Running a business from home has become increasingly common in Australia. Many sole traders, consultants, tradies and small business operators run part of their business from a home office, workshop or studio.
While operating from home can reduce overhead costs and provide flexibility, it can also have tax implications when you sell your home.
Recent guidance from the Australian Taxation Office has clarified how home-based businesses interact with capital gains tax (CGT) and the small business CGT concessions.
For homeowners who operate businesses from their property, understanding these rules is critical before claiming deductions or planning the future sale of the home.
Understanding the Main Residence CGT Exemption
Under Australian tax rules, individuals can usually claim a full CGT exemption on their main residence when they sell it.
This means that any capital gain made on the sale of the property is generally not subject to capital gains tax.
However, according to the Australian Taxation Office guidance on home-based businesses and CGT, the exemption can be reduced if part of the property has been used to generate business income.
Examples include:
- Running a business from a dedicated office
- Operating a salon, studio or workshop at home
- Using part of the property for commercial activities
In these situations, the homeowner may only qualify for a partial main residence exemption, meaning a portion of the capital gain may still be taxable.
When Small Business CGT Concessions May Apply
If the full main residence exemption does not apply, taxpayers often look to other tax concessions to reduce capital gains tax.
These may include:
- The 50% CGT discount for assets held longer than 12 months
- The small business CGT concessions
The small business CGT concessions can significantly reduce or even eliminate capital gains tax, but only if strict eligibility requirements are met.
According to the Australian Taxation Office, one of the most important requirements is the active asset test.
The Active Asset Test Explained
The active asset test is a key condition for accessing the small business CGT concessions.
In simple terms, the asset must be actively used in a business for a significant portion of the ownership period.
Typically, the asset must be used in the business for:
- At least 7.5 years, or
- At least half of the total ownership period
However, the ATO has clarified an important point.
The active asset test applies to the entire property, not just the section used for business.
This means the property either qualifies as an active asset in full or does not qualify at all.
Simply having a home office or claiming home occupancy deductions does not automatically make your home an active asset.
Why Most Home-Based Businesses Do Not Qualify
The ATO’s position is that minor or incidental business use of a home is generally not enough to qualify for the small business CGT concessions.
In many cases, the property’s primary purpose remains residential, even if some business activities occur there.
Examples of incidental business use may include:
- A home office used occasionally
- Storage of tools or equipment
- Administrative work completed from home
In these cases, the property is still primarily a residence, which means the small business CGT concessions typically do not apply.
Case Law Example: Rus v Commissioner of Taxation
The ATO’s interpretation of the active asset rules is supported by legal precedent.
A key case is Rus and Commissioner of Taxation, where the Administrative Appeals Tribunal examined whether a rural property qualified as an active business asset.
In this case:
- The taxpayer owned a 16-hectare property
- Less than 10% of the land was used for business activities
- The business involved plastering and construction work
The property contained:
- A home office
- A shed used to store tools and equipment
- Vehicles and business supplies
However, most of the business activities were conducted off-site at customer locations. The tribunal concluded that the property did not qualify as an active asset, because the business use was relatively minor compared with the residential nature of the property.This case reinforced the ATO’s view that the property must be considered as a whole when applying the active asset test.
Examples of How the ATO Applies CGT Rules to Home Businesses
Understanding how these rules apply in practice can help homeowners avoid unexpected tax consequences.
Example 1: Minor Home Business Use
Harriet runs a small hairdressing business from a spare room in her home.
- The business occupies around 7% of the home’s floor space
- Clients visit the property for several hours each week
- Harriet claims deductions for home occupancy expenses
When Harriet sells the home:
- She receives a 93% main residence CGT exemption
- However, the property does not qualify for the small business CGT concessions
She may still be eligible for the 50% CGT discount if she has owned the property for more than 12 months.
Example 2: Significant Business Use
Sue and Rob own a two-storey property.
- The ground floor operates as a takeaway business
- The upper level is their private residence
- The business occupies roughly 50% of the building
The business has been operating for many years and employs staff.
In this situation:
- The property may qualify as an active asset
- The owners may be eligible for small business CGT concessions on the portion not covered by the main residence exemption
The significant commercial use of the property makes the difference.
Key Tax Planning Considerations for Home-Based Businesses
If you run a business from home, there are several important tax planning considerations to keep in mind.
A Partial Main Residence Exemption Does Not Guarantee CGT Concessions
Many homeowners assume that if they lose part of their main residence exemption, they can automatically claim small business CGT concessions.
According to the Australian Taxation Office, this is not necessarily the case.
The active asset test must still be satisfied.
Keep Detailed Records of Business Use
Maintaining accurate records can be essential for future tax planning.
Helpful documentation may include:
- Floor plans showing business areas
- Records of business hours
- Evidence of deductions claimed
These records may help support calculations if the property is sold.
Seek Advice Before Changing How Your Home Is Used
Starting a business from home or expanding its use may affect:
- Capital gains tax exposure
- Deduction claims
- Eligibility for CGT concessions
Professional advice before making changes can prevent unexpected tax outcomes later.
Why Planning Ahead Matters for Property Owners
For many Australians, their home is their most valuable asset.Running a business from home can generate income today, but it may also affect the tax outcome when the property is eventually sold.
In some cases, a small amount of additional business income could potentially result in a larger capital gains tax liability in the future.Understanding how the ATO applies CGT rules allows homeowners to make better long-term decisions.
The Bottom Line: ATO Guidance on Home-Based Businesses and CGT
The latest guidance from the Australian Taxation Office highlights an important message for homeowners who run businesses from home.
Minor or incidental business use of a residential property will generally not qualify the property for small business CGT concessions.
This means that many home-based business owners may only receive a partial main residence exemption and the standard CGT discount, rather than the more generous small business concessions.
Because every situation depends on the specific facts, proactive tax planning is essential.
Before starting a business at home or planning to sell your property, professional advice can help ensure you understand the potential capital gains tax implications.
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