The grantor trust rules in sections 671 through 679 of the Internal Revenue Code decide when the person who created a trust (the grantor) is taxed on the trust’s income as if the assets were still personally owned. When any trigger in those sections applies, the trust’s income, deductions, and credits flow through to the grantor’s individual return, and the trust itself owes no federal income tax.1Office of the Law Revision Counsel. 26 USC 671 – Trust Income, Deductions, and Credits Attributable to Grantors and Others as Substantial Owners Whether a trust qualifies turns on specific powers or interests the grantor kept when the trust was set up. The sections below walk through each trigger and what it means in practice.
What a Grantor Trust Is
A grantor trust is any trust where the Internal Revenue Code treats the grantor (or in some cases another person) as the owner of all or part of the trust for income tax purposes. Ownership for income tax is a separate question from ownership for estate tax or state property law, and the same trust can be a grantor trust for income tax while still being a completed gift for estate tax. The practical consequence is simple: the trust files no tax of its own on the portion treated as owned, and that income lands on the owner’s Form 1040 instead.
Before any trigger matters, section 672 defines the people whose relationship to the trust decides whether the rules apply.2Office of the Law Revision Counsel. 26 USC 672 – Definitions and Rules An adverse party is someone with a real financial stake in the trust that would be hurt by a particular power being exercised, usually a beneficiary who would lose an inheritance. A power held only by an adverse party rarely triggers grantor trust status. A nonadverse party is anyone else, and a power held by a nonadverse party is treated almost the same as a power held by the grantor.
Within the nonadverse group, a narrower category called related or subordinate parties includes the grantor’s spouse (if living together), parents, descendants, siblings and half-siblings, employees of the grantor, and employees of a corporation where the grantor and the trust together hold significant voting control. The law presumes these people follow the grantor’s wishes unless the grantor shows otherwise. Nieces, nephews, cousins, grandparents, and in-laws are not on that list; they can still be nonadverse, but they carry no automatic presumption of subservience.
Spousal Attribution: Why You Can’t Hand the Power to Your Spouse
Section 672(e) treats any power or interest held by the grantor’s spouse as if the grantor held it personally. This applies to someone already married to the grantor when the power was created and to someone who marries the grantor later (for periods after the marriage). A spouse legally separated under a divorce or separate maintenance decree is no longer treated as married for this purpose.2Office of the Law Revision Counsel. 26 USC 672 – Definitions and Rules
The point is practical. Drafting around the grantor trust rules by giving a problematic power to a spouse instead of the grantor accomplishes nothing. If the spouse holds a reversionary interest, a power to revoke, or any other trigger, the grantor is taxed on the trust’s income as if holding it personally.
The Seven Triggers That Create Grantor Trust Status
Reversionary Interests (Section 673)
A reversionary interest is any arrangement where the trust property could come back to the grantor or the grantor’s spouse. If the actuarial value of that possible return is more than 5% of the trust portion when the trust is created, the grantor is treated as the owner of that portion.3Office of the Law Revision Counsel. 26 USC 673 – Reversionary Interests The valuation assumes that any discretion will be exercised in the way most favorable to the grantor.
One carve-out protects trusts for young family members. If the reversion only kicks in on the death of a lineal descendant of the grantor who holds all the present interests in that portion, the 5% test does not apply as long as that beneficiary is under 21. Without this exception, trusts for minor children would often become grantor trusts just because young beneficiaries have a meaningful chance of dying before adulthood.
Power to Control Who Benefits (Section 674)
Section 674 is the broadest trigger. Any power held by the grantor or a nonadverse party to control who benefits from the trust, how much they receive, or when, makes the grantor the owner. The reasoning is direct: if you can redirect who gets the money, you haven’t really parted with it.4Office of the Law Revision Counsel. 26 USC 674 – Power to Control Beneficial Enjoyment
Because that rule would swallow nearly every discretionary trust, the statute carves out several important exceptions. A power exercisable only by the grantor’s will doesn’t trigger the rule. A power to distribute principal is safe if constrained by an ascertainable standard such as health, education, support, or maintenance (practitioners call this a HEMS standard). A power to accumulate income is permitted if the accumulated amount must ultimately be paid to the current income beneficiary, their estate, or their appointees. And a trustee who is neither the grantor nor part of a group where more than half are related or subordinate parties can hold broad discretion over distributions without triggering grantor trust status. That last exception, the independent trustee rule, is what lets a grantor build a flexible discretionary trust without becoming its tax owner, provided the trustee’s independence is real.
