You've bought a property in Sydney or another Australian city. Now you're facing a choice: hold it for long-term capital growth, rent it out for ongoing income, or do both. The problem is that capital gains and rental income are taxed in completely different ways. Get the tax treatment wrong, and you could lose thousands in unnecessary tax or miss out on deductions you're entitled to claim. This guide walks you through the exact tax differences, what you can deduct, and how to structure your property investment for your situation.

Understanding Capital Gains Tax vs Rental Income Tax

Capital gains tax (CGT) applies when you sell an asset for more than you paid for it. Rental income is the money you receive from tenants each week or month. These are taxed as two separate streams, and the Australian Taxation Office (ATO) treats them very differently.

When you sell a property for a profit, you pay CGT on the gain. The gain is the difference between what you paid (your cost base) and what you sold it for, minus any costs of sale like agent fees and legal fees. If you've owned the property for at least 12 months, you get the capital gains tax discount: individuals pay tax on only 50% of the gain. This means if you make a $100,000 profit, you only include $50,000 in your taxable income.

Rental income, by contrast, is added to your total taxable income and taxed at your marginal tax rate. If you earn $80,000 per year and receive $20,000 in rental income, you pay tax on $100,000. There's no discount. However, you can deduct all expenses directly related to earning that rental income.

The key difference: capital gains get a 50% discount if held for 12 months or more. Rental income does not. But rental income comes with deductions that capital gains do not.

What You Can Deduct from Rental Income

This is where rental income becomes attractive. Almost every expense you incur to earn rental income can be deducted, which reduces your taxable income dollar for dollar.

Common deductions include:

  • Mortgage interest (but not the principal repayment)
  • Council rates and water charges
  • Strata fees (for apartments and townhouses)
  • Landlord insurance
  • Repairs and maintenance (fixing a broken window, repainting, fixing plumbing)
  • Property management fees (if you use an agent)
  • Advertising costs to find tenants
  • Legal and accounting fees related to the rental
  • Depreciation on fixtures and fittings (carpets, appliances, light fittings)

Depreciation is particularly valuable. The ATO allows you to claim depreciation on plant and equipment inside the property (not the building structure itself). A professional quantity surveyor can assess your property and provide a depreciation schedule. For a $500,000 apartment in Sydney with $150,000 worth of depreciable items, you might claim $4,000 to $6,000 per year in depreciation deductions, even though you haven't spent that money.

Important: you cannot deduct capital improvements. If you renovate the kitchen or add a bathroom, that's a capital expense and goes into your cost base for CGT purposes, not a deduction against rental income. The ATO distinguishes between repairs (deductible) and improvements (not deductible). A repair restores something to its original condition. An improvement makes it better than it was.

Capital Gains Tax: The 12-Month Rule and the Discount

The capital gains tax discount is one of the most powerful tax breaks available to property investors in Australia. But it only applies if you've owned the asset for at least 12 months.

Here's how it works. Say you buy a property for $600,000 and sell it for $750,000 after holding it for 18 months. Your capital gain is $150,000. Because you've held it for more than 12 months, you apply the 50% discount. You only include $75,000 in your taxable income. If you're in the 45% tax bracket (plus Medicare levy), you pay tax on $75,000, not $150,000. That's a saving of around $33,750.

If you'd sold the same property after only 11 months, you'd pay tax on the full $150,000 gain. No discount applies.

The 12-month holding period is measured from the date you acquired the asset to the date you entered into a contract to sell it (not the settlement date). If you buy on 1 June 2025 and sign a contract to sell on 2 June 2026, you've met the 12-month test.

There's no upper limit on the gain. Whether you make $50,000 or $500,000, the 50% discount applies to the entire gain if you've held it for 12 months.

Combining Both: Rent Now, Sell Later

Many investors rent out a property for several years, claim deductions against rental income, and then sell it for a capital gain. This strategy combines the best of both worlds: you reduce your taxable income each year through deductions, and then you get the CGT discount when you eventually sell.

Let's walk through a real example. You buy a property in Parramatta for $500,000 in July 2025. You rent it out immediately.

Year 1 (2025-26): You collect $25,000 in rent. Your deductible expenses are $18,000 (mortgage interest, rates, insurance, repairs, depreciation). Your net rental income is $7,000, which you add to your other income and pay tax on at your marginal rate.

Year 2 (2026-27): Same pattern. $25,000 rent, $18,000 deductions, $7,000 net income.

Year 3 (2027-28): Same again.

Over three years, you've paid tax on $21,000 in net rental income. But the property has appreciated to $580,000. You sell in August 2028 (more than 12 months after purchase). Your capital gain is $80,000. You apply the 50% discount and include only $40,000 in your taxable income for that year.

Total tax paid: tax on $21,000 (over three years) plus tax on $40,000 (in year of sale). Compare this to if you'd just held the property without renting it out: you'd have paid tax on $40,000 (the capital gain only, with the discount). The rental income strategy gave you three years of deductions that reduced your tax bill each year.

