Trust Tax Bracket 2026 Compressed vs Individual Calculator

The compressed trust tax bracket is the single biggest tax inefficiency in modern estate planning. A non-grantor trust reaches the top federal ordinary rate of 37% at only $15,200 of retained taxable income in 2026 (per Rev. Proc. 2025-32), while a single individual does not pay 37% until $626,350. Distributing income to a lower-bracket beneficiary under IRC §661 carries the deduction to the trust and the income to the beneficiary's K-1, often saving $5,000-$30,000 in federal tax per year.

2026 Compressed Trust Brackets (Ordinary Income)

Per Rev. Proc. 2025-32, non-grantor trusts and estates pay ordinary tax at: 10% up to $3,250; 24% from $3,250 to $11,700; 35% from $11,700 to $15,200; 37% above $15,200. There are only four brackets compressed into a $15,200 window. A trust earning $50,000 of ordinary income owes roughly $16,500 in federal tax — about 33% effective. The same $50,000 in the hands of a single individual at the 22% bracket would cost about $6,500. The 2026 long-term capital gains thresholds for trusts are also compressed: 0% up to $3,250, 15% up to $15,200, 20% above $15,200.

How the §661 Distribution Deduction Works

Under IRC §661, a complex trust deducts the lesser of (a) actual distributions to beneficiaries, or (b) the trust's distributable net income (DNI). The beneficiary then includes that amount on their personal return via Schedule K-1, taxed at their individual rate. If the trust retains $50,000 of ordinary income, total federal tax is ~$16,500. If that same $50,000 is distributed to a beneficiary already in the 22% bracket, the beneficiary pays ~$11,000 and the trust pays $0 — a $5,500 annual saving. Distributions must occur in the tax year, with one critical exception: the §663(b) 65-day rule lets trustees treat distributions made within 65 days after year-end as paid on the last day of the prior year.

The Throwback Rule and Foreign Trusts

For most domestic non-grantor trusts created after 1996, the throwback rule (IRC §665-668) is dead — accumulation distributions are no longer taxed back to the year the income was earned. However, the rule still applies in two situations: (1) foreign non-grantor trusts distributing accumulated income to US beneficiaries face throwback plus an interest charge that can exceed the original tax, and (2) certain pre-1996 domestic trusts grandfathered in. If you are administering a foreign trust or a pre-1996 trust, model both scenarios before deciding whether to distribute or retain.

When Retention Beats Distribution

Distribution is not always the answer. (1) Asset protection — distributing income strips spendthrift protection. (2) Net investment income tax (NIIT) — trusts pay NIIT on undistributed investment income above $15,200, but if the beneficiary is in a high-income household above the MAGI threshold, they still owe NIIT on the distribution. (3) State income tax arbitrage — a trust sited in a no-tax state (DE, NV, SD, WY) may retain income tax-free at the state level, while a beneficiary in CA or NY pays state tax on a distribution. (4) Discretionary distributions to minors — kiddie tax applies, and the child's unearned income above $2,700 (2026 est.) is taxed at the parents' marginal rate, eliminating the bracket arbitrage.

Last updated May 2026. Sources: IRC §1(e), §661, §663(b), §665-668; Rev. Proc. 2025-32 (2026 inflation adjustments).