How irrevocable trusts are taxed depends on one threshold question: is the trust a grantor trust or a non-grantor trust? A grantor trust is disregarded for income tax, so its income flows to the grantor’s Form 1040. A non-grantor trust is a separate taxpayer that files Form 1041, pays tax at steeply compressed brackets, and passes income out to beneficiaries through Schedule K-1.
An irrevocable non-grantor trust files Form 1041 and reaches the top 37% federal income tax bracket at just $16,000 of retained taxable income for 2026, versus $640,600 for a single individual (Source: Rev. Proc. 2025-32). Retained investment income can also face the 3.8% net investment income tax, for a combined 40.8%. Income distributed to beneficiaries is taxed to them instead, usually at lower personal rates.
How are irrevocable trusts taxed: the two paths
An irrevocable trust is taxed on one of two paths set by IRC sections 671 through 679. A grantor trust is disregarded for income tax, so its income is reported on the grantor’s Form 1040. A non-grantor trust is a separate taxpayer that files Form 1041, uses compressed brackets on retained income, and passes distributed income to beneficiaries on Schedule K-1 (Source: 2025 Instructions for Form 1041).
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Every irrevocable trust is taxed as either a grantor trust or a non-grantor trust, and that classification decides who reports the income. The grantor-trust rules in Internal Revenue Code sections 671 through 679 determine which path applies (Source: 2025 Instructions for Form 1041). This one distinction drives filing obligations, applicable rates, and planning options.
A grantor trust is treated as wholly owned by the grantor for income tax purposes. Under IRC sections 671-679, the trust is a disregarded entity, so its income, deductions, and credits are reported directly on the grantor’s individual Form 1040 (Source: 2025 Instructions for Form 1041). The trust itself generally pays no separate income tax while grantor-trust status applies.
A non-grantor trust is a separate taxpaying entity. It files its own Form 1041 (U.S. Income Tax Return for Estates and Trusts), calculates its own tax, and issues a Schedule K-1 (Form 1041) to each beneficiary who received a taxable distribution (Source: 2025 Instructions for Form 1041). The remainder of this guide focuses on the non-grantor path, because that is where the compressed brackets and the planning levers live.
One trigger for grantor-trust status is a reversionary interest. Generally, for transfers made in trust after March 1, 1986, the grantor is treated as the owner of any portion of a trust in which the grantor holds a reversionary interest in the income or corpus, if the value of that interest exceeds 5% at the inception of that portion (Source: IRC section 673; 2025 Instructions for Form 1041). Many other powers, such as the power to substitute assets of equivalent value, can also produce grantor status depending on the trust’s terms.
Who actually pays: a three-way decision flow
Three parties can bear the income tax on an irrevocable trust, and only one bears it in any given case. If the trust is a grantor trust, the grantor pays on Form 1040. If it is a non-grantor trust and keeps the income, the trust pays on Form 1041 at compressed rates. If the non-grantor trust distributes the income, the beneficiary pays through Schedule K-1 (Source: 2025 Instructions for Form 1041).
The rules resolve into a short sequence:
- Is the trust a grantor trust under IRC 671-679? If yes, the grantor reports all trust income on the grantor’s Form 1040, and the analysis ends there (Source: 2025 Instructions for Form 1041).
- If it is a non-grantor trust, was the income distributed? A trust or estate is allowed an income distribution deduction for amounts distributed to beneficiaries, and the beneficiary, not the trust, pays income tax on the distributive share (Source: 2025 Instructions for Form 1041).
- Whatever the non-grantor trust retains, the trust pays at the compressed Form 1041 brackets, plus the 3.8% net investment income tax on retained net investment income above the threshold (Source: IRS Topic No. 559; 26 U.S.C. 1411).
A worked example makes the compression concrete. Suppose a non-grantor trust earns $50,000 of ordinary taxable income in 2026. If the trust retains all $50,000, roughly $34,000 of it sits in the 37% bracket that begins at $16,000, so a large slice is taxed at the top rate (Source: Rev. Proc. 2025-32). If instead the trustee distributes that income to a beneficiary whose personal top rate is 22%, the same dollars are generally taxed to the beneficiary at that beneficiary’s rate through the Schedule K-1. This difference between the trust’s compressed brackets and a beneficiary’s brackets is a reason distribution decisions are analyzed each year.
