District of Columbia Capital Gains Tax 2025
This calculator works out the total tax on a capital gain in District of Columbia for the 2025 tax year — the federal 0% / 15% / 20% long-term rate, the 3.8% Net Investment Income Tax for high earners, and the District of Columbia state portion. District of Columbia taxes capital gains as ordinary income.
Federal long-term gains (assets held over one year) are taxed at 0%, 15%, or 20% by total taxable income. For 2025 the 0% band runs to $48,350 (single) or $96,700 (married filing jointly), 15% up to $533,400 (single) or $600,050 (joint), and 20% above. Short-term gains are taxed at ordinary federal rates. High earners also owe the 3.8% Net Investment Income Tax (NIIT) on the lesser of the gain and modified AGI over $200,000 (single) / $250,000 (joint) / $125,000 (married filing separately).
Enter your gain, your other taxable income, your filing status and holding period below. The District of Columbia taxes capital gains as ordinary income; the top marginal rate is 10.75%. Everything runs in your browser — no amounts or personal data are transmitted.
Estimate, not tax advice. The District of Columbia portion is modelled at the state’s top marginal rate, so your actual state tax may be lower; local/city taxes and special-rate assets (collectibles, qualified small-business stock, depreciation recapture) are not included. Verify with the IRS and the District of Columbia tax authority.
What makes DC’s capital gains treatment distinctive
The District of Columbia does not carve out a separate, preferential rate for capital gains the way some states do. Instead, the DC income tax treats every dollar of capital gain as ordinary income, taxed under the same graduated schedule that applies to wages and salaries — a top rate of 10.75% that kicks in at high income levels. This means DC residents pay one of the steeper combined capital-gains burdens in the country once federal rates are layered in, because there is no state-level break for long-term holding periods.
The three-layer structure for high earners
For a single DC filer with a large long-term gain, the tax burden has up to three federal components plus the DC layer:
- Federal long-term rate (0%, 15%, or 20%) — determined by where the gain pushes total taxable income relative to the 2025 thresholds.
- Net Investment Income Tax (3.8%) — applies on the lesser of net investment income and the amount modified AGI exceeds $200,000 (single) or $250,000 (joint). These thresholds are not inflation-adjusted.
- DC income tax (up to 10.75%) — applied to the gain as ordinary income under DC’s bracket schedule.
A high earner in DC can therefore face a combined marginal rate on long-term capital gains approaching the mid-30s percent range when all three layers stack. Short-term gains (assets held one year or less) face ordinary federal rates instead of the preferential 0/15/20% structure, which makes them considerably more expensive to realise.
Short-term vs. long-term: the key distinction
The IRS uses a bright-line rule: sell an asset you held for more than one year and the gain is long-term; sell within one year and it is short-term. The holding period begins the day after you acquire the asset and ends on the sale date. For most investors, planning the timing of a sale around this boundary is one of the most straightforward ways to reduce the federal portion of the tax — though DC offers no equivalent incentive since it taxes both at ordinary rates regardless.
Assets with special federal rates
Certain assets are excluded from the standard 0/15/20% long-term rate even for assets held more than one year: collectibles (art, coins, stamps) face a maximum federal rate of 28%; depreciation recapture on real property (Section 1250 unrecaptured gain) is capped at 25%; and qualified small-business stock (Section 1202) may be fully or partially excluded from federal tax. This calculator covers the standard long-term and short-term rates — if your gain involves these special categories, consult a tax professional.