Selling a property or cashing in some shares for more than you paid always feels like a win. That feeling doesn't last long once tax time reminds you the ATO wants a slice of that profit too. That's capital gains tax. The concept is simple enough, but the actual rules trip a lot of people up, especially now that they're changing.

What Actually Counts as a Capital Gain

A capital gain is the profit you make when you sell or dispose of an asset for more than its cost base. The cost base is more than just the purchase price. It includes stamp duty, legal fees, and any capital improvements you made along the way. Keep those receipts, even years later.

It's not just a straight sale that triggers this either. You can trigger a capital gains event by selling shares, managed fund units, or crypto. Selling an investment property counts too. So does transferring an asset to someone else, gifting included. Losing a business asset to something like a fire or a compulsory acquisition can also trigger it.

Whatever the trigger, the gain or loss generally needs to go in your tax return for that year. Capital gains aren't taxed separately in Australia. They get added straight to your regular taxable income.

How the Gain Gets Worked Out

The maths is simple. Sale price minus cost base gives you the gain or loss. If you've held the asset longer than 12 months as an Australian tax resident, you can currently apply a 50% discount before it gets added to your income. That's a big part of why so many investors make a habit of holding long-term. That discount is one of the things about to change; more on that shortly.

If you end up with a loss instead, you can't use it to bring down your regular income. What you can do is carry it forward. You can set it against gains in later years, which is handy if one of your investments has had a rough run.

Tax Implications and Exemptions

Capital gains sit inside your regular tax return rather than getting taxed on their own. A large gain in one year can genuinely push you into a higher bracket. That's worth planning around, not discovering after the sale has already gone through.

Not everything you sell gets caught by CGT, though. The biggest exemption for most people is the main residence exemption. The ATO's main residence rules set out the conditions. You need to be an Australian resident. The property needs to have been your home for the whole time you owned it. It can't have been used to earn income. And it needs to sit on two hectares of land or less. Miss one of those and you might still get a partial exemption rather than none at all.

A few other exemptions are worth flagging too. These include assets bought before 20 September 1985, personal items sold for small amounts, and certain small business concessions.

If shares are more your thing than property, it's worth having a proper look at how you're calculating gains and applying discounts. This is one area where people genuinely leave money on the table. We've covered it in more detail in this share investment tax guide.

The Change Everyone Should Know About

Here's the part that matters most if you're thinking about selling anything in the next couple of years. As part of the 2026-27 Federal Budget, the government pushed through reforms to negative gearing and CGT. These are now in law. The ATO's reform page spells it out. The 50% discount for individuals, trusts, and partnerships is being replaced with cost base indexation. A new minimum 30% tax rate on capital gains is coming in alongside it.

There's some good news buried in there. If you already own the asset, properties held at the time of the announcement are exempt from the negative gearing side of things. The new CGT rules only bite on gains made after 1 July 2027. Growth up to that date should still be assessed under the old rules. Only what accrues after that date gets caught by the new indexed method and the 30% minimum.

For property investors, this is a genuine shift away from the buy-and-hold forever approach. That approach has worked well for a couple of decades now. If you've been sitting on the fence about selling, factor this into your decision early. Do it well before settlement day rolls around, not after.

Strategies to Manage and Reduce Your CGT

You can't avoid capital gains tax entirely if you're building wealth through property or shares. There's still plenty you can do to manage it sensibly.

Holding an asset past the 12-month mark keeps you eligible for the current discount while it's still around. It's rarely worth selling early just for convenience. If something else in your portfolio is sitting at a loss, selling it in the same financial year as a gain can take the edge off what you owe. Timing your sales matters too, particularly around the 1 July 2027 cutoff. Plan rather than scrambling once a buyer's already made an offer.

Good records make a real difference as well. Every dollar spent on stamp duty, legal fees, renovations, or agent fees chips away at your taxable gain. That only works if you can back it up with paperwork. Making a super contribution in a year you've had a large gain can also help soften the extra taxable income. It's also worth checking how your assets are structured every so often, whether that's individually, through a trust, or through a company. This can genuinely change your CGT outcome depending on the asset and how it's sold.

Given how much is shifting with these rules, advice from someone who does this for a living pays for itself. Get in touch with our team if you'd like a hand working through what it means for you.

Conclusion

Capital gains tax isn't going anywhere, and the rules around it are shifting more than they have in decades. Know your cost base, know your exemptions, and keep 1 July 2027 on your radar. The earlier you plan for CGT, the better the outcome tends to be.

If your situation feels complicated, or the new rules have you second-guessing a sale, get advice before you act. It's a lot cheaper than getting it wrong.

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