The UK government posted a £1.8bn deficit in July — a month that typically runs near surplus thanks to self-assessment income tax collections. City economists had forecast a shortfall of zero. Self-assessment receipts did come in £1.7bn higher than July last year, reaching £17.1bn, but the Office for National Statistics said spending growth outpaced receipts across the board. The cumulative deficit for the first four months of the financial year stands at £56.7bn. That is lower than the same period last year, but still £2.3bn ahead of the Office for Budget Responsibility's forecast — a gap that compounds the political difficulty for John Healey as he prepares his 28 October budget. The fiscal weather has deteriorated sharply since Rachel Reeves's spring statement in March, delivered just as the Iran war was beginning. At that point Reeves held a £23.6bn buffer against her fiscal rules. Analysts now believe a significant share of that headroom has been consumed by a triple squeeze: higher inflation, slower growth, and rising bond yields driven by energy-related price pressures. Gilt yields are the immediate headache. Ten-year yields have breached 5%, and as Martin Beck of WPI Strategy notes, these will gradually feed through into a larger debt-interest bill as existing debt is refinanced. With total public debt at £2.98tn — 94% of GDP, up £96bn in a year — even small moves in borrowing costs carry enormous fiscal weight over time. Healey faces a budget in which every major spending pressure is pulling in the same direction. He must find an additional £1.2bn annually for the defence investment plan — a shortfall that prompted his resignation as defence secretary in June. Inherited spending plans need loosening. Housing, infrastructure, and public services demand investment. And the government's fiscal rules leave diminishing room to manoeuvre. Healey's public response leaned on the G7 comparison — the UK is cutting its deficit faster than any other G7 economy — while emphasising cost-of-living support and youth employment. The framing is defensible but beside the point: the constraint is not pace of consolidation but the absolute level of debt and the cost of servicing it in a higher-rate environment. The structural picture is a government borrowing to invest in infrastructure — a defensible strategy when rates are low and growth returns are high — running headlong into a world where rates are not low and growth returns remain uncertain. The 28 October budget will reveal how Healey resolves the arithmetic. The bond market will grade his homework in real time.
