Finance & Tax

How Interest Rates Affect Property Investment in Australia

3 September 2026 1 min read Updated 5 September 2026
RBA interest rate property investment impact

Interest rates are the single most influential external factor in Australian property investment. A 0.25% rate rise on a $600,000 interest-only investment loan adds $125/month to repayments. Across a portfolio of three properties, a 1% rise can add $18,000/year in holding costs.

Monthly Repayment Change per 0.25% Rate Move (IO)
$400K loan+$83/month
$600K loan+$125/month
$800K loan+$167/month
3×$600K portfolio (+1%)+$1,500/month

One Property at a time
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BrickByBrick

Property Investor & Writer — BrickByBrick

Independent property investor writing about what actually works — and what doesn't — in the Australian market. No commissions, no conflicts.

General Advice Warning: This article is general in nature and does not constitute personal financial advice. Please consult a licensed financial adviser before making investment decisions.

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