Adapted from an article by OpenCorp CEO Matt Lewison, published in Yahoo Finance Australia on 28 August 2026.
Property tax policy can change quickly. Housing supply cannot. That timing gap could leave renters carrying the consequences long after the initial headlines have passed.
Australia’s latest property tax changes have reignited debate about investors, home buyers and housing affordability. But one group may not feel the full effect immediately: renters.
In commentary published by Yahoo Finance Australia, OpenCorp CEO Matthew Lewison argues that the most important issue is not whether a tax change causes rents to rise overnight. It is whether the policy environment supports enough new homes and rental properties being added over time.
If rental demand continues to grow faster than supply, competition for available homes intensifies. In a market that is already undersupplied, that creates a clear risk for tenants.
Australia’s rental market is already under pressure
The starting point matters. According to figures cited in Lewison’s commentary, national rents increased by 6% over the previous year, while the national vacancy rate was just 1.3%. Five of Australia’s eight capital cities had vacancy rates below 1%, and some markets recorded rental growth of up to 11% over 12 months.
The number of available rental properties has also fallen sharply. Between 2014 and 2022, there were generally more than 60,000 rentals available at a given time. Over the past four years, that range has reportedly dropped to roughly 30,000 to 40,000, despite Australia’s population increasing by more than four million people since 2014.
These conditions mean the market has limited room to absorb another slowdown in rental supply. When vacancy rates are already tight, even a modest gap between new demand and dwelling completions can increase pressure on renters.
What is changing from July 2027?
Negative gearing will be limited to new residential builds from July 2027. The existing 50% capital gains tax discount will also be replaced for most assets by inflation-based indexation and a minimum tax rate. New residential builds will retain negative gearing and the existing capital gains tax treatment.
Directing investment towards new housing may appear sensible during a shortage. However, the policy does not guarantee that every investor who would have purchased an established property will move into a new build. Some may delay their decision or leave the market altogether.
Housing finance commitments have already shown signs of caution. Australian Bureau of Statistics figures cited in the article indicate commitments fell 5.4% in the June quarter for both investors and owner-occupiers.
Why the real impact may come later
Housing construction has a long lead time. Many homes completed over the next year were financed, sold and commenced before the policy changes were introduced. That means the short-term effect can look relatively small even if fewer projects are beginning now.
The greater risk emerges when the current pipeline runs through. Fewer projects starting today can mean fewer homes completing next year, and potentially fewer investor-owned properties entering the rental pool.
Lewison also points to the difficulty of rebuilding construction capacity once it contracts. When activity slows, tradespeople move to other work, businesses reduce their workforces and development pipelines shrink. Restoring that capacity can take two or three years.
This is why comparisons between the government’s estimate of an approximately $2-per-week rental impact and a NAB scenario suggesting rents in Sydney and Melbourne could rise by as much as 30% over two years need context. These are different models, not certainties. The eventual outcome will depend on how investment, construction, population growth and rental demand interact.
Supply and demand will determine what renters pay
Tax policy is only one part of the housing equation. Construction costs, land availability, labour, population growth, finance conditions and planning all influence whether enough homes are delivered.
The experience of Western Australia and Queensland shows what can happen when housing demand recovers faster than construction capacity. Tight vacancy rates can persist, tenant competition can intensify and rents can record extended periods of double-digit growth.
Sydney and Melbourne may not follow exactly the same path. Nevertheless, the underlying mechanism remains straightforward: if rental demand grows faster than the supply of available homes, vacancy rates tighten and rents face upward pressure.
What this means for property investors
For investors, periods of policy change can create understandable uncertainty. Premium established markets may experience softer prices while buyers wait for clarity, although investors have historically represented a smaller share of demand in many of those locations.
At the more affordable end of the market, the cost of producing new housing remains significant. As land, labour and construction become more expensive, the replacement cost of a new property can also support demand and pricing for comparable established homes.
This makes careful property selection more important. Investors should look beyond short-term sentiment and consider long-term fundamentals, including population trends, local rental demand, vacancy rates, supply pipelines, construction feasibility and affordability.
The question Australia still needs to answer
The central question is not simply whether the tax changes are fair or efficient. It is whether Australia can build enough homes and add enough rental properties to keep pace with demand.
If the answer is no, the sequence is predictable: vacancy rates tighten, competition increases and rents rise. The effect may not be immediate, but renters are likely to feel it first.
