despite the mandatory income distribution rule.
Complex trusts can accumulate income, make charitable contributions, and distribute principal. That flexibility, combined with the right trust language, lets the trustee weigh entity-level tax against each beneficiary’s marginal rate before deciding whether to retain or distribute a gain.
The 65-Day Rule
A trustee who misses the December 31 window has a second chance. Under Section 663(b), a complex trust can elect to treat distributions made in the first 65 days of the new year as if made on the last day of the prior year.8eCFR. 26 CFR 1.663(b)-1 – Distributions in First 65 Days of Taxable Year The election is made on the prior-year Form 1041 and applies only to the amounts the trustee designates. The amount that qualifies is capped at the greater of the trust’s accounting income or DNI for that year, reduced by amounts already distributed. The election is available to trusts but not to estates.
Deductible Expenses That Shrink the Gain
Trusts and estates can reduce taxable income, including taxable capital gains, by deducting administrative costs that exist only because property is held in a fiduciary entity. Under Section 67(e), the test is whether the expense would have been incurred if the property were held outside a trust or estate. Deductible costs include trustee fees, executor commissions, legal fees for administration, and preparation costs for Form 1041.
Investment management and custodial fees are generally not deductible because an individual investor would incur them too. Property insurance, HOA dues, and routine maintenance on trust-owned real estate are not deductible unless the property produces rental income or is used in a business. This holds even if the trust instrument tells the trustee to pay them.
Filing, Payments, and Deadlines
Every trust or estate with $600 or more in gross income (or any taxable income if a beneficiary is a nonresident alien) must file Form 1041.9Internal Revenue Service. About Form 1041, U.S. Income Tax Return for Estates and Trusts Capital gains and losses go on Schedule D, which requires acquisition date, sale date, sale price, and basis for each transaction. Basis errors, particularly on stepped-up assets where the executor’s valuation may not match brokerage records, are the most common audit trigger on fiduciary returns.
When gains or income are distributed, the fiduciary issues a Schedule K-1 to each beneficiary showing their share by category, and files copies with the IRS.10Internal Revenue Service. Schedule K-1 (Form 1041) – Beneficiary’s Share of Income, Deductions, Credits, and Other Items Every trust and estate needs its own Employer Identification Number, obtained on Form SS-4. Trusts must use a calendar year. Estates can elect a fiscal year ending in any month, which the executor picks on the first return; once chosen, it generally cannot be changed.
Estimated Payments
A trust or estate expecting to owe $1,000 or more after withholding and credits must pay quarterly estimates on Form 1041-ES.11Internal Revenue Service. 2026 Form 1041-ES, Estimated Income Tax for Estates and Trusts For calendar-year entities, the 2026 due dates are April 15, June 15, and September 15, 2026, plus January 15, 2027. The safe harbor is the lesser of 90% of current-year tax or 100% of prior-year tax, rising to 110% if prior-year AGI exceeded $150,000.
New estates get a break: estimated payments are not required for any tax year ending within two years of the decedent’s death.12Internal Revenue Service. 2025 Instructions for Form 1041 A trust that received the residue of the decedent’s estate under the will qualifies for the same two-year exception.
Deadlines and Penalties
Form 1041 is due the 15th day of the fourth month after the tax year closes. For calendar-year filers, that’s April 15.13Internal Revenue Service. Forms 1041 and 1041-A – When to File Form 7004 provides an automatic five-and-a-half-month extension to file, but any tax owed is still due on the original date.14Internal Revenue Service. Instructions for Form 7004
Late filing costs 5% of unpaid tax per month, capped at 25%, with a minimum of $525 (or the total tax due, if less) once the return is more than 60 days late. Late payment adds 0.5% per month, also capped at 25%, and interest runs from the original due date.12Internal Revenue Service. 2025 Instructions for Form 1041 Filing on time even when the entity can’t pay eliminates the more expensive late-filing penalty and drops the monthly cost from 5.5% to 0.5%. Penalties are assessed against trust or estate assets, but a trustee who repeatedly fails to file can face personal liability under state fiduciary duty law.