Calculatort

Capital Gains Estimator

Estimate tax on an investment sale from proceeds, cost basis, and the rate that applies to you.

Estimated tax

How it works

The gain is proceeds minus cost basis; the rate applies only to a positive gain, and a loss produces no tax in this estimate.

Example

Selling for $42,000 with a $30,000 basis is a $12,000 gain and $1,800 of tax at 15%.

This tool is for estimation and education, not financial, tax, or legal advice.

Frequently asked questions

Do these tools know my local tax rate?

No. You enter the rate that applies to you, which is why the tools work in any country.

Does the calculator send my numbers anywhere?

No. The calculation runs locally in your browser.

Can I file with these figures?

No. Use them to sanity-check an amount, then rely on your tax authority or accountant for filing.

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