A couple on the Central Coast sold an investment unit they had held for eight years. They banked a tidy profit and figured the money was theirs to spend. Then tax time rolled around, and a chunk of that profit turned out to be owed to the ATO as capital gains tax. Nobody had explained it to them upfront, and that is exactly why so many people get caught out.
Here is the short version. Capital gains tax applies when you sell an asset, such as an investment property or shares, for more than you paid for it. The gain gets added to your taxable income for that year. Either way, it is not a separate flat tax, and it is not charged on assets you still hold.
Selling an asset without checking the tax impact first is a common and costly mistake. Getting a tax agent to run the numbers before you sell can save a nasty surprise later. This matters most for anything bought years ago, where the original numbers get harder to track down.
What is capital gains tax
Capital gains tax, often shortened to CGT, is not really a separate tax at all. It is simply the way a profit from selling certain assets gets folded into your regular income tax. If you sell an asset for more than it cost you, the profit is a capital gain. That gain is added to your assessable income for the year you sold it.
When capital gains tax actually applies
In practice, CGT applies to assets such as investment properties, shares, and managed funds. It generally does not apply to your own home, personal car, or everyday personal belongings. Selling at a loss instead of a profit creates a capital loss, which can offset gains elsewhere, rather than creating a tax bill.
How capital gains tax is calculated
The basic calculation starts with your sale price, minus your cost base. Your cost base includes what you originally paid, plus certain costs like stamp duty, legal fees, and some renovation costs. From there, what is left over is your capital gain, which then gets added to your income for that financial year.
The fifty percent CGT discount
If you held the asset for more than twelve months before selling, individuals and trusts can generally reduce the taxable gain by fifty percent. That said, this discount does not apply to assets held for less than a year, or to companies. Because of this, timing a sale just past the twelve month mark can make a real difference to the final bill.
Does your family home attract capital gains tax
Usually not. Your main residence is generally exempt from capital gains tax. This applies as long as it has been your home for the whole time you owned it. It also needs to have never been used to produce income, such as being rented out. Once a property stops being your main residence, or starts earning rent, the exemption can become partial rather than complete.
What if you rent out part of your home
Renting out a room, or running a business from part of your home, can affect the exemption. Broadly, the portion of the home used to earn income may no longer be fully covered. Instead, the ATO looks at factors such as floor space and time period when working this out, so it is worth getting advice before assuming the whole property stays exempt.
Ways people legally reduce their CGT bill
A few common, legitimate approaches come up again and again. Holding an asset past the twelve month mark unlocks the discount mentioned earlier. Selling in a year when your income is lower can reduce the overall tax rate applied to the gain. Offsetting a gain with a capital loss from another asset is also common practice, since losses can be carried forward if they are not used straight away.
A tradie out near Byron Bay sold some shares at a loss the same year he sold an investment property at a solid profit. His agent used the share loss to offset part of the property gain, which meaningfully reduced what he owed that year. None of this required anything clever, just good timing and proper record keeping.
How losses can offset gains
A capital loss happens when you sell an asset for less than its cost base. In fact, rather than disappearing, that loss can be used to reduce a capital gain from a different asset in the same year. If you have more losses than gains in a given year, the leftover loss carries forward to future years. Because of this, it often pays to think about your whole portfolio at tax time, rather than looking at each sale in isolation.
CGT on shares versus property
The underlying rules are the same for both, but the practical experience differs a fair bit. Share sales are usually simple to track, since your broker or trading platform keeps a clear record of purchase price and sale price. Property is messier. On top of that, renovation costs, agent fees, stamp duty, and years of paperwork all feed into the cost base. It is easy to lose track of receipts over a decade or more of ownership.
As a result, property sales are where people most often underpay or overpay CGT simply through poor record keeping. Keeping a running file of every cost related to a property, updated as you go rather than reconstructed at sale time, makes the eventual calculation far less stressful.
What this guide does not cover
Capital gains tax gets more complicated in a few specific situations. Inherited or deceased estate property follows its own set of rules. The six year rule for a former home you have rented out is its own topic entirely. Small business CGT concessions, foreign resident rules, and crypto assets each come with extra layers worth covering properly elsewhere. If any of these apply to you, treat this guide as the starting point rather than the full picture.
For anything beyond a simple, one off sale, working through your specific numbers with a tax agent is worth far more than guessing. When you are ready to sort out a sale, past or upcoming, get in touch and we will walk you through what you actually owe. You can also read more detail directly on the ATO website if you want to check a specific scenario.
Frequently asked questions
Do I pay capital gains tax on my family home
Usually not, as long as it has been your main residence the entire time you owned it and was never used to produce income. Renting it out or using part of it for business can change this.
What is the CGT discount
Individuals and trusts can generally reduce a taxable capital gain by fifty percent if they held the asset for more than twelve months before selling. Otherwise, companies do not get this discount at all.
Do I pay CGT on shares I have not sold
No. Capital gains tax only applies once you actually sell or dispose of an asset. Holding onto shares that have gone up in value does not trigger any tax until you sell.
What counts as the cost base
Your cost base generally includes the original purchase price plus certain related costs, such as stamp duty, legal fees, and some improvement costs. It reduces the taxable gain when you eventually sell.
Can I reduce my capital gains tax bill legally
Yes. Common approaches include holding assets past twelve months for the discount, offsetting gains with capital losses, and timing a sale for a lower income year. A tax agent can help work out which options actually apply to your situation.
Do I need a valuation for CGT purposes
Sometimes. For instance, if you inherited an asset, changed its use, or cannot easily prove your original cost, a professional valuation can help establish the cost base. Otherwise, your actual purchase records are usually enough.
What records do I need to keep for CGT
Keep purchase and sale contracts, receipts for improvements, and records of related costs such as stamp duty and agent fees. Since CGT can apply years after a purchase, it pays to store these records for as long as you hold the asset, plus a few years after selling.
Does CGT apply to a car or personal belongings
Generally not. Cars and most personal use items are specifically excluded from capital gains tax, so selling your car for a profit does not usually create a tax event. Otherwise, the main things to watch are investments and assets bought to make money, rather than everyday possessions. So the family car and the old furniture in the garage are safe from this particular tax.
Do I need to report a capital gain even if I made a loss
Yes. Both capital gains and capital losses generally need to be reported on your tax return for the year the asset was sold. Even so, a loss reduces your overall tax rather than adding to it, so reporting it works in your favour. Either way, leaving it off your return is not an option worth risking.