Financial journalist Martin Lewis is urging people to check if they're entitled money back just as the new energy price cap is round the corner.
Energy regulator Ofgem confirmed earlier this year that the price cap is rising and will force bills to increase by 54 per cent.
The Money Saving Expert has said he is 'out of tools' to provide help with bills and is urging the Government to intervene.
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While there are no deals with energy companies and limited financial support, Mr Lewis was speaking on ITV This Morning and pointed out that some bill payers could be owned £750.
Energy bills are set to rise from April 1 with new tariffs and a further increase is likely to hit October due to the war in Ukraine.
Come April 1, tariffs will rise 54 per cent adding an extra £693 to bills, this will total to £1,971 from £1,277. It is worth nothing that this is for the average household, prepayment users will see their bills go up by £708 and if you use more energy, you will be charged more.
But the financial guru warned that many homes will be paying even more than that.
As the Mirror reports, he received a call in from a woman who said that her annual energy bill was estimated to be £5,000, as she has a son that needs a ventilator for 22 hours a day.
Mr Lewis warned the caller, Marie, that this bill was going to get even more expensive when he was speaking on the show.
He said: "That's going to get bigger. I think we are at near-crisis stage for many people with disabilities and vulnerabilities at the moment. £5,000 is not an excessive bill compared to some of the people out there, it is going to get even higher. Intervention is absolutely critical."
He added: "I would suggest you call someone like National Energy Action to see if there are any of the energy company trust funds that are available to help you out and there is anything you are missing out on in a one-on-one assessment of your situation."
National Energy Action is a charity that helps Brits with fuel poverty. Many energy companies have launched hardship funds to help customers with rising fuel bills and associated debt.
For example, British Gas has launched its British Gas Winter Fund, which gives eligible customers up to £750 toward the cost of their energy bills. British Gas says the average payout per grant so far has been £510.
Other similar grants include the Ovo Energy Fund, E.ON Energy Fund, Bulb Energy Fund and the EDF Energy Customer Support Fund.
British Gas also has an Energy Trust Individual and Families grant that gives money off unpaid energy bills.
This is open to all customers, not just those with British Gas. The scheme will reopen on July 1. Energy providers can also set up payment plans to help customers with bills.
Elsewhere, the Warm Home Discount is available to some people on benefits with more information available at Citizens Advice. The scheme could help you take £140 off your bills.
Shelter also provides information to help people struggling to pay their energy bills - it can give more details of the Warm Home Discount and explain what you can get dependent on your particular circumstance.