Form 1041 and the $600 filing threshold
A non-grantor trust generally must file Form 1041 if it has any taxable income for the year, gross income of $600 or more regardless of taxable income, or a beneficiary who is a nonresident alien (Source: IRS Instructions for Form 1041). Form 1041 is the U.S. Income Tax Return for Estates and Trusts, and it is where the trust computes tax, the distribution deduction, and the amounts reported to beneficiaries.
Form 1041 pulls in several schedules. Schedule B computes the income distribution deduction and distributable net income; Schedule D reports capital gains and losses; Schedule K-1 reports each beneficiary’s share; and Schedule J handles accumulation distributions (Source: 2025 Instructions for Form 1041). A trust that expects to owe tax generally uses Form 1041-ES to make estimated payments.
Non-grantor trusts also claim a personal exemption on Form 1041. Under IRC section 642(b), the exemption is $300 for a simple trust required to distribute all its income currently and $100 for a complex trust; an estate’s exemption is $600, and a qualified disability trust exemption for 2025 is $5,100 (Source: 2025 Instructions for Form 1041; IRC section 642(b)). These amounts are small, which is part of why retained income is taxed so heavily.
The compressed trust tax brackets (2026)
Estates and non-grantor trusts use only four federal ordinary-income rates, 10%, 24%, 35%, and 37%, and they skip the 12%, 22%, and 32% brackets that individuals use. For 2026 the 37% rate starts at $16,000 of taxable income, up from $15,650 in 2025 (Source: Rev. Proc. 2025-32). A single individual does not reach 37% until $640,600 (Source: Rev. Proc. 2025-32).
The One Big Beautiful Bill Act (OBBBA) made the four rates permanent. Rev. Proc. 2025-32 states that the existing four tax rates of 10%, 24%, 35%, and 37% remain in effect for estates and trusts (Source: Rev. Proc. 2025-32). The table below shows the 2026 ordinary-income schedule for estates and trusts alongside the prior year.
| 2026 taxable income (estates & trusts) | Tax |
|---|---|
| Not over $3,300 | 10% of taxable income |
| Over $3,300 to $11,700 | $330 + 24% of excess over $3,300 |
| Over $11,700 to $16,000 | $2,346 + 35% of excess over $11,700 |
| Over $16,000 | $3,851 + 37% of excess over $16,000 |
The comparison with individual brackets shows the compression. A trust hits 37% at $16,000; a single filer does not reach that rate until $640,600 of taxable income for 2026 (Source: Rev. Proc. 2025-32). This is why several planning strategies aim to move taxable income out of the trust and onto a lower-bracket individual return.
Distributable net income and the distribution deduction
Distributable net income (DNI) is the ceiling on how much taxable income a non-grantor trust can shift to beneficiaries. The income distribution deduction for amounts paid, credited, or required to be distributed to beneficiaries is limited to DNI and is figured on Schedule B, line 7 of Form 1041 (Source: 2025 Instructions for Form 1041; IRC section 643). DNI also fixes the character of the income the beneficiary reports.
The mechanism is a matching one. When a non-grantor trust distributes income within the DNI limit, the trust deducts that amount and the beneficiary picks it up as taxable income on the Schedule K-1 (Source: 2025 Instructions for Form 1041). Dollars taxed to the beneficiary are not taxed again at the trust level, so distribution is one mechanism that determines whether income falls under the compressed trust brackets or a beneficiary’s brackets.
Character carries through. If the trust’s DNI includes qualified dividends or long-term capital gains that are distributed, those items generally keep their favorable character in the beneficiary’s hands rather than converting to ordinary income. The Schedule K-1 breaks the distribution into its component types so the beneficiary reports each correctly.
Income versus principal distributions
Distributions of trust income carried out through distributable net income are generally taxable to the beneficiary, while distributions of principal (corpus) are generally not taxable because principal typically represents amounts already taxed or contributed after tax. The trust document and state principal-and-income rules determine how a given distribution is classified (Source: 2025 Instructions for Form 1041).
The classification matters because it drives who, if anyone, is taxed. Income carried out to a beneficiary through DNI is picked up on that beneficiary’s return, while a return of corpus is generally a nontaxable transfer of amounts already accounted for. State principal-and-income statutes and the trust instrument together decide whether a payment counts as income or principal, and a single distribution can include both components reported separately on the Schedule K-1 (Source: 2025 Instructions for Form 1041; IRC section 643).
