Mansion Tax Explained: Will Your Property Be Affected?

The term "mansion tax" has been debated in UK politics for over a decade, but it finally became policy when the Chancellor announced an annual charge on high-value residential properties in the November 2025 Autumn Budget. The charge applies to properties valued at over £2 million and will be collected alongside council tax from April 2028.

If you own a property that might be caught by the new charge — or if you are thinking about selling one — this guide explains how the mansion tax works, which value bands apply, how it interacts with existing property taxes, and what it means for your selling decision. For a broader look at the costs involved in selling, see our guide on how much it costs to sell a house in 2026.

What is the mansion tax?

The mansion tax is an annual charge levied on residential properties in England and Wales with a market value exceeding £2 million. Despite its name, it is not a standalone tax collected by HMRC. Instead, it operates as a supplementary charge layered on top of council tax, collected by local authorities in the same way and on the same billing cycle.

The policy was announced in the November 2025 Autumn Budget and is designed to raise approximately £1.2 billion per year from the highest-value properties. The government has framed it as a contribution from the wealthiest property owners towards public services, funded from assets that have appreciated significantly over the past two decades.

The charge applies regardless of the owner's income or circumstances. It is a property-based levy, meaning it follows the property, not the person. If you own a qualifying property, you pay the charge whether you live in it, rent it out, or leave it empty.

Mansion tax value bands and annual charges

The mansion tax uses a tiered banding system based on the property's assessed market value. The bands and annual charges for England and Wales are as follows:

These are flat annual charges per band, not marginal rates. A property valued at £2.5 million pays the same £2,500 as one valued at £2.9 million. This creates a cliff-edge effect at each threshold, particularly at the £2 million entry point, where a property valued at £1,999,999 pays nothing and one valued at £2,000,001 pays £2,500 per year.

The government has indicated that bands will be reviewed every five years and may be adjusted in line with property price inflation to prevent "fiscal drag" — the gradual expansion of the charge to properties that were not originally intended to be caught.

How properties are valued

The Valuation Office Agency (VOA) — the same body that sets council tax bands — is responsible for valuing properties for the mansion tax. The key details are:

• Valuation date: 1 April 2027. The market value of your property on this date determines which band you fall into.
• Valuation method: The VOA will use a combination of HM Land Registry transaction data, comparable sales evidence, and existing valuation records. Properties that are clearly above or below the £2 million threshold may be assessed using desk-based methods, while borderline cases or unusual properties may require an individual inspection.
• Notification: Property owners will receive a notification of their assessed band in late 2027, ahead of the charge taking effect in April 2028.
• Appeals: If you disagree with your valuation, you can appeal through the existing council tax valuation appeal process. The Valuation Tribunal for England handles appeals in England, and the Valuation Tribunal for Wales covers Welsh properties.

Properties near the £2 million boundary are likely to generate the most appeals. If your property is close to a threshold, it may be worth obtaining an independent RICS valuation before the assessment date so you have evidence to support an appeal if needed.

Who pays the mansion tax?

The charge applies to the person or entity liable for council tax on the property. In most cases, this is:

• Owner-occupiers: If you live in the property, you pay the mansion tax alongside your council tax.
• Landlords with empty properties: If the property is unoccupied, the freeholder or long leaseholder is liable.
• Landlords with tenants: Where a property is let, the council tax liability (and therefore the mansion tax) typically falls on the tenant for whole-house lettings. However, for houses in multiple occupation (HMOs), the landlord is usually liable. Check your tenancy agreement and local authority guidance.
• Companies and trusts: Corporate bodies and trusts that own qualifying residential properties are liable. This is in addition to the Annual Tax on Enveloped Dwellings (ATED), which already applies to corporate-owned properties over £500,000.

There is no exemption based on income, age, or personal circumstances. Unlike council tax, which offers reductions for single occupants and exemptions for certain categories (students, severely mentally impaired persons), the mansion tax is a flat charge with no discounts. The government has resisted calls for a deferment option for asset-rich, income-poor owners (such as pensioners who have lived in their homes for decades and seen values rise around them).

How the mansion tax interacts with council tax

The mansion tax is not a replacement for council tax. It is an additional charge collected on the same bill. If you own a property valued at £2.5 million, you will pay your existing council tax (which in most areas ranges from £2,000 to £4,500 per year depending on your band and local authority) plus the mansion tax of £2,500. Your total annual bill to the local authority could therefore be £4,500 to £7,000 or more.

The mansion tax is paid in the same monthly instalments as council tax (typically ten monthly payments from April to January). There is no option to pay it separately or on a different schedule. Council tax enforcement powers — including liability orders, attachment of earnings, and ultimately bankruptcy proceedings — apply equally to the mansion tax element of the bill.

Importantly, the mansion tax does not change your council tax band. Your property remains in whichever council tax band it was assessed at under the 1991 valuation (in England) or the 2003 valuation (in Wales). The mansion tax uses a separate, more recent valuation based on the 2027 assessment date.

Scotland's separate system

Council tax is devolved in Scotland, meaning the Scottish Government has the power to set its own property tax framework. Scotland is introducing its own version of the mansion tax, but with key differences:

• New council tax bands. Rather than creating a separate supplementary charge, Scotland is adding new council tax bands above the existing Band H (which covers properties valued at over £212,000 on the 1991 valuation date). The new bands will apply to high-value properties based on a 2027 revaluation.
• Threshold. The Scottish system also uses £2 million as the entry point, but the bands above this may differ from the England and Wales structure. The Scottish Government is consulting on the exact thresholds and charges.
• Timing. The Scottish version is expected to take effect from April 2028, the same date as England and Wales. The Scottish Government has committed to aligning the implementation date to prevent cross-border arbitrage.
• Administration. Scottish Assessors (the equivalent of the VOA in England) will carry out the valuations. Appeals will be handled by Scottish local authorities and, if unresolved, by the Scottish Courts and Tribunal Service.

