Energy prices will rise by 6.4% in April under regulator Ofgem’s new cap – a higher than expected increase adding pressure on people’s finances.

It means a household using a typical amount of gas and electricity will see their annual bill rise by £111 a year, or £9.25 a month, taking the total bill to £1,849 a year.

The cap, which puts a limit on the amount suppliers can charge for each unit of energy, affects the bills of 26 million homes in England, Wales and Scotland.

Rising wholesale costs are behind the latest price hike, the third consecutive increase in the quarterly cap.

Analysts had forecast a 5% rise in prices, before Ofgem’s announcement on Tuesday.

As well as wholesale costs, the regulator said inflation was behind the latest increase.

The rise means prices will be 9.4% – or £159 a year – higher than at the same time a year ago.

Standing charges – which are fixed fees to connect to a gas and electricity supply – are also going up again, with some customers seeing a £20 a year increase, although these vary by region.

Jonathan Brearley, Ofgem’s chief executive, said that prices remained a huge challenge for many people and accepted another increase was “unwelcome”.

Mr Brearley said customers, where possible, should consider “switching or fixing tariffs now” to try to lower costs and “provide certainty over coming payments”.

“If anyone is worried about paying their bills, I would urge them to reach out to their supplier to make sure they’re getting all the help they can,” he added.

Bills are about 50% higher than pre-Covid levels, but remain below the peak reached in 2022 when Russia’s full-scale invasion of Ukraine caused energy prices to spike.

While the cost of each unit of gas and electricity is capped, the total bill is not, so household bills will vary depending on how much energy is used.

The regulator illustrates the cap by showing the impact on the annual bill of a household with typical energy usage.