What the High Value Council Tax Surcharge actually is
"Mansion tax" is a nickname — the actual policy is the High Value Council Tax Surcharge (HVCTS), announced in the 2025 Budget. It isn't a new, separate tax bill: it's an additional surcharge added on top of a property's existing council tax bill, collected by the local authority on the government's behalf and passed on to central government. Only the owner of the property is liable — not whoever actually lives there, which matters if you own a high-value home you rent out rather than occupy yourself.
The confirmed bands, as announced
Under the plan announced so far, homes valued at £2 million or more in England fall into tiered bands:
- £2m–£2.5m: £2,500 a year
- Graduated bands rising through the mid-range
- £5m and above: £7,500 a year
Charges are due to be indexed to inflation (CPI) from 2029/30 onward. A public consultation on the detail was planned for early 2026, with the surcharge itself targeted to start in April 2028. Nationally, it's projected to raise around £430 million a year for local government services once it's up and running.
Is my home actually "high value" for this?
The £2m threshold is based on a property's current market value, not its existing council tax band — those bands were set decades ago and no longer reflect actual prices in most of the country. That's exactly why implementing this surcharge is more complicated than it sounds: valuing individual homes accurately, and handling the homes that sit right on the boundary of a threshold, is a genuine administrative challenge that analysts have flagged as still unresolved. If your home is anywhere near £2m, the practical valuation process — not just the headline threshold — is worth watching for in the consultation outcome.
The reported £1.5m scenario
Since the summer, reporting has suggested the government is actively weighing whether to lower that £2m entry point to £1.5 million — the Mail on Sunday reported it in July 2026, and The Times described it as "under active consideration" in September 2026. Neither is an official announcement.
If it happened, the effect would be substantial: roughly 245,000 homes would be caught, against an estimated 123,000 under the current £2m line — around 160,000 additional homes. About 85% of those newly-caught homes are concentrated in London and the South East, with Surrey the single largest local authority for new inclusions outside London itself. Modelling of this scenario suggests the new £1.5m–£2m band would be charged at £2,500 a year (matching today's lowest band), with the top band for £5m+ homes rising to £10,000 a year — and national revenue reaching roughly £800 million a year by 2028/29, about double the currently announced plan.
If nothing changes on 28 October
- £2m threshold stands
- ~123,000 homes affected nationally
- £2,500–£7,500/yr depending on band
- ~£430m/yr projected revenue
If the threshold drops to £1.5m
- ~245,000 homes affected nationally
- 85% of new inclusions in London & South East
- New top band modelled at £10,000/yr
- ~£800m/yr projected revenue
What this means if you're near the threshold
Reported plans aren't policy, and restructuring how you own a property, or rushing a sale, based on speculation is rarely a good idea — the specifics can and do change right up to the Budget itself, and sometimes afterward during consultation. If your home's value is genuinely close to either £1.5m or £2m, the sensible steps are the boring ones: get a proper professional valuation rather than relying on estimates, keep an eye on the actual consultation response when it's published, and speak to a tax adviser before making any ownership decisions specifically because of this surcharge.
Frequently asked questions
Do I pay the mansion tax if I own the home but someone else lives there?
Yes — as announced, the surcharge is due from the property's owner, not the occupier. If you own a £2m+ home and rent it out, the liability sits with you, not your tenant.
Is this the same as a council tax band revaluation?
No. Your existing council tax band doesn't change. This is a separate, additional surcharge layered on top for homes above the value threshold, billed alongside your normal council tax rather than replacing it.
When does the mansion tax actually start?
Under the plan announced in the 2025 Budget, implementation is targeted for April 2028, after a public consultation planned for early 2026. Those are the dates as currently announced — not yet revised.
Could the reporting on a £1.5m threshold be wrong?
It's possible. It's been reported by two separate outlets — the Mail on Sunday and The Times — using sourcing that describes it as under consideration, not decided. The only way to know for certain is the actual Budget announcement or a formal government statement.
What happens to my council tax if I'm just under the threshold?
Nothing changes for you specifically because of this policy — the surcharge only applies once a property's value crosses the threshold, whichever one ends up confirmed. Being just under it means no surcharge, not a partial one.
This page is for general information and doesn't constitute financial or legal advice. Everything above marked "reported" or "proposed" is not confirmed government policy — always check GOV.UK and HM Treasury's official Budget documents directly before making a financial decision.