Principal Place of Residence Exemption: How Australians Can Reduce Capital Gains Tax When Selling Their Home

Selling a home can involve a significant increase in value, particularly where the property has been held for many years. The good news is that Australia’s principal place of residence exemption, commonly called the main residence exemption, can allow an eligible individual to disregard some or all of a capital gain when selling their home.

However, the exemption is not automatic in every situation. Renting out the property, working from a dedicated business area, owning more than one home, moving overseas or holding the property through a trust can all change the outcome. Understanding the rules before you sign a sale contract can help you identify issues early and keep the right records.

The basic main residence exemption

Capital gains tax, or CGT, is not a separate tax. Instead, a net capital gain is generally included in your assessable income and taxed as part of your income tax position.

For the full main residence exemption, the core rule is that the dwelling must have been your main residence throughout your ownership period. The exemption is available to individuals, subject to important qualifications, and can disregard both a capital gain and a capital loss on the home.

A dwelling can include more than a freestanding house. It may also include an apartment, strata unit, retirement-village unit, caravan, houseboat or other mobile home used mainly for residential accommodation.

In practical terms, a full exemption is most likely where you:

• owned the property in your personal name;
• genuinely lived in it as your home for the whole ownership period;
• did not use all or part of it to produce assessable income; and
• sold the dwelling together with land that falls within the relevant private and domestic use rules.

The legislation can also extend the exemption to adjacent land used primarily for private or domestic purposes in connection with the home. There is a maximum exempt area of two hectares, including the land underneath the dwelling. Land beyond that area, or land used for another purpose, may require a separate CGT calculation.

It is important to distinguish between a property you own and a property you simply regard as home. The legal ownership structure matters. The ordinary main residence exemption is a concession for an individual’s ownership interest, so a home owned by a company, discretionary trust or SMSF should not be assumed to qualify simply because a director, beneficiary or member lives there. Special rules can apply in limited circumstances, but these arrangements need tailored advice before a sale or transfer takes place.

What makes a property your main residence?

There is no single administrative step that conclusively makes a property your main residence for CGT purposes. Instead, the facts need to support the conclusion that the dwelling was genuinely your home.

The ATO considers practical indicators such as whether you and your family lived there, whether your personal belongings were kept there, where your mail was delivered, the address on the electoral roll, and whether utilities such as gas and electricity were connected. These factors are considered together, rather than as a checklist where one item determines the result.

Moving in promptly matters too. Where a home becomes your main residence by the time it is first practicable to move in after acquisition, the legislation can treat it as your main residence from when you acquired the ownership interest. Delays caused by genuine settlement, construction or renovation issues may be relevant, but a deliberate decision to rent the home out first can create a period that is not covered by the full exemption.

This is particularly relevant for buyers who purchase a property, lease it to tenants, then move in later. You may still receive a partial exemption when you eventually sell, but the period before it became your home may be taxable.

A property can also stop being your actual main residence when you move out. Keeping an electoral address or some belongings at the old home does not, by itself, settle the CGT position. The surrounding facts, including where you and your family actually live, remain important.

Moving house, renting out a former home and the six-year absence rule

Australians often buy a new home before selling the old one, relocate for work, or keep a former home as an investment property. The main residence rules recognise that life does not always fit neatly around settlement dates.

When changing homes, both dwellings may be treated as your main residence for a limited overlap period. The overlap is generally available for the shorter of six months before the old home is disposed of, or the period between acquiring the new home and disposing of the old one. Conditions apply, including requirements relating to how the old home was used before sale.

The commonly discussed “six-year rule” is part of the absence rule. If a dwelling was your main residence and you later move out, you may choose to continue treating it as your main residence for CGT purposes.

Where the former home is used to produce income, such as through a long-term rental or short-term accommodation arrangement, the maximum period for this choice is six years for each qualifying absence. If the property is not used to produce assessable income while you are away, the absence rule may allow it to be treated as your main residence indefinitely.

There is an important trade-off. While you choose to keep treating the former home as your main residence, you generally cannot also treat another dwelling as your main residence, apart from the limited moving-house overlap. This means the choice should be made strategically, particularly where both properties have increased in value.

A simple example

Consider a sole trader who buys a home, moves in straight away and lives there for several years. They then accept a temporary interstate contract, move into rented accommodation and lease their former home to tenants.

If they sell the former home within the applicable absence-rule period, and do not choose to treat another property as their main residence during that time, the gain may still be fully disregarded. If they instead buy and occupy another home, the outcome may be a partial exemption because they may need to decide which property is treated as their main residence for the relevant period.

The choice is generally made when preparing the tax return for the year in which the sale contract is signed. It is therefore wise to model the likely CGT outcomes before selling either property, rather than making the decision after the fact.

Renting rooms or running a business from home

Using your home to earn income can reduce the main residence exemption, even if you continue living there.

Examples include:

• renting out a bedroom to a tenant or through a short-term accommodation platform;
• using a granny flat or separate area of the property to earn rent;
• operating a business from a dedicated room, studio, consulting room or workshop;
• claiming occupancy expenses for a specific business area; or
• using part of the property in a way that would support deductions for home loan interest.

