The 2026–27 federal budget delivered the biggest shake-up to Australian investor taxation in two decades. From 1 July 2027, the 50% capital gains tax discount that has shaped retirement and wealth-building decisions since 1999 will be replaced with an inflation-based calculation, with a minimum 30% discount on long-term gains. That gives Australian traders roughly fourteen months to plan — and there’s real money on the table for those who act early.
What’s changing — the short version
Under the current rules, an individual investor who holds an asset for at least twelve months and then sells at a profit applies a flat 50% discount to the capital gain. The discounted amount is what gets added to taxable income.
Under the new rules taking effect 1 July 2027, that flat 50% is replaced with an inflation-based discount, calibrated to the CPI movement over the holding period, with a minimum discount of 30% on qualifying long-term gains. In low-inflation years the new discount could be barely above the 30% floor. In higher-inflation periods it would be more generous — but the days of the simple, generous, flat 50% are over.
What doesn’t change
Three important carve-outs from the budget announcement:
- Pre-1 July 2027 unrealised gains are grandfathered. Gains accrued on assets you held before that date continue to get the 50% discount when realised.
- Superannuation rules are separate. The 33.3% CGT discount inside super (in accumulation phase) is unaffected by this change.
- The 12-month holding requirement stays. You still need to hold an asset at least twelve months as an individual investor to qualify for any discount.
The grandfathering is the critical detail. Australian traders who plan well can lock in the more generous treatment for everything they already hold.
The 1 July 2027 valuation snapshot
Because legacy gains and new gains will be treated differently, the ATO will require investors to take a market-value snapshot of every qualifying asset they hold on 1 July 2027. That snapshot establishes the line between the old discount and the new.
For a share or crypto position you’ve held for years, the calculation goes like this. The unrealised gain accrued up to 30 June 2027 is grandfathered — it gets the 50% discount when you eventually sell. The gain accrued after 1 July 2027 gets the new inflation-based discount. A single position can have two CGT layers in it.
What this means in practice: clean records of cost base and acquisition dates will be more valuable than ever. If your historical records are patchy, fix that now while there’s still time.
Who’s worse off under the new rules
Three groups feel this most.
Higher-income earners. The 50% discount was most valuable to traders in the top marginal tax bracket. A 30% discount in low-inflation conditions doesn’t soften the blow nearly as much.
Long-term crypto holders. If you’ve been accumulating BTC or ETH expecting to harvest gains tax-efficiently in a decade, the maths is now different. Future appreciation past 1 July 2027 will be discounted less generously.
Investors near retirement. Those planning to draw down on a portfolio of capital-gains assets in their 60s and 70s have less time to optimise the transition.
A practical action plan for the next 14 months
Step 1 — Audit your unrealised gains
List every asset you hold with an unrealised gain. Note the cost base, current value, and acquisition date. This is the inventory you’re going to be making decisions against.
Step 2 — Identify what’s at risk of weaker treatment
Any asset you expect to appreciate significantly after July 2027 is now in a less tax-efficient bracket for that future appreciation. Crypto and growth shares are obvious candidates. Yield-focused holdings less so.
Step 3 — Decide on selective realisation
Some Australian traders will choose to realise selected gains before July 2027 to lock in the 50% discount, then redeploy capital with full awareness of the new rules. Others will hold and take the two-layer treatment. The right call depends on your view of each asset and your overall tax position.
Don’t realise gains for purely tax reasons unless the underlying investment thesis supports it. A 20% saving on tax is small comfort if you sell the next ten-bagger early.
Step 4 — Fix your record-keeping now
The 1 July 2027 snapshot will require defensible market values for every qualifying asset. If you’ve used multiple exchanges and brokers over the years, consolidate your transaction history now while it’s accessible. Many exchanges only keep data going back a few years.
Step 5 — Talk to a tax agent before the end of 2026
The transition mechanics are not yet fully drafted in the legislation. Get professional advice during late 2026 once the regulations are finalised, well before the changeover takes effect.
What this change doesn’t mean
Despite the headlines, this is not the end of investing in Australia. The capital gains discount is being recalibrated, not eliminated. Long-term holding still gets favourable treatment relative to short-term trading income. Superannuation remains a tax-advantaged structure for those who use it. Investment property rules are separate again.
The honest summary: a generation of Australian investors built wealth around the 50% discount. The next generation will work with something less generous but still meaningful. Plan accordingly.
The bottom line
Fourteen months isn’t long. The traders who handle this change well will be the ones who audit their positions now, get clean on their record-keeping before the snapshot, and use 2026 to make deliberate decisions about realising or holding. The traders who don’t pay attention will discover the new rules at the worst possible time — when they’re trying to sell.
For practical companion reading, see our guides on tax-loss harvesting before 30 June 2026 and reporting crypto trades on ATO myTax. To learn how Impulse Cashholm helps with cleaner transaction records, see our How It Works page or the FAQ.
This article is general in nature and does not constitute tax, legal, or financial advice. Tax legislation is subject to change and the transition regulations for the CGT changes are still being drafted. Speak to a registered tax agent or qualified accountant before acting on any of the strategies discussed.