Administrative Powers (Section 675)
Section 675 catches four powers that look administrative but let the grantor use the trust’s property as personal property.5Office of the Law Revision Counsel. 26 USC 675 – Administrative Powers
- A power to buy, exchange, or otherwise deal with trust assets for less than full value.
- A power to borrow trust assets or income without adequate interest or security, unless an independent trustee holds a general lending authority that permits loans to anyone on the same terms.
- An actually outstanding loan from the trust to the grantor that hasn’t been fully repaid, with interest, before the taxable year starts. The exception is a loan carrying adequate interest and security that was made by an independent trustee.
- Certain non-fiduciary administrative controls: voting or directing votes on stock where the grantor and trust together hold significant voting control, controlling investments in that same corporate stock, and the power to reacquire trust assets by substituting other property of equivalent value.
The substitution power is included deliberately in many modern plans. Swapping assets of equal value in and out lets the grantor manage the income tax basis of what sits inside the trust without changing the trust’s total value. For the power to work without IRS pushback, the trustee must have a fiduciary duty to verify that substituted property truly has equivalent value.
Power to Revoke (Section 676)
If the grantor or a nonadverse party can take the trust property back, the grantor is the owner. This is why every ordinary revocable living trust is a grantor trust: as long as the grantor can undo the transfer, the trust provides no income tax separation.6Office of the Law Revision Counsel. 26 USC 676 – Power to Revoke The power doesn’t have to be absolute; a joint power with a nonadverse party counts. If the power is contingent on a future event and the delay is long enough that a reversionary interest in the same position wouldn’t clear the 5% threshold under section 673, the grantor isn’t treated as the owner until the event occurs.
Income for the Benefit of the Grantor (Section 677)
Section 677 targets trust income that can flow back to the grantor or the grantor’s spouse, even indirectly. The grantor is the owner of any portion whose income can, without an adverse party’s consent, be distributed to the grantor or spouse, accumulated for future distribution to either, or used to pay premiums on life insurance covering either.7Office of the Law Revision Counsel. 26 USC 677 – Income for Benefit of Grantor The mere possibility is enough; no actual distribution has to happen.
The insurance premium rule catches planners who miss it. If trust income can be used to pay premiums on the grantor’s life insurance, the grantor is taxed on that income regardless of who owns the policy. The only exception is a policy irrevocably designated for charitable purposes under section 170(c).
A separate rule applies when trust income is used to support someone the grantor is legally obligated to support. Here, the grantor is taxed only on amounts actually applied toward the support obligation, not on amounts that merely could be used that way. What counts as a legal support obligation is a question of state law, which varies, particularly on a parent’s duty to support an adult child and on obligations between spouses.
Non-Grantor Treated as Owner (Section 678)
Section 678 extends the concept to someone other than the grantor. If any person holds a power, exercisable solely by that person, to take the trust’s income or principal for themselves, that person is treated as the owner of the portion subject to the power.8Office of the Law Revision Counsel. 26 USC 678 – Person Other Than Grantor Treated as Substantial Owner A priority rule prevents double taxation: if the original grantor is already treated as the owner under sections 671 through 677, the grantor wins and the beneficiary is not treated as an owner.
This section most often comes up with Crummey withdrawal powers, which give a beneficiary a short window (often 30 to 60 days) to withdraw a contribution to the trust so the gift qualifies as a present-interest gift under the annual gift tax exclusion. The exclusion is $19,000 per recipient for 2026.9Internal Revenue Service. Whats New – Estate and Gift Tax While the window is open, the beneficiary is treated as owner of the contributed amount. If the beneficiary lets the power lapse, the lapse can be treated as a release, which keeps the beneficiary in the owner role. The 5-and-5 rule limits this: a lapse is treated as a release only to the extent it exceeds the greater of $5,000 or 5% of the trust’s assets.10Office of the Law Revision Counsel. 26 USC 2514 – Powers of Appointment Anything within that safe harbor is ignored.
Foreign Trusts With a U.S. Beneficiary (Section 679)
Section 679 is a blunt anti-abuse rule. Any U.S. person who transfers property to a foreign trust is treated as the owner if the trust has even one U.S. beneficiary, whether or not the transferor kept any of the powers in sections 673 through 677.11Office of the Law Revision Counsel. 26 USC 679 – Foreign Trusts Having One or More United States Beneficiaries The point is to stop U.S. taxpayers from using offshore trusts to defer income tax. A trust is treated as having a U.S. beneficiary unless its terms specifically prohibit any distribution to a U.S. person and no distribution to a U.S. person is ever actually made.
