Who is the cheapest energy supplier in the UK right now?

The cheapest supplier changes weekly with wholesale prices and depends on your region and usage. PowerGuardian's live comparison shows the true annual cost — including standing charges and exit fees — so you can see today's actual cheapest deal for your postcode.

Are smaller energy suppliers cheaper than the Big Six?

Sometimes, but not always. Smaller challengers occasionally undercut larger suppliers by 5–10%, but they also carry higher failure risk. Always check Trustpilot scores, complaint data and exit fees before switching to a small supplier.

Is it worth switching energy supplier in 2026?

Yes — if a fixed deal is at least 5% below the current Ofgem cap and exit fees are under £75/fuel, switching usually pays back within 3–6 months. About 60% of households on default tariffs are overpaying by £100+/year.

Does switching energy supplier interrupt my supply?

No. Switching is a back-office change between suppliers — your gas, electricity and meters stay exactly the same. The switch typically completes in 5 working days under Ofgem's faster-switching rules.

Is it worth switching energy supplier right now?

It depends on your current tariff versus the best available deals. Use our comparison and 'should I switch?' tools to see whether a fixed or better variable deal would save you money today.

How long does switching energy supplier take?

A switch typically completes within five working days, and there's a 14-day cooling-off period. Your supply is never interrupted — the same gas and electricity flow into your home.

Are there exit fees for switching?

Some fixed tariffs charge exit fees of around £30–£60 per fuel if you leave early. Variable and rolling tariffs usually have none. Always check before switching.

Will switching supplier interrupt my supply?

No. Switching only changes who bills you; the physical gas and electricity supply continues uninterrupted with no work needed at your home.

Should I choose a fixed or variable tariff?

Fixed tariffs lock your unit rates and protect against rises; variable tariffs follow the market and can fall. If prices are expected to drop, variable can win, but it carries more risk.

Cheapest Energy Supplier in the UK

"Cheapest" depends on your usage, region and tariff type. The sticker price rarely tells the full story — exit fees, admin charges and standing charges can wipe out a £100/yr saving in months.

What to look at — beyond the headline price

Unit rate (p/kWh) for both gas and electricity.
Standing charge — paid daily even if you use nothing.
Exit fees — often £75–£150 per fuel on fixed deals.
Tariff length — 12 months gives flexibility, 24 months locks in the rate.
Late payment / admin fees — buried in the T&Cs.

How we rank suppliers

PowerGuardian's comparison shows the true annual costincluding standing charges and surfaces every flaw — exit fees, admin charges, customer-service issues — so you don't get caught out.

See the cheapest tariffs we track

Before you compare, make sure you're being billed on real readings, not estimates. If your meter isn't sending data, fix common smart meter problems so your new supplier starts you on accurate figures.

Cheapest Energy Supplier in the UK

What to look at — beyond the headline price

How we rank suppliers

Frequently Asked Questions

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