Households across the UK are being urged to record their gas and electricity meter readings on March 31 to avoid paying more than necessary when new energy prices come into force.
Go.Compare has issued the warning ahead of a 6.6 per cent reduction in the energy price cap, which takes effect from April 1, 2026.
Without submitting an accurate reading before the change, customers risk having their usage estimated by suppliers, potentially resulting in charges at the current higher rate.
The comparison website's energy specialists say this simple step could prevent households from missing out on savings when the lower cap begins.
Britons are being urged to complete one 'simple' task to avoid higher energy bills
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For a typical household, the annual cost of gas and electricity will fall from £1,758 to £1,641 once the new cap is implemented.
Gareth Kloet, energy expert at Go.Compare, said: "Taking a meter reading on March 31 is one of the simplest ways to make sure you don't overpay for your energy bills and ensures that you're charged at the new, lower rate as soon as it kicks in."
The forthcoming price cap represents the lowest energy costs since September 2024, according to Go.Compare.
Thousands of households use smart meters | PALATEST DEVELOPMENTS
Ofgem regularly changes the energy price cap every quarter | GETTYWholesale energy costs remain the primary factor influencing household bills, and these have been approximately a third lower throughout the year.
Yet ongoing instability in the Middle East has introduced significant uncertainty into energy markets.
Mr Kloet warned: "The crisis in the Middle East has caused a huge amount of volatility in the market, and if this is sustained throughout the spring, we may be in for an increase in July when the next price cap is announced."
Ofgem reviews the price cap every three months, setting maximum unit rates and standing charges that suppliers can apply to standard variable tariffs.
How will the Ofgem energy price cap change this year year? | MARTIN LEWIS / XGiven this market unpredictability, Go.Compare recommends consumers review their current energy arrangements to ensure they have the most suitable deal.
Mr Kloet added: "Take a look at your current energy contract - the standing charges, unit rates and any early-exit fees. Then take this information and shop around for a deal that works for you and your energy needs, using a comparison website."
Whether opting for a fixed rate or remaining on a flexible tariff, customers should carefully examine terms and conditions, including any penalties for switching.
Those experiencing difficulty paying their energy bills are reminded to contact their supplier promptly, as providers are obligated to assist customers facing financial hardship and can arrange payment plans.