Financial guru Martin Lewis has issued urgent advice for all bill payers to do the same thing by March 31.
The new energy price cap will be coming into force on April 1, hiking up millions of bills around the UK.
Energy regulator confirmed earlier this year that the price cap will rise to 54 per cent, adding an extra £693 to the average yearly household bill and £708 to those on pre-payment meters.
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With the cost of living soaring, Martin Lewis has given bill payers an urgent list of things to do before energy companies rise their prices.
He advises that everyone should be recording their meter readings regularly and check their readers.
And on March 31, the financial journalist is strongly urging bill payers to record a meter reading, a day before the new price cap.
This will allow you explain to your energy provider exactly how much energy you used before the price cap increase came into effect, reports the Mirror.
Speaking on his ITV Martin Lewis Money Show Live broadcast last week, the MoneySavingExpert 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.
“Don't start charging me more on the higher rate and estimating I use some of it afterwards."
For those who are on older prepayment meters, Martin is telling people to 'stockpile' energy now.
He explained that if you top up now, you will be charged for your gas and electric at the rate that applied when you bought it, even if you use it after the price cap changes.
Your rates shouldn’t change until the first time you top up following a price adjustment.
If you have a smart prepayment meter, this stockpile trick sadly won’t work as these meters are updated remotely with the new rates on the day of a price change.
MSE contacted 11 of the biggest energy suppliers - including British Gas, SSE, E.on and EDF - and only one said the stockpiling trick wouldn’t work.
Scottish Power was the only provider that said the additional amount you would've paid under the new rates would be recovered by adding a small amount of debt to your meter at your next annual statement.
MSE has asked Ofgem if Scottish Power is allowed to do this but hasn’t issued a further update.
