Martin Lewis has warned millions of households in the UK that they'll see an increase in their energy bills from the first month of 2023.
In January, energy regulator Ofgem is set to change its price cap, which will result in people paying more on their monthly bill - which many will not be expecting.
To warn people about the unexpected price hike, Birmingham Live reports that the Money Saving Expert spoke out and explained why this was happening, and how much extra people could expect to be paying.
On his popular online advice site, Martin said: "The energy price guarantee was meant to guarantee prices until the end of March (when we know the cost people pay will increase by 20%). So it will come as a surprise to many to see prices change in January.
"For most people the change will be trivial, but it is disappointing to see more substantial increases, with some on prepay meters seeing rises of 1%, which include most of the poorest in society."
He continued: "I have already been in touch with the Department for Business, Energy and Industrial Strategy to ask if this can be looked at, as it does not seem fair.
"The bump up for those who pay in receipt of bills takes the premium for paying that way to more than 10% over direct debit – so while many like the extra control, it's important to be aware that with typical bills from January you'll pay £260 a year for it."
For people on a prepayment meter, the average yearly energy bill will rise from £2,559 to £2,579, a rise of 0.8 per cent.
People who pay on receipt of bill can expect a price rise of 1.4 per cent, paying £2,715 rather than £2,754. These were calculated based on Ofgem's typical annual use of 2,900kWh of electricity and 12,000kWh of gas.
Grant Shapps, Secretary of State for Business, Energy and Industrial Strategy, said: "This is marginal for most people."
"Changes to bills here are about the way the price cap operates to reflect cost to serve, rather than related to the energy price guarantee."
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