Estimate your taxable capital gain after purchase costs, selling costs and the updated Australian CGT discount rules (effective 1 July 2025).
Total Cost Base: $0
Capital Gain Before Discount: $0
CGT Discount Applied: $0
Taxable Capital Gain: $0
Estimated CGT Payable: $0
This calculator provides a general estimate only. Capital gains tax can be affected by your tax residency, asset type, ownership structure, prior capital losses, main residence rules, inherited assets and other ATO rules. Always confirm your result with a registered tax agent or accountant.
Capital Gains Tax Calculator Australia
This Capital Gains Tax Calculator helps estimate the taxable capital gain you may need to include in your income tax return after selling an investment property, shares, crypto, business assets or other taxable investments. Capital gains tax is not a separate tax in Australia — instead, your net capital gain is added to your taxable income and taxed at your marginal tax rate.
This calculator reflects the updated CGT discount rules effective from 1 July 2025, including the new 40% discount for assets acquired after that date and the time‑weighted transitional discount for assets held across both periods.
How to Use This Calculator
Enter the sale price, purchase price, purchase costs, selling costs and any capital improvements. Then enter the acquisition date and sale date so the calculator can apply the correct CGT discount:
- Assets acquired before 1 July 2025 receive a time‑weighted blend of the old 50% discount and the new 40% discount.
- Assets acquired on or after 1 July 2025 receive the 40% discount.
- Main residence and pre‑CGT assets remain exempt.
The calculator will then estimate your cost base, capital gain, discount applied, taxable gain and the approximate CGT payable based on your marginal tax rate.
Example
If you purchased an investment property for $500,000, spent $25,000 on purchase costs, $20,000 on improvements and $15,000 on selling costs, your cost base would be $560,000. If you later sold the property for $750,000, the capital gain before any discount would be $190,000.
If the asset was held partly before and partly after 1 July 2025, the CGT discount will be time‑weighted between:
- 50% for the portion of ownership before 1 July 2025
- 40% for the portion after 1 July 2025
The final taxable gain and CGT payable depend on your marginal tax rate and your overall taxable income.
Important Notes
This tool provides a general estimate only. CGT outcomes can vary depending on:
- Main residence rules and partial exemptions
- Inherited property
- Foreign tax residency
- Company, trust or SMSF ownership
- Prior year capital losses
- Small business CGT concessions
- Assets used for both personal and income‑producing purposes
For personalised advice, always consult a registered tax agent or accountant.
Related Tools
These tools work well together because capital gains tax often affects investment planning, property decisions, income tax estimates and long-term financial budgeting.