Rising Interest Rates and the
Rentvesting Advantage

On March 17, the Reserve Bank of Australia raised the official cash rate to 4.1% — the twelfth increase since May 2022. Analysts at both Westpac and Commonwealth Bank are now forecasting rates could reach as high as 4.85% by late 2026, as the RBA continues its battle to bring inflation back within the 2–3% target band.

For most Australians with a mortgage, this news lands hard. Every 25 basis point rise adds roughly $80 per month to a $500,000 loan. For owner-occupiers, that cost is unavoidable and comes with no tax relief. But for rentvestors — those renting where they live while owning an investment property elsewhere — the same rate environment tells a fundamentally different story.

The Tax Asymmetry Nobody Talks About

Here is the fundamental difference between owning an investment property and owning the home you live in: investment loan interest is fully tax-deductible. Owner-occupier interest is not.

This distinction, which is often overlooked in the rate-rise conversation, becomes dramatically more valuable as rates climb. At 4.1%, a rentvestor with a $600,000 investment loan is paying roughly $24,600 per year in interest. Depending on their income bracket, that translates to a tax saving of between $7,900 and $11,070 per year — money that simply does not exist for the person who bought in their preferred suburb and lives there.

Negative gearing — where your interest costs and expenses exceed your rental income — effectively shares a portion of your holding costs with the ATO. In a rising rate environment, this sharing mechanism becomes more generous, not less. For a rentvestor in the 37% or 45% tax bracket, more than a third of every additional dollar of interest is effectively subsidised.

What the Numbers Actually Look Like

Consider a typical rentvesting scenario in the current environment:

• You rent a two-bedroom apartment in inner Melbourne for $2,400 per month
• You own a 3-bedroom house in regional Queensland purchased for $520,000
• Your investment loan at current variable rates: approximately 6.4%
• Monthly interest cost: ~$2,773
• Rental income from your property: $2,100 per month
• Monthly shortfall: ~$673 before tax

That $673 shortfall sounds uncomfortable — but after applying negative gearing at a 37% marginal tax rate, the real after-tax cost drops to approximately $424 per month. Spread across the week, that is $98 for a week — and it is buying you equity in a market that has historically delivered 6–8% annual capital growth.

The Rental Market: Tight and Getting Tighter

While rates have risen sharply, the rental market has moved in the opposite direction to what many expected. Vacancy rates nationally sit at approximately 1.0–1.2% — a level that would have been considered extraordinary just five years ago. A balanced rental market sits between 4% and 5% vacancy. We are operating at roughly one quarter of that.

The mechanics here favour the rentvestor directly. Tight vacancy means:

• Lower risk of prolonged vacancy — the periods between tenants are shorter
• Sustained upward pressure on asking rents — improving your rental yield over time
• Stronger negotiating position as a landlord at lease renewal
• Rising gross rental yields, which partially offset higher mortgage costs

In several high-performing rentvesting markets — regional Queensland, outer Perth, and parts of South Australia — gross rental yields have climbed above 6%. At that yield level on a $500,000 property, the rental income nearly covers the full interest cost at current rates, before any tax deductions are applied.

What Rising Rates Mean for Property Prices — and Your Entry Point

Rate rises do dampen buyer sentiment, particularly among owner-occupiers who are borrowing to the maximum of their capacity. This has created a window that many experienced investors are using deliberately: softer competition from first-home buyers, more negotiating room, and in some markets, meaningful price corrections from 2021–2022 peaks.

For a rentvestor focused on a regional or outer-metro market, this is precisely the environment where disciplined buying can establish a cost base that looks very attractive in three to five years — when rates normalise and competition for the same properties returns.

The Bottom Line

Rising interest rates are not the headwind for rentvestors that they are for owner-occupiers. The tax deductibility of investment loan interest, the resilience of the rental market, and the opportunity presented by reduced competition from owner-occupier buyers combine to make the current environment genuinely compelling for those positioned — or positioning themselves — to rentvest.

The strategy does not eliminate risk, and it requires careful cash flow management. But the structural advantages that make rentvesting attractive are, if anything, more pronounced today than they were when rates were at historic lows.