Compare green energy suppliers for UK homes
A practical guide to comparing “green” electricity and gas tariffs in the UK—what the labels really mean, what to check, and how to switch confidently.
- Understand REGO-backed renewable electricity vs greenwashing claims
- See what changes (and what doesn’t) when you pick a green tariff
- Compare prices fairly by meter type, payment method and region
Estimates vary by usage, region, meter and payment method. Availability and terms depend on suppliers and credit checks where applicable.
Fast answer: how to compare green energy suppliers in the UK
To compare green energy suppliers for your home, focus on total cost (unit rates + standing charge), tariff type (fixed/variable), and what “green” actually means (how the supplier matches your electricity use with renewable generation and certificates). Most UK “green electricity” tariffs are backed by REGOs (Renewable Energy Guarantees of Origin). That can be legitimate, but the quality of a green claim depends on where the REGOs come from and whether the supplier also supports new renewable generation.
1) Compare like-for-like
Use your postcode, payment method (direct debit vs prepay), and meter type (credit, prepay, smart, Economy 7) so prices reflect your actual options.
2) Check what “green” includes
Look for clear wording on REGO matching, whether power is sourced from UK renewables, and any additional environmental support (e.g., PPAs, investment in new generation).
3) Avoid surprises
Confirm exit fees on fixes, price cap relevance for variables, and whether any discounts are conditional (e.g., online-only, paperless bills).
Quick reality check: choosing a green electricity tariff doesn’t route different electrons to your home. Your supplier matches your annual usage with renewable generation (commonly via REGOs) and purchases energy in wholesale markets. The impact depends on sourcing and investment choices.
Compare green tariffs in minutes
Tell us the basics and we’ll show whole-of-market home energy options you can switch to—filterable for renewable electricity and other preferences. We’ll explain key terms like standing charges, exit fees and eligibility so you can choose with confidence.
What you’ll need: postcode, whether you pay by direct debit or prepayment, and (if you have it) your latest bill for annual kWh. If you don’t have a bill, we can use a sensible estimate.
How to compare green energy tariffs (step-by-step)
- Set your must-haves: renewable electricity, fixed vs variable, app/billing preferences, and whether you need prepay options.
- Use your own usage if possible: comparisons are more accurate with annual kWh from your bill (electricity and gas).
- Compare total estimated annual cost: don’t judge by unit rate alone—standing charges vary by region.
- Read the tariff detail: exit fees, contract length, what happens at the end of a fix, and whether prices can change.
- Check the green claim: ask “Is it REGO-backed?”, “Where are the certificates from?”, and “Does the supplier do anything beyond certificates?”
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Green supplier comparison: what to look for
Not all “green” tariffs are identical. Use the table below to compare the features that matter most for UK households. The aim is to help you ask better questions—then choose the best value tariff you’re comfortable with.
| What you’re comparing | Best for | Watch-outs | Questions to ask |
|---|---|---|---|
| Renewable electricity matching Typically REGO-backed |
Households prioritising a verified renewable claim | REGOs can be sourced separately from physical power; quality varies | Are REGOs UK-based? Do you publish your fuel mix and certificate details? |
| Beyond certificates PPAs, investment, community energy |
People who want added impact beyond matching | Claims can be vague; “supports renewables” may be hard to evidence | Do you fund new generation? How much per customer? Any audited reporting? |
| Tariff type Fixed vs variable |
Fixed: certainty-minded. Variable: flexibility-minded | Fixes may have exit fees; variables can change (subject to rules) | What are the exit fees? What happens when the fix ends? |
| Standing charge Daily cost varies by region |
Low-usage homes (small flats, occasional occupancy) | A low unit rate can hide a high standing charge | What’s my standing charge for my postcode and meter? |
| Meter compatibility Prepay, Economy 7, smart |
Homes with prepay or multi-rate meters | Some tariffs are direct-debit only or exclude Economy 7 | Is this tariff available for my meter and payment method? |
Decision checklist: who green tariffs suit (and who they may not)
Usually a good fit if you…
- Want your electricity use matched with renewable generation (typically via REGOs)
- Are happy to compare total cost and not just the “green” badge
- Can switch by direct debit (often the widest availability, though not always)
- Prefer suppliers that publish clear fuel mix and sourcing information
May not be ideal if you…
- Need the absolute lowest possible price today and don’t value renewables messaging
- Have a complex setup (multi-rate, restricted meters) where tariff choice is narrower
- Are mid-tenancy and may need to move soon (a long fix with exit fees can be risky)
- Expect green gas to mean your gas is physically renewable (it’s usually carbon offsetting or biomethane certificates)
Tip: If two tariffs are close on price, use tie-breakers that improve satisfaction: clearer bills, better customer support, no exit fees, and transparent reporting on renewable sourcing.
