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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 assets bought after 12 May 2026. Assets bought before that date are grandfathered. This tool shows both regimes for your specific numbers.
Educational tool only. Not financial or tax advice. For investment property, use the Property CGT Calculator.
📢 Budget 2026-27: CGT Rules Are Changing
The 50% CGT discount will be replaced by an inflation-adjusted cost base + 30% minimum tax from 1 July 2027. Assets bought before 12 May 2026 are grandfathered. New builds may choose either rule. Full Budget breakdown →
CGT Calculator
Compare your capital gains tax under the old 50% discount and the new Budget 2026-27 inflation-indexed rules.
ASX shares held 12+ months qualify for the 50% CGT discount (pre-budget assets) or inflation-indexation (post-budget).
Budget 2026-27: When did you (or when will you) buy?
In Simple Terms:
Your asset is grandfathered. The legacy 50% CGT discount applies when you sell, regardless of when you sell. Budget changes do not affect you.
Purchase Details
Must be 12+ months for the 50% legacy discount
Sale Details
Your wages/salary before the capital gain. The gain is stacked on top across the correct brackets.
Unapplied losses from prior years reduce your net capital gain before tax is applied.
CGT Regime Comparison
Legacy: 50% CGT DiscountYour Rule
See bracket breakdown
New: Inflation-Indexed (from 1 Jul 2027)
Marginal rate applied (higher than 30% floor)
See bracket breakdown
Under new rules you keep less
New regime adds $3,352 in tax — net profit is $3,352 lower
−$3,352
6.7% of your gain
Your Estimated Net Profit After Tax
$42,000
CGT payable: $8,000|Effective rate: 16.0%
Your grandfathered 50% discount applies. Budget changes do not affect this asset.
Educational purposes only. Tax is calculated by stacking the net taxable gain on top of your existing income across 2024-25 Australian brackets, including 2% Medicare levy. CPI indexation uses ABS 6401.0 data. Actual CGT depends on your full taxable income, other gains/losses, and specific circumstances. Consult a registered tax agent for personalised advice.
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: all assets bought before 12 May 2026 (grandfathered forever).
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: established assets bought after 12 May 2026, from 1 July 2027.
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, the 50% CGT discount is replaced by inflation-adjusted cost base plus 30% minimum tax on real gains for assets bought after Budget night (12 May 2026). Assets bought before that date are grandfathered under the old 50% discount.
Does the 50% CGT discount still apply to assets I already own?
Yes. If you purchased an asset before 12 May 2026 (Federal Budget night), the legacy 50% CGT discount is grandfathered. It applies when you sell, regardless of when the sale occurs.
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 →