Australian Capital Gains Tax Calculator
Australia taxes capital gains as ordinary income, but individuals can claim a 50% CGT discount on assets held for more than 12 months. This calculator works out your net capital gain and the resulting tax added to your income.
Educational estimate. Calculator results are for planning and information only, not financial, tax, medical, legal, or engineering advice. Verify important decisions with official sources or a qualified professional.
Australian Capital Gains Tax Calculator
CGT with 50% Discount & Indexation
📐 Formula & Method
Australian CGT
Capital gains are added to your income and taxed at your marginal rate. The 50% discount halves the taxable gain for assets held over 12 months by Australian residents.
📋 How to Use
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1
Enter purchase and sale prices.
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2
Add associated costs to increase cost base.
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3
Confirm whether asset was held more than 12 months.
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4
Enter other income to determine your marginal rate.
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5
See capital gain, discount applied, and tax payable.
Australian Capital Gains Tax — The 50% Discount Explained
Australia does not have a separate CGT rate. Instead, capital gains are included in your assessable income and taxed at your marginal income tax rate. However, individuals (and some trusts) who hold an asset for more than 12 months before selling are entitled to a 50% CGT discount — meaning only half the gain is included in taxable income.
The cost base includes the purchase price plus incidental costs: stamp duty, legal fees, agent's commissions on purchase. Improvements to the asset also add to the cost base. Capital losses can be offset against capital gains but cannot be used to create or increase an income tax loss.
🔬 Methodology & Accuracy
Formula: Uses the standard mathematical formula shown in the Formula & Method section above. All computations run client-side in your browser — no data is sent to our servers.
Data sources: Tax bands, contribution limits and regulatory rates are taken from official US (IRS, SSA) and UK (HMRC, gov.uk) publications for the current tax year, and updated when bands change.
Last reviewed: July 2024 · Accuracy: Results are precise to two decimal places using IEEE-754 double-precision arithmetic. Intended for educational and planning use only.
For informational purposes only. Results are estimates based on the inputs and formulas provided. For financial, tax, medical, or legal decisions, consult a qualified professional. Rates and regulations change — always verify current figures with official sources.