Simple trusts versus complex trusts
A simple trust is required to distribute all of its income currently, makes no principal distributions, and makes no charitable gifts in the year; its exemption is $300. A complex trust is any non-grantor trust that is not simple, so it may accumulate income, distribute principal, or give to charity; its exemption is $100 (Source: 2025 Instructions for Form 1041; IRC section 642(b)).
The distinction matters for who is taxed. Because a simple trust must distribute all income, that income is generally carried out to beneficiaries and taxed on their returns each year. A complex trust that accumulates income keeps it inside the compressed brackets rather than carrying it out to beneficiaries.
Capital gains inside an irrevocable trust
Capital gains of a non-grantor trust are generally allocated to principal and taxed at the trust level, not passed through to beneficiaries, unless the trust instrument or the trustee’s discretion (consistently exercised) directs otherwise (Source: 2025 Instructions for Form 1041). For 2026 the 20% long-term capital gains rate for estates and trusts applies to amounts above $16,250 (Source: Rev. Proc. 2025-32).
The long-term capital gains and qualified dividend breakpoints for estates and trusts are also compressed. The table shows the 2026 figures against 2025.
| Long-term capital gains rate (estates & trusts) | 2025 breakpoint | 2026 breakpoint |
|---|---|---|
| 0% rate applies up to | $3,250 | $3,300 |
| 15% rate applies up to | $15,900 | $16,250 |
| 20% rate applies above | $15,900 | $16,250 |
Because gains usually stay in the trust, they are exposed to the same rate compression as ordinary income. Some trust instruments permit the trustee to include capital gains in DNI, which can carry gains out to a beneficiary; whether that helps depends on the beneficiary’s own capital gains bracket and the trust’s terms.
The 3.8% net investment income tax on retained income
A 3.8% net investment income tax (NIIT) applies to estates and trusts with net investment income above a threshold equal to where the top income-tax bracket begins, $15,650 for 2025 (Source: IRS Topic No. 559). By statute the threshold tracks the top bracket, which is $16,000 for 2026 (Source: 26 U.S.C. 1411; Rev. Proc. 2025-32). Combined with the 37% rate, retained investment income can face 40.8%.
The NIIT reaches undistributed net investment income. Under 26 U.S.C. 1411(a)(2), the tax is 3.8% of the lesser of the trust’s undistributed net investment income or the excess of its adjusted gross income over the dollar amount at which the top bracket begins (Source: 26 U.S.C. 1411; IRS Topic No. 559). Investment income distributed to beneficiaries is generally tested against the beneficiary’s higher NIIT thresholds instead, which is another factor weighed when distribution decisions are analyzed. Q3 Advisors maintains a separate research page on the net investment income tax for 2026 for readers who want the individual-level detail.
The stacking effect is what makes trust compression severe. At only $16,000 of retained taxable income in 2026, a trust can be exposed to a 37% ordinary rate plus 3.8% NIIT on investment income, a combined marginal 40.8% (Source: IRS Topic No. 559; Rev. Proc. 2025-32). An individual would need income of several hundred thousand dollars to face the same combined rate.
Step-up in basis at death for irrevocable-trust assets
Whether irrevocable-trust assets receive a step-up in cost basis at death turns on estate inclusion. In Revenue Ruling 2023-2, the IRS concluded that assets held in an irrevocable grantor trust and excluded from the grantor’s gross estate do not receive a section 1014 basis step-up at the grantor’s death (Source: Rev. Rul. 2023-2). Assets that are included in the taxable estate generally do step up.
The trade-off is direct: keeping assets outside the taxable estate can reduce or eliminate estate tax, but under Rev. Rul. 2023-2 those same assets generally forgo the income tax basis step-up, so heirs may inherit the grantor’s original basis and a larger built-in capital gain (Source: Rev. Rul. 2023-2). Assets that remain inside the estate can incur estate tax but generally receive a basis equal to date-of-death fair market value under IRC section 1014.
The estate-tax side of that trade-off is now more generous. Under OBBBA, the basic exclusion amount for estate and gift tax is $15,000,000 for 2026, up from $13,990,000 for 2025, and the generation-skipping transfer (GST) exemption is also $15,000,000 for 2026, indexed after 2026 (Source: Rev. Proc. 2025-32). A larger exclusion means fewer estates owe federal estate tax, which can change how families weigh estate-tax savings against a lost step-up. This income-tax guide does not cover estate-planning vehicle selection; Q3 Advisors addresses exemption mechanics on its 2026 estate tax exemption page.
