Capital Gains Tax Calculator 2026
Calculate capital gains tax on property, shares and other assets for the UK and Australia. Updated 2025/26.
🕐 Updated June 2026 · HMRC & ATO verified rates 2025/26
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Frequently Asked Questions
The CGT annual exempt amount for 2025/26 is £3,000 per person. This means the first £3,000 of any capital gain is tax-free each year. Couples can each use their own allowance, effectively sheltering £6,000 of gains between them.
For residential property: 18% for basic rate taxpayers and 24% for higher/additional rate taxpayers. For other assets (shares, investments): 10% for basic rate taxpayers and 20% for higher/additional rate taxpayers.
In Australia, if you hold an asset for more than 12 months before selling, only 50% of the capital gain is included in your assessable income. The discounted gain is then taxed at your marginal income tax rate.
For UK residential property sales, you must report and pay CGT within 60 days of completion through HMRC's UK Property Reporting Service. For other assets, CGT is reported via your annual Self Assessment tax return.
The annual CGT exempt amount for 2025/26 is £3,000 per person. This is the amount of gains you can make tax-free each year. Couples who jointly own an asset can each use their allowance, effectively sheltering £6,000 of gains between them.
Usually not. Your main residence is generally exempt from capital gains tax thanks to Private Residence Relief. CGT typically applies to second homes, buy-to-let properties, inherited property you later sell, and investments such as shares held outside tax-free wrappers like ISAs.
You can deduct the original purchase price, stamp duty paid on purchase, solicitor and estate agent fees on both buying and selling, and the cost of capital improvements such as an extension. Routine repairs and maintenance are not deductible. You also deduct your annual CGT allowance before calculating the tax.
For UK residential property, you must report the gain and pay any CGT due within 60 days of completion, through HMRC's online service. This is separate from your annual Self Assessment return. For other assets, CGT is usually reported through Self Assessment. Missing the 60-day property deadline can result in penalties.