Double blow to Healey as inflation rises to 3.5% and monthly deficit hits £24bn

Double blow to Healey as inflation rises to 3.5% and monthly deficit hits £24bn Consumer prices rise by more than expected while government’s debt interest payments surge to record high for September

Inflation surged to 3.5% last month while the government deficit was a worse-than-forecast £24.5bn, in a double dose of bad news for John Healey before next week’s budget.

The Office for National Statistics said annual inflation rose from 3.1% in August , overshooting City forecasts of a rise in the consumer prices index (CPI) to 3.4%, as a result of the surging cost of fuel.

Oil and gas prices have soared since the end of February, when the US and Israel launched their war on Iran , throttling the flow of fuel through the strait of Hormuz.

Rising inflation has also contributed to higher government borrowing costs – the key factor behind the deterioration in the public finances since the spring statement in March.

Official figures showed the government paid £10.9bn in debt interest last month: the highest September figure since records began, and only the eighth time the monthly number has been above £10bn.

Payments on some government bonds rise in line with inflation. The ONS said higher inflation had added £4bn to debt interest costs in September alone.

Total government debt is estimated to have hit £3tn for the first time – although as a share of the size of the economy it has fallen to 94%, from 95% a year ago.

In the financial year so far, public sector net borrowing was £97.8bn, the ONS said – £4.4bn lower than last year, but still £6bn higher than the independent Office for Budget Responsibility had expected.

The twin pieces of bad news underline the fact that consumers are facing a renewed cost of living squeeze, just as Healey is also under increased financial pressure.

The ONS said a rise in the cost of motor fuels was the single largest factor pushing up inflation in September. The average price of petrol rose by 8.2p a litre from August compared with a fall of 0.2p in the same period last year.

Diesel, which is often refined in the Middle East, rose by 10.7p a litre last month compared with a fall of 0.4p a litre in September 2025. Air fares, which are heavily affected by the price of fuel, dropped in September by much less than usual after the traditional summer peak.

In better news for the chancellor, the cost of clothing fell slightly and food prices growth remained steady at 1.3% as competition among supermarkets offset increases in transport costs.

Rising prices make it even more likely that the Bank of England will raise interest rates from their current 3.7% level when its monetary policy committee (MPC) meets next month. Rate setters are concerned that inflation will jump above 4% next year as the price of a wider range of goods increases in response to higher oil and gas prices.