Investment Calculators
Capital Gains Calculator
Estimate the taxable gain on an asset sale after costs and any allowance, and the tax due at your rate.
Estimated tax due
$2,420
- Gross gain
- $15,100
- Taxable gain
- $12,100
- Net proceeds after tax
- $32,680
How this calculator works
Taxable gain = sale − purchase − costs − allowance; Tax = taxable gain × rate
- allowance
- any tax-free amount available in the year of sale
Example calculation
Illustrative example — not advice
Worked example — the capital gains calculator as it loads, using the default figures below.
- 01Enter purchase price: $20,000.
- 02Enter sale price: $36,000.
- 03Enter buying and selling costs: $900.
- 04Enter annual exempt amount: $3,000.
- 05Enter capital gains tax rate: 20%.
- 06Read the estimated tax due from the results panel: $2,420.
Estimated tax due: $2,420. Gross gain: $15,100. Taxable gain: $12,100. Net proceeds after tax: $32,680.
These figures come straight from the calculator above running on the values listed, so you can retype them and confirm every number yourself. Change any input and the results update immediately. Illustrative only — not a quote, offer or recommendation.
Important considerations
- Rates and allowances vary by jurisdiction, asset type and how long you held it.
- Losses carried forward from other disposals can reduce the taxable gain.
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Terms used here
Frequently asked questions
Do costs really reduce the gain?
Allowable acquisition and disposal costs usually do, but the rules on what qualifies are specific.
Disclaimer
Legamoney calculators are educational tools. Results are estimates based on the figures you enter and do not constitute financial, tax or legal advice.
Last reviewed 2026-08-01