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Answer: The cheapest energy deal for you depends on your usage, region, meter and payment method — not a single national “cheapest supplier”. Compare live unit rates and standing charges against your consumption, check exit fees, then switch online if a tariff beats your current SVT or fixed deal.
Last updated: 11 September 2026
Why “cheapest supplier” lists mislead
League tables often assume one typical household. If you use more electricity than gas (heat pump, EV, Economy 7) or live in a high standing-charge region, the winner changes. Always compare with your postcode and kWh.
What to compare on every quote
- Electricity and gas unit rates (p/kWh)
- Standing charges (p/day)
- Exit fees and fix length
- Payment method (Direct Debit is usually cheapest)
- Dual fuel vs separate gas and electricity deals
Price cap vs cheap fixed deals
If you are on a default tariff, Ofgem’s energy price cap limits rates — but a competitive fixed deal can still undercut it. From October 2026 the typical capped Direct Debit dual-fuel level is about £1,723 a year; your saving depends on whether a fix beats your actual rates after fees.
Cheapest deals for different situations
- Average dual-fuel home: start with compare gas and electricity
- Looking at live offers: see energy switch offers UK
- Business sites: domestic “cheap deals” do not apply use business energy comparison, business electricity or business gas
How to switch once you find a cheaper tariff
Follow the steps in how to switch energy supplier. Most home switches take around three weeks and should not interrupt supply.
FAQs
Is there one cheapest energy company in the UK?
No. Rankings change with wholesale prices, your usage and where you live. Personalised comparison is more reliable than a static list.
Are tracker or variable deals cheaper?
Sometimes, when wholesale prices fall — but they can rise too. Fixed deals trade certainty for a locked rate.
Do green tariffs cost more?
Not always. Compare the price like any other tariff; “green” describes supply sourcing, not automatically a premium.
Can prepayment customers get cheap deals?
Yes, but the range is often smaller. Compare prepay-eligible tariffs and check any debt rules before switching.
Next step: Compare prices now · Start on EnergySwitch · Switching FAQ
