Why new builds unlock bigger tax deductions

Two rental properties can look almost identical on paper — same suburb, same rent, same price — and still produce very different tax outcomes. More often than not, the difference comes down to one thing: depreciation. It's the least glamorous part of property investing and one of the most valuable, and it's the single biggest reason a new build tends to be more tax-effective than an established home.

Two kinds of depreciation

The tax rules let you claim the gradual wear-and-tear on an income-producing building in two separate buckets. Division 43 (capital works) covers the structure itself — the bricks, concrete, roofing and permanently fixed items. For residential buildings constructed after 15 September 1987, it's generally deductible at 2.5% a year over 40 years. Division 40 (plant and equipment) covers the removable, mechanical assets — the oven, dishwasher, carpets, blinds, air-conditioning and hot water system. These are written off over their individual effective lives, and because many are short-lived, the deductions are front-loaded into the early years when your cash flow needs them most.

The 2017 rule that changed the game

Here's the pivot point. Since 9 May 2017, investors who buy a second-hand residential property can no longer claim Division 40 depreciation on the previously-used plant and equipment that comes with it. You still get the Division 43 capital-works deductions on the structure, but the write-offs on the existing oven, carpets and air-conditioner are gone.

The exception — and it's a big one — is new (or substantially renovated) property. When you're the first investor to own a brand-new home, every one of those plant-and-equipment assets is new, so you can claim the full Division 40 deductions on top of the capital works. That single rule is why the numbers diverge so sharply between new and established.

What that looks like in practice

A brand-new investment property hands you both Division 43 and Division 40 — and the plant-and-equipment portion is largest in the first few years. A comparable established home usually gives you the capital-works claim only. As an illustration, a new build might generate first-year depreciation in the order of $12,000–$15,000, where a similar established property might produce a fraction of that. The exact figures depend entirely on the building, so the number that matters is the one on a quantity surveyor's schedule prepared for your specific property — not a rule of thumb.

Why a non-cash deduction is so useful

Depreciation is a non-cash deduction — you're not writing a cheque to claim it. It reduces your taxable income, which lifts your after-tax cash flow, and that extra cash flow is exactly what a disciplined plan puts to work. Redirected against the non-deductible loan on your own home, those tax savings can shorten your mortgage by years. That's the connection we care about most: depreciation isn't about a bigger refund for its own sake, it's fuel for paying down debt faster and freeing up your future.

And now the Budget stacks on top

The 2026–27 Federal Budget added a second reason new builds stand out. From 1 July 2027, negative gearing on established homes is being wound back and the 50% CGT discount is changing — but new builds are exempt, keeping negative gearing and a choice of CGT method. So a new build no longer just offers the bigger depreciation deductions; it also holds onto the tax advantages that established properties are losing. The benefits compound.

Do it properly

Two steps make the difference. First, have a qualified quantity surveyor prepare a depreciation schedule — its cost is itself deductible and it typically pays for itself many times over. Second, make sure the property was the right choice in the first place. A generous depreciation schedule on a poorly-chosen property is still a poorly-chosen property. That's where getting the structure right up front earns its keep.

This article is general information only and doesn't take your personal circumstances into account. Depreciation outcomes vary by property; example figures are illustrative. Please seek advice from a registered tax agent and a quantity surveyor before acting.