Internal Revenue Code Section 672 supplies the definitions that decide who pays income tax on a trust’s earnings under the grantor trust rules. It sets out what makes someone an adverse party, what makes someone a nonadverse party, which relatives and employees count as related or subordinate, when a spouse’s powers are attributed to the grantor, and when the rules do not reach a foreign trust. Those terms do the real work in Sections 673 through 677, where the tax consequences actually attach.
Who Counts as an Adverse Party
An adverse party is someone who has a substantial beneficial interest in the trust and whose interest would be affected by exercising or failing to exercise a power they hold over the trust.1Office of the Law Revision Counsel. 26 U.S. Code 672 – Definitions and Rules Both conditions have to be true at the same time. A beneficial interest by itself is not enough; that interest has to be genuinely at stake in how the power gets used.
Take a remainderman who is entitled to the trust principal after the income beneficiary dies. If the remainderman also holds the power to return that principal to the grantor, exercising the power would erase their own inheritance. The interest is adverse to the power, so the remainderman qualifies as an adverse party. Self-interest, in other words, is treated as a natural brake on the grantor’s ability to steer the trust.
Two clarifications from the Treasury regulations matter in practice. A trustee is not adverse simply because they are a trustee. Someone who holds a general power of appointment over trust property, on the other hand, is automatically treated as having a beneficial interest. An interest is “substantial” if its value is not insignificant relative to the total value of the property subject to the power.2GovInfo. 26 CFR 1.672(a)-1 – Definition of Adverse Party A remote contingent interest or a bare expectancy generally does not clear that bar.
Who Counts as a Nonadverse Party
A nonadverse party is anyone who is not an adverse party.1Office of the Law Revision Counsel. 26 U.S. Code 672 – Definitions and Rules The category is deliberately broad. It sweeps in people with no beneficial interest at all, such as an independent corporate trustee or a friend named as trust protector. It also sweeps in people who do have a beneficial interest but whose specific interest would not be harmed by the power in question.
The same person can be adverse as to part of a trust and nonadverse as to the rest. A beneficiary entitled to one-third of the income is adverse only with respect to that third. As to the other two-thirds, they are nonadverse, because exercising or not exercising a power over that portion would not touch their share.
This split classification carries the tax weight of the whole regime. In Sections 674 through 677, Congress drew the line so that a power exercisable by the grantor or a nonadverse party triggers grantor trust treatment, while the same power held only by an adverse party does not. The reasoning is that a nonadverse party has no personal financial reason to push back against the grantor’s wishes.
Related or Subordinate Parties
A related or subordinate party is a specific subset of nonadverse party. Section 672(c) identifies people whose relationship with the grantor makes them likely to follow the grantor’s lead.1Office of the Law Revision Counsel. 26 U.S. Code 672 – Definitions and Rules The statute names:
- The grantor’s spouse, if living with the grantor
- The grantor’s parent, child, or sibling
- An employee of the grantor
- A corporation, or any employee of a corporation, in which the stock holdings of the grantor and the trust are significant for voting control
- A subordinate employee of a corporation in which the grantor is an executive
Any related or subordinate party is presumed subservient to the grantor in using trust powers. That presumption can be rebutted, but only by a preponderance of the evidence.1Office of the Law Revision Counsel. 26 U.S. Code 672 – Definitions and Rules In practice, that is a hard showing. Naming an adult child as the person who decides how trust income is distributed may feel like giving up control, but the presumption is that the child will do what the grantor wants.
Spousal Attribution Under 672(e)
Section 672(e) treats the grantor as holding any power or interest held by the grantor’s spouse.1Office of the Law Revision Counsel. 26 U.S. Code 672 – Definitions and Rules It applies whether the spouse held the power when the trust was created or acquired it later by marrying the grantor.
Legal separation or divorce ends the attribution. Once a couple is legally separated under a decree of divorce or separate maintenance, they are no longer treated as married for this purpose. While the marriage is intact, anything the spouse can do with the trust is attributed to the grantor. Giving your spouse sole power to distribute trust income to herself does not sidestep grantor trust treatment; the power is treated as yours.
Powers Subject to a Waiting Period
Section 672(d) closes a workaround. A person who holds a power is still treated as holding it even if exercise requires advance notice or takes effect only after a waiting period.3GovInfo. 26 U.S. Code 672 – Definitions and Rules Attaching a 30-day notice requirement to a revocation power does not change the analysis. The power exists, and the person who holds it is classified as adverse or nonadverse the same way.
The Foreign Trust Limitation in 672(f)
Section 672(f) sets a limit that runs across the entire grantor trust regime. The rules apply only to the extent they result in income being reported by a U.S. citizen or resident or a domestic corporation.4eCFR. 26 CFR 1.672(f)-1 – Foreign Persons Not Treated as Owners If a foreign person would otherwise be treated as the owner under Sections 673 through 677, the grantor trust rules do not apply to that portion unless a U.S. taxpayer is picking up the income.
The exceptions are narrow. The rules can still reach a foreign-owned trust if the grantor retains the power to revest trust property in themselves, or if the trust is owned by certain foreign corporations treated as domestic under the regulations. These exceptions exist to prevent foreign trusts from being used to defer U.S. tax on income that would otherwise be taxable.
Where the Definitions Do Their Work
Section 672 does not tax anyone by itself. It supplies the vocabulary for Sections 674 through 677, which name specific powers that cause the grantor to be taxed on trust income depending on who can exercise them. The pattern is consistent across all four: if the grantor or a nonadverse party can act without an adverse party’s consent, the grantor is treated as the owner.
Section 674 – Power to Control Beneficial Enjoyment
Section 674 is the broadest trigger. If the grantor or any nonadverse party can control who benefits from the trust’s income or principal without an adverse party’s approval, the grantor is treated as the owner.5Office of the Law Revision Counsel. 26 U.S. Code 674 – Power to Control Beneficial Enjoyment An independent corporate trustee with no beneficial interest is nonadverse, so unless one of the narrow exceptions in Section 674(b) through (d) applies, the grantor is taxed on the trust’s income.
Section 675 – Administrative Powers
Section 675 targets administrative powers that give the grantor economic leverage over trust assets without redirecting distributions. The grantor is treated as the owner if the grantor or a nonadverse party, without an adverse party’s consent, can enable the grantor to buy trust assets for less than fair market value or borrow trust funds without adequate interest or security.6Office of the Law Revision Counsel. 26 U.S. Code 675 – Administrative Powers The related-or-subordinate concept shows up directly here: a loan with adequate interest and security avoids the trigger only if the lending trustee is neither the grantor nor a related or subordinate trustee subservient to the grantor.
Section 676 – Power to Revoke
Section 676 is the most intuitive. If the grantor or a nonadverse party can revoke the trust and return the assets to the grantor, the grantor is taxed on the income.7Office of the Law Revision Counsel. 26 U.S. Code 676 – Power to Revoke Revocable living trusts are grantor trusts for exactly this reason. If revocation requires the consent of an adverse party, however, the grantor is not treated as the owner under Section 676.
Section 677 – Income for the Grantor’s Benefit
Section 677 covers trust income that can flow back to the grantor or the grantor’s spouse. If income can be distributed to, accumulated for, or used to pay life insurance premiums for the grantor or spouse, and this can happen without an adverse party’s approval or at the discretion of the grantor or a nonadverse party, the grantor is treated as the owner.8Office of the Law Revision Counsel. 26 U.S. Code 677 – Income for Benefit of Grantor Spousal attribution amplifies the reach: income that can be directed to the spouse at the spouse’s own discretion still triggers grantor trust status because the power is attributed to the grantor.