When rent stops during a vacancy, many costs do not. Loan payments, service charges, insurance and necessary upkeep may continue while the property is empty. A useful vacancy plan starts with those continuing obligations rather than a generic percentage of annual rent.
The question is how much cash the property and owner need before the next tenant's payment actually arrives.
Build a dated vacancy scenario
Suppose continuing cash costs are 1,100 a month. A two-month vacancy would require 2,200. Expected preparation work adds 900, bringing the illustrative requirement to 3,100.
If 1,800 is already reserved, the gap is 1,300. The example is not a forecast of your property's vacancy or repair costs. It shows how to connect assumptions to a funding need.
Use actual contracts, loan statements and quotations wherever possible. Label uncertain work and timing clearly.
Keep financing and operating meanings intact
The full loan payment belongs in the cash requirement, but principal and interest still serve different purposes in financial analysis.
Likewise, a refundable deposit paid for a service or a capital purchase may not be the same as an operating expense. The vacancy scenario needs the cash timing even when the eventual classification requires further review.
Do not force every outflow into maintenance simply because the property is empty.
Test a longer gap
Move the expected first rent receipt back by another month. Add the continuing costs for that period and check whether any additional preparation or carrying costs arise.
A signed agreement and an actual payment are different stages. Use the contractual terms and realistic settlement dates rather than assuming the property is funded as soon as a tenant is found.
ASIC MoneySmart identifies vacancy and property costs as relevant investment risks. The practical response is to test the cash implications before a gap occurs. ASIC MoneySmart
Separate the property's reserve from household cash
A consolidated total may include personal savings that are already committed to other obligations. Do not assume all visible cash is available for the rental.
If the owner contributes money, record the movement according to the entity arrangement. It is not rent and should not improve the property's operating-income figure.
After the vacancy ends, reconcile actual costs against the scenario. Note which assumptions were too low, too high or simply mistimed. Use the evidence to update the next reserve plan rather than keeping an arbitrary target forever.
A vacancy reserve is not a guarantee against every outcome. It is a deliberate provision based on the costs that would continue and the uncertainty you have chosen to test.