Martin Lewis has issued a warning as some people may see their bills rise in July rather than fall.
Ofgem announced its July price cap will drop to £2,074, from the current Government Price Guarantee (EPG) rate of £2,500, which means the average yearly energy bill will decrease by around £427.
While the Money Saving Expert welcomes the drop, he did warn that some could see the opposite.
In a statement released after the announcement, Martin explained how those who fixed their energy bills this time last year - before prices start to skyrocket - could see an increase from July and should consider switching.
He said: "This time last year, with prices rocketing, some people took very high fixed rate deals.
"Then the Government launched the Energy Price Guarantee, and for fairness, those whose fixes were more expensive than the Energy Price Guarantee had their tariffs subsidised so they dropped to the same level.
"From July as the Energy Price Guarantee subsidy will be set as zero, that subsidy will be removed and those fixes will go back to their original price."
The Money Saving Expert advised people on these fixes to consider switching to a price-capped standard tariff - "even if you need to pay exit fees".
He added: "Though if you’re coming to the end of a fix you don’t pay exit fees in the last 49 days of the fix."
In his statement, Martin also noted that it was "a relief" that bills were going down but that many will still be paying more for their energy than during the winter last year.
He explained: "This is because, apart from for those with high use, the drop in the rates doesn’t make up for the £66 per month state support people got until April – and most are on monthly direct debit, which means they pay the same in summer as winter.
"Overall, this still leaves people paying double or more what they did before the energy crisis hit in October 2021."
He also noted that as the Government is paying "far less than planned" to support people's bills means there is some "wiggle room" for more targeted support for the winter ahead.
However, Martin said he was not holding out much hope that it’ll happen.
