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CGT Calculator: Old Rules vs New Rules
See your capital gains tax side-by-side under the old 50% discount and the new Budget 2026-27 inflation-indexed regime.
Works for shares, crypto, gold, and collectibles. No sign-in required.
Budget 2026-27 replaces the 50% CGT discount with an inflation-indexed cost base and a 30% minimum tax on real gains, effective 1 July 2027 for all CGT assets. For assets held before 1 July 2027, the gain is split at the asset's market value at that date: the pre-2027 slice uses the 50% discount, the post-2027 slice uses the new indexed method. This tool shows both treatments side-by-side for your specific numbers.
Educational tool only. Not financial or tax advice. For investment property, use the Property CGT Calculator.
CGT Calculator
Enter what you paid, what you sold for, and when you bought. The calculator determines your CGT regime automatically.
ASX shares held 12+ months qualify for the 50% CGT discount (pre-2027 sale) or inflation-indexation (from 1 July 2027).
Purchase Details
Sale Details
Holding period: 14 years (auto-calculated)
Market Value at 1 July 2027
Advanced settings(inflation: ABS CPI + projection: 2.7%/yr)
Inflation / CPI Assumption
Special Circumstances
Apportioned CGT: split at market value at 1 July 2027
Pre-2027 Slice: 50% Discount
Bracket breakdown
Post-2027 Slice: Indexed + 30% Min
Marginal rate (exceeds 30% floor)
Bracket breakdown
Your Estimated Net Profit After Tax
$42,082
CGT payable: $7,918|Effective rate: 15.8%
For reference: under the legacy 50% discount only: $42,000 net profit (~$8,000 CGT, −$82 difference)
⚖️ Value-based apportionment: gain split at market value at 1 July 2027.
General information only. Not personal financial advice. Tax calculations use 2024-25 Australian income tax brackets including 2% Medicare levy. CPI indexation uses ABS 6401.0 quarterly data (All Groups, weighted average eight capital cities). Value-based apportionment at 1 July 2027 per Treasury Statement 4. Final apportionment formula pending Exposure Draft. Consult a registered tax agent for advice specific to your situation.
How the Calculation Works
Two regimes, one calculator. Enter your purchase price, year, sale price, and tax rate. The tool computes both methods and highlights the difference.
Old method: 50% discount
- Calculate your nominal capital gain (sale price minus cost base)
- Apply the 50% discount if held over 12 months
- Add the discounted gain to your taxable income
- CGT equals discounted gain multiplied by your marginal rate
Applies to: the pre-2027 slice of any asset (cost base → market value at 1 July 2027), and any asset sold before 1 July 2027 in full.
New method: inflation-indexed
- Adjust your cost base upward using ABS CPI data for your holding period
- Calculate the real gain (sale price minus inflation-adjusted cost base)
- Compute CGT at your marginal rate on the real gain
- Apply the 30% minimum tax floor: pay whichever is higher
Applies to: the post-2027 slice of any asset (market value at 1 July 2027 → sale price), and assets bought on or after 1 July 2027 in full.
Need to compare selling vs borrowing instead?
The Sell vs Borrow Calculator adds loan inputs and shows whether the total borrowing cost is lower than your CGT bill.
Frequently Asked Questions
What is changing with the CGT discount in Australia from 2027?
From 1 July 2027, gains accruing after that date are taxed under a new inflation-indexed method, for all CGT assets (shares, ETFs, crypto, property), regardless of when they were purchased. For assets held before 1 July 2027, the gain is split at the asset's market value at that date: the pre-2027 portion retains the 50% discount; the post-2027 portion uses CPI-adjusted cost base plus a 30% minimum tax. The 12 May 2026 Budget night date applies only to negative gearing on established residential property. It has no effect on CGT.
Does the 50% CGT discount still apply to assets I already own?
It depends on when you sell. If you sell before 1 July 2027, the full 50% CGT discount applies. If you sell on or after 1 July 2027, your gain is split at the asset's market value at 1 July 2027: the pre-2027 slice gets the 50% discount, the post-2027 slice uses CPI indexation plus a 30% minimum tax. There is no blanket grandfathering based on when the asset was purchased. The 12 May 2026 date applies only to negative gearing on established residential property.
What is the inflation-indexed CGT method?
Under the new regime, your cost base is adjusted for CPI inflation using ABS data. You only pay tax on the real gain above inflation. A 30% minimum tax rate applies to this real gain. This replaces the flat 50% discount for assets bought after Budget night.
Which assets does this calculator cover?
This calculator covers ASX shares, international shares and ETFs, crypto (major and altcoins), physical gold and silver, collectibles, and other assets. For investment property, use the dedicated Property CGT Calculator.
This calculator is for educational purposes only. Results are illustrative and do not constitute financial, tax, or legal advice. Ripper Wealth is not a licensed financial adviser. Always consult a registered tax agent or financial adviser for advice specific to your situation. CPI data sourced from ABS 6401.0 (quarterly, to 2026 Q1).
Own investment property?
The Property CGT Calculator includes improvements, selling costs, and net profit.
Property CGT Calculator →