How Interest Rates Affect Property Investment
Interest rates are one of the biggest levers affecting whether an investment property is a good deal today versus twelve months ago. Here’s what actually changes when rates move.
The direct effect of interest rates: your repayments
Most investment loans are variable rate, meaning your repayments move when the Reserve Bank of Australia (RBA) changes the cash rate and lenders pass it on. A 0.25% rate rise on a $500,000 investment loan adds roughly $75–$85 a month to repayments (depending on the loan term and current rate) – a 1% rise adds several hundred dollars a month. That directly affects your cash flow, especially if the property is negatively geared and already costing you money to hold.
The indirect effect: what you can borrow
Lenders assess your ability to service a loan using a “buffer” rate – typically your actual rate plus around 3%. When rates rise, that buffer rises too, which can reduce your maximum borrowing power even before your actual repayments change. This is often the first thing investors notice: their pre-approval amount shrinks between property searches, even though nothing in their personal finances changed.
The market effect: property values and rents
- Higher rates tend to cool buyer demand, which can slow or reverse capital growth in some markets – though this varies significantly by location and isn’t universal.
- Rents often rise alongside rates, as landlords pass on higher holding costs and rental demand increases from people delaying home purchases.
- Lower rates tend to do the opposite – increasing borrowing capacity and buyer competition, which can push prices up.
How investors plan around rate movements
- Stress-test your own numbers. Before buying, calculate your cash flow at 2% above the current rate, not just today’s rate – lenders do this, and so should you.
- Consider fixed, variable, or split loans. A fixed rate offers repayment certainty for a set period; variable gives flexibility; a split loan hedges between the two.
- Keep a cash buffer. An offset account or redraw facility gives you a cushion if rates rise faster than expected.
- Focus on the whole return, not just the rate. Rental yield, capital growth potential, and tax benefits all matter alongside financing costs – a slightly higher rate on a well-chosen property can still outperform a lower rate on a weaker one.
Talk to a broker before you assume the worst (or the best)
Interest rate movements affect every investor differently depending on loan structure, equity position, and portfolio size. Book a call and we’ll model what current and likely future rates mean for your specific situation.
Interest rates are one of the biggest levers affecting whether an investment property is a good deal today versus twelve months ago. Here’s what actually changes when rates move.