Selling a home that you once lived in can create an unexpected capital gains tax issue, particularly if you moved out and rented it while living elsewhere. The commonly discussed “6-year rule” can be valuable, but it is not an automatic exemption and it is not simply a six-year countdown from the day you leave.
For Australian taxpayers, the rule may allow a former home to keep its main residence status for CGT purposes while it is used to produce rental income. Used correctly, it can reduce or eliminate a capital gain on sale. Used without considering another home, business use or the timing of a move, it can lead to a partial exemption and an avoidable tax bill.
How the 6-year rule works for a former home
The 6-year rule is part of the CGT main residence exemption rules. In broad terms, if a property was genuinely your main residence and you later move out, you may choose to keep treating it as your main residence for CGT purposes.
Where the former home is used to produce assessable income, such as being rented to tenants or made available for rent, the choice can generally apply for up to six years during that absence.
This can mean that a property remains fully exempt from CGT even though you no longer live there and are receiving rental income from it. However, the outcome depends on your complete circumstances, not just the time the property has been rented.
The choice is particularly relevant for people who:
– move interstate or overseas for work
– relocate temporarily while planning to return home
– keep a former home as a rental investment
– move in with a partner while retaining their own property
– buy a new home before selling the old one
– need flexibility while their family, employment or business circumstances change.
The important point is that the rule allows a choice. It does not automatically apply merely because a property was once your home.
The property must have genuinely been your home first
A key condition is that the property must first have become your actual main residence. Buying a property with the intention of living there eventually, while renting it out from the start, does not usually create access to the full former-home concession for the earlier rental period.
Whether a dwelling is your main residence depends on the facts. Relevant indicators can include where you and your family live, whether you moved personal belongings in, where your mail is sent, your electoral enrolment address, connected utilities and your intention when occupying the home.
There is no simple minimum number of days that automatically proves a property was your main residence. Equally, a brief or artificial period of occupation undertaken mainly to access a tax outcome may not establish that the property was genuinely your home.
For practical purposes, keep evidence that supports the period you lived there, such as:
– settlement and moving records
– utility accounts and connection notices
– insurance documents
– electoral enrolment and mailing-address updates
– correspondence showing the property as your residential address
– records of when tenants moved in or rental advertising began.
This matters for owner-occupiers, investors and small business owners alike. If a business owner has held a property in a company or trust, or uses a home as part of a business structure, the ordinary individual main residence rules may not apply in the expected way. These arrangements need separate advice before a sale contract is signed.
The major trade-off: you usually cannot claim two main residences at once
The biggest trap in the 6-year rule is assuming that you can keep the former home exempt while also fully exempting a new home for the same period.
If you choose to continue treating the former home as your main residence, you generally cannot treat another dwelling as your main residence during the same period. There is a limited overlap rule when changing homes, but it is not a broad permission to claim two homes indefinitely.
This means a taxpayer may need to make a strategic choice between:
– treating the former home as their main residence for the absence period, or
– treating the new home as their main residence from the time they move in.
The best choice can depend on which property has the larger unrealised gain, how long each property is likely to be held, whether one will be sold soon, and whether either property has been used to generate income.
For example, someone may move from their long-held home into a newly purchased house and rent out the old home. If the old home has increased substantially in value, it may be more valuable to preserve its main residence status for part or all of the rental period. In other cases, the new home may be expected to grow more strongly in value or be held longer, making the opposite choice more suitable.
Couples require additional care. Different ownership interests, spouses living in different properties, relationship changes and jointly owned homes can affect the exemption available to each person. It is unwise to assume that each spouse can independently choose a different fully exempt home without examining the specific rules.
Renting, vacancy and moving back in
The six-year limit is relevant where a former home is used to produce assessable income. Renting the whole property is the most obvious example, but the issue can also arise where the property is listed or genuinely available for rent.
If the former home is not used to produce income after you move out, it may generally continue to be treated as your main residence for an unlimited period, provided you are not treating another dwelling as your main residence for the same period.
For example, you may move out and leave the property vacant, allow a family member to stay rent-free or use it as a holiday home. This does not necessarily mean the main residence status is lost. The consequences can change, however, if you later rent the property out, purchase another home or alter how the property is used.
A common misunderstanding is that simply removing tenants and leaving the property vacant resets a fresh six-year period. It does not necessarily do so. The legislation provides a new maximum period where the dwelling again becomes your main residence and later ceases to be your main residence. In practice, moving back in must be genuine, not merely a temporary arrangement designed to restart the clock.