If you own a high-value property in Scotland, check the Scottish Government's consultation documents for the latest information on proposed bands and charges.

Impact on the housing market

The announcement of the mansion tax has already had a measurable effect on the top end of the housing market. Estate agents in prime London, the Home Counties, and other high-value areas have reported:

• A softening of asking prices for properties in the £2–3 million range, as sellers and agents price in the future annual charge
• Increased interest from sellers looking to sell before April 2028 to avoid the charge
• Buyers using the mansion tax as a negotiating lever to reduce offers, particularly on properties close to the £2 million threshold
• A small number of sellers instructing developers to split larger properties into separate units to bring each below the threshold

For properties well above the £2 million mark, the impact on price is expected to be modest. An annual charge of £4,500 on a £4 million property represents roughly 0.1% of the value per year — significant over time, but unlikely to be a decisive factor for buyers in this bracket. The sharpest price impact is likely to be on properties valued between £1.8 million and £2.2 million, where the cliff-edge effect creates a strong incentive for buyers to negotiate below the threshold.

How the mansion tax affects selling decisions

If you own a property that is likely to be valued above £2 million, the mansion tax introduces a new consideration when deciding whether and when to sell. Here are the key factors:

Selling before April 2028

Some owners are considering selling before the charge takes effect to avoid the ongoing annual cost. This can make sense if you were already thinking about selling, or if the annual charge would be a significant burden relative to your income. However, be aware that if many owners in your area have the same idea, increased supply could push prices down — meaning you might achieve a lower sale price than you would in a less crowded market.

Pricing near the threshold

If your property is valued close to £2 million, you and your estate agent will need to think carefully about pricing. A property listed at £2.1 million will attract the annual charge, while one at £1.95 million will not. Buyers are acutely aware of this distinction and may resist paying above £2 million unless the property clearly justifies the premium. This could create a "dead zone" in pricing between roughly £2 million and £2.1 million where properties are difficult to sell.

Impact on overall selling costs

The mansion tax does not directly increase your costs as a seller — it is paid by the owner during the period they own the property. However, it may indirectly affect your sale proceeds if buyers reduce their offers to account for the future annual charge. For a comprehensive view of all the costs involved in selling, see our guide on how much it costs to sell a house in 2026.

Interaction with capital gains tax

If the property you are selling is not your main residence, you may also be liable for capital gains tax on the sale. The mansion tax does not reduce or offset your CGT liability — they are separate charges. This means owners of high-value second homes or investment properties face a triple burden: capital gains tax on disposal, Stamp Duty Land Tax on purchase, and the mansion tax during ownership. Factor all three into your financial planning.

Existing property taxes on high-value homes

The mansion tax joins a growing list of property-related charges that affect high-value homeowners. Here is how they fit together:

For a full breakdown of the costs you face when selling, including estate agent fees, solicitor fees, and all other disbursements, see our guide on how much it costs to sell a house in 2026.

Practical steps if your property is affected

If you think your property may be valued above £2 million, here are the practical steps to take before April 2028:

1. Get an up-to-date valuation. Instruct a RICS surveyor or ask two or three local estate agents for a market appraisal. This gives you a realistic sense of where your property sits relative to the thresholds.
2. Review your financial position. Consider whether the annual charge is affordable within your current income and budget. For some homeowners — particularly retirees on fixed incomes — an additional £2,500 to £7,500 per year may be a significant strain.
3. Take tax advice. If you are considering selling, a tax adviser can help you understand the full picture: capital gains tax, Stamp Duty on any onward purchase, income tax implications, and the ongoing mansion tax. The right time to sell depends on your complete tax position, not just the mansion tax in isolation.
4. Consider timing. If you decide to sell, starting the process in 2026 or early 2027 gives you the best chance of completing before the charge takes effect. The average sale takes four to six months from listing to completion, so do not leave it too late.
5. Watch for the VOA valuation. You will receive notification of your assessed band in late 2027. If the valuation seems too high, gather evidence for an appeal immediately. An independent RICS valuation dated close to the 1 April 2027 assessment date will carry weight in any appeal.

How Pine can help

If you are considering selling a high-value property, getting your legal paperwork in order early is essential. Delays caused by incomplete documentation or unresolved legal issues can push your completion date past key deadlines.

Pine helps you prepare your TA6 and TA10 property information forms with guided AI support, and can order property searches at near-trade prices. By getting sale-ready before you list, you reduce the risk of delays and give yourself the best chance of completing on your timeline — whether that is before or after the mansion tax takes effect.

Sources

• HM Treasury — Autumn Budget 2025: Policy Costings — gov.uk
• Valuation Office Agency — Council Tax: how your property is valued — gov.uk
• HMRC — Annual Tax on Enveloped Dwellings (ATED) guidance — gov.uk
• Valuation Tribunal for England — Council tax appeals process — valuationtribunal.gov.uk
• Scottish Government — Council tax reform consultation — gov.scot
• Royal Institution of Chartered Surveyors (RICS) — Residential property valuation standards — rics.org
• Office for National Statistics (ONS) — House Price Index — ons.gov.uk

Related guides

• How Much Does It Cost to Sell a House in 2026?
• Capital Gains Tax When Selling a Second Home
• Conveyancing Costs Breakdown
• Stamp Duty When Selling and Buying

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