Capital Gains Tax Calculator

Short-term or long-term -- and what it costs you

Purchase price$

Sale price$

Months held

Your ordinary income tax rate (short-term)%

Your long-term capital gains rate%

Assumed inflation%

Capital gain

sale minus purchase price

Estimated tax owed

Net gain after tax

Holding period

Inflation-adjusted (real) gain

purchase price adjusted for inflation since purchase

Simplified: assumes a single flat rate for short-term (taxed as ordinary income at your marginal bracket) and long-term (0%, 15%, or 20% federal, based on income) gains, and does not model state tax, the Net Investment Income Tax surcharge, or offsetting capital losses. Set the two rate sliders to your actual brackets for a closer estimate, and treat this as directional, not a tax filing.