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Withholding Capital Gain Calculator

The Withholding Capital Gain Calculator estimates tax withholding on a capital gain by separating sale proceeds, cost basis, selling costs, and a user-entered withholding rate. It helps model the cash retained from a transaction when withholding is based on the calculated gain.

Some jurisdictions withhold on gross proceeds rather than gain, while others do not require withholding at all or apply special nonresident rules. Confirm the correct withholding base before relying on the result.

Calculation inputs

$
$
$
%
Result
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Estimated withholding on capital gain
Calculated gain—
Estimated withholding—
Net proceeds after costs and withholding—

1. Enter the starting amount
Use the gross, original, or tax-exclusive amount requested by the first field.

2. Add reductions or adjustments
Enter deductions, basis, credits, fees, or other adjustments shown for this calculator.

3. Set the applicable rate
Use the rate that applies to your jurisdiction and payment type; do not assume the default is legally correct.

4. Review the result
Check the main result and the breakdown to confirm the calculation base and intermediate amounts.

5. Test another scenario
Change any input to update the result automatically, or use Reset to restore the defaults.

Capital gain = Sale proceeds − Cost basis − Selling costs; Withholding = max(Capital gain, 0) × Rate ÷ 100

What the result means

The result estimates withholding only on a positive gain under the selected model.

This does not determine long-term versus short-term treatment, loss limitations, or whether withholding is based on proceeds.

Given:
Proceeds = $75,000
Basis = $50,000
Selling costs = $2,500
Rate = 15%

Calculation:
Gain = $75,000 − $50,000 − $2,500 = $22,500
Withholding = $22,500 × 15% = $3,375

Result:
Estimated withholding is $3,375.

What does this capital-gain withholding represent?

It is the entered rate applied to a positive gain after basis and selling costs.

Which rate should I enter?

Use the rate that applies to the payment, income type, and jurisdiction you are analyzing. Rates can differ by taxpayer status, treaty, filing rules, and date.

Can I leave an optional adjustment at zero?

Yes. A zero value means that adjustment is not included in the calculation.

Why might the final filed amount differ?

Authorities may distinguish short- and long-term gains, apply exemptions, or withhold on gross proceeds instead of gain.

Is this a substitute for a tax return or professional advice?

No. It is a planning calculator based on the values you enter, not a filing determination or individualized tax advice.