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Capital Gains Tax Calculator

Estimate capital gains tax on the sale of shares, property, or other assets for US, UK, Australia, and custom tax rates.

Country

Purchase price ($)

Sale price ($)

Selling expenses ($) optional

Holding period

Other annual income ($)

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Everyday Uses

Before you sell

Estimate the tax on selling shares or property so the "profit" you expect is the real one.

Timing decisions

Long-term rates often beat short-term — see what waiting a few months could save.

Home sale planning

Check how exemptions and basis adjustments change the taxable gain on a property.

Portfolio rebalancing

Weigh the tax cost of selling winners against the benefit of rebalancing.

Offsetting losses against gains

Losses realised in the same period usually reduce taxable gains, so the timing of selling a poor investment alongside a good one can change the bill considerably.

Gifts and inheritance

Transferring an asset can trigger a gain even when no money changes hands, while inherited assets often have their base cost reset to the value at the date of death.

Frequently Asked Questions

What is Capital Gains Tax (CGT) and what triggers it?

CGT is a tax on the profit (gain) made when you sell or dispose of an asset that has increased in value. Taxable events include: selling shares or investments, selling a property that isn't your main home, selling a business, gifts of assets (in most jurisdictions), and cryptocurrency transactions. The gain = proceeds minus allowable costs (purchase price + acquisition costs + improvement costs).

What are the US capital gains tax rates for 2024?

Short-term gains (assets held ≤ 12 months) are taxed at ordinary income rates (10–37%). Long-term gains (held > 12 months) are taxed at 0% (income up to $47,025 single), 15% ($47,026–$518,900), or 20% (above $518,900) for 2024. The 3.8% Net Investment Income Tax also applies above $200,000/$250,000 income.

What is the UK CGT annual exempt amount for 2024/25?

The UK Annual Exempt Amount is £3,000 for 2024/25 — sharply reduced from £12,300 in 2022/23. Gains below this are tax-free. Above it: 10% basic rate (18% for property) and 20% higher/additional rate (24% for property). From October 2024, the residential property CGT rate increased from 18%/28% to 18%/24%.

How does the Australian 50% CGT discount work?

Australian individuals and trusts who hold an asset for more than 12 months can reduce their capital gain by 50% before adding it to taxable income. A $100,000 gain on shares held 18 months = $50,000 taxable. At a 37% marginal rate, CGT = $18,500 (effective rate 18.5%). Companies do not get the 50% discount.

What is tax-loss harvesting?

Tax-loss harvesting is selling investments at a loss to offset capital gains and reduce CGT. In the US, net capital losses offset gains dollar-for-dollar; excess losses can offset up to $3,000 of ordinary income, with the rest carried forward. Watch out for the wash-sale rule — buying back the same security within 30 days disallows the loss.