A revocable living trust becomes irrevocable at the grantor's death, requires its own EIN, and starts filing Form 1041 as a separate taxpayer hitting the 37% bracket at just $15,650 of taxable income for 2025. Five years earlier, the same trust would have reached that bracket as a grantor trust never. Subchapter J turns on who holds the powers, not what the document is called.
A trust is a fiduciary arrangement where a grantor transfers property to a trustee who holds it for one or more beneficiaries. Federal tax classification turns on who controls the property and how income moves.
Simple trust. A trust that (1) must distribute all fiduciary accounting income currently, (2) makes no distributions of corpus, and (3) makes no charitable contributions during the year. Personal exemption is $300.
Complex trust. Any non-grantor, non-simple trust. May accumulate income, distribute corpus, or contribute to charity. Personal exemption is $100.
Grantor trust. A trust where the grantor (or a non-adverse party with grantor-like powers) retains powers described in §§671-679: power to revoke (§676), reversionary interest > 5% (§673), power to...
Common mistakes
- Treating an "irrevocable" trust as a separate taxpayer when a §675 swap power exists. The substitution power makes it a grantor trust despite the label, so income flows to the grantor.
- Including capital gains in DNI by default. Capital gains stay at the trust unless the instrument, local law, or a consistent trustee practice allocates them to income, or they are actually distributed.
- Forgetting the $300 vs $100 exemption distinction. A trust that distributes all income AND avoids both corpus distributions and charitable contributions gets $300; any failure drops it to $100.
Bottom line
- Form 1041 filed by estates with gross income ≥ $600, trusts with gross income ≥ $600, any taxable income, or any nonresident-alien beneficiary
- Exemptions: simple trust $300, complex trust $100, estate $600, qualified disability trust $5,050 (2025)
- DNI equals taxable income before the distribution deduction, plus the personal exemption, plus net tax-exempt interest, minus net capital gains allocated to corpus
- Compressed brackets hit 37% at $15,650 (2025) and NIIT 3.8% applies on undistributed NII above the same threshold
Exam shortcut
If the facts mention "power to substitute property of equivalent value," "power to revoke," or "income for the grantor's spouse," answer grantor trust with no separate tax. If capital gains are silent in the facts, assume they stay at the trust and are NOT in DNI; only ordinary items pass through pro rata on the K-1.
The full lesson (about 3,067 words, 20 min read) adds 2 worked examples, all 6 common mistakes, a self-check, free in the app.
Learning objectives
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