Cheapest renewable electricity tariff for UK homes (how to find it)
Renewable tariffs change frequently and “cheapest” depends on your region, meter, and how you pay. This guide shows how to compare like-for-like and get a quote you can trust.
- See what “100% renewable” means in the UK (and what it doesn’t)
- Compare tariffs by unit rate, standing charge, fees and eligibility
- Get a whole-of-market quote in minutes (no promises, just estimates)
Estimates only. Prices vary by region, payment method, meter type, and eligibility. Always check your supplier’s tariff information label before switching.
Fast answer: the “cheapest renewable electricity tariff” is the cheapest tariff you qualify for that uses renewable electricity matching (REGOs) and fits your meter & payment type
In the UK, most domestic “100% renewable electricity” tariffs are backed by Renewable Energy Guarantees of Origin (REGOs). That means the supplier matches the electricity you use with certificates proving renewable generation happened somewhere on the grid. It doesn’t mean your home is physically powered by a specific wind farm at every moment.
Key point: “Cheapest” depends on your region (standing charge varies), meter type (single-rate vs Economy 7 vs smart time-of-use), and payment method (Direct Debit is often cheaper than prepayment). Always compare using your expected annual kWh and your tariff’s unit rate + standing charge.
Quick takeaways
- Start with the tariff information label: unit rate(s), standing charge, contract length, exit fees.
- Check eligibility: some “green” tariffs are new-customer only or smart-meter required.
- Don’t ignore standing charge: it can outweigh small unit-rate differences, especially for low usage homes.
- Be careful with time-of-use: cheap off-peak can be great, but only if you can shift usage.
What “renewable” usually includes
- Electricity matched with REGOs (UK scheme)
- Supplier fuel mix published annually
- May include optional carbon/offset claims (read carefully)
If you care about additionality (new renewable build), look for tariffs that state they buy power directly from generators or invest in new projects, not just certificates.
Best first step
Get a whole-of-market quote using your postcode and current usage. That produces a personalised ranking rather than a generic “cheapest tariff” claim.
Compare renewable tariffsCompare renewable electricity tariffs (whole-of-market)
If you want the cheapest renewable electricity tariff for your home, the fastest route is a personalised comparison based on how UK pricing actually works: region, meter type and payment method.
What you’ll need: your postcode and (ideally) your annual electricity usage in kWh from a recent bill. If you don’t know it, you can still proceed using an estimate, but your ranking may change.
Two realistic examples (with numbers)
These are illustrative estimates to show why the “cheapest renewable tariff” varies. Rates shown are example-only and not a live price. Always confirm current rates and any fees before switching.
Scenario A: low usage flat (single-rate)
- Assumptions
- 1,800 kWh/year electricity, single-rate meter, Direct Debit, typical standing charge differences by region.
- Example Tariff 1
- Unit rate 26p/kWh, standing charge 60p/day → ~£831/year
- Example Tariff 2
- Unit rate 24p/kWh, standing charge 70p/day → ~£863/year
- What this shows
- A lower unit rate can still cost more if the standing charge is higher—common for low usage households.
Scenario B: EV + smart time-of-use
- Assumptions
- 4,200 kWh/year electricity total. Of that, 1,600 kWh can be shifted to overnight off-peak (EV charging). Smart meter required.
- Example single-rate green tariff
- 27p/kWh, 55p/day → ~£1,437/year
- Example time-of-use green tariff
- Peak 32p/kWh, off-peak 10p/kWh, 60p/day → ~£1,173/year
- What this shows
- Time-of-use can be cheaper if you can reliably move usage to off-peak. If you can’t, it may cost more.
Important: Your actual bill also depends on VAT (usually 5% for domestic), your exact regional distribution area, and whether your tariff is fixed, variable, or tracker. Exit fees may apply on fixed deals.
Get your quote
Fill in your details and we’ll compare available home energy options, including renewable electricity tariffs. We’ll use your info to provide estimates and follow up about next steps.
Tip: If you’re on prepayment or have an Economy 7 meter, mention it when you compare. These can change which deal is truly cheapest.
How to compare renewable electricity tariffs (UK-specific)
1) Match your meter type
Single-rate vs Economy 7 vs smart time-of-use. A tariff can look cheaper until you apply the correct rate structure.
2) Compare total estimated annual cost
Use: (unit rate × kWh) + (standing charge × 365) + any fixed fees. This is usually more reliable than unit rate alone.
3) Check contract length & exit fees
Fixed tariffs may charge exit fees if you switch early. Variable tariffs can rise (and fall) with supplier price changes.
4) Confirm “renewable” claims
Look for the supplier’s fuel mix disclosure and whether electricity is matched with REGOs. If you want extra impact, look for direct renewable purchasing or investment.
Regional pricing in Great Britain: Electricity standing charges vary by region (distribution area). The same tariff name can cost different amounts depending on your postcode.
Comparison: which “renewable” tariff type is likely to be cheapest for you?
