The 2026 Capital Gains Tax Overhaul: How to Invest Smartly Moving Forward

The 2026–27 Federal Budget didn't only change negative gearing. It also rewrote how capital gains tax (CGT) works for Australian property investors, and for many Melbourne investors, this change could have a big impact over the long term.

This article is general information only and does not constitute financial, legal or tax advice. We recommend seeking advice from a qualified accountant and solicitor before making any decisions.

What is actually changing?

Since 1999, investors have been able to apply a flat 50% discount to capital gains on assets held for more than 12 months. From 1 July 2027, that discount is being replaced with a system based on cost base indexation, adjusted using the consumer price index (CPI), along with a 30% minimum tax rate on real capital gains. These CGT changes mark one of the most significant shifts to property taxation in decades.

In simple terms, instead of automatically halving your taxable gain, the tax office will adjust your cost base for inflation over the time you held the asset. Whatever gain remains after that adjustment is your real gain, and if your marginal tax rate would otherwise mean you pay less than 30% tax on that gain, the minimum tax rate tops it up to 30%.

This applies to CGT assets generally, including property and shares, not just residential investment property.

Is indexation automatically worse?

The instinct is to assume any change away from a 50% discount must be a tax increase. That isn't necessarily true, and the outcome depends heavily on your rate of return.

Treasury's own modelling shows that if indexation had applied over the past 20 years, the effective discount for a house held for five years would have averaged around 42%, and for a house held for ten years, around 36%.

For lower-growth assets, indexation can work out more generously than a flat 50% discount. For higher-growth assets, it can work out less generously. Understanding indexation vs CGT discount outcomes for your specific asset is the first step in any sound property investment strategy.

The takeaway for Melbourne investors is that the impact of this change depends on the specific asset, its growth rate and how long you intend to hold it, not on a blanket assumption that CGT is now higher across the board.

When does this actually apply to you?

Some transitional rules might apply. For assets you already own, there is no change to gains accrued before 1 July 2027. The existing 50% discount continues to apply to the portion of your gain earned up to that date, calculated using either a formal valuation or a formula approved by the Australian Taxation Office (ATO). Only the gains accrued from 1 July 2027 onwards fall under the new indexation and minimum tax rules.

Assets purchased after 1 July 2027 will be treated entirely under the new arrangements from day one.

Your principal place of residence remains exempt from CGT entirely, and the small business CGT concessions are unchanged.

What about new builds?

For Melbourne investors weighing up their next purchase, this could be where the opportunity sits.

Investors who buy an eligible new build get a choice that established property investors don't. At the point of sale, you can apply either the existing 50% CGT discount or the new indexation and 30% minimum tax system, whichever produces the better result for your specific numbers. New build investors also retain full negative gearing, unaffected by the changes applying to established properties. For many, this makes new builds a compelling piece of a broader property investment strategy.

What is the current market telling us?

The Budget's tax settings aren't operating in isolation. Cotality's Home Value Index for June 2026 showed Melbourne dwelling values fell 1.0% over June, taking the median dwelling value to $808,486.

Cotality's research director, Tim Lawless, pointed directly to the Budget as one of the forces behind the slowdown, noting that “a further dampening of demand via property taxation changes announced in the federal budget” is contributing to weaker housing conditions alongside higher rates and stretched affordability.

He was equally direct about where that policy is designed to push investor capital, adding that “the policy aim is to redirect capital toward newly built supply, but the near-term effect is more likely to be weaker demand for established housing.”

Structuring your finance around the changes

For property investment to be successful, tax treatment is only half the equation. How you finance a property, and when, can meaningfully affect your after-tax position over the life of the investment.

For new build and off-the-plan purchases specifically, the loan structure works differently to a standard residential purchase, with construction drawdowns, longer settlement timeframes and often a narrower pool of lenders willing to fund the asset class. Getting finance advice at the contract stage from an experienced brokerage like AXTON Finance gives you time to structure the loan around your broader portfolio strategy rather than reacting to whatever the first lender offers.

The same experience and knowledge will help if you are using an existing property to fund the purchase, rather than a new mortgage. Refinancing an established investment property to release equity has no effect on that property's CGT position, because the entitlement is tied to the property and its ownership, not the loan. That means using equity to help fund a new build purchase is a finance decision, not a tax one. Your mortgage broker can help you structure this properly, rather than defaulting to whatever your current lender offers.

Other benefits of new builds

There is also a state-based saving you should factor into your decision, too. The Victorian government's temporary off-the-plan stamp duty concession applies to contracts signed before 21 April 2027 and calculates duty on the dutiable value of the property rather than the full contract price. This means any construction costs still outstanding when you sign are subtracted before duty is worked out.

Unlike other stamp duty concessions, which are restricted to owner-occupiers and first home buyers under set price thresholds, the temporary off-the-plan concession is open to all buyers, including investors, companies and trusts, with no value threshold. It applies to apartments, units and townhouses in a strata subdivision, though not to house-and-land packages outside a strata scheme.

For an off-the-plan Melbourne apartment, that can mean tens of thousands of dollars less in stamp duty, on top of the tax treatment already explained above.

Where does this leave you?

The 2026 CGT overhaul has shifted the settings for new purchases in favour of a specific kind of investment decision: buying new, holding with intention and structuring your finance properly from the outset.

For established property owners, the transitional rules protect what you've already built. For anyone weighing up their next purchase, the numbers increasingly favour new builds, provided the fundamentals of the asset stack up too. Getting the right advice now, while these CGT changes are still new, puts you ahead of investors who wait until 2027 to act.