Switch to a cheaper green energy tariff in the UK
Compare whole‑of‑market tariffs and see whether a green energy deal could cut your bills — with clear UK caveats on meter type, payment method and exit fees.
- Check estimated costs for green vs standard tariffs in minutes
- Understand what “100% renewable electricity” actually means in the UK
- Spot pitfalls: fixed deals, smart meter requirements, and regional price differences
Estimates only. Availability and prices vary by region, meter type, payment method and credit checks. Always check tariff terms, standing charges and exit fees before you switch.
Fast answer: can a green tariff be cheaper in the UK?
Yes — it can be, but it depends on your region, meter type (credit / prepayment / smart), payment method (Direct Debit vs pay on receipt), and whether you choose a fixed or variable deal. Many suppliers price green tariffs competitively; some charge a premium for certain features (like bundled carbon offsets, app perks, or “green gas” add‑ons).
Key takeaway 1
Look at estimated annual cost, not just unit rates — standing charges vary widely by region and tariff.
Key takeaway 2
“100% renewable electricity” is usually backed by REGOs (certificates) — still legitimate, but not the same as “your home is powered directly by a wind farm”.
Key takeaway 3
Check exit fees, fixed end date, and any smart meter requirement before switching — especially if you rent.
Good to know: In Great Britain, suppliers buy electricity from the grid. Green electricity claims are typically evidenced through the UK’s renewable certificate system (REGOs). Gas is different — “green gas” is often biomethane injected into the grid, or an offset-style product.
Compare cheaper green tariffs (whole of market)
Use the form to start a comparison. We’ll match you with available tariffs based on your details (including meter type and region) and show estimated costs and key tariff terms so you can make an informed switch.
What you’ll need
- Your postcode (sets regional network costs)
- Whether you pay by Direct Debit or another method
- Your meter type (credit / smart / prepayment)
- Approx usage (or your latest bill)
What we’ll show
- Estimated annual and monthly cost (where available)
- Unit rates + standing charges
- Green credentials (electricity and gas, if included)
- Exit fees, contract length, and key conditions
Renting? You can usually switch supplier as long as you’re the bill payer. If you have a prepayment meter or your landlord manages the energy account, you may need permission or extra steps.
Get your quote
Start with your contact details so we can send your comparison results and help you switch if you choose to.
How switching to a green tariff works (UK)
1) Compare like‑for‑like
Choose electricity‑only or dual fuel, then compare estimated annual cost, standing charges, contract length and exit fees.
2) Apply to switch
If you proceed, your new supplier normally handles the switch. You should not have an interruption to supply.
3) Cooling‑off period
You generally have a cooling‑off period for distance sales. Check supplier terms for timeframes and conditions.
4) First bill and meter reads
Provide a meter reading if requested (unless smart). Keep a record to avoid estimated bill issues.
Prepayment meters: options can be more limited and pricing can differ. If you’re in debt to your current supplier, you may still be able to switch in some situations, but it can be more complex.
Green tariff types: what you’re actually choosing
Not all “green” deals are identical. This table helps you compare the common options you’ll see in UK home energy comparisons.
| Tariff type | What it usually means | Best for | Watch-outs |
|---|---|---|---|
| 100% renewable electricity (REGO-backed) | Supplier matches your electricity supply with renewable certificates (REGOs) and reports a renewable fuel mix. | Most households wanting a simple, mainstream green option. | Doesn’t mean your electricity comes directly from a specific generator at the moment you use it. |
| Green electricity + “green gas” add-on | Electricity is renewable; gas may be biomethane in the grid and/or an offset-style product depending on tariff. | Dual fuel homes wanting a greener package without changing heating. | Definitions vary — check what’s included, how it’s evidenced, and whether it affects price. |
| Fixed green tariff | Rates locked for a set term (commonly 12–24 months), often with an exit fee. | Budgeting certainty, especially if you expect prices to rise. | Exit fees; may be uncompetitive if market rates fall; check end date and renewal terms. |
| Variable green tariff | Rates can change (often with notice) and may track a supplier’s standard variable pricing. | Flexibility, moving home soon, or wanting to switch again quickly. | Less certainty; standing charges may be higher; check how/when prices can change. |
Quick decision checklist
- This will likely suit you if…
- You want renewable electricity, pay by Direct Debit, and you’re happy to compare estimated annual cost (including standing charge), not headline rates.
- It may not suit you if…
- You’re on a prepayment meter with limited tariff options, you’re mid‑fix with high exit fees, or you need a tariff that allows complex meter setups (e.g., legacy Economy 7/10) and not all suppliers support it.
Two realistic scenarios (with assumptions)
These examples show how costs can differ. They’re illustrative only and not a promise of savings.
Scenario A: 2‑bed flat, electricity only (Direct Debit)
- Assumed usage: 2,000 kWh/year electricity
- Tariff 1 (standard variable): 24p/kWh + 55p/day standing charge
- Tariff 2 (green fixed 12m): 23p/kWh + 50p/day standing charge, £50 exit fee
Estimated annual cost: Tariff 1 ≈ £681; Tariff 2 ≈ £645 (about £36 less).
Calculation: (unit rate × usage) + (standing charge × 365). Exit fee only applies if you leave early.
