Keep it in the trust, or send it out?

The facts, in one place.

Six quotable sentences on where trust income is taxed, 2026 figures.

1. A non-grantor trust reaches the 37 percent bracket at $16,000 of taxable income in 2026; a single person reaches it at $640,600, a couple at $768,700 (Rev. Proc. 2025-32). The 3.8 percent surtax on a trust's retained investment income begins at the same $16,000 (§ 1411(a)(2)).
2. Income the trust distributes is deducted by the trust and taxed to the beneficiary instead, up to distributable net income, and keeps its character on the way out (§§ 651, 652, 661, 662). Distributed interest is interest to the beneficiary; distributed dividends are dividends.
3. Example: $50,000 of dividends retained costs the trust $17,723 in tax and surtax; distributed to a single beneficiary with $60,000 of other income it costs $11,086. Distributing saves $6,637 this year.
4. The surtax follows the income too, but at the beneficiary's threshold, $200,000 single or $250,000 joint of modified adjusted gross income, rather than the trust's $16,000.
5. Capital gains are the exception: unless the trust instrument or state law puts them in distributable net income, they stay in the trust and are taxed there, at the trust's compressed thresholds.
6. The trustee's decision is not only tax: a distribution leaves the trust's protection and lands in the beneficiary's estate, creditors' reach, and divorce. The 65-day election lets a distribution made by early March count for the prior year (§ 663(b)).

Where each rate begins.

The compressed trust brackets beside the individual ones.

How the choice works.

A non-grantor trust is its own taxpayer, with brackets so compressed that the top rate and the 3.8 percent surtax both begin at a few thousand dollars of income. A beneficiary reaches the same rate hundreds of thousands of dollars later. So the trustee's yearly question is whether to keep the income in the trust and pay the trust's tax, or distribute it, deduct it, and let the beneficiary pay at their own rates on top of their own income. The income keeps its character on the way out: distributed dividends are dividends to the beneficiary, and the surtax follows, but at the beneficiary's threshold.

The calculator runs both. Retained: the trust's ordinary tax from the compressed table, plus the surtax on the investment part above the trust's threshold. Distributed: the beneficiary's tax on their own income plus the distribution, less the tax on their own income alone, plus the surtax on the distributed investment income above the beneficiary's threshold. The difference is the saving. What the calculator cannot weigh is why the trust exists: a distribution leaves its protection, and capital gains usually stay behind regardless.

Methodology.

1. Inputs. The trust's taxable income before any distribution deduction, the share of it that is investment income, the beneficiary's own taxable income, and the beneficiary's filing status. The whole amount is taken as within distributable net income.
2. Retained. The estates-and-trusts table for the year (§ 1(e); the revenue procedure) on the income, plus 3.8 percent on the investment part above the top bracket's start (§ 1411(a)(2)): the trust engine already on this site.
3. Distributed. The beneficiary's ordinary tax on their income plus the distribution, less on their income alone (§§ 651, 661: the trust deducts, the beneficiary includes); plus 3.8 percent on the smaller of the distributed investment income and the excess of the beneficiary's income over their threshold (§ 1411(b)).
4. The comparison. Retained less distributed; the marginal rate each way is the rate on the last dollar, surtax included where it applies.
5. Validation. A pinned case of $50,000 of dividends against a single beneficiary with $60,000, computed by hand from both tables; and a top-bracket beneficiary already over the surtax threshold, where the saving must be small. A transcription error fails the build.
6. Not modeled. Qualified dividends and long-term gains at their own rates (in either hand), capital gains outside distributable net income, fiduciary fees and the trust's exemption, the 65-day election, tier rules and separate shares, throwback, state trust taxation, and the beneficiary's other phase-outs. Educational, not advice.

Sources.

1. 1. Internal Revenue Service, Rev. Proc. 2025-32 — 2026 inflation adjustments (tax rate tables § 4.01, capital gains § 4.03, AMT exemptions § 4.10). Every 2026 bracket boundary and base amount for individuals and for estates and trusts; the 0% and 15% capital-gain thresholds; the AMT exemption amounts. Retrieved September 4, 2026; verified September 4, 2026.
2. 2. United States Code (Cornell LII), 26 U.S.C. § 1 — Tax imposed; § 1(e) estates and trusts; § 1(j) 2018-and-later rate structure made permanent. That estates and trusts have their own compressed rate schedule, and the four rates it uses. Retrieved September 4, 2026; verified September 4, 2026.
3. 3. United States Code (Cornell LII), 26 U.S.C. § 1411 — Imposition of tax (net investment income). The 3.8% surtax; for a trust, the threshold is the dollar amount at which the highest § 1(e) bracket begins; for individuals, $200,000 and $250,000, unindexed. Retrieved September 4, 2026; verified September 4, 2026.
4. 4. United States Code (Cornell LII), 26 U.S.C. §§ 651–652 and 661–662 — Deduction for distributions; inclusion by beneficiaries. That income a trust distributes (within distributable net income) is deducted by the trust and taxed to the beneficiary instead: the mechanism the comparison illustrates. Retrieved September 4, 2026; verified September 4, 2026.

Revision history.

This tool reads the federal record; its history is below.

September 4, 2026

First release of the federal income-tax record for 2026 and the trust income-tax tool: the estates-and-trusts table, the single and joint tables for comparison, capital-gain thresholds, AMT exemptions, the § 1411 trust threshold rule, and the § 642(b) exemptions, all from Rev. Proc. 2025-32 and the Code.

Canonical address: https://consideratecapital.com/tools/trust-distribute-or-retain