What Property Taxes Could the Autumn Budget 2025 Change?

Chancellor Rachel Reeves is facing mounting pressure ahead of the Autumn Budget 2025. With public spending rising faster than tax revenues, economists warn she risks breaking her own borrowing rules unless new income sources are found.

To combat this, the government is looking to reform property taxes in a major way. Increases to Income Tax, National Insurance or VAT are off the table, but property taxes remain firmly in play. These changes could raise billions for the Treasury, though they may also create serious challenges.

Autumn Budget 2025 Bombshell 1: Will Stamp Duty be Abolished?

Stamp Duty has long been a huge source of income for the state. Last year alone, it brought in £11.6 billion for the Treasury. Yet it is regularly attacked as an unfair barrier to home ownership, particularly for first-time buyers who already struggle with rising house prices and deposits.

The idea of abolishing stamp duty has been floated as a bold reform. Supporters argue that removing the tax would make it cheaper and easier for people to move, helping first-time buyers get on the ladder and encouraging existing homeowners to downsize or relocate. This could increase the number of homes available on the market and improve overall mobility in the housing sector.

However, scrapping stamp duty would also leave a massive hole in government finances. To make up for the lost billions, the Treasury would need to find another source of revenue. One idea being discussed is the introduction of an annual property tax. This would be a national levy on the value of homes. While this could spread the tax burden more evenly, it may also prove deeply unpopular with homeowners, particularly those who are “asset rich but cash poor,” such as pensioners living in valuable properties but with limited income.

In short, abolishing stamp duty would be a game-changer for the property market but it comes with tough questions about who should foot the bill instead.

Autumn Budget 2025 Bombshell 2: Will Capital Gains Tax Exemptions be Removed?

Capital Gains Tax (CGT) is currently levied on the profit made from selling assets such as second homes, shares or valuable personal items. At present, an individual's primary residence is exempt from CGT, provided certain conditions are met. This exemption has long been a cornerstone of UK tax policy.

However now, Chancellor Rachel Reeves is reportedly considering removing this exemption for high-value primary residences, potentially applying CGT to sales of homes valued over £1.5 million. This proposal aims to generate significant revenue, leveraging the substantial increases in property values over recent decades.

Supporters of the reform argue that it would make the tax system fairer by ensuring that individuals who have benefited from significant increases in property values contribute more to public finances. They contend that such a change would align the treatment of primary residences with that of other assets, where CGT is typically applied to gains.

Critics, however, warn of potential drawbacks. They argue that taxing high-value homes could discourage property transactions, potentially leading to reduced market liquidity. This could hinder housing mobility, making it more difficult for individuals to move to different areas for work or personal reasons. Additionally, some homeowners, particularly those with limited income but significant property value, might be disproportionately affected by such a policy.

As the Autumn Budget approaches, it remains to be seen if this debate over removing CGT exemptions actually brings about any policy changes.

What is the Proposal About the National Property Tax?

An alternative proposed to stamp duty is an annual charge on houses valued at above £500,000. In place of a payment upon purchase, the charge would be an annual one, with escalating charges on higher-value properties.

As an example, homes slightly above the £500,000 threshold would pay a modest annual charge, whereas multi-million-pound properties would pay substantially more. Its supporters say that it would spread costs fairly and encourage mobility, but others fear it will not raise the short-term income currently provided by stamp duty.

Will Landlords’ Rental Income Face National Insurance?

Rental income is generally exempt from National Insurance contributions in the UK, unless the property letting constitutes a primary business or the individual owns multiple properties. However, Chancellor Rachel Reeves is reportedly considering extending National Insurance to rental income as part of efforts to address a projected £40 billion shortfall in public finances.

The proposed plan involves a phased introduction, with a universal rate applied to all property income and a supplementary charge on more substantial earnings. This reform is expected to raise approximately £2 billion annually, aligning rental income taxation more closely with other forms of earned income.

Supporters of this proposal argue that it would make the tax system fairer by ensuring that individuals earning income from property contribute to National Insurance, similar to those with employment income. They contend that this approach would broaden the tax base without increasing existing tax rates.

But others say that this move may discourage investment in the private rented sector, potentially leading to reduced supply and upward pressure on rents. They argue that landlords, already facing increased costs due to rising mortgage rates and stricter regulations, might pass on the additional tax burden to tenants. Some experts suggest that the policy could result in landlords exiting the market, exacerbating the housing crisis.

Will Council Tax Be Reformed?

Council Tax, based on out-of-date 1991 property valuations, is also under scrutiny. The outdated system has long been accused of being unfair, with families with similar property values paying wildly differing amounts based on their council.

Ideas for change are to bring the valuations up to date or abolish the system and introduce a more proportionate system. But this would reallocate money between areas, creating winners and losers and triggering opposition from politicians.

Conclusion

The Chancellor’s decisions on property tax reform could have far-reaching consequences, affecting not just government finances but households across the UK. Whether it’s landlords, homeowners or first-time buyers, any changes to taxation are likely to influence affordability, mobility and investment decisions. Rising taxes could make it harder for some to enter the property market, while others may rethink whether to buy, sell or rent.

Each of the proposed reforms has the potential to generate substantial revenue, from abolishing stamp duty to extending Capital Gains Tax or applying National Insurance to rental income. At the same time, these measures carry economic and political risks. Higher taxes could slow property transactions, discourage investment in the private rented sector and create wider financial pressures on households.

As the Autumn Budget approaches, all eyes will be on how the government balances these competing priorities. The key question remains whether the Treasury will implement incremental adjustments to the existing system or pursue a more ambitious overhaul of property taxation, fundamentally reshaping the way the UK taxes property.