A real-world style example helps show why this matters.
A sole trader buys and lives in a unit for several years. They then relocate to another city for a contract role and rent out the unit. After several years, they move back into the unit and genuinely make it their home again. Later, they accept another interstate role and rent the unit out once more. Provided the other conditions are met, each genuine period of absence after the unit has again become their main residence may have its own maximum six-year income-producing period.
By contrast, taking the property off the rental market for a short period while continuing to live elsewhere does not, by itself, mean a new six-year period has begun.
Business use, rooms for rent and the first-income-use market value rule
The 6-year rule should not be viewed in isolation. Using a home to produce income before moving out can affect the result, even if the property is later rented as a whole.
For example, a partial exemption may arise where you used part of the home as a dedicated business area, ran a practice from a separate section of the property, rented rooms on a continuing basis or claimed deductions that reflect an income-producing use of part of the dwelling.
Working from home occasionally is not automatically the same as using part of the home to produce assessable income. The outcome depends on the nature and extent of the use, including whether a distinct part of the property was set aside for business or rental purposes.
Where a former main residence is first used to produce income and the taxpayer would otherwise have been entitled to a full main residence exemption immediately before that change, a special market-value rule may apply. In that situation, the property can generally be treated as having been acquired at its market value when it was first used to produce income.
This rule can be important where a property has increased in value while it was a fully exempt home before becoming a rental property. It may mean that the taxable gain is calculated from the market value at the change-of-use date, rather than from the original purchase price.
That is why obtaining a professional market valuation when a home first becomes a rental property can be sensible. Trying to reconstruct a valuation years later can be more difficult, more costly and less reliable.
What happens if the property is rented for more than six years?
Exceeding the six-year period does not necessarily mean the entire main residence exemption is lost. Instead, a partial exemption may apply.
The taxable portion is generally worked out by reference to the period the dwelling was not treated as your main residence, compared with the relevant ownership period. The calculation can also be affected by the first-income-use market value rule, the costs included in the property’s cost base and whether any part of the property was used for income-producing purposes before you moved out.
A partial exemption is often more complex than people expect. It may involve reviewing:
– the date the property was first occupied as a main residence
– the date you moved out
– the date rental income started
– periods when the property was vacant
– periods when you moved back in
– the date another home became your main residence
– the property’s market value when first used to produce income
– purchase costs, improvement costs and selling costs
– any capital losses available to offset a capital gain.
A remaining capital gain may also be eligible for the general CGT discount if the relevant conditions are met. However, this should not be assumed, particularly where there has been foreign residency, a change in ownership, a trust or company structure, or other unusual circumstances.
Foreign residents should obtain advice before relying on the former-home rule. The main residence exemption is restricted for many foreign residents, with limited exceptions. Australians moving overseas, or returning to Australia after time abroad, should review both their tax residency position and the CGT outcome before selling.
Make the choice deliberately and keep the right records
The choice to treat a former home as your main residence is generally made when preparing the tax return for the income year in which the relevant CGT event occurs. For a standard property sale, the relevant timing is generally the date the sale contract is signed, not the settlement date.
That timing can catch people out. A contract signed close to EOFY may require CGT planning and reporting sooner than expected, even if settlement occurs later.
Before placing a former home on the market, prepare a clear timeline of ownership, occupation and rental use. This should include the dates you moved in and out, periods of rental availability, tenant dates, periods of vacancy and details of any other home you owned or occupied.
It is also wise to retain:
– the purchase contract and settlement statement
– legal fees, stamp duty and acquisition costs
– records of capital improvements, such as renovations
– sale contracts, agent commissions and legal costs
– property manager statements and rental listings
– evidence of main residence occupation
– market valuation evidence from the first income-producing use of the property
– prior tax returns and CGT calculations.
Good records do more than support a tax return. They allow you to compare available main residence choices before a sale, rather than discovering the outcome after the contract has been signed.
The practical takeaway
The 6-year rule can be a useful CGT planning tool for Australians selling a former home, but it works best when the decision is made with a full view of both properties, the rental timeline and future plans.
The former property must have genuinely been your main residence, the use of another home must be considered, and business or rental use can complicate the outcome. A six-year period may protect a former home from CGT, but it is not a blanket exemption and it may not be the best choice in every situation.
This article is general information only and is not personal financial or tax advice. Before selling a former home or deciding which property to treat as your main residence, speak with a registered tax agent or accountant, such as, about your specific circumstances.