Reporting obligations are separate and strict. U.S. persons who create or transfer property to a foreign trust must file Form 3520, and a foreign trust with a U.S. owner must file Form 3520-A.12Office of the Law Revision Counsel. 26 USC 6048 – Information With Respect to Certain Foreign Trusts Penalties start at the greater of $10,000 or a percentage of the unreported amount (35% for unreported contributions and distributions, 5% for ownership and Form 3520-A failures), and $10,000 continuation penalties accrue for each 30-day period after the IRS sends a notice and 90 days pass without a filing.13Internal Revenue Service. International Information Reporting Penalties These penalties can stack toward the full value of the trust.
How a Grantor Trust Reports Income
When a whole trust is treated as owned by one grantor, the trustee has two simplified alternatives instead of filing a full Form 1041.14eCFR. 26 CFR 1.671-4 – Method of Reporting
Under direct reporting (the “1040 method”), the trustee gives all payors the grantor’s name and Social Security number along with the trust’s address. All 1099s and K-1s are issued in the grantor’s name, and the grantor reports everything on the personal return. The trustee files no return with the IRS but must give the grantor an annual statement of income, deductions, and credits.
Under the alternate 1099 method, the trustee gives payors the trust’s name, address, and taxpayer identification number, then files Forms 1099 showing the trust as payor and the grantor as payee, along with an annual statement to the grantor. This requires the trust to have its own EIN.
If neither method is used, the trustee files Form 1041 and attaches a statement showing that all items are reportable by the grantor. Many revocable living trusts just use the grantor’s Social Security number for life, and the trust is effectively invisible to the IRS.
What Changes When the Grantor Dies
Death ends grantor trust status, because the person whose powers or interests triggered the status is gone. The trust can no longer use the grantor’s Social Security number, has to get its own EIN, and begins filing Form 1041 as a separate taxpayer under the compressed trust tax brackets.
For revocable trusts, the executor and trustee can jointly elect under section 645 to treat the trust as part of the decedent’s estate for income tax purposes.15United States Code. 26 USC 645 – Certain Revocable Trusts Treated as Part of Estate The election is irrevocable and lets the trust and estate file a single return for a limited period after death, which can simplify administration and open up elections otherwise available only to estates.
Whether trust assets get a stepped-up basis at death depends on whether they are included in the grantor’s gross estate. Assets in a revocable trust are generally included under section 2038 because the grantor kept the power to alter, amend, or revoke, and those assets take a new basis equal to fair market value at death under section 1014.16Office of the Law Revision Counsel. 26 USC 2038 – Revocable Transfers Assets in an irrevocable grantor trust that are not included in the gross estate are treated differently. In Revenue Ruling 2023-2, the IRS concluded that such assets do not qualify for a basis step-up, because section 1014 requires property to be acquired or passed from a decedent, and property already given away through an irrevocable trust doesn’t meet that test even if the grantor was paying the income tax on the trust’s earnings.
When Grantor Trust Status Is Triggered on Purpose
Estate planners often trigger grantor trust status deliberately. The structure is called an intentionally defective grantor trust (IDGT), and it works because the income tax rules and the estate tax rules run independently. A trust can be set up so the grantor is the owner for income tax under sections 671 through 679 while the gift is complete and the assets stay out of the estate under sections 2036 and 2038.
The usual trigger is a power to substitute assets of equivalent value under section 675(4)(C). The grantor can swap assets in and out, which creates grantor trust status for income tax, but because the exchange must be for equal value, the beneficiaries’ economic interests aren’t reduced and the assets aren’t pulled back into the estate. A power to borrow from the trust without adequate security under section 675(2) is another common trigger.
The payoff is twofold. Because the grantor pays the income tax, the trust’s assets grow undiminished by tax, which is itself a tax-free transfer of value to the beneficiaries. And transactions between the grantor and the trust are ignored for income tax, so the grantor can sell appreciated assets to the trust in exchange for a promissory note without recognizing capital gain, letting the appreciation pass to beneficiaries free of income tax.
The trade-off, confirmed by Revenue Ruling 2023-2, is that IDGT assets not included in the gross estate get no basis step-up at death. For highly appreciated assets this can leave the beneficiaries with a significant built-in capital gains liability. Some planners address this late in the grantor’s life by using the substitution power to swap low-basis assets out of the trust (so they land in the estate and get a step-up) in exchange for high-basis assets of equal value.