Published 2 October 2026 · Stewart Private Accounting
The May 2026 Federal Budget announced major changes to capital gains tax. The core reform is now legislated, with new arrangements applying from 1 July 2027. For business owners and investors, the practical questions are which assets are affected, how earlier gains are treated and what records will support the calculation.
Status at 2 October 2026: the Treasury Laws Amendment (Tax Reform No. 1) Act 2026 has passed. Further implementation details have been released through Treasury’s second-stage consultation. Do not assume every detail in a consultation draft is enacted.
What happens to the 50% CGT discount?
For affected gains accruing from 1 July 2027, the general 50% discount is replaced by cost-base indexation, subject to the rules and exceptions. Indexation adjusts the eligible cost base for inflation, so the calculation focuses on the real gain. The reform affects more than residential property: shares and other investments held by individuals and through relevant trusts can also be affected.
This is not a change that gives every company a new CGT discount. The entity holding the asset, the holding period, residency and available exemptions remain important. The Budget’s CGT and negative gearing explainer outlines the policy and examples.
Does “30% minimum tax” mean a flat 30% rate?
No. It is a minimum for relevant capital gains, rather than a cap. A person already paying tax above that rate does not automatically get their rate reduced to 30%. The legislation includes a calculation for any extra tax and exceptions for recipients of specified support payments. Eligibility depends on the actual payment received; being retired alone is not the test.
The minimum applies to the relevant taxable gain after the applicable adjustments, rather than to the asset’s sale proceeds. A $500,000 sale does not mean $150,000 of tax without considering the cost base, losses, exemptions and other requirements.
Are gains built up before 1 July 2027 protected?
The transitional arrangements separate the period before 1 July 2027 from the later period. Earlier gains can retain their existing treatment where the conditions are met. Holding an asset before Budget night does not, however, protect every future gain indefinitely.
For illustration, an investor bought an asset for $300,000, it is worth $420,000 at the transition date and it later sells for $500,000. Those figures identify two periods of growth: $120,000 before the transition and $80,000 afterwards, before indexation and other adjustments. This is a planning illustration, not a tax calculation or confirmation of the valuation method available for that asset.
Retain purchase documents, improvement costs, ownership history and evidence relevant to a transition-date value. Treasury’s second-stage materials address apportionment and special situations. Ask which records and valuation approach suit your asset before arranging a sale.
What about the main residence and new residential dwellings?
The main residence exemption remains, subject to its existing conditions. It is not a blanket exemption for a home used for business or rental purposes. Eligible new residential dwellings have special arrangements that can preserve access to the 50% discount. A property’s marketing label is not enough to establish eligibility.
Negative gearing is a separate reform with different transitional tests. In particular, its Budget-night acquisition rules should not be confused with the 1 July 2027 CGT transition.
Are small business CGT concessions disappearing?
No. The small business CGT concessions remain important. The general 50% CGT discount and the small business 50% active asset reduction are different concessions. The enacted amendments expand access to the active asset reduction by removing the specific $2 million turnover restriction for that concession; other conditions still need checking. Do not assume the same change applies to every small business CGT concession.
A business sale therefore needs an asset-by-asset and entity-by-entity review, including ownership, active use, shares or units, and the relevant concession conditions. The Treasury small business explainer gives additional context.
What should you do now?
- List investments and business assets, with acquisition dates and owners.
- Reconcile cost-base records and carried-forward capital losses.
- Identify proposed sales and the reasons for their timing.
- Review concession eligibility before negotiating a business sale.
- Model the CGT result separately from any proposed trust restructure.
Read our companion guide to the proposed discretionary trust minimum tax. Stewart Private Accounting can help assess the tax consequences through our tax planning services. Contact our Perth team with your asset and ownership records.
General information checked at 2 October 2026. Future law, eligibility and your circumstances can change the result. Obtain tax and legal advice before selling assets, amending a deed or restructuring.



