How to prepare a property portfolio for another rate rise
By
Ruba Jaajaa
Fri, Sep 25, 2026
2 min
A property portfolio can look comfortable until several small pressures arrive together: a rate increase, a vacancy, higher insurance and an unexpected repair. The correct time to model that combination is before it occurs.
Start by recalculating every loan at 0.25, 0.50 and one percentage point above its current rate. Include principal-and-interest repayments even where a loan is temporarily interest-only, because the eventual step-up may be larger than the next RBA move.
Then calculate true net rent. Deduct management, council and water charges, strata, insurance, maintenance, land tax where applicable and a vacancy allowance. A property advertised with an attractive gross yield can produce a very different result after these costs.
Third, review the portfolio’s liquidity. An offset account can reduce interest while keeping cash accessible, but investors should obtain tax advice before moving funds between loans. The distinction between investment and private debt affects deductibility, and poorly structured redraws can create lasting complexity.
Fourth, examine refinancing risk rather than just today’s rate. A highly leveraged investor may be unable to refinance on the same terms because the new lender tests total debt at a higher assessment rate. Credit-card limits, owner-occupied debt and shaded rental income can all reduce capacity.
Fifth, rank properties by resilience. Consider net yield, vacancy risk, near-term capital expenditure, tenant demand, debt attached and the cost of selling. This is not an instruction to sell the weakest performer automatically; transaction costs and tax consequences matter. It is a way to identify where pressure would emerge first.
Investors should also review fixed-rate and interest-only expiry dates. A portfolio with several facilities resetting in the same quarter carries concentration risk even when each loan appears manageable individually.
The goal is not to predict the RBA perfectly. It is to ensure that one policy decision does not force a rushed refinancing, sale or reduction in essential maintenance. A portfolio that can absorb higher rates and temporary income interruptions gives its owner time to make deliberate decisions.
Read more: What mortgage holders should do before the next RBA decision
Portfolio checklist
Stress test: Current rate plus 0.25, 0.50 and one percentage point.
Model: Net rent after every recurring cost and vacancy.
Check: Fixed-rate expiries, interest-only expiries and loan maturity.
Preserve: An accessible emergency buffer.
Review: Insurance, land tax, strata works and major maintenance.
Seek advice: Licensed credit, financial and tax advice before restructuring.