How to use this calculator
Enter gross capital gain, deduction amount, capital gain tax rate, and cost basis. The calculator estimates taxable gain, tax, net gain, after-tax ROI, and gain retention.
#654 · Tax Tool
After Deduction Capital Gain Calculator
Calculate net capital gain after deduction and tax, including gain retention and after-tax ROI.
Calculator
After deduction inputs$
$
%
$
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What the result means
The main result is net gain after deduction and tax. Gain retention shows how much of the original gain remains after tax.
Net Gain = (Capital Gain − Deduction) − ((Capital Gain − Deduction) × Tax Rate)
Capital gain tax rules can include holding periods, exemptions, loss offsets, and jurisdiction-specific rates.
Example calculation
With a $20,000 gain, $3,000 deduction, and 15% tax, taxable gain is $17,000 and net gain is $14,450.
Tips for better results
- Enter only realized gain, not sale price.
- Use cost basis to estimate after-tax ROI.
- Include loss offsets as deduction only when appropriate.
FAQ
What does after deduction mean?
After deduction means the original amount has been reduced by eligible deductions before calculating the capital gain result.
Can deductions be larger than the original amount?
For planning, the calculator normally limits taxable or remaining amounts at zero where negative results would not be practical.
Is this calculator tax advice?
No. It is a simplified estimate for planning. Actual rules depend on your tax system, records, and filing situation.
Why use an effective rate?
An effective rate shows the result as a percentage of the original amount, making different scenarios easier to compare.
How should I interpret the result?
Use the main result for a quick estimate and review the supporting stats to understand savings, burden, or remaining exposure.
Related calculators
Capital gain result guide
| Item | Meaning |
|---|---|
| Taxable gain | Capital gain after deduction. |
| Net gain | Taxable gain after tax. |
| Gain retention | Net gain divided by original gain. |
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