Use this to narrow your shortlist before you compare actual deals. The cheapest option is the one that matches your usage pattern and eligibility.
| Tariff type | Who it suits | Watch-outs | What to check |
|---|---|---|---|
| Fixed green tariff | You want price certainty for 12–24 months and you’re happy with a standard single-rate structure. | Exit fees may apply; may not be cheapest if prices fall or if you can shift usage. | Exit fee amount, contract length, standing charge, “100% renewable” basis (REGOs). |
| Variable green tariff | You want flexibility and no/low exit fees, and you don’t mind price changes. | Rates can change; not always competitive. | How often prices can change, notice period, current unit rate/standing charge. |
| Smart time-of-use (TOU) green | You have a smart meter and can shift usage (EV charging, storage heaters, dishwasher overnight). | Peak rates can be higher; savings depend on behaviour; sometimes app-required. | Peak/off-peak windows, rate guarantee length, eligibility, how rates change over time. |
| Economy 7 green | You already have Economy 7 and use a meaningful share overnight (often with electric heating). | Day rate can be higher; not ideal if most usage is daytime. | Your day vs night kWh split, exact off-peak hours, whether your meter times are correct. |
Decision checklist: likely a good fit if…
- You can share your kWh usage (or you’re happy with an estimate)
- You know your meter type (single-rate, Economy 7, smart)
- You’re comfortable comparing total annual cost, not just “pence per kWh”
- You’ve checked contract length and any exit fees
- You’ve confirmed what “renewable” means for the tariff (REGOs/fuel mix)
Not the best fit if…
- You’re in debt to your current supplier and can’t switch without agreeing a repayment plan
- You’re on a specialist meter arrangement (e.g., complex legacy set-ups) and need supplier advice first
- You can’t shift usage but are looking at aggressive time-of-use deals
- You’re on prepayment and the tariff is Direct Debit-only
If any of these apply, a quote is still useful—but expect fewer eligible options.
Costs, exclusions and common pitfalls (so you don’t pick the wrong “cheapest”)
Standing charges vary by region
Two homes with identical usage can pay different totals because standing charges are set by regional network costs. Always compare using your postcode.
Payment method restrictions
The cheapest “renewable” deal may be Direct Debit-only. Prepayment and pay-on-receipt options can be limited and sometimes priced differently.
Exit fees and switching timing
Fixed tariffs can include exit fees. Some suppliers waive fees if you’re within a certain window of your contract ending—check your terms.
Smart meter eligibility
Many time-of-use renewable tariffs require a communicating smart meter. If your smart meter isn’t working in smart mode, you may not qualify.
Discounts vs real bill savings
Intro credits and reward schemes can look attractive, but your long-term cost is mostly driven by unit rate, standing charge and how you use energy.
“Green gas” is different
This page focuses on renewable electricity. “Green gas” tariffs may include carbon offsets or biomethane claims—read the details separately.
Reality check: There isn’t one permanent “cheapest renewable electricity tariff” in the UK. Prices and availability change, and the cheapest deal for a low-usage flat can be different from the cheapest deal for an EV household—even with the same supplier.
FAQs
Are 100% renewable electricity tariffs really renewable in the UK?
Most are backed by REGOs, which certify renewable generation supplied to the grid. Your home still uses grid electricity, but your supplier matches your usage with renewable certificates. Check the supplier’s fuel mix disclosure for details.
Is renewable electricity always more expensive?
Not always. Some renewable tariffs can be price-competitive, especially where suppliers price aggressively to win customers. What you pay depends on your region, your meter type, and the exact unit rate and standing charge—not the “green” label alone.
What’s the best way to check if a renewable tariff is good value?
Compare the estimated annual cost using your kWh usage and your postcode. Then check: contract length, exit fees, payment method rules, and whether the tariff requires a smart meter (common for time-of-use deals).
Can I get a renewable tariff on a prepayment meter?
Sometimes, but choice can be more limited and pricing may differ from Direct Debit tariffs. If you have a smart prepayment meter, you may have more options than with traditional key/card meters. Always confirm eligibility before starting a switch.
Do I need a smart meter to get the cheapest renewable electricity tariff?
Not necessarily. Many competitive fixed or variable renewable tariffs don’t require a smart meter. However, the cheapest deals for EV owners or households able to shift usage are often time-of-use tariffs that typically do require one.
Will switching to a renewable tariff affect my supply or cause disruption?
Switching supplier shouldn’t interrupt your electricity supply. The physical electricity comes through the same wires; only the billing and tariff terms change. If you have complex metering or a debt situation, the process may take longer or require extra steps.
Why do quotes differ from what my friend pays on “the same tariff”?
Because regional standing charges and unit rates can differ, and so can eligibility (e.g., smart meter requirement, payment method). Also, a small change in annual kWh assumptions can shift the “cheapest” ranking.
What should I look for if I care about real-world impact, not just certificates?
Look for suppliers that explain their approach clearly—such as direct power purchase agreements (PPAs) with UK renewable generators, investment in new build, or transparent additionality claims. If a tariff is vague, treat “100% renewable” as certificate-matched unless stated otherwise.
How we assess “cheapest renewable electricity tariff” (methodology)
Our definition of “cheapest”
We focus on estimated annual cost for a household based on unit rate(s) and standing charge, using the user’s postcode and stated/estimated usage. Where tariffs have multiple rates (e.g., Economy 7 or time-of-use), the cost depends on how usage splits across time bands.
Our definition of “renewable electricity”
We treat a domestic electricity tariff as “renewable” when the supplier markets it as 100% renewable and supports this via recognised disclosure (typically REGOs and fuel mix reporting). We encourage readers to verify the supplier’s disclosure statements and tariff information label.
Limitations & caveats
- Tariff prices and availability can change quickly.
- Eligibility can depend on smart meter status, payment method, and credit checks.
- Time-of-use savings depend on behaviour and your actual load shifting.
- Some suppliers offer exclusive or retention-only deals not available to all customers.
Editorial trust signals
- Written by
- EnergyPlus Editorial Team
- Reviewed by
- Energy Specialist
- Last updated
- April 2026
Sources and further reading (UK)
- Ofgem (UK energy regulator) — guidance on consumers, prices, and the energy market
- Citizens Advice: Energy — switching, billing, and problem-solving
- GOV.UK — official government information, including energy-related schemes and advice
We also recommend checking your supplier’s tariff information label and annual fuel mix disclosure for the most direct, tariff-specific detail.
Ready to find the cheapest renewable electricity tariff for your home?
Get a personalised comparison using your postcode and usage. We’ll show estimated costs, key terms, and what to check before you switch.
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