Quick answer: up to 10.75% for 2026, since DC simply folds the gain into ordinary taxable income. See the full cost picture in the DC probate real estate sale calculator.
No preferential rate for long-term gains
Seven brackets, one schedule for everyone
DC's 2026 income tax runs seven progressive brackets ranging from 4% to 10.75%, with the top rate applying to income above $1,000,000 — DC doesn't use different brackets by filing status the way many states do.
Notably higher than its immediate neighbors
DC's 10.75% top rate is notably higher than Maryland's or Virginia's top state rates, making DC one of the higher-tax jurisdictions in the immediate region for anyone selling a house here.
A separate question from the DC estate tax
DC's own estate tax applies only above roughly $4.71 million (2025 threshold) — a distinct calculation from the income tax on the sale's gain, and one that affects far fewer estates.
A local probate attorney can review your estate — many offer a free consultation.
The same bracket schedule applies to every sale that closes within the District, since there are no counties to vary by.