The law applies a partial exemption where a dwelling was used to produce assessable income and interest on money borrowed to acquire it would have been deductible to some extent. The calculation should reasonably reflect the income-producing use of the property.

For a home-based business, there is an important distinction between occasional work and an area set aside for business use. Merely answering emails from the kitchen table or undertaking administrative work from a shared room will not necessarily create a CGT issue. The ATO’s guidance indicates that CGT may not apply where there was no area specifically set aside for business activities and no occupancy expenses were claimed.

The position can be different where, for example, a clinician uses a dedicated consulting room, a hairdresser operates a studio from a converted garage, or a tradesperson uses a clearly separate workshop. In those cases, the property may have a taxable component based on the area used and the time it was used to produce income.

If the home was fully exempt before it was first used to produce income, a market-value rule may apply. Broadly, it can reset the property’s CGT cost base to market value at the time income-producing use first begins. A professional valuation at that point can be highly valuable evidence, especially if the property will be rented for an extended period or used substantially in a business.

For small business owners, this is an area where the interaction between business deductions, the main residence exemption and possible small business CGT concessions should be considered together. Claiming a deduction now can have a later CGT consequence, so the right answer is not always simply to claim every available occupancy expense.

Partial exemptions are still valuable

Not meeting every condition for a full exemption does not mean the entire gain is taxable. The law provides for a partial exemption where the dwelling was your main residence for only part of the ownership period. In broad terms, the taxable proportion is based on the number of days the property was not your main residence compared with the total ownership period.

A partial exemption may arise where you:

• rented the property before moving in;
• moved out and rented it for longer than the applicable absence-rule period;
• used a defined part of the home for rental or business purposes;
• bought a new home but kept the former home beyond the permitted overlap period;
• owned land while building or renovating before moving in; or
• were not eligible for the exemption because of residency or ownership-structure issues.

If a taxable capital gain remains after applying the main residence rules, other CGT provisions may still reduce it. For example, an individual or trust may be eligible for the CGT discount where the relevant conditions are met, including the minimum ownership requirement. The discount is applied after capital losses are offset and before most small business CGT concessions. Companies cannot use the general CGT discount.

The order of calculations matters. A CGT calculation should not be approached by simply applying a discount to the property’s sale profit. The starting point is to establish the correct capital proceeds, cost base, exempt and taxable periods, any market-value reset, available capital losses and relevant concessions.

Building, renovating, inherited homes and overseas moves

The main residence rules contain special provisions for common life events, but each has detailed conditions.

If you build, repair or substantially renovate a home, you may be able to choose to treat the land as your main residence for a period before you physically move in. The choice is subject to conditions, including moving in as soon as practicable after the work is finished and continuing to use the dwelling as your main residence for at least three months. The choice generally operates for no more than four years before the dwelling becomes your main residence, unless the Commissioner allows a longer period.

Inherited property also requires care. A capital gain or loss on a dwelling acquired from a deceased estate may be disregarded in certain circumstances, including where the deceased acquired the property after the start of the CGT regime, it was their main residence just before death and was not then used to produce assessable income, and the beneficiary’s or trustee’s ownership interest ends within two years of death or a longer period allowed by the Commissioner. Different rules apply to older properties and to homes occupied after death by certain eligible individuals.

Foreign residency is another major risk area. A person who is a foreign resident when the relevant CGT event occurs is generally unable to access the main residence exemption, unless a limited statutory exception applies. Australians planning an overseas move should obtain advice before selling, because residency status at the time of sale can fundamentally alter the result.

Finally, property “flipping” deserves separate attention. Where a property is acquired, renovated or developed with a profit-making purpose, the proceeds may potentially be treated differently from an ordinary capital gain. Living in the property for a period does not automatically guarantee that the main residence exemption will apply. The facts, purpose and commercial nature of the activity all matter.

Keep records and plan before signing the contract

The sale contract date, rather than settlement date, is generally the date relevant for reporting the CGT event. This can affect which income year the capital gain, capital loss or exemption is reported in.

Good records make a material difference if a full exemption is unavailable or later questioned. Keep:

• purchase and sale contracts;
• settlement statements;
• legal, conveyancing and agent invoices;
• records of capital improvements, renovations and extensions;
• evidence of when you moved in and moved out;
• rental agreements and property-manager statements;
• records of the floor area and periods used for rental or business;
• a market valuation from the date income-producing use first commenced, where relevant; and
• notes explaining any choice made between two possible main residences.

The principal place of residence exemption can be one of the most valuable CGT concessions available to individual Australians, but it rewards planning and accurate records. A home that begins as a straightforward residence can become more complex once it is rented, used for business, inherited, renovated, transferred or held alongside another property.

This article is general information only and is not personal financial or tax advice. Before selling a home or making a decision about renting, business use or ownership structures, speak with a registered tax agent or accountant, such as, about your specific circumstances.