Labour Considers Lowering Mansion Tax Threshold to £1.5M

Labour is reportedly considering lowering the threshold for the "mansion tax," officially known as the high-value property surcharge, to £1.5 million from its current £2 million. This potential change, discussed ahead of an upcoming budget, could impact up to 300,000 homes, particularly in London and the South East.

Chancellor John Healey is exploring this measure as the government faces pressure to raise approximately £10 billion due to soaring spending and increased borrowing costs. Lowering the threshold could generate an estimated £800 million towards the government's fiscal headroom, which has reportedly dwindled from £23 billion to around £5 billion. This comes as experts suggest tax increases are the most viable route for the Chancellor to address fiscal challenges, with wealth taxes like the mansion tax potentially appealing to Labour's backbenchers.

The tax, initially introduced in last year's budget for homes valued over £2 million, is set to take effect in April 2028. Under the current plan, properties valued between £2 million and £2.5 million would face an annual surcharge of £2,500, rising to £7,500 for homes exceeding £5 million. If the threshold is lowered to £1.5 million, it would more than double the number of affected households.

Government sources have indicated that lowering the threshold is a "live discussion" within the Treasury. One Whitehall source suggested it is a practical option because the Valuation Office is already identifying homes above £2 million, making it a less significant administrative change to include those above £1.5 million. However, other sources have expressed concerns that a £1.5 million threshold could ensnare a substantial number of more modest London properties.

Housing experts have voiced warnings that such a move could negatively impact the housing market, potentially leading to a downturn. Aneisha Beveridge, head of research at Hamptons, stated that lowering the threshold would be "very challenging" and could further distort the market. She noted that prices in the £2 million-plus bracket have already seen a 6.5% decrease as sellers attempt to avoid the existing tax threshold to attract buyers.

Lucian Cook, head of residential research at Savills, echoed these concerns, suggesting that many middle-class families in London and the South East would be affected. He described the tax as potentially shifting from taxing "mansions" to taxing "relatively large family homes" in many parts of London. Cook also highlighted the risk that homeowners under financial strain might be forced to leave their homes due to the tax burden.

Estate agent Mark Pollack of Aston Chase in London believes that reducing the levy to £1.5 million would ensnare families who would struggle to pay even a reduced surcharge. He criticized the misconception that the tax would only affect the super-wealthy, arguing it could be the breaking point for individuals already contending with rising interest rates and energy costs.

Four London councils—Wandsworth, Kensington and Chelsea, Westminster, and Richmond—have written to Mr. Healey urging reconsideration, likening the proposal to the historical window tax. They emphasized that not all residents in homes valued above £1.5 million are wealthy and some could be forced to sell their family homes.

Conversely, Arun Advani from the Centre for the Analysis of Taxation suggested that lowering the threshold would lead to more equitable property tax rates.

A Treasury spokesperson stated that decisions regarding taxation are for the Chancellor to announce at fiscal events and declined to comment on rumors or proposals. Opposition leader Kemi Badenoch has criticized the plans as indicative of Labour's "politics of envy."