Capital Gains Tax Calculator
Estimate your taxable capital gain and potential capital gains tax based on purchase price, sale price, costs, reliefs and tax rate.
Overview
A capital gains tax calculator helps you estimate how much taxable gain may arise when you sell an asset. Enter the purchase price, sale price, allowable buying and selling costs, improvement costs, any exemption, relief and the tax rate that applies to estimate the potential tax due.
How it works
The calculator starts with the difference between the sale price and purchase price to find the gross gain. It then subtracts allowable costs such as acquisition, disposal and qualifying improvement costs. If you enter a relief percentage, that reduces the gain further. Finally, the calculator subtracts the annual exemption and applies your chosen capital gains tax rate to estimate the tax due.
How to use this calculator
- 1Enter the original purchase price of the asset.
- 2Add the sale price you expect or received.
- 3Include eligible purchase, sale and improvement costs.
- 4Enter any annual exemption available to you.
- 5Add any relief percentage that applies.
- 6Review the taxable gain and estimated capital gains tax.
Example Calculation
Purchase price
$100,000
Sale price
$150,000
Purchase costs
$5,000
Sale costs
$3,000
Improvement costs
$10,000
Annual exemption
$3,000
Relief rate
0%
Capital gains tax rate
20%
Taxable gain
$29,000
With a purchase price of $100,000 and a sale price of $150,000, the gross gain is $50,000. After $18,000 of allowable costs and a $3,000 exemption, the taxable gain is about $29,000, leading to an estimated tax of about $5,800 at 20%.
Frequently asked questions
What does this capital gains tax calculator estimate?
It estimates the taxable capital gain and the potential tax due after deducting eligible costs, any relief you enter and an annual exemption.
Which costs can usually reduce a capital gain?
Common allowable costs may include purchase costs, selling costs and qualifying capital improvements. Routine repairs and maintenance are often treated differently.
Does this calculator include country-specific tax rules?
No. It is a general calculator. You enter the exemption, relief and tax rate manually because tax rules vary by country and situation.
Can I use this calculator for property, shares or other assets?
Yes, as a general estimate, as long as you enter suitable prices, costs, reliefs and the correct tax rate for the asset and your circumstances.
What if I made a loss instead of a gain?
If your costs and purchase price exceed the sale price, the taxable gain will usually be shown as zero in this calculator rather than a negative tax amount.
Why should I enter a relief rate separately?
Some tax systems allow reliefs that reduce the gain before tax is applied. Entering the rate separately makes the estimate more flexible.
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Assumptions and warnings
Assumptions
- This calculator provides a general estimate based on the figures and tax rate you enter.
- Eligible costs and capital improvements are assumed to be allowable under your local tax rules.
- The annual exemption and any relief are entered manually and are not looked up automatically.
- The calculation does not account for every country-specific rule, band, loss treatment or reporting requirement.
Warnings
- This calculator provides an estimate only and is not tax advice.
- Tax rules, rates and exemptions vary by country and can change.
- Check current official guidance or speak to a qualified tax professional before filing or making decisions.