Capital Gains Tax Calculator
Work out capital gains tax from sale proceeds, cost basis, selling costs and the rate that applies to you.
Work out the tax on a gain
Frequently Asked Questions
Proceeds less basis and selling costs, times the rate you enter. The rate depends on how long you held the asset, your income and where you live, so it is a field rather than a constant.
Use your own, for a period you can actually measure. A calculator like this is only as good as the inputs, and the most common error is using a number that covers a different period or a different set of costs.
No. Everything is worked out in your browser and nothing is sent anywhere or saved.
We do not publish one, deliberately. Benchmarks for these measures vary enormously by sector, stage and how each company defines the inputs, so a number quoted without those definitions tends to mislead more than it helps.