The Future of Australia’s CGT Discount: What It Means for Investment Property Owners

Australia’s Capital Gains Tax (CGT) discount is a long-standing feature of the Australian tax system and is increasingly under scrutiny. At present, individuals and trusts that hold an asset for at least 12 months can reduce the taxable portion of a capital gain by 50 percent when they sell it.

This rule applies across investment assets, including residential property. While the main residence exemption protects owner-occupied homes, the CGT discount on investment properties has become a central point of debate amid concerns about housing affordability, wealth inequality and tax fairness.

Recent political discussions, media commentary and submissions to parliamentary inquiries suggest the CGT discount may be abolished, reduced or reformed in the coming years.

Why the CGT Discount Is Being Challenged in Australia

1. Housing Affordability and Wealth Inequality

The CGT discount has become controversial partly because of its impact on the housing market.

Critics argue that the discount encourages speculation, incentivises investors to buy multiple properties and pushes up prices. This can make it harder for first-home buyers to compete in the property market.

Economists and housing advocates argue that scaling back the CGT discount could slightly improve housing affordability and redistribute opportunities toward owner-occupiers.

For example, reducing the CGT discount from 50 percent to 25 percent has been proposed by unions in submissions to government inquiries. The rationale is that investors would face higher tax on profits, potentially reducing demand for investment property. Over time, a smaller tax preference may soften upward pressure on housing prices.

2. Budget Revenue and Tax Fairness

Beyond housing market concerns, reducing the CGT discount could raise significant government revenue.

A state government submission reported that the discount cost the federal budget around $23 billion in foregone revenue in 2024–25.

Higher revenue could be used to fund:

• public housing programs
• rental assistance initiatives
• broader tax relief measures

Many economists argue that the current 50 percent discount disproportionately benefits higher-income earners, particularly those with multiple investment properties. As a result, critics suggest it contributes to the concentration of wealth.

3. Policy Proposals for Reforming the CGT Discount

Several reform ideas have been raised in policy discussions.

• Maintain the CGT Discount for One Investment Property: The Australian Greens have proposed grandfathering the existing CGT discount for one investment property but removing the discount for second and subsequent investment properties.
• Replace the CGT Discount with Indexation: Another proposal is to abolish the 50 percent discount and instead index the asset cost base to inflation. Under this approach, only the real gain above inflation would be taxed.
• Reduce the CGT Discount from 50 Percent to 25 Percent: Union submissions to government inquiries have suggested reducing the CGT discount to 25 percent for all eligible gains.

Each proposal reflects different policy priorities. Some focus on encouraging long-term investment and protecting investors from inflation. Others focus on reducing property speculation and raising additional government revenue.

Numerical Examples: How CGT Discount Reform Could Affect Investors

To understand the possible financial impact of CGT reform, consider the following stylised example involving an investment property.

Scenario 1: Current System With the 50 Percent CGT Discount

• Investor buys a property for $800,000
• Holds the property for 10 years
• Sells it for $1,800,000

Capital gain:
$1,800,000 − $800,000 = $1,000,000
Under current CGT rules, only 50 percent of the gain is taxable.

Taxable gain:
50 percent × $1,000,000 = $500,000
If the investor’s marginal tax rate is 45 percent:

CGT payable:
45 percent × $500,000 = $225,000

Net After-Tax Profit
Profit before tax: $1,000,000
Tax payable: $225,000
Net profit: $775,000

Scenario 2: Reduced CGT Discount of 25 Percent

Under a proposal to reduce the CGT discount to 25 percent:

Taxable gain:
75 percent × $1,000,000 = $750,000

At a 45 percent marginal tax rate:

CGT payable:
45 percent × $750,000 = $337,500

Net After-Tax Profit
Profit before tax: $1,000,000
Tax payable: $337,500
Net profit: $662,500

Difference Compared With the Current System
Investor pays $112,500 more tax
Net profit falls by about 14.5 percent

This example illustrates how even a partial reduction in the CGT discount could significantly affect after-tax returns and potentially influence investment decisions.

Scenario 3: No CGT Discount With Inflation Indexation

If the CGT discount were abolished and replaced with cost base indexing, the taxable gain would depend on inflation over the holding period.

Assume cumulative inflation of 30 percent over the 10 years.

Indexed cost base:
$800,000 × 1.30 = $1,040,000

Real gain:
$1,800,000 − $1,040,000 = $760,000

Taxable gain:
$760,000

Tax at 45 percent:
$342,000

Net Profit
$1,000,000 − $342,000 = $658,000

Although this result produces a slightly higher net profit than the 25 percent discount scenario, it still results in more tax than under the current 50 percent CGT discount system.

Potential Impacts of CGT Discount Changes

Impact on Long-Term Property Investors

Buy-and-hold investors typically pay CGT only when they sell an asset. A reduced or abolished discount could significantly increase the tax payable at that point.

Depending on their marginal tax rate, this may reduce after-tax returns and make property less attractive compared with other investment options such as shares or business assets.

Impact on Speculative Property Investors

A higher CGT burden on short- to medium-term gains may discourage investors who buy properties primarily for quick resale.

Lower speculative demand could reduce competition for housing stock and potentially ease upward price pressure in some markets.

Potential Impact on Housing Supply and Rental Markets

There is ongoing debate about the broader housing market effects.

Some analysts argue that reduced investor demand could free up more housing for owner-occupiers.

Others caution that if fewer investors enter the market, rental housing supply may decline. This could place upward pressure on rents and borrowing costs.

Political Reality: Will the CGT Discount Actually Change?

Pressure to reform the CGT discount continues to grow from unions, state treasuries and housing policy analysts.

Despite this, the federal government has so far ruled out immediate changes. Current policy discussions emphasise increasing housing supply through construction and development rather than altering tax settings.

That said, ongoing parliamentary inquiries and policy discussions mean the future of the CGT discount remains uncertain.

Conclusion: What CGT Discount Reform Could Mean for Investors

The CGT discount on investment properties remains a significant issue in Australia’s tax and housing policy debates.

Reducing or abolishing the discount could increase government revenue, alter investment incentives and potentially influence housing affordability.

For property investors, even modest policy changes such as reducing the discount from 50 percent to 25 percent could result in paying tens of thousands of dollars more in tax on a single property sale.

As policy discussions evolve, property owners and prospective investors may wish to seek professional tax advice to understand how potential CGT changes could affect their individual circumstances.