If you've been on any building and construction industry forums lately, you've probably seen Capital Gains Tax (CGT) come up more than a few times. And for good reason — the Federal Government is looking at making some of the most significant changes to CGT in over 25 years, and those changes have direct implications for anyone buying, building, or selling residential property in NSW.

So first, let's make sure we're all on the same page about what CGT actually is.

CGT is a tax on the profit — or 'capital gain' — you make when you sell an asset. For most residential investors and developers, that means the profit on a property sale. It's not a separate tax; it forms part of your assessable income and gets taxed at your marginal tax rate.

Here's the key bit that's been around since 1999: if you hold a property for more than 12 months before selling, you currently get a 50% discount on that capital gain. So if you buy a block, build a duplex, and sell it two years later making a $400,000 profit, only $200,000 of that gain gets added to your taxable income. That's the CGT discount — and it's the bit the government is now looking at changing.

As of May 2026, no final legislation has been passed — but the Federal Budget on 12 May is expected to lock in some form of CGT reform. Here's what's being floated:

Option A — Halving the Discount (50% down to 25%)

The most commonly discussed proposal is reducing the CGT discount from 50% down to 25% for investment properties beyond an investor's first property. The Parliamentary Budget Office has costed this scenario and it has strong political support. Properties acquired before the proposed cut-off date (expected around 1 July 2026) would likely be grandfathered — meaning existing holdings keep the old rules.

Option B — Full Removal for Multiple Investment Properties

A more aggressive scenario would remove the CGT discount entirely for second and subsequent investment properties acquired after the start date. Under this model, investors selling properties would be taxed on the full capital gain, not a discounted version of it.

Option C — Return to Indexation (Replacing the Discount)

Some economists and budget watchers are predicting a return to the pre-1999 indexation model, where the purchase price of an asset is adjusted for inflation before calculating the capital gain. This is arguably fairer over the long term in high-inflation environments but can be more complex to administer and can be more punishing for shorter-term holds.

Negative Gearing — Coming Along for the Ride

CGT reform is being discussed in tandem with negative gearing changes. Under proposals being floated, negative gearing — the ability to offset rental losses against other income — could be restricted to newly built properties only, or abolished altogether for existing investment properties acquired after a cut-off date. For builders and developers, the 'new builds only' carve-out is actually significant — more on that below.

This is where it gets real for builders, developers, and construction professionals across NSW. The CGT discount has been quietly underpinning residential construction activity for over two decades. When investors buy residential property — and particularly when they fund new builds — they're factoring the CGT discount into their investment decision. Pull that out of the equation and the maths changes significantly.

3.1 Investor-Funded New Builds

Investors fund roughly 40% of all new residential construction in Australia. In NSW, where land and construction costs are among the highest in the country, that investor participation is even more critical. If the return on a new build drops because the CGT discount is reduced or removed, some investors will walk away from development projects entirely.

Industry modelling released by the Housing Industry Association (HIA), Master Builders Australia, and the Property Council in March 2026 found that a reduction of the CGT discount to 25% could reduce new dwelling starts by over 12,000 nationally in the period to 2029. More severe reform scenarios showed reductions of up to 45,000 new dwelling starts — a massive hit to supply at exactly the time NSW is trying to build more homes.

3.2 The 'New Builds Only' Carve-Out — A Potential Silver Lining

If the government goes down the path of restricting negative gearing to newly constructed properties only, this could actually create a short-term competitive advantage for builders. Investors would be steered toward buying off-the-plan or commissioning new builds rather than purchasing existing stock, because new builds would retain the negative gearing benefit. Some market watchers are already suggesting this could boost demand for house-and-land packages and new unit developments in Western Sydney and the broader NSW growth corridors.

3.3 Owner-Builder and Small Developer Projects

For owner-builders — like someone developing a duplex to live in one and rent out the other — the main CGT exemption (the principal place of residence exemption) remains intact. Your home is still exempt. But if you're doing a development with the intent to sell, CGT implications kick in regardless. And for small developers running projects through a company structure, the company tax rate applies (30%), and companies don't get the individual CGT discount anyway, so these changes matter less at the company level — though they may affect the appetite of the individual investors you're selling completed dwellings to.

