Long-Term Capital Gains Tax Calculator

Enter gain amount and income, and the capital gains tax calculator applies 0%, 15%, or 20% rate based on brackets. Useful for investors. Use it as a long term capital gains tax estimator, an investment profit tax calculator, or a federal capital gains tax tool.

Capital Gains Tax Calculator

Estimate your 2026 U.S. federal long-term capital gains tax based on taxable income, filing status, and investment gains.

Filing Information

Filing Status

Income & Capital Gain

Taxable Income Before Capital Gains

Enter taxable income before adding the long-term capital gain.

Regular Long-Term Capital Gain

This calculator assumes the gain qualifies for the regular long-term capital gains rates.

Optional Special Gains

Include a special-rate capital gain

Special Gain Type

Special-Rate Gain Amount

Additional Tax

Include 3.8% Net Investment Income Tax (NIIT)

NIIT is calculated separately using the applicable statutory threshold.

2026 Capital Gains Tax Estimate

ESTIMATED FEDERAL CAPITAL GAINS TAX

Regular long-term capital gains tax plus applicable NIIT/special-rate tax.

Total Taxable Income

Total Investment Gain

Tax on Regular Gain

Effective Rate on Gains

Tax Breakdown

2026 federal thresholds: Regular long-term capital gains generally use 0%, 15%, and 20% rates. The 2026 maximum 0% and 15% thresholds depend on filing status.

This calculator is an estimate for U.S. federal taxes and does not replace a tax return calculation. It does not calculate state income tax, deductions, credits, capital-loss carryovers, qualified business stock rules, home-sale exclusions, or every possible tax adjustment. Taxable income and MAGI are not always the same, so NIIT results are an estimate when using this calculator.

Enter your information and select Calculate Tax to see your estimate.