Capital Gains Tax Calculator
Estimate Australian capital gains tax on an asset sale, factoring in cost base, capital losses, the 50% CGT discount for eligible holdings and tax payable.
Your results
Calculation breakdown
- Cost base
- $500,000.00 + $20,000.00 + $0.00 + $0.00 = $520,000.00
- Raw gain
- $700,000.00 − $520,000.00 = $180,000.00
- Assessable gain
- $180,000.00 − discount $90,000.00 = $90,000.00
Assumptions
- Australian-resident individuals and trusts receive a 50% CGT discount on assets held 12 months or more.
- CGT discount rules: 2026–27 · Source: Australian Taxation Office · Last verified 2026-07-01
- This is a simplified estimate and does not model the main residence exemption, small business concessions or other CGT rollovers.
How this calculator works
Capital gains tax isn't a separate tax in Australia — a net capital gain is added to your assessable income and taxed at your marginal rate in the year the asset is sold. This calculator works out your cost base from the purchase price plus acquisition costs, improvements and selling costs, subtracts that from the sale price to find the raw gain, applies any prior capital losses, and then checks whether the 50% CGT discount for individuals and trusts (or the one-third discount for complying super funds) applies based on the entity type, Australian residency and a minimum 12-month holding period. Companies never receive the discount. The estimated tax figure applies a flat marginal rate you enter to the assessable gain after any discount, which is a simplification — your real tax outcome depends on your full income for the year and which tax bracket the gain pushes you into.
Rates sourced from the Australian Taxation Office for the 2026–27 financial year. Last reviewed 01/07/2026.
Frequently asked questions
Do I need to hold an asset for exactly 12 months to get the discount?
You need to hold the asset for at least 12 months, excluding the day of purchase and including the day of sale, before the CGT event. Selling even a day early can mean missing out on the discount entirely.
Does my home get charged capital gains tax?
Your main residence is generally exempt from CGT under the main residence exemption, though the exemption can be partial if the property was rented out for part of the ownership period or used to run a business.
Can capital losses reduce my capital gain?
Yes. Capital losses from other investments can be offset against capital gains in the same year, and unused losses can generally be carried forward to offset gains in future years, though they can't offset ordinary income.
Rates and thresholds are configured for the 2026–27 Australian financial year and should be reviewed when government settings change.
Results are estimates only and are not financial, tax, legal or credit advice.