3.4 Land and Construction Cost Sensitivity

NSW has some of the highest land values in the country. A CGT change that reduces after-tax returns will be felt more sharply here than in lower-cost states. An investor in regional Queensland might absorb a smaller CGT discount and still see viable returns. In Sydney's Inner West, Northern Beaches, or South-West growth precincts, where land acquisition costs are enormous, the math gets tighter very quickly. Feasibility studies on knock-down-rebuild projects and small lot developments will need to be revisited.

The major construction and property industry associations have come out swinging against the proposed changes. In a joint statement released in March 2026, the HIA, Master Builders Australia, the Property Council, and the Real Estate Institute of Australia warned that any reduction in the CGT discount or negative gearing entitlements will reduce new housing supply — the opposite of what Australia needs right now.

Their argument is straightforward: investors finance up to two in every five new homes built across Australia. They're not just passive speculators — they're the demand signal that makes new residential construction commercially viable. Reduce their after-tax returns and you reduce their appetite to fund new builds.

On the other side, economists from the Grattan Institute have argued the impact on new construction would be relatively modest — estimating that halving the discount to 25% would reduce new home builds by around 10,000 over five years nationally. The Senate Select Committee on the CGT Discount's final report, handed down in March 2026, found the current discount structure was skewing housing ownership toward investors and contributing to affordability pressures.

NSW Treasury has gone even further, backing reform as a fiscal and equity measure, noting that NSW taxpayers alone account for around 38% of Australia's net capital gains — and that the benefits of the discount are heavily concentrated among higher-income households.

You don't need to panic — but you do need to be across this. Here's a practical take on what to be thinking about heading into and beyond the May 2026 Budget:

Talk to Your Accountant Before Budget Night

If you've got properties or development projects in the pipeline, get a conversation going with your accountant or tax agent before 12 May. Understand how your current holdings are structured, whether you're using a trust, company, or personal name, and what the impact of different scenarios might look like on any planned disposals.

Review Your Project Feasibility Numbers

If you're a developer currently marketing off-the-plan stock or relying on investor buyers to hit presale targets, run your numbers under a reduced or removed CGT discount scenario. If the deal only stacks up with the full 50% discount in place, you need to know that now — not after Budget night.

Consider the New Build Advantage

If negative gearing ends up being restricted to new builds only, your product — particularly house and land packages, duplexes, and new unit developments — could become relatively more attractive to investors. This is worth exploring in your sales and marketing positioning.

Stay Across Grandfathering Provisions

Based on all credible commentary, properties already held before the cut-off date are very likely to be grandfathered — meaning the old rules apply for the life of that asset. If you're considering acquiring an investment property, the timing of that acquisition relative to the reform start date matters. Again — get proper advice.

Keep an Eye on Construction Demand

In the short term, there may be a rush to lock in purchases before any reform kicks in. Builders and contractors could see a short burst of activity as investors try to get properties under contract ahead of the change. Medium to long term, if investor participation drops, it could mean fewer spec builds, fewer investor-driven renovation projects, and a quieter residential market.

Here's the thing that often gets lost in the political back-and-forth: NSW is in the middle of a housing supply crisis. The NSW Government has committed to ambitious housing targets under the National Housing Accord. The construction industry is already stretched — labour shortages, rising material costs, tight margins, and an increase in insolvencies have all hit the sector hard over the last few years.

Any policy change that reduces investor participation in new residential construction — even modestly — runs the risk of making an already difficult situation harder. Industry groups and the government will need to carefully balance the revenue and equity arguments for CGT reform with the very real risk of choking off the new housing supply pipeline that NSW desperately needs.

The CPD Centre's view is simple: regardless of which way the legislation lands, NSW builders and construction professionals need to be informed, adaptable, and financially literate. That's what professional development in this industry is all about.

As a licensed builder or construction professional in NSW, staying across changes to the property investment and tax landscape isn't just good business — it can be directly relevant to your CPD obligations. Understanding the financial environment your clients and project stakeholders are operating in makes you a better, more commercially aware professional.

At CPD Centre Australia, we deliver practical, industry-relevant CPD content for NSW builders, developers, and construction professionals. Our courses cover compliance, contracts, commercial awareness, and the kind of real-world knowledge that actually helps you run better projects.