Owners’ Equivalent Rent (OER) Explained: 2025 Guide for Australians

Australians are no strangers to property talk—whether it’s house prices, rental yields, or the ever-present spectre of inflation. But one term that’s often buried deep in economic reports is Owners’ Equivalent Rent (OER). In 2025, as the Reserve Bank of Australia (RBA) and the Australian Bureau of Statistics (ABS) refine their inflation measurement toolkit, understanding OER is more important than ever for both homeowners and investors.

What is Owners’ Equivalent Rent?

Owners’ Equivalent Rent is an estimate of how much a homeowner would pay to rent their own home. It’s a way of capturing the value of housing services consumed by owner-occupiers, and it’s a major input in Australia’s Consumer Price Index (CPI). Instead of ignoring homeowners or treating them as investors, OER asks: “If you didn’t own your home, what would you pay to live in it?”

• Used in CPI to reflect real housing costs for the average Australian
• Based on market rents for comparable properties, not actual mortgage payments
• Ensures inflation data isn’t skewed by property ownership rates

How OER Impacts Inflation and Policy in 2025

The way OER is calculated can have a ripple effect across the economy. In 2025, the ABS has updated its CPI methodology to give more weight to OER, reflecting the ongoing rise in home ownership and the surge in property values post-pandemic. This matters for several reasons:

• Inflation Targeting: The RBA uses CPI—including OER—to set interest rates. If OER rises due to higher market rents, the RBA may respond with tighter monetary policy, affecting mortgage rates and loan affordability.
• Property Market Analysis: Investors and analysts look at OER to gauge the real cost of housing, beyond just purchase prices. In 2025, with rental vacancy rates near record lows in Sydney and Melbourne, OER has surged, pushing headline inflation higher.
• Budgeting for Households: Because OER reflects the opportunity cost of living in your own home, it’s a useful benchmark for understanding whether you’d be better off renting or buying—especially as rental yields and mortgage rates fluctuate.

Real-world example: In March 2025, ABS data showed a 6.2% annual increase in OER, largely driven by tight rental markets in major cities. This contributed nearly a full percentage point to the headline CPI, prompting economists to warn of persistent housing-driven inflation.

What Does OER Mean for Homeowners and Investors?

For most Australians, OER is invisible—it’s not a line item on your mortgage statement or a bill you pay. But it’s influencing your financial life in subtle ways:

• Homeowners: Rising OER can make your home look like a better investment compared to renting, especially if your mortgage repayments are steady but market rents are rising quickly.
• Investors: A high OER signals strong rental demand, which can support higher property prices—but it may also mean that yields are tightening as purchase prices outpace rents.
• First Home Buyers: Understanding OER can help you model the true cost of ownership versus renting, factoring in both market trends and your own financial situation.

Example: In Brisbane, where rental vacancies hit just 0.8% in early 2025, OER jumped sharply. Homeowners saw their ‘imputed rent’ rise, boosting their notional wealth on paper but also increasing the inflationary pressure that could push interest rates higher.

Why Should You Care About OER in 2025?

With housing affordability and rental stress dominating headlines, OER is more than an academic metric. It’s central to how policymakers, lenders, and households understand the real cost of living and the dynamics of the property market. Here’s what to watch:

• Policy Moves: If OER continues to rise, expect ongoing debate about interest rate hikes and housing policy interventions.
• Financial Planning: Use OER as a lens for comparing rent and buy scenarios—especially as fixed mortgage rates roll off in 2025 and rental markets remain tight.
• Investment Strategy: Property investors should track OER alongside rental yields and capital growth, as it reflects the real-world market for housing services.