For many Australians, the family home is their largest asset. Selling it can feel straightforward, until questions arise about renting it out, working from home, moving interstate, buying another property or holding it through a business structure.
The good news is that a capital gain on a home can often be fully disregarded under the main residence exemption. The outcome depends on the property’s ownership, how it has been used throughout the ownership period and the choices available when it is sold. A little planning, and good records, can make a material difference.
Start with the main residence exemption
Australia does not have a separate “primary residence” tax category. For capital gains tax purposes, the relevant concept is whether a dwelling is your main residence.
In the basic case, a capital gain or capital loss on a dwelling can be disregarded where the owner is an individual and the dwelling has been their main residence throughout their ownership period. The exemption is not automatic simply because a property is called a “home” in everyday language. The facts need to support that it was genuinely your home. (legislation.gov.au)
Practical indicators can include where you and your family lived, where your belongings were kept, the address used for mail and official records, and whether utilities were connected and used. No single factor necessarily decides the issue. What matters is the overall reality of the arrangement.
For a full exemption, the property generally needs to have been:
- owned by you as an individual, rather than by a company or ordinary trust;
- your genuine main residence for the relevant period;
- not used in a way that reduces the exemption, such as for income-producing activities;
- within the area covered by the main residence rules; and
- sold while you remain eligible for the exemption.
A dwelling can include a house, apartment, strata unit or certain other residential interests. Land associated with the home may also be covered where it is used primarily for private or domestic purposes, although the legislation places a limit on the area of adjacent land that can be included. (legislation.gov.au)
The key message is simple: living in a property is important, but the wider history of ownership and use matters just as much.
Moving home, renting it out and using the absence rule
One of the most useful CGT concessions for homeowners is the ability to continue treating a former home as a main residence after moving out. This is commonly known as the absence rule.
Where you move out and do not use the former home to produce assessable income, you may be able to continue treating it as your main residence indefinitely. This can apply, for example, where the home is left vacant or occupied rent-free, provided you do not treat another dwelling as your main residence during the same period. (legislation.gov.au)
If you move out and rent the property, make it available for rent or otherwise use it to earn income, the rule can still be valuable. The legislation allows a former home to continue being treated as your main residence for a limited period while it is used to produce income. Each new period of absence may create a new period of eligibility if you move back in and the property again becomes your main residence. (legislation.gov.au)
This is not a free choice to exempt every property you own. If you use the absence rule for your former home, you generally cannot also treat another dwelling as your main residence for the same period, apart from the limited overlap available when changing homes. (legislation.gov.au)
That makes timing and documentation important. Before renting out a former home, consider:
- when you actually stopped living there;
- whether you have established another main residence;
- the expected rental period;
- whether the property was ever used to earn income before you moved out;
- the property’s market value when it was first used to produce income; and
- whether you may move back in before selling.
Changing from one home to another
It is common to buy a new home before the old one is sold. The law can allow both dwellings to be treated as your main residence for a limited overlap period, but conditions apply.
In broad terms, the old home must have been your main residence for a continuous period before sale, and it must not have been used to produce assessable income during the relevant time when it was not your main residence. The overlap is designed for a genuine move, not for maintaining exemptions across multiple properties indefinitely. (legislation.gov.au)
Do not assume that settlement dates alone determine the answer. For CGT purposes, the sale event usually happens when the contract is entered into, rather than at settlement. This can affect which income year includes the gain and whether a timing condition has been met.
Renting rooms, short-stay accommodation and running a business from home
Using part of your home to earn income can reduce the main residence exemption, even if you continue living there.
This can arise where you:
- rent out a bedroom;
- offer all or part of the property through a short-stay platform;
- run a business from a dedicated area of the home;
- use a detached studio, garage or shed for business activities; or
- claim deductions that reflect occupancy costs for an income-producing part of the property.
The law provides only a partial exemption where a dwelling is used to produce assessable income and, broadly, interest on borrowings to acquire the property would have been deductible to that extent. The gain is adjusted on a reasonable basis having regard to the income-producing use. (legislation.gov.au)
For small business owners and sole traders, it is important to distinguish between working from home and operating a business from home.
A person who occasionally works at the kitchen table or has a laptop in a spare room may not necessarily create a CGT issue. The position becomes more complex where an area is clearly set aside for the business, used exclusively or predominantly for that purpose, or where deductions are claimed for occupancy expenses such as mortgage interest, rent, council rates or insurance.
The ATO’s guidance highlights the importance of the interest deductibility test. In plain English, the question is whether you would be entitled to claim interest on money borrowed to acquire the home because of the way part of the property is used. If the answer is yes, a partial CGT exemption may apply on sale.
This does not mean you should avoid legitimate deductions automatically. It means the income tax benefit during ownership should be weighed against the potential CGT outcome on sale.
The market value rule can be crucial
If a property was fully exempt as your home before it was first used to produce income, a special rule may reset its cost base to market value at the time of that first income-producing use, provided the relevant conditions are met.
