From One-Off Payment to Annual Charge: Understanding the Potential Shift in Stamp Duty Land Tax

The way homeowners pay Stamp Duty Land Tax (SDLT) when buying property in England and Northern Ireland may be set for a notable reform. Ahead of Autumn Budget 2025, scheduled for 26 November, speculation has centred on replacing traditional approach of paying a large lump sum at purchase by a system where sellers pay an annual charge that builds up over time.

The potential reforms draw heavily on work published by Onward, a policy research organisation, in a report titled “A Fairer Property Tax” by Tim Leunig. The author's analysis argues that current SDLT creates unnecessary barriers to people moving home for work or family reasons and undermines economic growth. The proposal would replace SDLT with a national property tax paid by sellers and replace Council Tax with a local property tax, focusing charges on higher-value properties. This shift would reduce taxed transactions from approximately 63% to 22%. The proposed annual seller’s property tax is still only a Treasury idea being briefed to the press, not a legislated reform, and there is no guarantee that it will be announced in the Autumn Budget 2025.

Recent Changes to SDLT

Before considering future reforms, it is worth noting what changed in the Autumn Budget 2024. The SDLT surcharge on additional dwellings such as second homes and buy-to-let properties increased from 3% to 5%, effective from 31 October 2024. The single rate for companies purchasing residential properties over £500,000 also rose from 15% to 17%.

Additionally, temporary SDLT reliefs that had been in place since September 2022 expired on 31 March 2025, with the nil rate band reverting from £250,000 to £125,000 and the first-time buyer threshold reducing from £425,000 to £300,000.

What Is Being Proposed?

Chancellor Rachel Reeves has expressed interest in reforming the property tax system to improve housing market mobility. While no formal policy has been announced, reports suggest she is considering a "modernised property tax system" that would shift the burden from buyers to sellers.

Under the present system, buyers pay SDLT when they purchase a property. The charge kicks in at £125,000 for most buyers and rises progressively with property value. The alternative being explored would work quite differently. Instead of buyers facing this upfront cost, property sellers would pay tax based on the value of their home. The charge would accrue year by year while they lived there, then be settled as a single payment when they eventually sold.

The threshold being discussed sits at £500,000. Properties below this value would not be subject to the new charge. For properties above this level, the annual rate under consideration is around half a percent (0.54%), rising slightly for the portion of value above £1 million (additional 0.278%). The payment would also increase annually with inflation. Importantly, anyone who has already paid SDLT on their current home would be protected from paying again.

Meanwhile, Conservative Party Leader Kemi Badenoch pledged at the Conservative Party Conference on 8 October 2025 that a future Conservative government would abolish SDLT entirely on primary residences bought by UK residents. The Institute for Government estimated this would cost around £9 billion annually by 2029.

Why This Matters

SDLT generates significant revenue, and any reform must balance fairness, market mobility and fiscal stability. The current system is often criticised for discouraging people from moving, while the proposed approach aims to reduce upfront costs for buyers and shift the burden toward those with greater accumulated equity. How reform could affect affordability, fairness and property values is therefore central to the debate. The reform debate also touches on fairness. Should tax fall on people when they are stretching their finances to buy a home? Or should it accumulate gradually and be paid by those who have built up equity over time?

Current Position and Practical Guidance

Several important details have not yet been clarified, including how it would interact with existing surcharges, how annual valuations would be determined, and what appeals process would apply. Until these details are clarified, the impact of the suggested reforms cannot be reliably assessed.

For anyone planning a property transaction, the current SDLT rules remain fully in force and must be used for all tax calculations. No changes have been announced, and speculation should not be treated as policy. Buyers and sellers should base decisions on their own circumstances and market conditions, as significant tax reforms typically include transitional measures. Professional advice remains important, as individual tax positions vary depending on property value and timing.

Looking Ahead

The Autumn Budget on 26 November 2025, may provide greater clarity on whether these proposals will proceed, in what form, and on what timescale. Until then, the discussion reflects a genuine debate about how property should be taxed and what objectives the tax system should serve.

For now, understanding the nature of what is being proposed, why it is being considered, and what questions remain unanswered provides the best foundation for making informed decisions when the time comes.