Key Differences in How the ATO Treats Them

The ATO has different rules and record-keeping requirements for capital gains and rental income.

For rental income, you must keep records of all income and expenses. The ATO expects you to have receipts, invoices, bank statements, and a rental income and expense schedule. You report this on your tax return each year. If you're making a loss (expenses exceed income), you can carry that loss forward to offset future rental income.

For capital gains, you need to keep records of your purchase price, the date you bought it, the date you sold it, and all costs of acquisition and sale. You report the gain (or loss) on your tax return in the year you sell. You don't report it every year you hold the property.

The ATO also looks at your intention. If you buy a property with the intention of selling it quickly for a profit, it might be treated as ordinary income (not capital gain), which means no 50% discount applies. This is called being "on capital account" versus "on revenue account". Generally, if you hold a property for investment (rental) or personal use, it's on capital account. If you're a property trader buying and selling frequently, it's on revenue account.

Tax Planning: Which Strategy Suits Your Situation

Your choice between focusing on capital gains or rental income depends on your personal circumstances.

Choose rental income if:

  • You need regular cash flow to cover expenses or supplement your income
  • You're in a high tax bracket and can use deductions to reduce your taxable income significantly
  • You expect the property to appreciate slowly but want steady returns
  • You're willing to manage tenants or pay a property manager

Choose capital gains (hold without renting) if:

  • You expect strong capital appreciation in the area
  • You don't need regular income from the property
  • You're in a lower tax bracket, so deductions are less valuable
  • You want to avoid the hassle of being a landlord

Choose both if:

  • You can afford to rent it out and still cover expenses
  • You want to maximise tax deductions while building long-term capital growth
  • You're comfortable managing a rental property or paying a property manager

A tax accountant can model your specific situation and tell you which approach saves the most tax.

Common Mistakes to Avoid

Forgetting to claim the CGT discount. If you've owned a property for 12 months or more and sell it, you must claim the 50% discount on your tax return. Don't assume the ATO will do it for you. You need to explicitly state it in your capital gains schedule.

Claiming capital improvements as repairs. The ATO is strict about this. If you replace a carpet, that's a repair and deductible. If you install new carpet as part of a renovation, that's an improvement and not deductible. Keep records and receipts to prove the nature of the work.

Not keeping depreciation records. Depreciation is one of the most valuable deductions for rental properties, but you need a professional depreciation schedule from a quantity surveyor. Without it, you can't claim it. The cost of a depreciation report (usually $300 to $600) pays for itself in the first year through tax savings.

Mixing personal use with rental use. If you rent out a property but use it yourself for part of the year, you can only claim deductions for the period it was rented. The ATO will apportion your deductions based on the number of days it was rented versus personal use.

Useful Official Sources

For detailed information on capital gains tax, rental income deductions, and property investment tax rules, refer to these official Australian Taxation Office resources:

Frequently Asked Questions

What is the capital gains tax discount in Australia?

If you've owned an asset for at least 12 months, you only pay tax on 50% of the capital gain. This means a $100,000 profit is taxed as $50,000 income. The discount applies to individuals but not companies.

Can I claim mortgage interest as a deduction against rental income?

Yes, you can deduct the interest portion of your mortgage payments against rental income. However, you cannot deduct the principal repayment. Your bank statement or mortgage statement will show how much is interest and how much is principal each month.

What's the difference between a repair and an improvement for tax purposes?

A repair restores something to its original condition and is deductible (e.g. fixing a broken window). An improvement makes it better than it was and is not deductible (e.g. adding a new bathroom). The ATO distinguishes based on whether the work restores or enhances.

Do I pay tax on capital gains every year I own a property?

No. You only pay tax on a capital gain in the year you sell the property. While you own it, you don't pay CGT. If you rent it out, you pay tax on the rental income each year, but the capital gain is only taxed when you sell.

Can I claim depreciation on a rental property in Australia?

Yes, you can claim depreciation on plant and equipment inside the property (carpets, appliances, light fittings) but not on the building structure itself. You need a professional depreciation schedule from a quantity surveyor to claim it.

What happens if I sell a property before 12 months?

You can still claim the capital gain, but you don't get the 50% discount. You pay tax on the full gain at your marginal tax rate. The 12-month holding period is measured from the date you acquired the asset to the date you entered into a contract to sell.

Can I claim deductions if I rent out only part of my property?

Yes, but only for the portion that is rented. If you rent out one room in a four-bedroom house, you can claim approximately 25% of your expenses. The ATO apportions deductions based on the area or number of rooms rented.

Is rental income taxed differently from other income in Australia?

No, rental income is added to your total taxable income and taxed at your marginal tax rate. However, you can deduct all expenses directly related to earning that income, which reduces your taxable amount.

This is general information only. It is not legal, migration, financial, tax, medical, or professional advice. Always check official sources before acting.