Capital Gains Tax Calculator
Estimate 2026 U.S. long-term capital gains tax using filing status and taxable income.
Last updated: July 2026
Estimated long-term capital gains tax
$0.00
- Net long-term gain: $0.00
- Gain taxed at 0%: $0.00
- Gain taxed at 15%: $0.00
- Gain taxed at 20%: $0.00
On this page
Quick summary: Estimate 2026 U.S. long-term capital gains tax using filing status and taxable income. Enter the requested values, calculate, review the result, and compare more than one realistic scenario before making a decision.
Read the complete guide
What this calculator does
The Capital Gains Tax Calculator estimates tax on investment gains from the difference between sale value and cost basis under the rate assumptions entered.
How to use the calculator step by step
Enter sale proceeds, cost basis, holding-period information, and tax rate inputs requested by the page. Include eligible transaction costs in basis or proceeds only if the calculator's method expects them.
How the calculation works
Capital gain generally equals sale proceeds minus adjusted cost basis. Tax may depend on whether the gain is classified as short-term or long-term and on the applicable tax rate.
Worked example and scenario testing
If an asset is sold for 15,000 and adjusted basis is 10,000, the gain is 5,000 before considering any additional adjustments. The tax on that gain depends on the applicable rules and holding period.
How to interpret your result
The calculator estimates tax on the gain, not on the full sale price. A higher sale price can still produce little or no taxable gain when the adjusted basis is also high.
Accuracy, assumptions, and limitations
Loss offsets, wash-sale rules, exclusions, depreciation recapture, surtaxes, jurisdictional taxes, and changing tax law may not be represented.
Common mistakes to avoid
Do not calculate tax on total sale proceeds when only the gain is taxable. Also verify whether the entered basis has been adjusted for fees, improvements, or prior depreciation where applicable.
Privacy and browser-based calculations
Use only hypothetical transaction values. Do not enter brokerage account numbers, taxpayer IDs, or security credentials.