Costs, exclusions and common pitfalls (UK-specific)
Green tariffs can be excellent value, but small details can make a big difference. Here are the most common issues we see when people compare or switch.
Standing charge surprises
Standing charges vary by region and meter type. A “cheap unit rate” tariff can still cost more overall if the daily charge is higher.
Fixes with exit fees
Fixed deals may charge an exit fee per fuel. If you might move or switch again soon, look for no-exit-fee options.
Economy 7 / multi-rate fit
Multi-rate tariffs can be great if your usage matches the off-peak hours. If not, you may pay more even if the tariff looks competitive.
Prepay availability
Some suppliers/tariffs are direct debit only. If you’re on prepayment, your choice can be narrower, so comparisons must be prepay-specific.
“Green gas” confusion
UK homes can’t usually receive “renewable gas” directly through the network. Green gas products often use offsetting or biomethane certificates.
Discounts with conditions
Intro rates, rewards or bundles may be conditional. Always read what happens after a set period and whether the supplier can change terms.
Switching safety: Switching is designed to be straightforward—your supply shouldn’t go off during a normal switch. Take meter readings on switch day (or confirm smart reads) to reduce bill disputes.
Two realistic examples (with numbers)
These examples show how the same “green” label can land differently depending on standing charge, usage and tariff type. Figures are illustrative estimates only—real quotes vary by region, market prices, meter type and supplier terms.
Scenario A: low-usage flat (electricity only)
- Home & meter
- 1–2 bed flat, credit/smart meter, direct debit
- Estimated annual electricity use
- 1,800 kWh
- Tariff 1 (green variable)
- Unit 24p/kWh, standing 55p/day
- Tariff 2 (green fixed)
- Unit 26p/kWh, standing 45p/day, exit fee £50
- Estimated annual cost
-
Tariff 1: (1,800×£0.24)=£432 + (365×£0.55)=£200.75 → ~£632.75/yr
Tariff 2: (1,800×£0.26)=£468 + (365×£0.45)=£164.25 → ~£632.25/yr
What this shows: for lower usage, a lower standing charge can offset a higher unit rate. But a fix with an exit fee may not suit if you might move.
Scenario B: family home (dual fuel)
- Home & meter
- 3–4 bed house, gas + electricity, direct debit
- Estimated annual usage
- Electric 3,200 kWh; Gas 12,000 kWh
- Tariff 1 (green elec + standard gas)
- Elec 25p/kWh + 55p/day; Gas 6.2p/kWh + 32p/day
- Tariff 2 (green elec + “green gas” add-on)
- Same as Tariff 1 + £8/month green gas add-on (estimated)
- Estimated annual cost
-
Tariff 1:
Elec: (3,200×£0.25)=£800 + (365×£0.55)=£200.75 → £1,000.75
Gas: (12,000×£0.062)=£744 + (365×£0.32)=£116.80 → £860.80
Total → ~£1,861.55/yr
Tariff 2: Total above + (£8×12)=£96 → ~£1,957.55/yr
What this shows: “green gas” is often priced as an add-on. Decide whether the extra cost aligns with what’s included (offsets vs biomethane certificates) and your budget.
