Energy Bills and Switching Suppliers UK 2026 — Complete Guide

Best Energy Suppliers UK 2026 — Compare Gas and Electricity Providers

Compare the best energy suppliers in the UK. We review providers, tariffs, customer service, and help you find the right deal for your home.

· · 6 min read

Energy is a major cost — and while the market has been volatile, comparing suppliers can still save you money and get you better service.

Read more: See our Cost Of Living guide for a complete overview of this topic.

Best Energy Suppliers 2026

SupplierBest ForCustomer RatingGreen Option
Octopus EnergyCustomer service, innovationExcellent100% green
EDFEstablished, nuclear low-carbonGoodGreen options
British GasSize, engineer networkAverageGreen options
OVO EnergyGreen energy, appGood100% green
E.ON NextSimplicityGoodGreen options
Scottish PowerBundles, ScotlandAverageGreen options
Utility WarehouseMulti-service bundlesGoodGreen options
Bulb (Octopus)Simple tariffGood100% green
So EnergyValue, simplicityGood100% green

Provider Breakdown

Octopus Energy

FeatureDetails
Tariff typesFixed, variable, agile, tracker, EV
Green energy100% renewable electricity
Smart featuresAgile pricing, app, integrations
Customer serviceAward-winning

Pros:

  • Consistently highest customer satisfaction
  • Innovative tariffs (Agile, Tracker)
  • Great app and smart meter integration
  • 100% renewable electricity
  • Competitive pricing

Cons:

  • Some tariffs require engagement
  • Agile pricing can spike
  • Growing fast (some teething)

Best for: Those wanting best service, green energy, smart home users.

EDF

FeatureDetails
Tariff typesFixed, variable, green
Green energyGreen options, nuclear
Smart featuresGood app
Customer serviceGood

Pros:

  • Financially stable
  • Low-carbon (nuclear + renewables)
  • Good fixed deals
  • Solid customer service

Cons:

  • Not always cheapest
  • Some complaints about billing
  • Big company bureaucracy

Best for: Those wanting established, stable supplier with low-carbon options.

British Gas (Centrica)

FeatureDetails
Tariff typesFixed, variable, bundles
Green energyGreen options available
Smart featuresHive smart home
Customer serviceImproving

Pros:

  • Largest UK supplier — scale
  • Engineer network for emergencies
  • Hive smart home integration
  • Familiar brand

Cons:

  • Often not cheapest
  • Customer service historically mixed
  • Can be slow to deal with

Best for: Those wanting big brand, engineer access, Hive users.

OVO Energy

FeatureDetails
Tariff typesFixed, variable
Green energy100% renewable, carbon offset
Smart featuresGood app
Customer serviceGood

Pros:

  • 100% renewable electricity
  • Good customer service
  • Nice app
  • Competitive pricing

Cons:

  • Acquired many suppliers (integration issues)
  • Simpler tariff range now
  • Some legacy customer issues

Best for: Green-conscious customers wanting good service.

E.ON Next

FeatureDetails
Tariff typesFixed, variable, green
Green energy100% renewable options
Smart featuresGood app
Customer serviceGood

Pros:

  • Simplified propositions
  • Good app
  • Green tariffs available
  • Decent customer service

Cons:

  • Not always cheapest
  • Integration from E.ON legacy

Best for: Those wanting simplicity from established brand.

Scottish Power

FeatureDetails
Tariff typesFixed, variable
Green energyGreen options
Smart featuresOkay
Customer serviceAverage

Pros:

  • Strong in Scotland
  • Boiler/heating bundles
  • Part of Iberdrola (stable)

Cons:

  • Customer service complaints
  • Not always competitive
  • App could be better

Best for: Scottish customers, bundle seekers.

Utility Warehouse

FeatureDetails
Tariff typesBundled
Green energyOptions available
Smart featuresMulti-service dashboard
Customer serviceGood

Pros:

  • Bundle energy, broadband, mobile, insurance
  • Cashback card
  • Single bill convenience
  • Good service

Cons:

  • Best value requires full bundle
  • Energy-only less competitive
  • MLM-style referral marketing

Best for: Those wanting all utilities in one place.

