Switch to a green electricity tariff in the UK
Compare whole-of-market green electricity tariffs and understand what “renewable” really means—before you switch. Designed for UK homes (not business).
- See the difference between 100% renewable tariffs, REGO-backed supply and green add-ons
- Check eligibility and switching details for smart meters, prepayment and Economy 7
- Get an estimated quote with clear caveats (no promises, no guesswork)
Estimates depend on your usage, region, meter type and payment method. Tariff availability and terms vary by supplier.
Fast answer: can you switch to a green electricity tariff in the UK?
Yes—most UK households can switch to a green electricity tariff with no engineer visit and a typical switch time of around 5 working days under the UK switching process (as long as there are no complications like debt on a prepayment meter or address mismatches).
Important: “Green tariff” can mean different things. Many tariffs are backed by REGOs (Renewable Energy Guarantees of Origin), which are certificates that match renewable generation to supply, rather than physically sending renewable electrons to your home.
Key takeaways (so you don’t waste time)
- Switching is usually simple: your electricity supply stays on; your supplier handles the admin.
- Check your meter type: smart meters and traditional meters are usually fine; prepayment and Economy 7 need extra attention.
- Compare total cost, not just “green” labels: look at unit rates, standing charges, exit fees and discounts.
- Decide what “green” means to you: REGO-backed, direct renewable sourcing, or tariffs that invest in new generation.
Compare green electricity tariffs (whole of market)
Tell us a few details and we’ll match you to available green electricity tariffs for your home. We’ll show estimated costs and key terms (including exit fees and payment method rules) so you can decide confidently.
Before you start: If you have a recent bill, keep it nearby. Your postcode, payment method and meter type can change which tariffs you’re eligible for.
What happens after you submit?
- We review the details you entered and return quote options based on availability.
- If you choose to proceed, your new supplier arranges the switch and keeps you updated.
- You keep power throughout; you won’t need to change your wiring.
Get your green tariff quote
How green electricity tariffs work in the UK (plain English)
In the UK, everyone’s electricity comes through the same grid. A green electricity tariff is about how your supplier matches the electricity you use with renewable generation and/or how it supports renewable projects.
REGO-backed renewable matching
Many tariffs buy REGOs to evidence that renewable electricity was generated somewhere in the UK/Europe in an equivalent amount to what customers use.
Direct sourcing / PPAs
Some suppliers contract directly with wind/solar/hydro generators. This can be a clearer link to renewable output, but still uses the same grid.
Green add-ons & contributions
A tariff may include a contribution to environmental projects. Useful if you want additional impact, but check how funds are used and reported.
What you can check: whether the tariff states 100% renewable electricity, how it’s backed (e.g. REGOs), whether it’s audited, and whether the supplier publishes a clear fuel mix.
Compare green tariff options (what to look for)
Not all green tariffs are the same. Use this comparison as a practical shortlist tool—then confirm the current tariff terms before you switch.
| Tariff type | What it usually means | Best for | Watch-outs |
|---|---|---|---|
| 100% renewable (REGO-backed) | Supplier matches your annual use with renewable generation certificates (REGOs). | Simple, widely available green choice. | “Green impact” varies; check transparency and reporting. |
| Direct renewable sourcing | Supplier contracts directly with renewable generators (often UK wind/solar). | People who want a clearer link to generation. | Still uses the grid; tariff may not be the cheapest. |
| Renewable + carbon offset add-on | May bundle offsets or contributions in addition to renewable matching. | Those who want extra environmental projects supported. | Check what’s funded, standards used, and ongoing disclosures. |
| Time-of-use / smart tariffs | Prices vary by time (often needs a working smart meter). Some align cheaper periods with greener generation. | EV owners, flexible usage, tech-comfortable households. | Can cost more if you can’t shift usage; check peak rates carefully. |
Quick decision checklist: who a green tariff suits
- You want your supplier to evidence renewable matching (e.g. via REGOs) and publish a clear fuel mix.
- You’re happy to compare standing charge + unit rate, not just “green” branding.
- You’re not tied into an expensive fixed deal with a high exit fee (or the saving/benefit feels worth it).
- You can provide accurate details (postcode, meter type, payment method) to avoid switch delays.
Who it may not suit (or needs extra checks)
- Prepayment meters: some tariffs may be limited; debt can complicate switching.
- Economy 7 / multi-rate: make sure the new tariff supports your register setup.
- Very low usage homes: a higher standing charge can outweigh a competitive unit rate.
- Shared meters / complex supplies: flats with landlord-managed supply or unusual meter IDs need careful matching.
Tip: If you’re switching both gas and electricity, you can still choose a green electricity tariff. Gas “green” options often involve biomethane or carbon offsetting—check what you’re paying for.
Costs, exclusions and common pitfalls (UK-specific)
Green tariffs can be competitively priced, but the details matter. These are the most common reasons people end up disappointed after switching.
Standing charge differences
A lower unit rate can be offset by a higher standing charge—especially if you use less electricity (e.g. small flat, long working hours away).
Exit fees on fixed tariffs
Some fixed deals include exit fees. Factor this into your decision and check if there are exceptions (terms vary by supplier).
Payment method restrictions
The best prices often assume monthly Direct Debit. If you pay on receipt of bill or by prepayment, available tariffs and prices may differ.
Smart meter / tariff compatibility
Time-of-use tariffs usually need a working smart meter communicating correctly. If your smart meter isn’t sending readings, you may be moved to standard rates.
