CGT Discount Reform Calculator: Sell Before 2027 or Hold?

Should you sell before the 1 July 2027 CGT reform? Compare the 50% discount against cost-base indexation + 30% minimum tax, with net after-tax proceeds side by side.

If you hold and sell later
Enter acquisition date, cost base, current value and income to compare your options.

How the 1 July 2027 CGT reform works

Budget 2026 ends the 50% CGT discount for individuals, trusts and partnerships. From 1 July 2027, the cost base of an asset is indexed for CPI and a 30% minimum tax applies to the real gain. Assets owned across the reform date are split: pre-2027 days keep the 50% discount; post-2027 days use the new rules. See our full explainer on cost-base indexation and the 30% minimum tax.

Frequently asked questions

What changes on 1 July 2027?
For individuals, trusts and partnerships, the 50% CGT discount is replaced by cost-base indexation plus a 30% minimum tax on the real gain. Gains accruing before 1 July 2027 keep the 50% discount; gains after are split-treated.
Is selling before 1 July 2027 always better?
No. Holding lets the asset keep growing, and for slow-growth assets the indexation uplift can shelter most of the reform-period gain. The calculator compares net after-tax proceeds for both timings so you can see which wins for your asset.
Does this apply to my main residence?
No — the main residence exemption is unchanged. Eligible new builds and small business CGT concessions also keep the 50% discount. Tick the exemption box and the calculator shows no reform impact.
Which date controls the CGT event?
For most CGT events the settlement date controls, not the contract date. To lock in the legacy 50% discount, settlement must occur on or before 30 June 2027.

Tax Accuracy & Sources

Reviewed: March 2026 · Tax year: 2025-26

Compares net after-tax proceeds for selling before vs after the 1 July 2027 CGT reform using the 50% discount, cost-base indexation, and 30% minimum tax rules. Does not cover corporate taxpayers, SMSF, or assets subject to the main residence exemption.

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Last updated 24 May 2026 Tax year 2025-26

Data sources: ATO (ato.gov.au), Services Australia

This tool is general information only, not financial advice.

Reviewed by AusTax Tools Editorial Desk

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