Realised Gain in 2026: Rules, Tax Implications & Tips for Australians

A realised gain occurs when you sell an asset for more than you paid for it. The difference between the sale price and the original purchase price is your gain — and it becomes "realised" the moment the sale is complete. In contrast, an unrealised gain is simply a paper profit on assets you still hold. Only realised gains are taxable in Australia.

• Sell 100 BHP shares bought at $40 each, now sold at $50: $1,000 realised gain.

• Sell an investment property purchased for $600,000 for $720,000: $120,000 realised gain (before expenses).

• Convert Bitcoin bought at $30,000 to cash at $45,000: $15,000 realised gain.

Why does this matter in 2026? The ATO is rolling out new digital matching systems that capture asset sales — including shares, managed funds, crypto, and property — so under-reporting gains is riskier than ever.

Realised gains are subject to Capital Gains Tax (CGT) in Australia. The rules haven’t changed fundamentally, but there are new wrinkles in 2026:

• Digital asset reporting: The ATO now receives near real-time data from crypto exchanges and share registries, making it harder to overlook (intentionally or not) capital events.

• Revised CGT discount rules: Holding an asset for over 12 months still gives you a 50% discount on the gain, but the ATO is enforcing documentation requirements more strictly.

• Property: Investors flipping properties or subdividing land must report every transaction. The ATO’s property data-matching program now includes off-the-plan and fractional property sales.

For example, if you sold an ETF in March 2026 that you’d held for 18 months, only 50% of your $8,000 gain is added to your taxable income. But if you sold after just nine months, the entire $8,000 is taxed at your marginal rate.

Smart investors don’t just focus on growing their portfolio — they manage when and how they realise gains. Here are some practical strategies for 2026:

• Offset gains with losses: If you’ve realised a gain, consider selling underperforming assets to crystallise a loss, reducing your overall taxable capital gains.

• Time your sales: If you’re close to the 12-month mark, holding an asset a bit longer could halve your tax bill due to the CGT discount.

• Track your records: Keep digital and paper records of every asset purchase and sale — the ATO’s 2026 crackdown means missing documentation can mean missed discounts.

• Consider superannuation contributions: Making personal concessional contributions to super can help offset the extra taxable income from realised gains.

Case in point: Emma, a Sydney-based investor, sold shares in February 2026, realising a $15,000 gain. By selling a poorly performing ETF for a $4,000 loss and making an extra $5,000 super contribution, she reduced her CGT bill and boosted her retirement savings.

Volatility and new asset classes are changing how Australians realise gains:

• Rising property prices: With the median house price in Sydney surpassing $1.5 million in early 2026, more investors are triggering large realised gains when they sell, especially if they’ve owned property for several years.

• Crypto and NFTs: The ATO’s 2026 focus on digital assets means every swap, sale, or conversion is a potential CGT event — even if you swap one token for another.

• Managed funds and ETFs: Large distributions or rebalancing events in 2026 are causing investors to realise gains they didn’t directly initiate.

The bottom line: If you’re selling assets in 2026, you need to know exactly when you’re making a realised gain and what that means for your tax and investment strategy.