Capital Gains Tax on Investment Property in Australia: What You Need to Know

Capital gains tax is one of the biggest costs in property investing — and one of the most misunderstood. Get it right and you can legally minimise what you owe. Get it wrong and you’ll hand far more to the ATO than necessary.

This guide covers exactly how CGT works on Australian investment properties, how to calculate it, the 50% discount that most investors are entitled to, what goes into your cost base, and the key strategies for managing your tax liability.

What Is Capital Gains Tax on Property?

Capital gains tax (CGT) in Australia is not a separate tax — it’s part of your income tax. When you sell an investment property for more than you paid for it, the profit (the capital gain) is included in your assessable income for that year, and you pay tax on it at your marginal income tax rate.

CGT does not apply to your principal place of residence (your own home, subject to conditions). It applies to investment properties, holiday homes, commercial properties, vacant land, and your home if you’ve rented it out or used it to produce income.

The ATO taxes capital gains in the year the contract is signed — not the year settlement occurs.

How to Calculate Your Capital Gain

The basic formula is: Capital Gain = Sale Price − Cost Base

But “cost base” is more than just what you paid for the property. It includes a range of costs you may have incurred over the entire ownership period.

What Goes Into Your Cost Base?

Acquisition costs:

• Purchase price
• Stamp duty
• Legal/conveyancing fees
• Building and pest inspection fees
• Loan establishment fees (if not previously deducted)

Ownership costs (if not previously claimed as deductions):

• Capital improvements (e.g. extensions, renovations — NOT repairs)
• Costs of title searches, valuations, or surveys
• Certain legal costs related to ownership

Sale costs:

• Agent commission
• Legal/conveyancing fees
• Marketing and advertising costs
• Auctioneer fees

Add all of these together and you have your cost base. The higher your cost base, the lower your capital gain, and the less CGT you pay.

The 50% CGT Discount: The Single Biggest Tax Break in Property

This is the most important thing to understand about CGT on investment property.

If you hold the property for at least 12 months before selling, you’re entitled to a 50% discount on your capital gain.

In the example above:

• Capital gain: $212,400
• After 50% discount: $106,200

This $106,200 gets added to your taxable income for the year. If you’re on a 37% marginal rate, your CGT bill is approximately $39,300 — not $78,500+ (which it would be without the discount).

The 50% discount applies to individual investors and SMSFs (33% discount, not 50%). It does NOT apply to companies or properties held for less than 12 months.

This is why holding an investment property for at least 12 months before selling is almost always the right move — selling even a day early costs you the entire 50% discount.

Important 2026 update: The 50% CGT discount is being replaced for properties purchased after 12 May 2026, effective from 1 July 2027. New builds remain eligible for the 50% discount. See our guide to Negative Gearing Changes 2026 for full details.

CGT Rates: What You Actually Pay

CGT is taxed at your marginal income tax rate — the same rate as the last dollar of your ordinary income.

For the 2024–25 financial year:

Your capital gain (after the 50% discount) is added on top of your ordinary income for the year. This means if you earned $100,000 from your job and had a $150,000 discounted capital gain, your total taxable income for that year would be $250,000 — pushing all the gain into the 45% bracket.

Timing the sale carefully can significantly reduce your CGT bill — for example, selling in a year when your income is lower (after retirement, between jobs, during parental leave) can reduce the rate at which the gain is taxed.

CGT and the Main Residence Exemption

Your principal place of residence (PPOR) is entirely exempt from CGT, provided:

• You have lived in it the entire time you owned it
• You have not used it to produce income (rented it out or run a business from it)
• It’s not on more than 2 hectares of land

The 6-Year Absence Rule

If you move out of your home and rent it out, you can continue to treat it as your PPOR for CGT purposes for up to 6 years — meaning you may be completely exempt from CGT if you sell within that window.

Conditions:

• You must have actually lived in the property as your main residence first
• You cannot be claiming the main residence exemption on another property at the same time
• The 6-year clock resets if you move back in

This is an extremely valuable rule. Many investors buy, live in a property for a while, then move out and rent it — and sell within 6 years CGT-free.

Partial Main Residence Exemption

If you rented out the property for part of the time you owned it, you’re entitled to a partial exemption. The gain is apportioned on a time basis.

