The new-build tax carve-out is quietly rewriting investor strategy

Property investors have spent decades treating new builds as the asset class you buy when you don’t know better. The proposed negative gearing reforms may be about to make that snobbery expensive.

Under changes flagged in the Federal Budget, negative gearing deductions against personal income would be quarantined to new dwellings, with established property purchased after 1 July 2027 excluded. Annual losses on established stock would instead accrue against future property gains, including capital gains on exit.

The headline debate has focused on house prices. The more consequential shift is happening inside investor borrowing capacity.

Why Borrowing Capacity Could Become the Real Story

Phillip Almeida, director and co-founder of property advisory firm Performance Property and its specialist medical arm Property for Doctors, estimates borrowing capacity on established property could fall by as much as 20 per cent once lenders stop crediting negative gearing benefits in serviceability assessments — the difference, in practical terms, between a $700,000 acquisition and a $560,000 one.

“The question investors should be asking isn’t whether established property outperforms new builds — it does, and our own research says so,” Almeida says. “The question is what happens to your strategy when you can no longer afford to keep buying it.”

The Trade-Off Between Growth and Cash Flow

Research from the Performance Property Research Division, across long-term market cycles, puts the growth penalty on new builds at 2 to 3 per cent per annum against established property in the same market — a gap driven by the supply injection that new estates create. Over a typical hold, that pushes the required timeframe from six-to-nine years for established stock to eight-to-eleven for new.

That is not a small concession. Compounded over a decade, 2 to 3 per cent per annum is real money.

But the counterweight is cash flow. New dwellings attract substantially higher depreciation deductions on both structure and fittings, valued at today’s elevated construction costs. Combined with the retained negative gearing treatment, the Research Division’s modelling suggests a new build held at long-term average interest rates sits close to cash flow neutral — a very different proposition from the holding costs of established property, particularly for investors already carrying two or three assets.

Why High-Income Professionals May Be Most Affected

The result is a strategy inversion few predicted. High-income professionals — the cohort most exposed to the serviceability squeeze and best placed to use depreciation — may find new builds shift from portfolio afterthought to structural necessity.

Almeida, whose firm has advised medical professionals and HNW’s nationally since 2013, says doctors sit at the centre of this shift.

“Our clients are typically high-income, time-poor, and building portfolios across a 20-year career. Cash flow is the constraint that stalls them — not appetite, not income. A well-selected new build keeps them accumulating when an established-only strategy would force them to stop.”

Selection Will Determine Success

The caveat, and it is a large one, is selection. New build corridors live and die on underlying demand. The Research Division’s data shows development suburbs in Queensland, South Australia and New South Wales matching or exceeding their nearest capital city across recent growth cycles — but Almeida is candid that this holds only where vacancy rates, population inflow and affordability support the broader market. Buy into a corridor without those fundamentals and no depreciation schedule will save you.

A Portfolio Doesn’t Have to Choose Sides

His framing is that the established-versus-new argument was always the wrong fight.

“Most portfolios will end up holding both. Established property for the long-term compounding. New builds to stay in the market when cash flow would otherwise force you to stop. The order matters more than the ideology.”

The Window Before July 2027

If the reforms pass in their current form, the two-year runway to July 2027 becomes its own market event a window in which established property retains its full tax treatment for new buyers. How investors behave inside that window may tell us more about the policy’s real effect than anything modelled so far.