Planning levers tied to the taxation rules
Because the compressed brackets punish retained income, several rules let a trustee move income to lower-bracket beneficiaries or manage basis. The most commonly cited levers are the income distribution deduction, the 65-day rule, and, in some cases, modifying a trust to change estate inclusion. Each has strict mechanics and is neutral to describe, not a recommendation for any situation.
The available approaches, described neutrally, include:
- Distribute income to escape compression. Distributing DNI shifts taxable income from the trust’s 37%/40.8% environment to a beneficiary who may be in a lower bracket, using the income distribution deduction (Source: 2025 Instructions for Form 1041).
- Use the 65-day rule. Under IRC section 663(b), a fiduciary of a complex trust or estate may elect to treat amounts paid to a beneficiary within 65 days after year-end as paid on the last day of the prior tax year. The election is made on the return and is irrevocable after the due date (Source: 2025 Instructions for Form 1041; 26 U.S.C. 663(b); 26 CFR 1.663(b)-2). This can let a trustee finalize distribution decisions after seeing the year’s actual income.
- Consider basis and estate inclusion together. Where a trust instrument or state law permits modification or decanting, one approach families discuss with counsel is whether causing estate inclusion could restore a step-up under IRC section 1014, weighed against exposing assets to estate tax (Source: Rev. Rul. 2023-2). Whether this is appropriate depends entirely on the facts and the size of the estate.
- Coordinate with the beneficiary’s other income. A distribution that helps at the trust level can push a beneficiary into higher personal brackets or affect items like the Medicare IRMAA surcharges, so the two returns are often modeled together.
For retirement assets held in trust, additional rules apply. A trust named as an IRA beneficiary can qualify as a see-through (look-through) trust if it is valid under state law, is irrevocable or becomes irrevocable at the owner’s death, has identifiable beneficiaries, and the required documentation reaches the custodian (Source: IRS Publication 590-B). Under the SECURE Act 10-year rule, designated beneficiaries who are not eligible designated beneficiaries generally must withdraw the entire IRA balance by December 31 of the year containing the tenth anniversary of the owner’s death (Source: IRS Publication 590-B). Those distributions can land in the compressed trust brackets, which is why coordination with required minimum distribution planning and, for some households, a Roth conversion strategy is frequently modeled in advance.
State income taxation of trusts
Beyond federal tax, many states tax trust income, and the rules vary widely. States generally base trust taxation on connecting factors such as the domicile of the grantor, the residence of the trustee, the location of administration, or the residence of beneficiaries. California, for example, taxes trust income under Revenue and Taxation Code section 17742 based on the residence of fiduciaries and noncontingent beneficiaries.
Because these rules are state-specific and can differ sharply, a trust that owes little or nothing to one state may owe meaningful tax to another based purely on where a trustee or beneficiary lives. State treatment is outside the federal primary sources cited in this guide, and state-by-state analysis generally requires review with a qualified professional familiar with the relevant jurisdictions.
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Q3 Advisors is a registered investment adviser focused on retirement tax planning. This article is educational and is not advice; for guidance on your own circumstances, consult a qualified tax or financial professional.
Frequently asked questions
Who pays the taxes on an irrevocable trust?
It depends on the trust type and whether income is distributed. For a grantor trust, the grantor pays on Form 1040. For a non-grantor trust, the trust pays on Form 1041 for income it retains, at compressed brackets, while income distributed to beneficiaries is taxed to them through Schedule K-1 (Source: 2025 Instructions for Form 1041).
How does an irrevocable trust avoid taxes?
Irrevocable trusts do not eliminate income tax; they shift or defer it. Distributing income to lower-bracket beneficiaries moves it out of the compressed trust brackets via the income distribution deduction (Source: 2025 Instructions for Form 1041). Keeping assets outside the taxable estate can reduce estate tax, though under Rev. Rul. 2023-2 those assets generally forgo a basis step-up at death.
Do beneficiaries pay taxes on distributions from an irrevocable trust?
Often, yes, for income distributions. A non-grantor trust deducts distributed income up to distributable net income, and the beneficiary reports that income on the Schedule K-1 (Source: 2025 Instructions for Form 1041). Distributions of principal are generally not taxable to the beneficiary. The character of the income, such as dividends or capital gains, generally carries through.
