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Annual Capital Gain Calculator

The Annual Capital Gain Calculator estimates net annual capital gain and the tax attributable to that gain using a user-entered tax rate. It combines sale proceeds and selling costs with adjusted basis, then offsets the result with other capital losses entered for the year.

The tool is appropriate for a basic scenario involving one aggregated gain calculation. It does not distinguish short-term and long-term holding periods, apply loss carryforward limits, or calculate special rates. Those details should be reflected in the inputs or reviewed separately.

Capital gain inputs

USD
USD
USD
USD
%
Result
—
Net annual capital gain
Gain before other losses—
Estimated gain tax—
Gain after estimated tax—

1. Enter the primary amount

Provide the main value requested for annual capital gain calculator using one consistent currency.

2. Add supporting inputs

Complete the remaining fields with amounts or rates that apply to the same annual period.

3. Check units and rate format

Enter percentages as ordinary percent values, such as 15 for 15%, not 0.15.

4. Review the calculated result

The result updates automatically and the breakdown shows the major intermediate values.

5. Reset when comparing scenarios

Use Reset to restore the example inputs before testing another case.

Gain before other losses = Sale proceeds − Selling costs − Adjusted basis Net annual capital gain = Gain before other losses − Other capital losses Estimated gain tax = max(0, Net annual capital gain) × Tax rate

What the result means

The result is the gain remaining after sale costs, basis, and entered capital losses.

Results are estimates based on the values you enter and do not replace tax, legal, accounting, or investment advice.

Given: $180,000 proceeds, $8,000 selling costs, $120,000 basis, $10,000 other losses, and a 15% rate.

Calculation: Gross gain = $180,000 − $8,000 − $120,000 = $52,000. Net gain = $52,000 − $10,000 = $42,000. Estimated tax = $42,000 × 0.15 = $6,300.

Result: Net annual capital gain is $42,000.

What is adjusted basis?

It is generally original cost plus eligible additions and minus depreciation or other required reductions.

Can I enter a loss as sale proceeds?

No. Use actual proceeds; the formula will produce a loss when costs and basis exceed proceeds.

Should short-term and long-term gains be combined?

They may be taxed differently, so separate calculations can be more informative.

How are loss carryforwards handled?

Enter only the loss amount expected to be usable in the year.

Does the tax estimate include surtaxes or local tax?

Only if those effects are included in the rate you enter.