High Value Council Tax Surcharge: consultation signals major reform to ‘outdated’ system

On 19 May 2026, the government launched a consultation on a proposed High Value Council Tax Surcharge (HVCTS), a significant reform aimed at addressing perceived long-standing inequities in England’s property tax regime.

First announced in Budget 2025, the policy appears to be aimed at targeting what it refers to as the top 1% of residential properties by value, with the stated aim of ensuring that owners of high-value homes contribute more fairly to local taxation.

For owners and advisers dealing with high-value residential property – the tax targets properties valued at £2 million or more – the proposals introduce a new layer of tax exposure that will need to be factored in from the outset.

Why is reform being proposed?

The starting point for the proposed reform is simple: Council Tax has not been fundamentally updated since the early 1990s, meaning property bands are still based on historic valuations. This has led to what the government identifies as disparities across the system. In some cases, relatively modest homes can attract higher Council Tax bills than significantly more valuable properties. The government considers this imbalance unsustainable and inconsistent with current property values.

The HVCTS is intended to rebalance the system so that those with the highest-value assets shoulder a greater share of the tax burden.

In announcing the HVCTS consultation, Dan Tomlinson, Exchequer Secretary to the Treasury, noted:

“A £10 million mansion in Mayfair should not be paying less council tax than an ordinary family home in Darlington or Blackpool. This change tackles historic unfairness, so that those with the most valuable properties pay their fair share, helping to rebalance the system and putting money back into communities up and down the country.”

What is the HVCTS?

Under the current proposals:

• The surcharge will apply to residential properties in England valued at £2 million or more.
• It will be payable by property owners (including leaseholders where the lease was initially granted for a term of more than 21 years), rather than occupiers.
• It will operate in addition to existing Council Tax liabilities.
• The measure is expected to affect fewer than 1% of homes in England.
• Where legal and beneficial ownership is split, it is proposed that trustees (including bare trustees/nominees) will be liable for the HVCTS (rather than beneficial owners).
• There is a proposed deferral mechanism where income and assets do not exceed certain thresholds and in certain other specified circumstances, but interest at a rate to be confirmed will apply.
• A discount is suggested for charities.
• It is suggested that non-UK residents may be charged a premium.
• There are enforcement provisions proposed, together with penalties for non-compliance.

Properties caught by the regime will be placed into new value-based bands, with corresponding fixed annual charges that increase with property value (£2–2.5m = £2,500; £2–3.5m = £3,500; £3.5–£5m = £5,000; £5m+ = £7,500). It is proposed that this annual charge will increase each year in line with CPI, with revaluations taking place every five years. The HVCTS is due to take effect in April 2028, meaning that the first revaluation will be in 2033. There will be a facility for owners to appeal their property band, and any recipient of an HVCTS bill may challenge the charge where they consider they are not liable or the bill has been calculated incorrectly.

Timing and implementation

The proposed timeline is as follows:

• Consultation launch: 19 May 2026
• Consultation period: eight weeks (closing 14 July 2026)
• Start date: April 2028

The delayed implementation reflects both the need for detailed design work and the requirement for a targeted valuation exercise to identify properties within scope.

Valuation and revaluation proposals

To support the new system, properties at or above the £2 million threshold will be:

• Individually assessed by the Valuation Office
• Allocated new surcharge bands based on value
• Revalued on a rolling basis every five years, with the stated aim of ensuring alignment with market changes

Revenue and policy objectives

The government estimates that the surcharge will generate approximately £430 million per year, with funds directed towards supporting local government services.

While local authorities will administer the surcharge alongside existing Council Tax, the revenue is intended to support wider local government funding pressures.

While the OBR gives details in relation to the costings, the overall cost of implementing and administering the HVCTS is unclear. One anticipates it will be significant and may well impact, to a material extent, on the net revenue raised, at least initially.

What is being consulted on?

The consultation focuses on the technical design and delivery of the surcharge, with particular emphasis on:

• The overall structure and scope of the tax
• How properties (and ownership) should be defined and assessed
• The introduction of a deferral mechanism for taxpayers unable to pay immediately
• The billing and collection process, administered by local authorities
• A framework for appeals and challenges to valuations or liability
• Wider administration and enforcement arrangements

The government is encouraging responses from homeowners, local authorities, tax professionals, legal advisers, and the property sector, signalling that the final design has not been set in stone and is likely to take into account, or at least have regard to, the responses sought.

What are the practical implications for property owners?

Although the detail is still subject to consultation, some practical implications are already emerging:

• Owners of high-value residential property should expect additional annual costs from April 2028.
• Regular revaluations introduce a more dynamic system, replacing the largely static Council Tax framework.
• The inclusion of review and appeal mechanisms recognises the possibility of valuation challenges and disputes.
• The proposed deferral mechanism may be particularly relevant for asset-rich, cash-poor individuals, although the accrual of interest is likely to detract significantly from the attractiveness of this mechanism (and, given that the asset base is not liquid, may be viewed, to some extent at least, as penal). For elderly asset-rich, cash-poor owners, will an allowance be made for care costs?

What should stakeholders do now?

With the consultation open, there is a limited window for stakeholders, potentially, to shape the regime before it is finalised. In particular:

• Property owners and advisers should assess whether assets are likely to fall within scope.
• Legal and tax professionals may wish to review the proposed valuation and appeal processes.
• Local authorities and sector bodies should consider operational and administrative impacts.
• All stakeholders should consider responding to the consultation, particularly on areas such as deferral, valuation methodology, and enforcement.

The HVCTS is likely to be one of the most significant changes to the property tax landscape in decades. For the first time since the early 1990s, individuals living in valuable homes will need to adjust to a new and significantly different property tax system.

Further, while the HVCTS kicks in at £2 million, home owners generally should be braced for the possibility of a significant lowering of the threshold (perhaps to as low as £500,000, given the historic trajectory of other property taxes in recent years), and there is always the possibility of wholesale increases in the banding charge (again, given the historic trajectory of Stamp Duty Land Tax rates).

While framed as a fairness reform, the HVCTS will have tangible cost implications for owners of high-value property, particularly in London and the Southeast. Much will depend on how valuation, deferral, and appeal mechanisms are finalised following consultation, but affected or potentially affected stakeholders should start planning now.

If you have questions or concerns about the HVCTS or any property tax matter, please contact Michael Fluss, a member of our Tax team.