Short-term rental hosting — via Airbnb, Stayz, Booking.com, or direct letting — has grown substantially as a supplementary income source for property owners. The bookkeeping and tax obligations are more complex than many hosts realise, and they differ from both long-term residential rental (which is input-taxed for GST purposes and treated as passive investment income) and commercial accommodation (which is taxable). Getting the characterisation right has material GST, income tax, and CGT consequences.
Is Short-Term Rental a Business or a Passive Investment?
The threshold question is whether the hosting activity constitutes carrying on a business or merely receiving passive rental income. The ATO's guidance (LCR 2021/2, the practical compliance guideline for short-term residential accommodation) and the Airbnb tax context applies different rules depending on the answer.
For most individual hosts renting out a single property or a spare room, the activity is treated as investment income, not a business. The rental income is included in assessable income; deductible expenses are those set out in Schedule 3 to the ITAA 1936 and in TR 93/32. The GST treatment (discussed below) depends on the nature of the supply, not the business/investment characterisation.
For operators managing multiple properties with substantial involvement — cleaning, linen, and concierge services — the activity may be a business. Business characterisation opens access to small business tax concessions but also brings GST registration obligations and the need for a proper set of books rather than a spreadsheet.
GST: Short-Term Rental Is Taxable, Not Input-Taxed
This is the most commonly misunderstood aspect of short-term rental tax. Residential rent is input-taxed — the landlord does not charge GST and cannot claim GST credits on property expenses. But short-term holiday rental (lettings of less than 28 consecutive days) is a taxable supply under the GST Act.
The consequence: if your client's short-term rental income exceeds $75,000 per year (the GST threshold), they are required to register for GST, charge GST on their accommodation fees, and remit the GST to the ATO. They can claim GST credits on expenses related to the taxable supply (cleaning, maintenance, furnishings, utilities).
For hosts earning below $75,000 from short-term rentals, GST registration is optional. Many hosts choose not to register, particularly if they are using platforms that handle GST at the platform level — but note that platforms like Airbnb charge the guest GST on top of the listed price and remit it to the ATO, which is the platform's own obligation (not the host's). This is a separate issue from whether the host needs to be registered and account for GST on their own accommodation income.
For a host with both short-term rental income (taxable, above the threshold) and long-term rental from another property (input-taxed), the GST registration and apportionment between taxable and input-taxed activities must be managed carefully.
Expense Apportionment: Mixed Use Property
If the property is used partly for holiday letting and partly for private use (the owner stays there some of the time), expenses must be apportioned. The ATO's method is:
- Calculate the number of days the property is genuinely available for rent in the year
- Calculate the number of days the property was actually rented
- Days of private use are not deductible at all
- Days of genuine availability (listed, marketed, not blocked for personal use) may be partially deductible — but the ATO scrutinises claimed "available days" that are in peak season when the property coincidentally happened not to be booked
- Expenses that relate only to the rented period (cleaning between guest stays, linen replacement) are fully deductible
The ATO's PCG 2021/D5 provides the practical compliance approach for private/rental apportionment. The most defensible approach is a day-count method based on documented availability and booking records from the platform.
Platform Income and Fees
Airbnb and other platforms pay hosts net of their service fee (typically 3–5% for hosts). The correct accounting treatment is to record gross rental income and the platform fee as a separate operating expense. Using net receipts as the revenue figure understates both income and expenses.
Airbnb provides a host earnings summary and a detailed transaction history — both are available from the host account. The year-end summary gives the gross income, but the itemised transaction history is needed for bookkeeping purposes to reconcile to bank receipts.
Negative Gearing and the Deductibility of Losses
If the property's deductible expenses exceed the rental income in a year, the loss is generally deductible against the host's other income (salary, business income). This is negative gearing — the same mechanism that applies to long-term rentals.
For short-term rental properties that are GST-registered, the deductible expenses are the GST-exclusive amounts (since the host claims the GST credits separately through the BAS). For unregistered hosts, the deductible amount is the GST-inclusive cost.
The deductibility of the loss is not available if the property is not genuinely available for rent — that is, if it is held for private enjoyment and only incidentally offered for letting. The ATO's position in LCR 2021/2 is that properties made available only at times when demand is low or at above-market rates are not genuinely available for rent, and losses may be denied under section 8-1 of the ITAA 1997.
Capital Gains Tax: The Main Residence Exemption Problem
This is the most significant long-term tax consequence for owner-occupiers who short-term rent their home or part of it. Under section 118-190 of the ITAA 1997, if you use your main residence to produce assessable income (including rental income), the main residence CGT exemption is partially denied.
The denial is proportional: if the property was rented for 30% of the ownership period (by floor area and time), then 30% of the capital gain on disposal is taxable. This exposure is permanent — you cannot cure it by moving back into the property and no longer letting it.
For homes let through Airbnb while the owner is travelling, the six-year absence rule provides some relief: a former main residence can be treated as the main residence for up to six years after the owner vacates, but only if it is not rented while the owner treats it as their main residence for the exemption. Renting under Airbnb — even for a portion of the year — can breach the conditions of the six-year rule.
Advise Airbnb-hosting clients to discuss the CGT implications with their tax agent before they start hosting, not after they have accumulated several years of letting history.
The Journal Structure for a Short-Term Rental
For a GST-registered host:
- Revenue: Accommodation income (ex-GST)
- GST liability: 1/11th of gross accommodation fees
- Expenses: Cleaning, linen, maintenance, rates, insurance, depreciation on furnishings, platform fees — all recorded ex-GST with ITC claimed on the BAS
- Apportionment: Private-use portion of mixed costs removed from deductible expenses each period
For an unregistered host below the GST threshold, the journal is simpler: gross rental income, and deductible expenses at their GST-inclusive amounts.