Scenario B: 3‑bed house, dual fuel (mixed usage)
- Assumed usage: 3,100 kWh/year electricity and 12,000 kWh/year gas
- Tariff 1 (green variable): Elec 25p/kWh + 60p/day; Gas 6.5p/kWh + 33p/day
- Tariff 2 (green fixed 24m): Elec 26p/kWh + 52p/day; Gas 6.2p/kWh + 30p/day, £100 exit fee
Estimated annual cost: Tariff 1 ≈ £1,824; Tariff 2 ≈ £1,809 (about £15 less).
A higher electricity unit rate can still be competitive if standing charges are lower. Always compare total cost.
Important: Your actual cost depends on your region, usage, and tariff terms. For Economy 7/10 or smart tariffs with time-of-use rates, the split of day/night usage matters a lot.
Costs, exclusions and common pitfalls (read before you switch)
1) Standing charges can outweigh a cheaper unit rate
Two tariffs can have similar unit rates but very different standing charges. If you’re a low user (e.g., small flat), a lower standing charge can matter more than a slightly lower p/kWh.
2) Fixed tariffs may have exit fees
If you might move home or plan to switch again soon, a fixed green tariff could cost more overall if you pay an early exit fee. Always check the fee per fuel and the rules.
3) Payment method changes your price
Direct Debit deals are often priced differently from pay-on-receipt. If you prefer to pay on receipt or by cash/card, expect fewer options and sometimes higher rates.
4) Smart tariffs may require a compatible smart meter
Some greener deals are time‑of‑use (cheap off‑peak) and require a working smart meter. If your smart meter isn’t communicating, you may not be eligible.
5) Economy 7 / complex meters
If you have Economy 7/10, heatwise, or an older multi‑rate setup, not all suppliers support all configurations. Confirm compatibility before applying.
6) “Green gas” wording varies
Some tariffs include biomethane, some use certificates, and some use offsets. If this matters to you, read the tariff’s evidence and supplier fuel mix statement.
Tip: When comparing green tariffs, filter for the features you truly need (e.g., no exit fees, variable only, or prepayment compatible). “Green” shouldn’t mean paying for extras you won’t use.
FAQs: switching to cheaper green energy in the UK
Is green energy always more expensive?
No. Some green tariffs are priced in line with (or sometimes below) other deals, but it depends on standing charges, your region and usage, and whether the tariff is fixed or variable. Always compare the estimated annual cost and key terms.
What does “100% renewable electricity” mean in the UK?
Typically, it means the supplier matches the electricity you use with renewable certificates (REGOs) and reports a renewable electricity fuel mix. Your home still draws from the national grid, but the supplier’s purchasing and reporting supports renewable generation accounting.
Can I switch to a green tariff with a prepayment meter?
Often yes, but choices can be more limited and prices can differ. If you have debt on the meter, switching may be restricted or require extra steps. It’s worth comparing specifically for prepayment‑compatible tariffs.
Will my supply go off when I switch?
In normal circumstances, no. Your energy still comes through the same pipes and wires. The change is mainly billing and who supplies you. You may be asked for a meter reading around the switch date.
Do I need a smart meter to get a cheaper green tariff?
Not always. Many green tariffs don’t require a smart meter. However, some of the cheapest or most innovative deals can be time‑of‑use tariffs that do require a working, compatible smart meter.
What should I check before leaving a fixed tariff?
Check your contract end date and any exit fees (sometimes per fuel). If you’re near the end of a fix, it may be cheaper to wait. If you’re moving home, ask whether the tariff can be transferred to the new address.
How do regional prices affect green tariff comparisons?
Electricity and gas standing charges and unit rates can vary by region due to network costs. That’s why the same named tariff can show a different estimated cost depending on your postcode.
Is a dual fuel green deal always cheaper than separate suppliers?
Not necessarily. Dual fuel can be convenient, but the cheapest option can be separate electricity and gas suppliers. Compare the total estimated annual cost for both fuels and the standing charges.
Trust, transparency and how we assess “cheaper green”
Our methodology (plain English)
- We compare estimated total cost (unit rate × usage + standing charge × days) where tariff data allows.
- We treat “cheaper” as context-specific: a tariff can be cheaper for one household (low standing charge) but not another (high usage).
- We account for UK specifics including region-by-postcode pricing, meter types (credit/smart/prepay), and payment method differences.
- We surface key conditions such as contract length, exit fees, eligibility limits, and smart meter requirements.
- We do not promise savings. All results are estimates and subject to supplier terms and changes in prices.
Limitations: If you have a time-of-use tariff (e.g., EV charging or smart off-peak), accurate comparisons require your consumption split by time band. For Economy 7/10, day/night usage split changes outcomes significantly.
Sources (UK)
- Ofgem (UK energy regulator) — switching, rules and consumer protections.
- Citizens Advice: energy — practical guidance on bills, complaints and switching.
- GOV.UK: energy guidance — policy and official information.
- Ofgem: Renewable Energy Guarantees of Origin (REGOs) — how renewable certificates work.
Editorial note: Supplier claims and tariff names change frequently. Always confirm the tariff information and T&Cs shown during sign-up.
Ready to check cheaper green tariffs?
Compare whole‑of‑market deals with clear pricing, standing charges and contract terms — then switch only if it suits you.
We show estimated costs and key tariff terms so you can make a confident decision. Savings are not guaranteed and depend on your usage, region, meter and supplier terms.
Back to Energy Suppliers