Capital Gains Tax Calculator.
Calculate your Australian capital gains tax on shares, property, and crypto. See how the 50% CGT discount and other concessions apply.
Move the sliders or type in the form on the left — the math updates live as you go. Click Get AI verdict when you want a written analysis.
Capital gains tax (CGT) applies when you sell an asset for more than you paid for it. In Australia, capital gains are added to your taxable income and taxed at your marginal rate — but if you've held the asset for 12 months or more, you only pay tax on HALF the gain (the 50% CGT discount). This calculator works out your exact CGT liability, factoring in the discount, capital losses, cost base adjustments, and your marginal rate.
Real-world scenarios
Selling Shares After 12 Months
Rachel bought $20,000 of ANZ shares and sold them 18 months later for $28,000. Her marginal rate is 32.5%.
Capital gain: $8,000. Less brokerage ($40): $7,960. 50% discount (held 12+ months): taxable gain = $3,980. CGT at 32.5% = $1,294. Without the discount, she'd pay $2,587 — the 12-month rule saved her $1,293.
Investment Property with Costs
Mark bought an investment property for $500,000 and sold it after 5 years for $720,000. He spent $30,000 on renovations and $25,000 on selling costs.
Adjusted cost base: $555,000 ($500k + $30k renos + $25k selling). Capital gain: $165,000. 50% discount: $82,500 taxable. At 37% marginal rate: CGT = $30,525. The renovation and selling costs saved Mark $20,350 in CGT.