Capital Gains Tax Calculator
Long-term capital gains get their own lower tax rates, but which rate you pay depends on your other income. Enter your gain and your other taxable income to see the estimated tax on those gains.
How this math works
The calculator stacks your long-term gain on top of your other taxable income, then applies the 2025 single-filer long-term rates of 0 percent, 15 percent, and 20 percent across their thresholds. Different parts of the gain can fall into different rate bands.
The result is the blended tax on the gain, reflecting how much of it is taxed at each rate.
Common questions
What counts as a long-term gain?
A gain is long-term when you held the asset for more than one year before selling. This calculator covers long-term gains only.
How are short-term gains taxed?
Short-term gains, on assets held a year or less, are taxed as ordinary income at your regular brackets rather than the lower long-term rates, so they are not modeled here.
Why does my other income matter?
The long-term rate brackets are based on your total income. Stacking the gain on top of your other income decides how much of it falls in the 0, 15, or 20 percent band.
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