Financial experts have issued a warning ahead of the new energy price cap being introduced next month.
Bills are set to climb once again on October 1, and although new Prime Minister Liz Truss recently announced a freeze on household bills at £2,500, it's still an increase on the current figure which is around £1,971.
A few months ago, Martin Lewis and other experts suggested that households should submit a meter reading the day before the new April price cap kicked in.
This is so the energy companies know exactly what your usage was before the new rates, and it should stop you from being charged for energy you don't use.
With the October price cap coming in just next week, households should do the same again on September 30, Liverpool Echo reports.
Speaking on his ITV show, Martin said: "That way you draw a line in the sand that says to your energy firm, I've only used this amount at the cheaper rate."
To submit a meter reading, you'll need to know the first five numbers shown from left to right and send them to your energy supplier. You can do this over the phone, online or through an app.
Digital meters will show five numbers in black and white, followed by one or more red numbers. You don't have to include the numbers in red.
Under the "Energy Price Guarantee" - also referred to as the October Price Freeze - which starts from October 1, a typical household will pay an average of £2,500 a year on their energy bills, frozen until 2024. Some households may pay less than this, while others will pay more.
Before this announcement, household bills were expected to climb to £3,549 per year.
Although the cap is lower now, people can still get the £400 one-off fuel bill discount that was promised. It will be made in six instalments over six months starting in October, and doesn't need to be paid back.
The automatic discount will apply to anyone who pays for their electricity via standard credit, payment card or direct debit. Customers who use the traditional prepayment meter will receive equivalent discount vouchers through text, email or post.
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