Example: You owned the property for 10 years. You lived in it for 3 years, then rented it for 7 years. Total capital gain: $300,000 (after 50% discount: $150,000). Taxable portion: 7/10 = 70%. Taxable gain: $105,000.

When Is CGT Not Payable?

You don’t pay CGT when:

• You sell your primary residence (and it meets the full exemption criteria)
• You make a capital loss — there’s no tax, but you must record the loss
• You sell an asset that wasn’t acquired after 19 September 1985 (pre-CGT assets)

Capital Losses

If you sell a property for less than your cost base, you make a capital loss. Capital losses:

• Cannot be deducted against ordinary income (unlike property operating losses)
• Can be carried forward indefinitely and offset against future capital gains

This means a capital loss this year reduces your CGT bill when you next sell a property at a gain.

CGT in a Self-Managed Super Fund (SMSF)

SMSFs pay a reduced CGT rate on investment property:

• Properties held less than 12 months: 15% flat (no discount)
• Properties held more than 12 months: 10% effective rate (15% × 33% discount)
• Properties held into retirement phase: 0% CGT — completely exempt

This makes SMSFs extremely attractive for property investment at the right stage of life, particularly for higher-income earners who face 45% personal CGT rates.

Strategies to Legally Minimise CGT on Investment Property

1. Hold for at Least 12 Months

Always. Non-negotiable. The 50% discount is worth tens of thousands of dollars on most investment properties.

2. Time the Sale Carefully

Sell in a year when your income is lower — retirement year, sabbatical, parental leave, or a year of lower business income. The discounted gain is taxed at your marginal rate, so a lower income year means a lower rate.

3. Maximise Your Cost Base

Keep meticulous records of every capital expenditure over the hold period — renovations, improvements, legal costs. Every dollar added to the cost base directly reduces your capital gain.

4. Use Capital Losses

If you have other investments with capital losses (shares, another property), consider timing their sale to coincide with selling your property, to offset the gain.

5. Sell in Installments

On commercial properties or where possible, structured settlements spread across tax years can split the gain across two financial years, preventing it all being taxed at the top rate.

6. Consider the SMSF Structure for Future Purchases

If you’re building a portfolio and haven’t started yet, purchasing future properties inside an SMSF can dramatically reduce your eventual CGT exposure — especially for properties you’ll hold into retirement.

Common CGT Mistakes to Avoid

Forgetting to include all cost base items. Stamp duty is by far the most commonly missed — it’s typically $15,000–$40,000 and directly reduces your capital gain.

Not keeping renovation records. Capital improvements must be substantiated. If you spent $30,000 on a kitchen renovation and can’t prove it with receipts, the ATO won’t allow it.

Selling within 12 months by accident. If you bought an investment property and circumstances force a quick sale, be very aware of the CGT discount cutoff at exactly 12 months.

Not accounting for depreciation clawback. If you claimed Division 40 plant and equipment depreciation, the ATO reduces your cost base by those claims when you sell. This is called the “cost base adjustment” and can increase your capital gain.

Frequently Asked Questions

The Bottom Line

CGT is a significant cost for property investors, but it’s also one of the most controllable. The 50% discount for long-term holders is enormously valuable. A careful approach to cost base documentation, hold periods, and sale timing can make a meaningful difference — often tens of thousands of dollars.

The key habits: keep every receipt for capital works, plan your sale timing strategically, and always hold for at least 12 months.

If you’re building a long-term portfolio, also read: How to Build a Property Portfolio from Scratch in Australia and Land Tax in Australia: What Every Property Investor Needs to Know

CGT planning becomes critical when you’re actively building a property portfolio in Australia — the timing of your sales can make a substantial difference to your net return.

If your investment property is held inside a self-managed super fund, the CGT rules work differently — especially when transitioning to pension phase. Our guide to SMSF property investment in Australia covers the full tax treatment including how capital gains are taxed in accumulation vs pension phase.

This article is for general informational purposes only and does not constitute financial or tax advice. Speak with a registered tax agent or financial adviser for advice specific to your situation.

General Advice Warning: This article is general in nature and does not constitute personal financial advice. Please consult a licensed financial adviser before making investment decisions.