Treasury Eyes Lower 'Mansion Tax' Threshold of £1.5m for the Budget
The pre-Budget drip acquired a number: the Treasury is considering lowering the threshold for its planned high-value property levy to £1.5m, the Saturday front pages reported, catching thousands more homes — predominantly in London and the south-east — than the plan’s earlier drafts. It joins capital-gains reform on the list of measures floating, unconfirmed and undenied, toward 28 October.
Threshold-shopping is how property taxes are actually designed: each £500,000 of descent multiplies the base — and the political exposure — and £1.5m sits at the precise line where “mansion” stops describing the housing stock and starts describing ordinary family homes in half of London’s postcodes, which is why the number leaked is best read as a negotiation with the market’s reaction rather than a decision. The behavioural forecast writes itself: transactions above the line freeze, valuations cluster beneath it, and the revenue models degrade before Royal Assent. But the Chancellor’s arithmetic needs sums only property and capital can supply, and every leak that survives a weekend undenied hardens toward policy. Watch the transaction data above £1.5m this month — the market votes before the Commons does.