When switching UK energy suppliers, compare the cost of supplying your home, not the size of the proposed monthly payment. I would put annual usage, contract restrictions and service ahead of welcome offers. Great Britain and Northern Ireland have different markets, so begin with suppliers and comparison information available for your postcode. The following nine comparisons help separate a genuinely suitable tariff from a convincing advertisement.
Use electricity and gas consumption in kilowatt hours from your bill. If a comparison estimates usage from household size, replace that estimate when reliable readings are available. Account for a recent move or changed heating system. Otherwise the cheapest result may simply be priced for a household unlike yours.
Compare unit rates and daily standing charges together for each fuel. Then add any unavoidable charges. A tariff headline on Southampton Ledger is not a quote for your address. A useful annual estimate uses identical consumption across every offer, so a supplier cannot appear cheaper merely by proposing smaller monthly payments.
Distinguish fixed, standard variable and specialist tariffs. In Great Britain, the Ofgem cap covers relevant default tariffs, not every product on sale. Tracker or dynamic tariffs can react much faster to wholesale movements. A discount against a changing benchmark is different from a fixed unit price, even when the discount itself lasts twelve months.
Find out what leaving your current contract costs and what the new one would charge for an early departure. Check whether charges apply per fuel. Great Britain customers can leave a fixed tariff without an exit fee in its final 49 days. Northern Ireland customers should use their own contract terms and local consumer guidance.
Ask whether your meter will work with the product and whether smart readings will continue. For Economy 7 or another time-of-use offer, compare the expensive hours as carefully as the cheap ones. A website name such as Brighton Update tells you nothing about meter compatibility; that answer must come from the supplier and the tariff specifications.
Compare contact options, opening arrangements and evidence about complaints handling. Ofgem points consumers towards Citizens Advice supplier service comparisons. An app-only approach may suit one household and frustrate another. I would examine how a supplier handles billing corrections, not assume a polished sign-up page means dependable support after joining.
Check the comparison date and retain the offer, since available products can change. If a reward is conditional on remaining a customer for a specified period, include that condition in your decision. Do not treat an application estimate as the final contract.
Confirm whether the rate requires Direct Debit, paperless billing or another condition. Separate recurring savings from a one-off reward, and read when that reward becomes payable. Compare dual fuel with separate supplies rather than assuming one bill is cheapest. Also establish whether the opening payment estimate includes any existing debt repayment.
If you rely on additional assistance, ask how it will continue after the move. Scottish Warm Home Discount broader group applicants need particular care: current guidance says they must stay with the awarding supplier until payment. Save that confirmation independently of any news item on Newcastle Brief. Do not count an unconfirmed rebate as guaranteed switching savings.
In Great Britain, a switch requested as soon as possible should complete within five working days. You also have a fourteen day cooling-off period; choosing to wait until it ends changes the timetable. Take a switch-day meter reading. Citizens Advice says the old supplier should issue the final bill within six weeks and refund remaining credit within ten working days afterwards.
Choose the strongest overall fit after fees, restrictions and service are included. Keep the tariff confirmation and closing readings. A successful switch should improve the contract you live with, not merely produce a lower number on the first screen.
General consumer information, checked on 29 October 2026; switching protections differ between Great Britain and Northern Ireland.
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