What the trust's protection costs, every year.

The facts, in one place.

Six quotable sentences on leaving money in trust, 2026 tables.

1. An inheritance left in a trust that keeps its income is taxed at the trust's compressed brackets: the top rate and the 3.8 percent surtax from $16,000 of income. Left outright, the same income is taxed at the heir's own rates on top of the heir's own income.
2. Example: $1,000,000 earning 4 percent. Kept in the trust, the $40,000 of yearly income costs $13,643 in tax and surtax; in the hands of a single heir with $80,000 of other income, $9,086. The trust pays $4,557 more a year.
3. Compounded over ten years with the after-tax income reinvested, the outright inheritance ends about $61,542 larger. That is the price of the trust's protection, in tax alone.
4. The drag disappears for an heir already in the top bracket: their rate is the trust's rate, and the trust's first $16,000 at lower rates makes it slightly cheaper.
5. A trust that distributes its income avoids the drag, because distributed income is taxed to the heir, but a trust that must distribute protects less. The distribute-or-retain tool prices that yearly choice.
6. What the trust buys is not in this number: protection from the heir's creditors, divorce, and own mistakes, control over timing, and a place for the money if the heir dies young. Those are the reasons trusts are used; the drag is what they cost.

The drag, by the heir's income.

The yearly and ten-year cost of the trust's brackets, which shrinks as the heir's income rises.

How the drag works.

An inheritance can be left outright, in which case what it earns is taxed to the heir at the heir's rates, or in a trust, in which case the trust is a taxpayer of its own. A trust that keeps its income pays at brackets so compressed that the top rate and the 3.8 percent surtax begin at a few thousand dollars, where an heir would reach them at hundreds of thousands. The difference, year after year, is the tax drag of the trust.

The drag is real but not the whole story. It shrinks as the heir's own income rises, and vanishes for an heir already at the top rate. A trust that distributes its income avoids it, at the cost of protecting less; the distribute-or-retain tool prices that choice each year. And what the trust buys, protection from the heir's creditors, divorce, and mistakes, control over timing, direction if the heir dies, is not in the number. The calculator prices the drag so it can be weighed against those.

Methodology.

1. Inputs. The inheritance, the yearly income it earns as a share, the heir's own taxable income and filing status, and the years to compound.
2. In the trust. The estates-and-trusts table on the income with the surtax above the trust's threshold (§ 1(e); § 1411(a)(2)): the trust engine already on this site.
3. Outright. The heir's ordinary tax on their income plus the inheritance's income, less on their income alone, plus the surtax on the smaller of that income and the excess over the heir's threshold (§ 1411(b)).
4. The years. Each path reinvests its after-tax income at the same yield; the gap is the difference in the balances at the end.
5. Validation. A middle-income heir, where the trust must pay more and the outright inheritance must end larger, and a top-bracket heir, where the trust must be slightly cheaper. A transcription error fails the build.
6. Not modeled. Qualified dividends and long-term gains at their own rates in either hand, capital gains inside the trust, trustee fees and the trust's exemption, distributions, state tax, and the value of the protection. 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/inheritance-in-trust-or-outright