Consumer Prices Index (CPI) inflation rose to 3.1% in the 12 months to August 2026, up from 2.9% in July, according to the Office for National Statistics (ONS). Prices rose by 0.5% over the month, compared with a rise of 0.3% in August 2025.
It was the second consecutive rise in the annual rate. Transport, and motor fuels in particular, made the largest upward contribution, with transport accounting for 0.69 percentage points of the CPI rate.
The average price of petrol rose by 9.1 pence a litre between July and August to 161.3 pence, the highest the ONS has recorded since November 2022. Diesel rose by 14.2 pence to 181.8 pence. Motor fuel prices were 23.0% higher than a year earlier, up from 15.5% in the year to July.
Core inflation, which strips out energy, food, alcohol and tobacco, remained steady at 2.6%. Services inflation was unchanged at 3.4%, while goods inflation rose from 2.2% to 2.7%, its highest since September 2025.
Food and non-alcoholic drink inflation stayed at 1.3%, a rate last lower in September 2021. Electricity, gas and other fuels cost 6.0% more than a year earlier. CPIH, which adds owner occupiers' housing costs and council tax, rose by 3.3%.
Despite the uptick in inflation, the Bank of England's Monetary Policy Committee (MPC) voted by six to three to hold Bank Rate at 3.75% on 17 September, with three members favouring a rise to 4%.
The Bank now expects CPI inflation to reach around 3.75% in the last three months of 2026 and slightly above 4% early in 2027. Its regional agents expect food inflation to rise to around 4% by the end of 2026, with further risks in 2027 from energy costs, drought in Europe and El Niño.
Bailey said the longer energy price volatility persists, "the bigger the impact it will have on inflation, and the more likely it is we will need to raise Bank Rate to ensure that inflation falls back to our 2% target."
How rising prices affect your savings and income
The Bank's next interest rate decision is due on 5 November. Its decisions affect mortgage costs, the rates paid on savings and the returns available on investments.
Rising prices reduce what cash can buy over time, which matters for money held in deposits, for anyone drawing a fixed income and for the length of time a pension has to last. If inflation passes 4% as the Bank expects, cash earning less than that after tax will lose value faster.
Your financial planner can look at how much you hold in cash, how your income is structured and whether your plan still allows for prices rising at this pace. If you would like to talk it through ahead of the Budget on 28 October, please get in touch.