Selling your home can come with a range of financial considerations, but one of the most important is whether or not you’ll need to pay capital gains tax (CGT). Fortunately, many Australians are eligible for a CGT concession known as the main residence exemption. If you meet certain conditions, this exemption can reduce or completely eliminate your tax bill when you sell your home.

In this guide, we’ll break down the basic eligibility requirements and address a few common mistakes people make when trying to claim it.

What Is the Main Residence Exemption?

The main residence exemption is a tax concession that applies when you sell the property you’ve been living in as your primary home. Unlike investment properties, your main residence is generally not subject to CGT — but only if specific criteria are met.

Depending on your situation, you may be eligible for a full exemption or a partial one.

The Core Requirements for a Full Exemption

To benefit from the full exemption, you’ll generally need to tick all of the following boxes:

1. The Property Was Your Main Home

This might sound obvious, but it’s important. The property must have been your primary residence during the time you owned it.

The ATO doesn’t have a strict checklist, but they do look at indicators such as:

  • Where you and your family lived most of the time
  • Your mailing address on key documents like your driver’s licence or electoral roll
  • How the utilities were connected and in whose name
  • Whether you genuinely intended to live in the property as your home

Just owning a property doesn’t make it your main residence. You have to show that you actually lived there.

2. You Didn’t Earn Income From It

To claim the full exemption, the property must not have been used to generate income during the ownership period. That means no renting it out or using it for business purposes.

If you rented it for part of the time, you may still be eligible for a partial exemption; however, the calculation becomes more complex.

3. The Land Size Is Within Limits

The exemption covers land up to two hectares (roughly five acres) around your home. If your property is on a larger block, only the area used for private purposes (like your backyard or garden) may qualify.

4. You’re a Tax Resident of Australia

Only individuals who are Australian tax residents can access the main residence exemption in full. Since July 2020, non-residents generally no longer qualify, unless exceptional circumstances apply, such as the property being sold after the owner’s death or due to a terminal illness.

When You Might Only Get a Partial Exemption

In real life, things are rarely black and white. There are several situations where you could still qualify for a partial exemption, such as:

  • Renting out the home during part of the ownership period
  • Moving out and relying on the 6-year rule (we’ll get to that shortly)
  • Living in the property for only a portion of the time you owned it
  • Sharing ownership with someone else

The 6-Year Rule Explained: A Key Exemption Flexibility

One of the more flexible aspects of the exemption is the 6-year rule. It allows you to treat a property as your main residence even after moving out — for up to six years — provided you don’t nominate another property as your main residence during that time.

This rule is especially useful if you’ve had to relocate for work or family reasons, or if you’ve decided to lease out your home temporarily.

Here’s how it works in a nutshell:

  • You move out of your home
  • You don’t claim another property as your main residence
  • You can still treat your old home as your main residence for tax purposes
  • You can claim this for up to six years while it’s rented, or indefinitely if it’s not producing income

This can be a real game-changer for individuals navigating career changes, life transitions, or investment opportunities.

Keeping the Right Records for Your Claim

Claiming the exemption means you’ll need to back it up. Keep clear records throughout your ownership, including:

  • The original purchase and sale contracts
  • Council rates and water bills showing your name and address
  • Utility bills to confirm periods of occupancy
  • Rental statements or lease agreements if the property was tenanted

The ATO is more likely to accept your claim if you can provide consistent evidence that the property was genuinely your home.

Watch Out for These Common Mistakes

Plenty of people assume they qualify for the main residence exemption, only to be surprised at tax time. Here are some common traps:

  • Thinking any property you live in is automatically CGT-free
  • Forgetting to apply the 6-year rule correctly
  • Renting out a room (e.g. through Airbnb) without considering the tax impact
  • Failing to update key documents like your electoral roll or utility accounts

A bit of planning can go a long way in helping you avoid these headaches.

Don’t Guess — Get Proper Advice

Navigating CGT rules is rarely straightforward, particularly if your property has a complex history — such as mixed-use, joint ownership, or periods of vacancy.

If you’re preparing to sell and want clarity about your tax position, it’s worth getting expert advice before settlement. That way, you’ll avoid any unpleasant surprises and make sure you’re not leaving money on the table.

Need Guidance on Your CGT Exemption?

At A Plus Accountant, we specialise in helping property owners make sense of their tax obligations. Whether you’ve lived in your home for decades or only recently moved out, we’ll guide you through your options and help you make a well-informed decision.