Capital Gains Tax Reform: Will the Return of Indexation Really Change the Game?
For many investors and business owners, capital gains tax (CGT) has been relatively straightforward for the past 25 years. If you held an asset for more than 12 months, you could generally access the 50% CGT discount, reducing the amount of gain subject to tax.
However, from 1 July 2027, the rules are set to change significantly.
The current 50% CGT discount will generally be replaced with a system that adjusts the cost of an asset for inflation, known as cost base indexation. A minimum tax rate of 30% will also apply to relevant capital gains.
The announcement has prompted plenty of discussion among investors, accountants and business owners. The big question is simple:
Will taxpayers be better off or worse off under the new system?
The answer, perhaps surprisingly, is neither "always better" nor "always worse".
A Return to a Familiar System
For those who have been investing for decades, the concept of indexation is not new.
Before September 1999, capital gains were commonly calculated by increasing the purchase price of an asset in line with inflation. This adjusted cost base was then used when calculating the taxable gain.
When the 50% CGT discount was introduced, many investors and advisers initially worried the change would disadvantage taxpayers. Over time, it became the accepted framework and is now familiar to most Australians.
Now the pendulum is swinging back.
Instead of automatically halving the capital gain, the new rules will largely allow investors to increase the property's cost base by inflation before calculating the taxable profit.
How Will the New Method Work?
Under the current system, calculating a capital gain is relatively simple.
If an investment property was purchased for $1 million and sold years later for $2 million, the capital gain would be $1 million. Assuming the asset qualified for the discount, only half of that gain would generally be subject to tax.
Under the new system, inflation becomes part of the calculation.
Rather than receiving an automatic 50% discount, the original cost of the asset will be indexed to reflect inflation over the ownership period. Tax will then apply to the gain above that inflation-adjusted amount.
The underlying principle is that taxpayers should only pay tax on the "real" increase in value rather than gains that simply reflect rising prices across the economy.
Who Could Benefit?
One of the most interesting findings from modelling various scenarios is that indexation does not automatically result in a higher tax bill.
In fact, where asset growth is relatively modest and inflation remains elevated, some taxpayers could end up in a better position under the new rules.
Consider a property that broadly keeps pace with inflation over a long period. Under the current discount model, a substantial taxable gain may still arise even though much of the increase in value simply reflects inflation.
Under an indexation approach, much of that inflationary growth may be removed from the taxable gain calculation.
For investors holding assets that have experienced only moderate real growth, this could prove beneficial.
Who Could Pay More?
The picture changes when asset values rise significantly faster than inflation.
Historically, many Australian property markets have experienced periods where growth materially exceeded inflation.
Where property values substantially outperform inflation over an extended period, the existing 50% discount often delivers a more favourable result than indexation.
In simple terms, the larger the real gain above inflation, the more valuable the current discount becomes.
This means investors holding assets that experience particularly strong growth may ultimately pay more tax under the new rules than they would have under the existing system.
What About Property Held in a Company?
The analysis also highlights an issue that financial advisers and accountants have discussed for many years: holding investment property through a company may not always produce the most tax-efficient outcome.
Where capital gains are ultimately distributed to shareholders as dividends, the total tax outcome can often be higher than if the asset had been owned directly by an individual or trust.
Of course, tax is only one consideration when selecting an ownership structure. Asset protection, succession planning, family circumstances and business requirements may all influence the most appropriate structure.
This is why ownership decisions should never be based on tax alone.
The Bigger Issue: Planning Ahead
Perhaps the most important takeaway is that these changes are not simply about calculating tax on a future property sale.
They may influence:
- Investment decisions
- Asset ownership structures
- Business succession planning
- Estate planning strategies
- Future sale or retirement plans
Many investors have accumulated assets over decades without needing to revisit their overall structure. These reforms provide a timely opportunity to review whether those arrangements remain appropriate.
For business owners in particular, capital gains tax often becomes a critical consideration when planning an eventual business sale, property disposal, succession strategy or retirement transition.
The Bottom Line
The return of indexation does not automatically mean taxpayers will be worse off.
Equally, it does not guarantee lower tax outcomes.
The eventual result will depend on factors such as:
- How quickly the asset grows in value
- The rate of inflation
- How long the asset is held
- The ownership structure used
- The availability of any other concessions
As is often the case with tax reform, the impact will vary from one taxpayer to another.
What is clear is that the changes represent one of the most significant shifts to Australia's capital gains tax system in decades.
While 1 July 2027 may still seem some time away, investors, business owners and families with significant assets should consider reviewing their position well before the new rules take effect.
The best planning decisions are usually made before a transaction occurs, not after.
General information only
This article is provided for educational and general information purposes only. It does not constitute personal financial, taxation or legal advice and does not take into account your personal objectives, financial situation or needs. You should seek professional advice before making any decisions regarding investments, taxation, asset ownership structures or capital gains tax planning.