More than 100 UK millionaires ask new PM Andy Burnham to tax them more

A group of 120 UK millionaires urged new PM Andy Burnham to raise taxes on the ultra-wealthy via a “Proud to Pay” letter, with proposals including a 2% minimum annual wealth tax. Estimates cited suggest a 2% minimum tax on super-wealthy households (>£100m assets) could raise ~£10B ($13.3B) per year, while a 2% tax on wealth above £10m could bring ~£24B ($32B) annually, plus ~£12B from capital gains tax reforms. UK Treasury Chief Secretary Emma Reynolds welcomed the initiative but indicated major tax changes would be announced at the budget, implying limited immediate policy certainty.

Analysis

This is a sentiment trade on UK domestic policy rather than an immediate earnings event. In the next few days, the market should mostly treat it as noise unless the new government starts signalling a credible budget path; the first-order move would be in UK domestic cyclicals, private wealth managers, and prime London property sentiment, not in the FTSE 100 where offshore earnings dilute policy sensitivity. The cleanest near-term read-through is relative: overseas earners and exporters are insulated, while the more UK-centric part of the market is exposed to higher perceived tax drag and lower entrepreneurial appetite.

The second-order issue is avoidance and capital mobility. A wealth tax is easiest to announce and hardest to collect; if the policy is even discussed seriously over 1-3 months, the likely market response is not a surge in tax receipts but a slowdown in large-ticket investment decisions, more structuring through trusts/offshore vehicles, and weaker IPO/M&A pipelines in London. That would hit fee pools for wealth managers, private banks, and law firms before it shows up in macro data. If the fiscal debate shifts toward credible deficit reduction without material capital flight, UK gilts could actually tighten modestly on improved solvency optics.

Contrarian view: the market may overprice the revenue number and underprice the behavioural response. A headline wealth levy sounds large, but the investable impact depends on breadth, enforcement, and whether it is paired with capital gains / exit tax changes. If the budget punts or limits the proposal to symbolic measures, any selloff in UK domestics should reverse quickly; the true catalyst is the budget, not the letter. Until then, the right posture is selective and relative-value oriented, not directional beta.

Key Decisions for Investors

• No immediate outright trade: wait for the first budget signal. Use this as a watch item on UK domestic beta; if the policy stays rhetorical, fade any initial underperformance in UK-specific names within 1-3 weeks.
• Pair trade for 1-3 months: long EWU (FTSE 100 exposure) vs short EWUS (UK small-cap exposure). Thesis: domestic policy risk should hit local earners faster than multinational cash flows; target 5-10% relative spread, invalidated if the budget is softer than expected.
• Watch UK wealth-management / private-banking proxies for weakness into the budget, especially STJ.L and other affluent-client fee earners. A 5%+ drawdown on policy headlines would be a better entry than chasing the first move.
• If the debate hardens and gilt spreads stabilize, consider a small tactical long in UK duration via IGLT/UK gilt proxies on the view that higher recurring tax receipts could marginally improve fiscal credibility. Stop if the policy broadens into growth-negative corporate taxation.
• Set a reversal alert: if the budget excludes a wealth tax or narrows the base materially, cover any short exposure to UK domestics immediately; the market will likely re-rate on the absence of enforceable capital-risk.