The government cut net migration sharply, numbers down by two thirds in a single year. The OBR models migrants as net fiscal contributors from day one. Fewer working-age arrivals means lower income tax, lower National Insurance, lower VAT receipts. The Migration Observatory and analysts at Resolution Foundation now estimate the fiscal headroom hit could reach £1 billion to £4 billion by October. The political gain from the crackdown is marginal. The fiscal cost is being printed into the budget right now.
The OBR calculates a reduction of 200,000 net migrants per year pushes borrowing up by nearly £20 billion over a forecast horizon. At smaller scale, analysts put the October headroom impact at between £1 billion and £4 billion off Healey's already compressed buffer. That buffer started at £23.6 billion and has already lost around £9 billion to rising debt costs and new commitments. Every migrant worker not arriving represents income tax and National Insurance not collected. The surcharge they would have paid on visas alone runs at over £1,000 per person per year.
Law of the Trap. The trap is a decision that appears to be a choice but was already locked before you arrived. The public demanded lower migration. The government delivered it. Now the OBR scores it as lost revenue, and Healey has to find that money somewhere else. The person at the till, paying more in taxes or watching services cut, was never told that the headline they cheered had a price tag attached. That is how the trap works. You vote for the lock. You pay for the key.
