According to realestate.com.au, exclusive new research has identified interest rate rises and tax changes as the two primary forces landlords are citing to justify rent increases across Australia — a finding that adds important landlord-side context to ongoing debates about rental costs in 2026.
What Landlords Are Actually Saying
The realestate.com.au research is significant because it provides direct insight into landlord decision-making rather than relying on downstream rental data alone. Landlords pointed to two key culprits: the accumulated effect of interest rate rises pushing up holding costs on investment mortgages, and tax changes eroding the returns they had previously relied upon. Together, these two factors are compressing investment property cash flows at both ends — higher debt servicing on one side, reduced tax advantages on the other.
This dual-pressure dynamic matters because it shifts the policy conversation. For years, rent growth was attributed primarily to supply shortages and population growth. This research suggests that even where supply exists, the after-tax, after-interest economics of holding residential investment property are deteriorating — and landlords are passing those costs on. When holding costs rise faster than income, property investors face a straightforward choice: raise rents, sell, or accept negative returns. The research indicates many are choosing the first option before considering the latter two.
For tenants, the practical implication is that rent relief will not come automatically from rate cuts or tax stabilisation alone. If landlords have structurally repriced their rent expectations upward to compensate for years of compressed returns, rents may remain elevated even as conditions ease.
The Tax Change Effect on Rental Supply and Pricing
Tax changes affecting residential property investment operate through several channels, each of which influences rent levels differently. Changes to negative gearing rules alter the deductibility of investment losses against other income, directly affecting after-tax returns. Capital gains tax settings affect the attractiveness of long-term holding versus selling. When these settings shift unfavourably, the rational investor response is either to reprice rents upward or exit the market — both of which tighten supply and push rents higher.
When interest rate rises and adverse tax changes coincide, investment property economics compress from both ends simultaneously — and the rental market absorbs the impact through higher rents, lower supply, or both. The research from realestate.com.au confirms this is precisely what Australian landlords are citing as drivers of their decisions.
The tax dimension is especially important because it operates independently of monetary policy. The RBA can cut the cash rate, easing the interest cost burden on investors — but it cannot reverse tax settings at the federal or state level. If tax changes have permanently repriced the economics of residential property investment, some portion of the current rent elevation is structural rather than cyclical. That means the rental market will not fully normalise even when interest rates eventually decline. For a deeper breakdown of how these tax settings interact, see our Australian Property Tax Guide — What Every Investor Needs to Know.
For investors currently holding residential property, the research is a prompt to stress-test their after-tax position under multiple scenarios. A property that was positively geared at a lower interest rate may now be running at a loss — not because rents have fallen, but because costs have risen on two fronts at once. Investors who have not reviewed their depreciation schedules, deductible expense claims, or loan structures recently may be paying more tax than necessary. See our guide to Property Depreciation Schedules Explained for strategies to maximise legitimate deductions.
Background: How Tax and Rate Cycles Shape Australian Rents
Australia's residential rental market is almost entirely privately owned — unlike many European countries with significant social housing stock. This means that the economics of private landlords directly determine rental supply and pricing in ways that do not apply in markets with larger public housing sectors. When policy settings make private residential investment less attractive, the impact flows into rental availability and pricing, with limited public housing capacity to absorb the displaced demand. Understanding this structural reality is essential context for interpreting the realestate.com.au findings.
Investors considering diversification away from residential property into commercial assets — where lease structures, depreciation rules, and tax treatment differ meaningfully — can find a comparative framework in our Commercial Property Investment in Australia — A Beginner's Guide. Commercial property carries its own risk profile, including longer vacancy periods and different financing conditions, but its tax treatment and yield dynamics respond differently to the pressures currently squeezing residential landlords. For those monitoring macro capital flows and how tax and super planning intersects with property investment decisions, the current environment is particularly complex.
Practical Implications for Investors, Landlords, and Tenants
For landlords, the realestate.com.au research validates what many have already felt in their monthly cash flow statements: holding residential investment property in Australia in 2026 is more expensive than it has been for much of the past decade, and tax changes have compounded interest rate pressure rather than offset it. The immediate priority is a thorough review of deductible expenses — interest, depreciation, property management fees, maintenance, and insurance — to ensure the tax position is optimised under current rules. An investment property that appears marginally viable before depreciation claims may perform substantially better once a current-year depreciation schedule is applied.
For prospective investors considering entering the residential market, the research is a caution against assuming that rents will automatically compensate for high acquisition costs and elevated interest rates. If existing landlords are raising rents in response to cost pressure, new entrants face the same dynamics — but without the benefit of lower historical purchase
This article was produced with AI assistance and reviewed for accuracy. Content is for informational purposes only and does not constitute financial or property investment advice.
