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Crypto Tax Estimator Calculator

Find the taxable gain on a crypto trade and what is left after tax.

How it is calculated

The tool applies one flat rate to one trade: gain = proceeds − cost basis − fees and tax = max(0, gain) × rate ÷ 100. Proceeds, cost basis and fees are money amounts in the same currency; the rate is a percentage between 0 and 100. Net profit is the gain minus the tax. If the gain is negative, the estimated tax is shown as zero and the loss is displayed as a negative gain; the tool does not carry losses forward or offset them against other trades. Negative amounts, or a rate above 100, return no result. Which rate is correct (short-term, long-term, a flat crypto rate) depends on your country and how long you held the coins, so enter the rate that applies to you.

Worked example

You sell coins for 12,000 that cost 8,000 to buy, and pay 150 in fees, at a 15% rate. Gain = 12,000 − 8,000 − 150 = 3,850. Tax = 3,850 × 15 ÷ 100 = $577.50. Net profit after tax = 3,850 − 577.50 = $3,272.50. The result card shows an estimated tax of $577.50, a capital gain of $3,850.00 and a net profit of $3,272.50.

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Common mistakes

  • Leaving purchase fees out of the cost basis, or entering sale fees as zero, which overstates the gain.
  • Entering the amount received after fees as proceeds and then also entering the fees, so they are deducted twice.
  • Using one average cost for coins bought in several lots at different prices when the lots sold are specific ones.
  • Typing 0.15 instead of 15 in the rate field: the rate is a percentage, so 0.15 means 0.15%.
  • Expecting a loss to reduce the tax shown here; a negative gain just produces zero tax for this single trade.

Sources

About this calculator

Selling, swapping or spending cryptocurrency generally triggers a capital-gains tax event: taxable gain = proceeds − cost basis − transaction fees, where cost basis is what you originally paid for the coins (including any fees at purchase) and proceeds is what you received on the sale. Whether that gain is taxed at short-term (ordinary income) or long-term (typically lower) capital gains rates in the US usually depends on whether you held the asset for more or less than a year.

Crypto traders and their accountants use this kind of estimate throughout the year — not just at tax time — for tax-loss harvesting decisions (selling a losing position to offset gains elsewhere) and to avoid an unpleasant surprise when a big trade turns out to owe more tax than expected. It's especially useful for anyone who's made several trades in a coin bought at different times and prices, since cost basis has to be tracked per-lot rather than as one average number.

Subtract the cost basis and fees from your proceeds to get the taxable gain, apply your tax rate, and you see the estimated tax and what you keep.

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