For example, if you live in a home for several years and then begin renting it out, the relevant starting point for a later partial CGT calculation may be the market value when it was first rented, rather than the original purchase price. (legislation.gov.au)
This is why obtaining a properly supported valuation when a home first becomes a rental property can be sensible. Trying to recreate a historical value many years later can be difficult, expensive and open to challenge.
Other situations that can limit the exemption
The main residence exemption has several boundaries that are easy to overlook.
Property held by a company or trust
The basic exemption applies to individuals. Holding a family home in a company or ordinary discretionary trust can therefore create significant CGT complications. A person may live in a property owned by their company or trust, but that does not by itself provide the same main residence outcome as personal ownership. (legislation.gov.au)
Before transferring a home into a company or trust, or buying a future home through one, obtain advice. A transfer can itself trigger tax consequences, and the structure may affect more than just CGT.
Couples with separate homes
Couples who are spouses for tax purposes and are not permanently living separately and apart need to make a choice if each has a different main residence. They can nominate one dwelling as the main residence of both, or nominate separate homes, but the exemption may need to be split depending on their ownership interests. (legislation.gov.au)
This is particularly relevant where one partner works away, one property is retained from before the relationship, or a family owns a city apartment and a regional home.
Larger properties and vacant land
A home on substantial land can still qualify for the exemption, but not necessarily for the entire property. The rules limit the area of adjacent land that can be covered, and a separate sale of vacant land or an additional lot may have a different CGT outcome from the sale of the home itself. (legislation.gov.au)
Vacant land also requires care. Owning land with the intention of building a home does not automatically make it exempt from CGT from day one. A specific rule may allow an exemption while building, repairing or renovating, but it requires the completed dwelling to become your main residence as soon as practicable and remain so for the required period. (legislation.gov.au)
Foreign residency and inherited homes
Foreign residency can significantly affect access to the main residence exemption. The law restricts the exemption where the owner is a foreign resident at the time of the CGT event, subject to limited life-event circumstances. This area is technical and should be reviewed before contracts are signed, particularly for Australians moving overseas or returning to Australia after an extended absence. (legislation.gov.au)
Inherited homes have their own rules. The deceased person’s use of the property, the beneficiary’s use after death and the timing of a sale can all affect the result. An inherited dwelling should be reviewed early in the estate administration process rather than shortly before sale. (legislation.gov.au)
Practical ways to minimise CGT exposure
The best CGT planning is usually done before a property changes use or is placed on the market. It is much harder to improve an outcome after years of rental income, business use or incomplete records.
Helpful steps include:
Move in genuinely and keep evidence. If a property is intended to be your home, occupy it as soon as practicable and retain practical evidence of residence.
Map every period of use. Record when you lived in the property, rented it out, made it available for rent, left it vacant, used rooms for business and moved back in.
Choose carefully between homes. When buying a replacement home, consider the limited overlap rules and the effect of using the absence rule for a former home.
Get a valuation at the right time. If a former home first becomes income-producing, a market valuation at that point may be essential for a future partial CGT calculation.
Keep complete property records. Retain purchase and sale contracts, legal and agent costs, improvement invoices, valuations, loan records and evidence of the property’s use. Records can help establish the cost base and support any available partial exemption.
Separate repairs from improvements. Capital improvements may be relevant to the cost base, while amounts already claimed as tax deductions generally cannot also be counted in the same way for CGT purposes.
Review the position before signing a sale contract. The contract date is usually the CGT event date, so waiting until settlement to seek advice may be too late for key planning decisions.
A practical example
Consider a sole trader who buys a home, moves in immediately and lives there for several years. Later, they accept work in another state and rent the whole property while living in rented accommodation elsewhere. They do not buy another home during that period.
Before renting out the property, they obtain a market valuation and keep copies of the lease, rental statements and records showing when they moved out. A few years later, they move back into the home and live there again before selling.
Depending on the precise timing, use of the property and choices made in their tax return, the former-home rules may allow the owner to continue treating the property as their main residence during the rental period. Their earlier valuation and clear timeline also place them in a far stronger position if only a partial exemption is available.
The same result may not apply if the owner bought another home and treated that second property as their main residence, ran a business from part of the first home before moving out, or remained a foreign resident when they sold.
The key takeaway
A main residence can often be sold without CGT, but the exemption is not something to assume. Renting out a former home, earning income from rooms or business space, owning more than one property, changing residency or using a company or trust can all change the outcome.
The most effective way to minimise CGT is to plan before the property’s use changes, keep detailed records and review the position well before signing a sale contract. If you are considering renting out, selling or restructuring a home, Ample Finance can help you understand the likely tax position and the options available for your circumstances.
This article is general information only and is not personal financial or tax advice. Speak with a registered tax agent or accountant, such as Ample Finance, about your specific circumstances before making decisions about a property transaction.