Labor Tax Changes Could Push Australian Rents Up 15–30%

With vacancy rates at just 1.3%, Labor’s negative gearing changes could push rents up by 15–30%, according to leading market analysts.

If you are currently renting or planning to buy your first home, the federal government's changes to negative gearing and capital gains tax have consequences that stretch well beyond the property listings page. Property Update has published a detailed analysis of the potential rental market fallout — and the numbers are confronting for anyone who does not yet own a home.

Australia's rental market was already under significant pressure before the federal budget. According to SQM Research, the national residential vacancy rate was just 1.3% in July 2026, with only 40,771 rental properties sitting vacant across the entire country. A balanced rental market typically requires a vacancy rate between 2.5% and 3%. National advertised rents were already 7.2% higher than a year earlier, with the combined national average approaching $700 a week.

Into this environment, Labor has introduced changes to negative gearing and capital gains tax for residential property investors, along with adjustments to borrowing rules for investment properties held inside self-managed superannuation funds. The policy intent is to redirect investor capital away from established homes and toward new residential construction. The practical consequences, many analysts argue, could fall hardest on renters.

Why Rents May Rise Significantly

The economic mechanism is not complicated. When an investor purchases an established property that runs at a rental loss, the current rules allow them to offset that loss against their salary income today. Under the new arrangements, the loss must instead be carried forward to offset future investment income or capital gains.

Treasury itself has modelled the impact. In their example, an investor earning $80,000 who owns a property with a rental shortfall of $14,810 a year would currently receive a tax benefit of $4,761 per year. An investor earning $210,000 would save $6,961. Under the new rules, that immediate cash-flow benefit disappears, creating a real gap in after-tax returns.

National Australia Bank's head of Australian economics, Gareth Spence, estimates that gross rental yields may need to rise by approximately one percentage point to compensate investors for the lost tax benefits. For Sydney and Melbourne investment properties currently generating gross yields of around 3.5%, reaching 4.5% would require rents to increase by roughly 25 to 30% if property values remained unchanged.

SQM Research managing director Louis Christopher has suggested a yield increase of between one and 1.5 percentage points may be required in tighter markets. He believes some of the adjustment will occur through softer property prices rather than pure rent increases, which could still imply rental growth of around 15%. Ray White, which manages over 250,000 rental properties nationally, has also flagged that rents could spike by up to 30% as a result of the budget changes.

It is worth noting that Treasury estimates the reforms will produce around 75,000 additional owner-occupiers over a decade and cause property prices to grow about 2% less over a couple of years than they otherwise would. However, most market analysts believe the rental impact will be larger than Treasury's own modelling suggests, particularly given current vacancy levels.

The Inflation Feedback Loop Borrowers Need to Understand

Here is where this issue becomes directly relevant to anyone with a mortgage or hoping to obtain one: rising rents feed directly into inflation, which in turn affects interest rate settings.

ABS figures show that headline inflation was 3.8% in the year to June 2026, with trimmed mean inflation at 3.6%. Housing costs were already the single largest contributor to inflation over that period, rising 6.8% and adding approximately 1.5 percentage points to the annual inflation figure.

If rents rise further as a consequence of investors exiting the established property market, housing inflation will increase. Because rental leases expire at different times and state tenancy laws restrict how often rents can be raised, the effect feeds into the Consumer Price Index gradually — but it is real and cumulative. If elevated rent inflation keeps overall consumer prices sticky, the Reserve Bank may face pressure to maintain higher interest rates for longer than would otherwise be necessary.

For borrowers on variable rate home loans or approaching a fixed-rate expiry, that is a meaningful consideration. Even a modest extension to the period before rate cuts arrive has a material impact on monthly repayments.

What This Means for Borrowers and Investors Right Now

For existing investors, the most immediate question is how the changes affect your current cash flow and your long-term strategy. The new rules apply to investments in established properties entered into after the policy change date, so existing arrangements are generally grandfathered — but if you are planning to purchase an additional investment property, the after-tax return needs to be modelled under the new rules before you commit.

If you are a renter who is thinking about buying, the irony of the current environment is that softer investor demand could ease property prices modestly in some markets. Treasury projects property prices growing about 2% less over a couple of years than they otherwise would. A 15% rent increase on a $700 weekly rent would cost a tenant an extra $5,460 a year — reason enough to look seriously at whether buying makes sense for your situation.

To understand what you could borrow and what your repayments might look like, use our borrowing power calculator. And if you are an existing homeowner or investor wondering whether your current loan remains competitive, our refinance savings calculator can give you a quick read on whether switching makes financial sense.

For investors exploring whether the numbers still stack up under the new policy settings, see our investor home loans guide for context on what lenders are currently offering for investment purposes.

Property Update has detailed analysis of the economic modelling behind the rent forecasts.