So Energy

FeatureDetails
Tariff typesSimple fixed
Green energy100% renewable
Smart featuresBasic
Customer serviceGood

Pros:

  • Simple, competitive pricing
  • 100% green
  • Good customer service
  • No gimmicks

Cons:

  • Smaller supplier
  • Fewer fancy features
  • Less name recognition

Best for: Those wanting simple, competitive green energy.

Understanding Tariffs

Tariff Types

Tariff TypeWhat It Means
Variable/DefaultRates can change (with notice)
FixedUnit rates locked for term
TrackerFollows wholesale prices
AgileHalf-hourly pricing (smart meter)
Economy 7Cheaper overnight rates

Fixed vs Variable

FactorFixedVariable
Price certaintyLocked ratesCan change
Price capDoesn’t applyProtected by cap
Exit feesOften applyUsually none
Best whenPrices risingPrices falling

When to Fix

Market SituationConsider
Prices expected to riseCompetitive fixed deal
Prices expected to fallStay on variable
UncertainShorter fix (12 months)
Current fix endingCompare vs variable

Energy Price Cap Explained

What It IsDetails
Applies toVariable/default tariffs only
Set byOfgem
ChangesQuarterly
What it capsUnit rates and standing charges
ProtectionPrevents excessive charges

Note: The cap is not a maximum bill — it’s maximum unit rates. Your bill depends on usage.

How to Switch

The Switching Process

StepAction
1Gather current usage (bills/meters)
2Compare on comparison sites
3Choose new supplier and tariff
4New supplier handles switch
5Supply continues uninterrupted
6Final bill from old supplier
7New billing begins

Switching Timeline

StageTypical Time
Apply to new supplierDay 0
Cooling off period14 days
Switch completes17-21 days
Final bill from old4-6 weeks

Before You Switch

CheckWhy
Current contract end dateAvoid exit fees
Exit fees amountFactor into decision
Current tariff ratesCompare accurately
Debt on accountMust be settled

Comparison Sites

SiteNotes
UswitchWide panel
MoneySupermarketGood filters
ComparetheMarketAlso does meerkat
Citizens AdviceWhole-market impartial
Ofgem price cap compareShows vs cap

Check multiple sites — they don’t all show the same deals.

Smart Meters

Benefits

BenefitDetails
Accurate billsNo estimates
Half-hourly dataSee usage patterns
Smart tariffsAccess agile/time-of-use
Easy switchReadings automatic

Considerations

ConcernReality
“They spy on me”Data is regulated, you control sharing
“Switching issues”Much improved — SMETS2 works
“I don’t want one”Your choice, but limiting tariffs

Green Energy

Understanding Green Claims

ClaimWhat It Means
100% renewableElectricity matched by renewable certificates
Carbon offsetEmissions compensated (variable quality)
Actually generatesOwns/operates renewable generation
Green gasBiogas or carbon offset — less clear

Greenest Suppliers

SupplierRenewable ElectricityGreen GasNotes
Octopus100%SomeOwns generation
Ecotricity100%Green gasPioneer
Good Energy100%Green gasOwns generation
OVO100%OffsetCarbon conscious
Bulb100%10% green gasNow Octopus

Reducing Energy Bills

Quick Wins

ActionPotential Saving
Switch to competitive tariff£50-300/year
Smart thermostat10-15% heating
LED bulbs£40/year
Draught proofing£25/year
Turn off standby£55/year
Lower thermostat 1°C£80/year

Bigger Investments

InvestmentPotential Saving
Loft insulation£180/year
Cavity wall insulation£185/year
Solar panelsVaries hugely
Heat pump30-50% heating
Double/triple glazing£110/year

If You Can’t Pay

Get Help

OptionDetails
Contact supplierPayment plans available
Warm Home Discount£150 off bill (eligible households)
Cold Weather Payment£25 per cold week
Fuel vouchersFrom energy charities
Priority ServicesExtra support if vulnerable

Never

Don’tWhy
Ignore billsDebts grow, supply at risk
Disconnect safetyDangerous
Use dangerous alternativesRisk of harm

Switching Checklist

Before Switching✓
Current contract end date☐
Any exit fees☐
Annual usage (kWh)☐
Current unit rates☐
Smart meter?☐
Any debt on account☐
When Comparing✓
Total annual cost☐
Exit fees on new deal☐
Customer service ratings☐
Green credentials☐
Smart meter compatibility☐

Sources

  1. MoneyHelper — Everyday money