CGT Calculator for shares & ETFs
See what the Federal Budget 2026 reforms do to your share or ETF sale. The 50% discount disappears for new purchases, replaced by an inflation indexation method with a 30% minimum tax. Effective 1 July 2027.
Total cost base including brokerage on the way in
Sale price (gross of brokerage on the way out)
Brokerage on sale. Most online brokers charge ~0.1% or a flat $5-15.
2.5% is the RBA target band midpoint
You'd pay $6,800 more tax under the new rules — a 74% increase.
Today's rules
50% discount, until 30 Jun 2027
Tax owed
$9,232
From 1 Jul 2027
Inflation method + 30% floor
Tax owed
$16,032
Your real gain × marginal rate produced a higher tax bill than the 30% floor on the nominal gain.
Want to see how this affects your whole financial picture — your assets, super, retirement plan?
Try the full planDisclaimer: This calculator provides estimates for general information purposes only. Results may not be 100% accurate and should not be relied upon for financial decisions. Tax rules, rates, and thresholds change — always verify with the ATO, official government sources, or a qualified financial adviser, tax professional, or accountant. This is not financial advice.
How CGT works on shares and ETFs
When you sell shares or ETF units in a non-super account, the difference between what you sold for and your cost base(purchase price plus brokerage on the way in) is a capital gain. Hold the asset for at least 12 months and today's rules give you a 50% discount: only half the gain is added to your taxable income.
From 1 July 2027, that discount is replaced. Your cost base is uplifted by inflation across the holding period, and only the “real” gain is taxed at your marginal rate. A 30% floor on the nominal gain applies underneath — the tax bill cannot fall below 30% of the original gain.
What this calculator does not include
- Franking credits attached to dividends paid before sale
- Cost-base layering (different parcels bought at different prices) — we treat your purchase price as a single average
- Off-market buybacks and demerger-related cost-base adjustments
- Your other taxable income for the year (we use a flat marginal rate you pick)
For a full picture of how a share sale flows through your tax, super, and retirement plan, try the JettWorth play mode — no sign-up required.
Grandfathering — does this apply to shares I already own?
No. Shares and ETF units acquired on or before 12 May 2026 (Budget night) keep today's 50% discount permanently. The new rules only apply to units you buy after Budget night, and only to gains realised after 1 July 2027. If you DRP-reinvest dividends, each new parcel of units is treated as acquired on its DRP date — so post-Budget DRP units fall under the new rules.
Important: this is not financial advice
JettWorth is an insights platform, not a licensed financial adviser. Numbers shown here are projections based on the assumptions you enter and the policy as announced — final legislation may differ. Always consult a qualified financial adviser, accountant, or tax professional before acting on what you see here.