Treasurer Jim Chalmers has defended the Albanese Government’s controversial capital gains tax (CGT) reforms, rejecting claims they amount to an “ambition tax” and insisting the changes are designed to improve fairness rather than punish Australians who invest or build wealth.

The Treasurer made the comments during an appearance on Sunrise, where he was questioned about a growing advertising campaign criticising Labor’s tax package. Large billboards erected near Canberra Airport accuse the government of making it harder for Australians to “get ahead”, describing the reforms as a tax on aspiration.

Chalmers dismissed that characterisation, arguing the reforms should instead be viewed as part of a broader plan to improve housing affordability, reduce taxes for workers and rebalance the tax system.

“I understand that when you’re making difficult tax reforms, ambitious tax reforms, which are all about cutting taxes for workers and making things fairer for first home buyers, there won’t be unanimous support for that,” Chalmers said.

“It’s always the case in this country, when you’re engaged in difficult economic reform, and particularly tax reform, that it will be contested, there will be people who campaign against that, and that’s what we’re seeing now.”

The remarks come as Labor continues defending one of the most significant tax reform packages introduced in decades. The government argues Australia’s tax settings have increasingly favoured wealth accumulated through assets over income earned through work, making it harder for younger Australians to enter the housing market.

Under legislation introduced following the 2026 Federal Budget, Labor plans to replace Australia’s long-standing 50 per cent capital gains tax discount with an inflation-indexed system for gains accrued from 1 July 2027. Existing investments retain the current treatment for gains accumulated before that date, while investors in newly built housing will have additional transitional options designed to encourage new housing supply. The reforms are also accompanied by broader income tax relief and measures aimed at first-home buyers.

Critics argue the package will discourage investment, reduce incentives for entrepreneurship and ultimately increase the tax burden on Australians who invest in shares, property or small businesses.

The campaign against the reforms has become increasingly visible in recent weeks.

Billboards positioned outside Canberra Airport carry the message: “Getting ahead just got taxed”, warning that Australians with side businesses, cryptocurrency investments and other assets could face higher tax liabilities under Labor’s changes.

Business groups and investor advocates have labelled the package an “ambition tax”, arguing it penalises Australians who take financial risks or invest for the future.

One of the recurring concerns has centred on the potential impact on small businesses.

Some advertisements suggest business owners will be among those hardest hit by the proposed capital gains changes, particularly when selling businesses that have taken years to build.

However, the government disputes those claims.

According to the Treasurer, the overwhelming majority of active businesses will continue to qualify for existing CGT concessions that significantly reduce—or in some cases eliminate—the tax payable when eligible business assets are sold.

Following consultation with industry, the government has also announced additional concessions aimed specifically at protecting startups and smaller businesses. Officials say approximately 98 per cent of active Australian businesses remain eligible for generous CGT concessions despite the broader reforms.

Labor maintains the central objective of the reforms is housing affordability.

Ministers argue tax settings introduced decades ago have encouraged investment into established residential property while making it increasingly difficult for first-home buyers to compete.

By changing the tax treatment of future capital gains and limiting negative gearing on newly acquired established properties from 2027, the government says it expects investment to shift towards new housing construction while reducing speculative demand in the established housing market.

The package also includes measures designed to offset criticism that Australians are simply paying more tax.

Alongside the housing reforms, Labor has legislated additional income tax relief for workers, including the new Working Australians Tax Offset and a simplified instant tax deduction for work-related expenses, arguing these measures leave millions of taxpayers better off overall.

Despite those arguments, the reforms continue to divide economists, investors and the broader business community.

Some financial experts have questioned whether the government’s broader economic messaging accurately reflects business conditions.

Recent criticism has focused on claims that a rise in company registrations reflects confidence in the economy, with some analysts arguing many businesses are instead restructuring in response to the new tax rules rather than expanding operations.

Political opposition has also intensified following the passage of the legislation through Parliament.

Opponents argue the reforms risk reducing long-term investment, slowing capital formation and creating uncertainty for investors. Supporters, meanwhile, contend Australia’s tax system has long favoured wealth generated through appreciating assets over income earned from employment, contributing to widening intergenerational inequality.

The debate is expected to remain one of the defining economic issues facing the Albanese Government as implementation dates approach.

While Labor insists the reforms will improve fairness, encourage new housing construction and help more Australians purchase their first home, critics continue warning they may discourage investment and weaken confidence among entrepreneurs and long-term investors.

For now, Jim Chalmers is standing firm, arguing that meaningful tax reform is rarely popular in the short term but is necessary to address structural challenges in Australia’s economy and housing market.