Your inputs

Enter the sale details

Purchase price

What you paid per unit, per share, or per coin.

Sale price

What you sold each unit for.

Quantity

Number of units, shares, or coins sold. Fractions allowed.

Capital-gains tax rate

Your applicable effective rate. It depends on your income, holding period, and country — short-term versus long-term in the US, or the 50% inclusion rule in Canada.

Your inputs are calculated locally and are not stored.

Profit after tax$2,550.00

A $3,000.00 capital gain, less $450.00 in estimated tax.

Capital gain: $3,000.00
Tax owed: $450.00
Return: 60.00%

Formula & methodology

How capital gains tax is estimated

The capital gain is the difference between total proceeds and total cost — sale price times quantity, minus purchase price times quantity. Tax owed applies your effective capital-gains rate to a positive gain only; a loss produces no tax here. Net profit is the gain minus the estimated tax. Your rate depends on your income, how long you held the asset, and your country: the US taxes short-term gains as ordinary income and long-term gains at preferential rates, while Canada includes 50% of a gain in taxable income. Enter the effective rate that applies to you.

Capital gain = (Sale − Purchase) × Quantity
Tax owed = max(Capital gain, 0) × (Rate ÷ 100)
Net profit = Capital gain − Tax owed

Purchase: Purchase price per unit
Sale: Sale price per unit
Quantity: Units, shares, or coins sold
Rate: Your effective capital-gains rate

Worked example

100 units bought at $50, sold at $80, taxed at 15%

Suppose you bought 100 units at $50 each and sold them at $80 each, with a 15% capital-gains rate. Total cost is $5,000 and total proceeds are $8,000, for a $3,000 capital gain — a 60% return. Tax owed is 15% of $3,000, which is $450, leaving a net profit after tax of $2,550.

This is an educational estimate based only on the values you enter. It does not determine your actual tax rate, and it is not tax advice.

Assumptions

What this calculator assumes

You enter a single effective capital-gains rate — this tool does not decide short-term versus long-term treatment for you.
Losses (a negative gain) produce no tax here and are not carried forward or offset against other gains.
Purchase and sale prices are per unit, and the same quantity is used for both.
Commissions, fees, and the Canadian 50% inclusion rule are not applied automatically — fold them into your rate or prices if needed.
Money values are rounded to the nearest cent for display.

Common questions

Capital gains FAQ

What rate should I enter?

Enter your effective capital-gains rate. In the US that depends on whether the gain is short-term (taxed as ordinary income) or long-term (0%, 15%, or 20% for most filers). In Canada, only 50% of the gain is taxable, so your effective rate on the full gain is roughly half your marginal rate.

What if I sold at a loss?

If your sale price is below your purchase price, the capital gain is negative and this calculator shows no tax owed. Real tax rules for using losses to offset gains vary by country and are not modeled here.

Primary sources

Sources and review notes

Methodology last checked Jul 14, 2026. Formula implementation is covered by deterministic unit tests. No tax professional review is claimed yet.