Capital gains tax: how one family slashed their property tax bill
An Australian family saved almost $14,000 on capital gains tax by meticulously tracking holding costs for their investment property. Discover how their strategy can help investors maximise returns in a complex tax landscape.
Australia’s property market, a powerhouse generating over $80 billion in taxes annually, demands savvy navigation of capital gains tax (CGT) rules.
For property investors, CGT can significantly erode profits, even with residents benefiting from a 50 per cent discount on assets held over 12 months. Non-residents face steeper rates.
In 2025, with the Foreign Resident Capital Gains Withholding rate rising to 15 per cent, strategic planning is more critical than ever.
The following case study showcases an Australian family who saved nearly $14,000 on their investment property sale through meticulous record-keeping.
By leveraging often-overlooked holding costs from non-income-producing years, they slashed their taxable capital gain, turning a complex tax obligation into a financial win.
Their journey, rooted in fastidiously utilising and adhering to Australian Taxation Office (ATO) rules, offers a blueprint for investors—whether local, expatriate, or international—seeking to maximise returns. From council rates to insurance premiums, every receipt counts.
Read on to discover how this family’s diligence transformed their tax outcome, providing practical lessons to boost your property investment strategy in Australia’s dynamic market.
The situation
Two parents purchased a property for $600,000 for their daughter to live in while studying.
- First 5 years: Daughter lived in the property, no rent received.
- Next 10 years: Property rented out as an investment.
- After 15 years: Property sold for $1.2 million.
Because the property was never their own home, it did not qualify for the main residence CGT exemption.
The key issue
The parents paid about $15,000 per year in holding costs (loan interest, council rates, insurance, etc.).
- In the first 5 years, these costs could not be deducted because no rent was received.
- In the next 10 years, the same costs were deductible against rental income.
The ATO rules mean that non-deductible holding costs from the private years can be added to the property’s cost base. This directly reduces the capital gain when the property is eventually sold.
Detailed cost base calculation
Step 1: Starting point – purchase
- Purchase price: $600,000
Step 2: Acquisition costs
- Stamp duty: $25,000 (example)
- Legal fees: $5,000
Total acquisition costs = $30,000
Step 3: Holding costs during private use (first five years, no rent)
- Loan interest: $10,000 per year × 5 = $50,000
- Council rates: $2,000 per year × 5 = $10,000
- Insurance: $3,000 per year × 5 = $15,000
Total holding costs added = $75,000
Step 4: Disposal costs (when selling)
- Agent’s commission: $25,000
- Legal fees: $5,000
Total disposal costs = $30,000
Final cost base = $600,000 + $30,000 + $75,000 + $30,000 = $735,000
Capital gain with and without holding costs
With private holding costs added:
- Sale price: $1,200,000
- Cost base: $735,000
- Capital gain: $465,000
- 50 per cent discount: $232,500 taxable
Without adding private holding costs:
- Sale price: $1,200,000
- Cost base: $660,000
- Capital gain: $540,000
- 50 per cent discount: $270,000 taxable
Side-by-side comparison
| Scenario | Cost base | Capital gain | Discounted capital gain | Difference |
|---|---|---|---|---|
| Ignoring 5 years of holding costs | $660,000 | $540,000 | $270,000 | – |
| Including 5 years of holding costs | $735,000 | $465,000 | $232,500 | $37,500 less taxable |
The outcome
By keeping full records:
- The parents claimed $150,000 of deductions during the 10 rental years, reducing annual tax bills.
- They added $75,000 of private-period holding costs into the cost base, reducing the taxable capital gain.
- On sale, they paid tax on $37,500 less income, saving nearly $14,000 in tax (at a 37 per cent marginal tax rate).
The takeaway
Even when a property is not producing income, holding costs are not wasted. If recorded, they can be added to the cost base and reduce CGT when the property is sold. Families who keep every receipt, from rates notices to insurance premiums – can unlock thousands in savings at the end of ownership.
Additional reporting by Craig Francis, Editor, API Magazine
