Introduction

Selling property in Australia can trigger Capital Gains Tax (CGT), which may significantly reduce your profits. However, the Capital Gains Tax 6 Year Rule offers a powerful way to minimise – or even eliminate – CGT when selling your former home. In this guide, we break down what the 6 Year Rule is, who it applies to, and how you can use it to your advantage.

What Is Capital Gains Tax (CGT) and Why Is It Important?

  • Capital Gains Tax applies when you sell an asset (such as real estate) for more than its cost base (purchase price + associated costs).
  • Your main residence is generally exempt from CGT.
  • If you move out and rent your home, that exemption can end – unless the 6 Year Rule applies.

What Is the Capital Gains Tax 6-Year Rule?

Under Australian tax law, if you move out and rent out your home, you can still treat it as your main residence for up to six years for CGT purposes.

Key conditions include:

  • The property was your main residence before being rented.
  • You do not nominate another property as your main residence during this period.
  • The property is sold within six years of being rented.
  • If the property is left vacant, the exemption can apply indefinitely.

How Does the Capital Gains Tax 6 Year Rule Work?

The six-year period resets if you move back in and re-establish the property as your main residence. There’s no limit on how many times this can be done so long as your return is genuine.

Real-Life Examples of the Capital Gains Tax 6 Year Rule

Scenario 1: Temporary Work Relocation

Example:
Katelyn buys a home in 2015 and lives there as her main residence until 2020. She then moves interstate for work and rents out the property. In 2025, she decides to sell.

Explanation:
Because Katelyn sells the property within six years of moving out and has not nominated another property as her main residence during that time, the entire gain is exempt from CGT.

Scenario 2: Renting Beyond Six Years

Example:
John buys a home in 2010 and lives there for five years. In 2015, he moves out and rents it for eight years before selling in 2023.

Outcome:
When John first rents the property, its market value at that time becomes the starting point for calculating any future gain. Because he sells after 13 years, the exemption covers the first 11 years (5 years living + 6 years under the rule), leaving only 2 years taxable. This means CGT is calculated on the increase in value from the time he started renting, and only a small fraction of that gain is assessable.

Note:
This example assumes the property qualifies for a market value uplift when first rented, which generally applies if the property was your main residence up to that point and meets the relevant conditions.

Scenario 3: Resetting the Clock by Moving Back In

Example:
Rebecca buys in 2012 and lives there for four years. She rents it out for three years, moves back in for two years, then rents it again for four years before selling.

Explanation:
Each time Rebecca moves back in and re-establishes the property as her main residence, the six-year rule resets. This allows multiple exemption periods, reducing her taxable gain significantly.

Scenario 4: Leaving the Property Vacant

Example:
Charlie moves out of his home and leaves it vacant for 12 years before selling.

Outcome:
If Charlie does not rent the property and does not nominate another home as his main residence, the exemption can apply indefinitely. This is different from renting, where the six-year limit applies.

Scenario 5: Buying Another Main Residence

Example:
Hamish owns a home in Brisbane and moves out, renting it for four years. He then buys a home in Sydney and lives there.

Explanation:
Once Hamish nominates the Sydney property as his main residence, the Brisbane property stops being exempt under the six-year rule. Any gain after that point becomes taxable.

Key Conditions to Claim the Capital Gains Tax 6 Year Rule

  • Only one property can be treated as your main residence at a time (short overlap allowed—up to 6 months).
  • You must keep accurate records:
    • Dates of occupancy and rental periods.
    • Property valuations at time of rental.
    • Any depreciation claimed (affects the cost base).

Benefits of the Capital Gains Tax 6 Year Rule

  • Save thousands in potential CGT liabilities.
  • Offers flexibility during relocations or investment transitions.
  • Allows you to reset the exemption clock by moving back in.

Limitations of the 6 Year Rule

  • Renting beyond six years results in a partial exemption.
  • Income-producing use (e.g. Airbnb, home office) may reduce the exempt amount.
  • Foreign residents typically cannot claim this exemption.

Frequently Asked Questions

Can I use the Capital Gains Tax 6 Year Rule on an investment property I never lived in?
No. You must have established the property as your main residence first.

What if I leave the property vacant?
You may claim the main residence exemption indefinitely.

How often can I reset the six-year clock?
Unlimited times, as long as you genuinely move back in.

What records should I maintain?

  • Dates of occupancy and rental
  • Property valuations
  • Depreciation schedules

Ready to Maximise Your CGT Savings?

The Capital Gains Tax 6 Year Rule can be a game-changer but the rules are complex. At Davidsons Accountants and Business Consultants, we help clients:

  • Confirm eligibility for CGT exemptions
  • Calculate potential savings
  • Ensure full ATO compliance

📞 Contact us today to protect your property profits and plan a smarter investment exit strategy.
More info about our Tax services is available here

Disclaimer:
The scenarios provided are for illustrative purposes only and focus on Capital Gains Tax (CGT) implications. They do not take into account other taxes or charges, such as land tax or stamp duty, which may vary depending on property use and state-based legislation. Individual circumstances can differ significantly, so we strongly recommend seeking personalised advice from a qualified tax professional before making any decisions.