Are irrevocable trusts subject to capital gains tax?
Yes. Capital gains of a non-grantor trust are generally allocated to principal and taxed at the trust level unless the instrument or trustee directs them out (Source: 2025 Instructions for Form 1041). For 2026 the 20% long-term rate for estates and trusts applies above $16,250, and retained gains can also face the 3.8% NIIT (Source: Rev. Proc. 2025-32; IRS Topic No. 559).
What is the tax rate for an irrevocable trust?
A non-grantor trust uses four ordinary rates: 10%, 24%, 35%, and 37%. For 2026 the 37% rate begins at $16,000 of taxable income (Source: Rev. Proc. 2025-32). Retained investment income can also carry the 3.8% net investment income tax, for a combined 40.8% at the top (Source: IRS Topic No. 559). A grantor trust is taxed at the grantor’s individual rates.
Does an irrevocable trust get a step-up in basis at death?
Generally only if the assets are included in the decedent’s taxable estate. In Revenue Ruling 2023-2, the IRS concluded that assets in an irrevocable grantor trust that are excluded from the grantor’s gross estate do not receive a section 1014 basis step-up at death (Source: Rev. Rul. 2023-2). Assets included in the estate generally do step up to date-of-death value.
What is the difference between a grantor and non-grantor trust?
A grantor trust is treated as owned by the grantor under IRC sections 671-679, so its income is a disregarded item reported on the grantor’s Form 1040. A non-grantor trust is a separate taxpayer that files Form 1041, pays tax at compressed brackets on retained income, and issues Schedule K-1 to beneficiaries for distributed income (Source: 2025 Instructions for Form 1041).
Does an irrevocable trust have to file a tax return?
A non-grantor trust generally must file Form 1041 if it has any taxable income, gross income of $600 or more, or a nonresident alien beneficiary (Source: IRS Instructions for Form 1041). A grantor trust’s income is generally reported on the grantor’s Form 1040 rather than through a separate trust tax return, subject to specific reporting methods.
How much income can an irrevocable trust earn before paying taxes?
Very little before the top rate applies. A non-grantor trust files Form 1041 once gross income reaches $600, and it reaches the 37% ordinary bracket at only $16,000 of taxable income for 2026 (Source: IRS Instructions for Form 1041; Rev. Proc. 2025-32). Distributing income to beneficiaries can move it out of these compressed brackets.
What is distributable net income (DNI)?
DNI is the limit on how much income a non-grantor trust can deduct for distributions and pass to beneficiaries. The income distribution deduction for amounts paid or required to be distributed is limited to DNI and figured on Schedule B of Form 1041 (Source: 2025 Instructions for Form 1041; IRC section 643). DNI also sets the character of income the beneficiary reports.
Sources
2025 Instructions for Form 1041, U.S. Income Tax Return for Estates and Trusts (IRS): https://www.irs.gov/instructions/i1041
Rev. Proc. 2025-32, 2026 inflation adjustments and OBBBA rate provisions (IRS): https://www.irs.gov/pub/irs-drop/rp-25-32.pdf
IRS Topic No. 559, Net Investment Income Tax: https://www.irs.gov/taxtopics/tc559
26 U.S.C. 1411, Net investment income tax (Cornell LII): https://www.law.cornell.edu/uscode/text/26/1411
26 U.S.C. 643, Definitions applicable to trusts (Cornell LII): https://www.law.cornell.edu/uscode/text/26/643
26 U.S.C. 663(b), 65-day rule (Cornell LII): https://www.law.cornell.edu/uscode/text/26/663
26 U.S.C. 642(b), Personal exemption for trusts and estates (Cornell LII): https://www.law.cornell.edu/uscode/text/26/642
Revenue Ruling 2023-2, basis of assets in irrevocable grantor trusts (IRS): https://www.irs.gov/pub/irs-drop/rr-23-02.pdf
IRS Publication 590-B, Distributions from IRAs: https://www.irs.gov/publications/p590b
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Disclaimer
This article is provided by Q3 Advisors for educational and informational purposes only. It is not tax, legal, or investment advice, and it is not a recommendation to adopt any strategy or take any action. Tax rules change and apply differently to each situation; the figures cited are for the years indicated and are drawn from the named IRS and statutory sources. Consult a qualified tax, legal, or financial professional regarding your own circumstances. Additional information about Q3 Advisors is available in its Form ADV.
