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After Deduction Capital Gain Calculator

The After Deduction Capital Gain Calculator estimates taxable gain and after-tax proceeds after subtracting cost basis, selling costs, allowable loss deductions, and estimated tax. It is intended for straightforward investment or asset-sale scenarios where the user already knows the relevant inputs.

The calculation helps separate economic gain from taxable gain and cash retained after tax. Basis adjustments, wash-sale rules, depreciation recapture, holding-period classifications, and jurisdiction-specific rates are not determined automatically.

Sale and gain inputs

USD
USD
USD
USD
%
Result
—
After-tax capital gain
Economic gain—
Taxable gain after deduction—
Estimated tax—
Net sale cash—

1. Enter sale proceeds

Use the gross amount received from the sale.

2. Enter adjusted cost basis

Include the acquisition cost and any basis adjustments you have determined.

3. Add selling costs

Enter commissions, fees, or eligible transaction costs.

4. Enter an allowable loss deduction

Use only the amount permitted to offset this gain in your scenario.

5. Set an estimated tax rate

Apply a flat rate for planning, then review taxable gain and after-tax gain.

Economic gain = Sale proceeds − Cost basis − Selling costs Taxable gain = max(0, Economic gain − Allowable loss deduction) Estimated tax = Taxable gain × Tax rate ÷ 100 After-tax capital gain = Economic gain − Estimated tax

What the result means

The main result shows the economic gain remaining after estimated tax, while the breakdown shows the reduced taxable gain.

Tax treatment can differ by asset, holding period, basis rules, loss limitations, and jurisdiction.

Given: Sale proceeds = $30,000; basis = $20,000; selling costs = $500; loss deduction = $1,000; tax rate = 15%.

Calculation: Economic gain = $30,000 − $20,000 − $500 = $9,500. Taxable gain = $9,500 − $1,000 = $8,500. Tax = $8,500 × 15% = $1,275. After-tax gain = $9,500 − $1,275 = $8,225.

Result: The estimated after-tax capital gain is $8,225.

Why can after-tax gain exceed taxable gain?

An allowable loss deduction can reduce taxable gain without reducing the economic gain from this specific sale.

What is adjusted cost basis?

It is the asset cost after applicable increases or decreases. Determining basis can require records and rules outside this calculator.

Can this calculate a capital loss?

The breakdown can show a negative economic gain, but taxable gain and tax are floored at zero. Loss deductibility is not calculated.

Should selling costs reduce proceeds or basis?

This model subtracts them directly from proceeds. The economic result is equivalent when the same eligible costs are handled consistently.

Does the entered rate choose long-term or short-term treatment?

No. You supply the planning rate; the calculator does not classify the gain or select a statutory rate.