Assumptions in examples: 365-day year; costs rounded; excludes one-off credits, warm home discounts, and any payment failure fees. Standing charges and unit rates shown are illustrative only and vary by region and tariff.
FAQs: green energy suppliers for UK homes
Is green electricity really renewable in the UK?
Your home stays connected to the national grid, so electricity is mixed. A green tariff usually means your supplier matches your annual use with renewable generation evidence (commonly REGOs). It’s still a recognised mechanism, but transparency matters: look for clear sourcing and reporting.
What are REGOs and why do they matter?
REGOs (Renewable Energy Guarantees of Origin) are certificates issued for renewable electricity generated in the UK. Suppliers can buy them to show renewable matching. They matter because they underpin most “100% renewable electricity” claims—so it’s worth checking whether a supplier explains how it uses REGOs and whether it supports renewables beyond certificates.
Does choosing a green tariff lower my bills?
Not necessarily. Green tariffs can be cheaper, similar, or more expensive than non-green options. Your price depends on unit rates, standing charges, your usage, your region, and whether the tariff is fixed or variable. Always compare the estimated annual cost for your postcode and meter type.
Can I get a green tariff on a prepayment meter?
Sometimes, but availability can be more limited than for direct debit. Some suppliers restrict which tariffs are offered on prepay, and prices can differ. Use a comparison that supports prepayment and confirm eligibility before starting the switch.
What about Economy 7 or other multi-rate meters?
You can compare green options, but you must compare multi-rate tariffs properly. The best option depends on how much electricity you use off-peak vs peak. If you’ve moved from storage heaters to gas/heat pump, it’s worth checking whether Economy 7 still suits your pattern.
Can my landlord stop me switching energy supplier?
If you pay the bills, you can usually choose your supplier. However, if energy is included in rent or you’re in a managed/block supply arrangement, you may not be able to switch. Check your tenancy agreement and ask your landlord/agent if you’re unsure.
Will switching interrupt my gas or electricity supply?
In normal circumstances, no. Switching is administrative: the physical supply stays on. Take a meter reading on switch day (or confirm smart readings) and keep a photo for your records in case of billing queries.
How do I avoid greenwashing when comparing suppliers?
Look for suppliers that publish a clear fuel mix, explain REGO usage plainly, and provide evidence of any “beyond REGO” claims (such as long-term contracts with renewable generators or investment reporting). If the wording is vague (“we support green projects”) without detail, treat it cautiously.
Trust, methodology and sources
Page stewardship
- Written by
- EnergyPlus Editorial Team
- Reviewed by
- Energy Specialist
- Last updated
- June 2026
How we assess “green” energy comparisons
This guide is designed to help you compare green tariffs accurately and fairly in a UK context. We focus on what changes your bill and what changes the environmental claim.
- Price comparability: we emphasise total estimated annual cost (unit rates + standing charges), because standing charges vary by region and can dominate for low usage.
- Eligibility constraints: we highlight common restrictions: prepay vs direct debit, Economy 7/multi-rate compatibility, and region-specific pricing.
- Green claim clarity: we explain REGO-backed renewable electricity and encourage checking supplier disclosures (fuel mix, certificate sourcing, and any additional support such as PPAs or investment).
- Consumer protection: we flag contract terms such as exit fees, end-of-fix rollovers, and variable tariff changes (as governed by regulation).
Limitations: supplier offerings and prices can change quickly; some tariffs are time-limited or not available in all regions/meter types. The examples on this page are illustrative and not a quote. Always confirm full tariff details before switching.
Independent UK sources we reference
- Ofgem (UK energy regulator) — guidance on switching, tariff info and consumer protections
- Citizens Advice: Energy — help on bills, meters, switching and complaints
- GOV.UK — official government information including support schemes and consumer advice
We may also use supplier-published tariff facts and fuel mix disclosures when comparing live quotes, where available.
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