Money Saving Expert Martin Lewis has issued an urgent message ahead of the price cap coming into force on Friday April 1.
He appeared on Good Morning Britain on Wednesday March 30 for a cost of living special episode where he helped explain the price cap and what people should do.
This comes as the energy price cap will increase to £1971 a year for those with typical use and for those on prepayment meters, they will see a rise of £708 a year.
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As the Mirror reports, as part of his TV special, Martin took calls and questions from viewers at home, who explained their concerns about the upcoming energy price hike.
One viewer questioned whether they should stay on the energy price cap or look for a fixed rate.
Martin replied: "The cheapest fix right now on the market is £2880, which is actually more than the prediction of the October price cap (currently at £2490+) so it isn't worth getting a fix today. It's just not worth it."
"Stick on the price cap. What you do need to watch out for is though, does your firm - because there are no open market ones here, comparison sites are gone for the minute - ever offer you a much cheaper fix deal."
He is also urging people on direct debit not to switch to prepayment if you don't have to as you will be paying more overall.
Martin has said that if the energy firm is doubling your direct debit - putting it up by 100 per cent, you need to get in contact with them and say it's not fair.
Susanna pointed out that it sounds very complicated for those who are not finance experts like himself, so the financial journalist explained what people could do in order to secure what he believes would be the best deal.
He said: "If it was to offer you a fix around 20 per cent higher than the April price cap (£1971 a year on typical use) then I would probably consider fixing for more price certainty though I can't promise it will work."
However, he did warn things could change, as he added: "So that's the line we're on right now, the cheapest fixes are far more than we think it will be in October, but this could all change because it's changing so quickly.
"With energy bills looking to rise £1300 in a year, which is absolutely what is nailing this more than anything else, people will need help or they will have to choose between starving or freezing," he said.
"When I say I'm virtually out of tools - in past times, I would say you're paying too much, you're on the price cap, you need to switch and here's the saving. There are no fixes available on the open market worth going for."