Two realistic scenarios (with numbers)
These examples are illustrative to show how tariffs can compare. They are not a prediction of your bill.
Scenario A: Low-to-medium usage flat (single-rate)
- Assumptions
- Electricity use: 2,000 kWh/year. Region: illustrative UK average. Payment: Direct Debit. No exit fee considered.
- Tariff 1 (standard):
- Unit rate 24.0p/kWh, standing charge 55p/day.
- Tariff 2 (green):
- Unit rate 23.0p/kWh, standing charge 62p/day.
- Estimated annual cost comparison
- Tariff 1: (2,000×£0.24) + (365×£0.55) ≈ £681
Tariff 2: (2,000×£0.23) + (365×£0.62) ≈ £686
Even with a lower unit rate, a higher standing charge can make the green tariff slightly more expensive for lower usage.
Scenario B: Family home with higher usage (single-rate)
- Assumptions
- Electricity use: 4,200 kWh/year. Payment: Direct Debit. No discounts or extras included.
- Tariff 1 (standard):
- Unit rate 25.0p/kWh, standing charge 55p/day.
- Tariff 2 (green):
- Unit rate 23.5p/kWh, standing charge 58p/day.
- Estimated annual cost comparison
- Tariff 1: (4,200×£0.25) + (365×£0.55) ≈ £1,251
Tariff 2: (4,200×£0.235) + (365×£0.58) ≈ £1,200
For higher usage, a better unit rate can outweigh a slightly higher standing charge.
Common switching pitfalls (and how to avoid them)
- Address mismatch: use the exact address format as your current supplier/bill to reduce delays.
- Wrong meter type: confirm if you’re single-rate, Economy 7, or have a smart meter.
- Estimated readings: take a meter reading on switch day if you can (or check smart readings are up to date).
- Confusing “green gas” claims: read what’s included—biomethane, offsets, or contributions.
- Assuming “100% renewable” means 24/7 renewables: the grid mix changes through the day; claims are typically matched over time using certificates and reporting.
Good to know: If you rent, you can usually switch energy supplier as long as you’re responsible for paying the bills. If bills are included in rent or managed by a landlord, you may not be able to switch.
Reminder: Prices can change, and availability depends on where you live (network area), how you pay, and your meter. Always review the full tariff information before agreeing to switch.
FAQs: switching to a green electricity tariff (UK)
Will I get a power cut when I switch?
No—switching supplier is an administrative change. Your electricity still comes through the same network.
How long does switching take in the UK?
Often around 5 working days, but it can take longer if there are data issues (e.g. address, meter details) or if prepayment/debt needs resolving.
What does “100% renewable electricity” mean?
Usually it means the supplier matches customer electricity with renewable generation evidence (commonly REGOs). It doesn’t mean your home is physically supplied only by renewables at every moment.
Can I switch to a green tariff with a prepayment meter?
Sometimes, yes—but tariff choice can be limited. If you owe money to your current supplier, switching can be restricted or handled under specific rules. Check your current balance and supplier terms.
Will a green tariff work with Economy 7 or multi-rate meters?
Only if the tariff supports your meter setup (day/night or multiple registers). When comparing, make sure prices are shown for each rate and that the supplier confirms compatibility.
Do I need a smart meter for green electricity?
No. Many green tariffs are standard single-rate tariffs. However, time-of-use or smart tariffs typically need a communicating smart meter to bill accurately.
Can I keep my current supplier and go greener?
Possibly. Some suppliers offer green variants or add-ons. Compare the full cost versus switching—especially standing charges and any contract end/exit fees.
How can I spot greenwashing on a tariff?
Look for clear statements on how the supplier backs claims (e.g. REGOs, direct sourcing), whether it publishes an audited fuel mix, and whether any “contribution” is explained with measurable reporting.
If you’re unsure: use the quote form above and note “Economy 7”, “prepayment”, or “smart time-of-use” in any follow-up. Getting the meter/payment details right is the fastest way to avoid switching issues.
Trust, methodology and sources
Page details
- Written by: EnergyPlus Editorial Team
- Reviewed by: Energy Specialist
- Last updated: May 2026
How we assess green electricity tariffs
We focus on what changes the customer experience and outcomes in the UK market. When we say “compare”, we mean comparing tariffs using household inputs and supplier terms available at the time of quoting.
- What we consider
- Estimated annual cost (unit rate + standing charge), payment method, meter type (single-rate, Economy 7, smart), contract length and exit fees, and the supplier’s green claim transparency (e.g. REGOs, reporting, sourcing statements).
- Assumptions used in the scenarios above
- We used example unit rates and standing charges to demonstrate how bills are calculated. We assumed a full year of consumption and a constant daily standing charge for simplicity.
- Limitations
- Tariffs and terms can change. Your actual bills will depend on usage patterns, regional network costs, meter readings, VAT rules for domestic energy, and any supplier changes (e.g. price changes on variable tariffs). Green claims may be defined differently by suppliers; check the tariff’s documents for current wording.
Helpful UK sources (independent)
- Ofgem (UK energy regulator) — guidance on switching, consumer rights and market rules.
- Citizens Advice: energy — help if you’re struggling to switch or have a billing dispute.
- GOV.UK — official government information, including cost of living and energy-related support pages (availability varies by scheme and time).
We aim to keep this page current, but always check supplier tariff documents (prices, exit fees, eligibility) before agreeing to switch.
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