Best prepayment energy tariff rates in the UK this month
Compare prepayment (PAYG) electricity and gas tariffs across the whole market, with UK-specific checks for meter type, top-up method and eligibility. Get an estimated quote in minutes.
- See estimated prepayment unit rates and standing charges for your postcode
- Check options for smart PAYG, key/card meters and credit-to-PAYG switches
- Understand fees, eligibility and what “best” means under the Ofgem price cap
Estimates only. Prices vary by region, meter type and payment method. Availability and terms can change during the month.
Fast answer: what are the “best” prepayment tariff rates this month?
For most UK households on prepayment (PAYG), the best available rate in practice is usually a competitive price-capped variable tariff from a large or mid-size supplier, unless you can access a genuinely cheaper fixed deal in your region that supports your exact meter type (smart PAYG vs key/card) and top-up method.
Important: Prepayment prices vary by region and meter configuration. There isn’t one single UK-wide “best” unit rate. The right way to find your best option is to compare using your postcode and meter type.
Key takeaways
- Standing charges matter on PAYG (especially for low users), not just unit rates.
- Smart PAYG can unlock more tariff options than legacy key/card in some areas.
- Some “cheaper” deals have eligibility rules (online account, direct debit not required, but app-only top-up or smart meter required).
- Be careful with exit fees and price changes on variable tariffs.
What you’ll need to compare accurately
- Your postcode
- Sets your region and network charges (a major driver of price differences).
- Your meter type
- Smart PAYG vs key/card; single-rate vs Economy 7 (if electric-only heating).
- How you top up
- Shop top-ups, app, phone, or online—some tariffs limit methods.
Compare prepayment tariffs for your home
We’ll match you to tariffs that support prepayment and show estimated costs using your details. If you’re not sure what meter you have, that’s OK—choose your best guess and we’ll help you confirm it.
Tenants: You can usually switch energy supplier if you pay the bills, but check your tenancy agreement and ensure you don’t leave debt on the meter. If you’re in a managed building or district heating, switching may not apply.
Two realistic examples (with assumptions)
Scenario A: Low-use flat (electricity only, smart PAYG)
- Assumed use: 1,800 kWh/year electricity
- Assumed rates (example only): 26p/kWh unit rate + 55p/day standing charge
- Estimated annual cost: £468 usage + £200.75 standing = £668.75/year
Why it matters: for low use, a higher standing charge can outweigh a slightly lower unit rate.
Scenario B: Family home (dual fuel, key meter)
- Assumed use: 3,100 kWh/year electricity and 11,500 kWh/year gas
- Assumed rates (example only): Electricity 27p/kWh + 60p/day; Gas 7p/kWh + 32p/day
- Estimated annual cost: Elec £861 + £219 standing; Gas £805 + £117 standing = ~£2,002/year
Why it matters: dual fuel comparisons should look at both fuels together—one good rate can hide a poor one.
Assumptions: rates shown are illustrative to demonstrate how costs are built up (unit rate × kWh + standing charge × days). Your actual rates depend on region, meter type, and current tariff terms.
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Tell us a few details and we’ll show tariffs that fit prepayment meters in your area.
Already on prepayment because of debt? You can often still switch, but the rules depend on your balance and supplier. See the FAQs below for what to check first.
Compare prepayment tariff options (what to look for)
Prepayment tariffs can be competitive, but “best” depends on more than just the headline p/kWh. Use this table to compare like-for-like before you switch.
| Option | Usually suits | Watch-outs | What to check |
|---|---|---|---|
| Price-capped variable (PAYG) | Most households who want flexibility and broad eligibility | Rates can change when the cap updates; not always the cheapest month-to-month | Region, meter type, standing charge, customer service, topping up methods |
| Fixed tariff (PAYG eligible) | People who prefer budget certainty (if a genuinely good fix is available) | Exit fees; fixes can be higher than the cap; availability can be limited by meter type | Exit fee amount, end date, what happens after fix ends, PAYG support confirmed |
| Smart PAYG tariffs / app top-up | Households who want remote top-ups and better visibility of usage | Requires compatible smart meter setup; may be less suitable if you rely on cash top-ups | Top-up channels, emergency credit rules, in-home display info, support for gas + electric |
| Economy 7 PAYG (two-rate electricity) | Homes with storage heaters / overnight load that genuinely uses off-peak | Day rate often higher; if you don’t use off-peak, bills can rise | Off-peak hours in your area, day vs night split, heating/hot water setup |
Decision checklist: likely a good fit if…
- You know your meter type (or can confirm it quickly).
- You can top up in the way the tariff requires (shop/app/phone).
- You’ve checked the standing charge as well as the unit rate.
- You don’t have switch-blocking debt (or you know how it will be handled).
- You’re happy with the supplier’s support options for PAYG customers.
It may not suit if…
- You rely on cash-only top-ups but the tariff is app-only.
- You’re in temporary accommodation where bills are bundled.
- You have a complex metering setup (e.g. multiple meters) and need tailored advice.
- You cannot access the meter to swap a key/card or confirm readings.
Quick meter-type clues (non-technical)
- Key/card meter: you physically insert a key/card to add credit.
- Smart PAYG: you top up remotely, and the meter updates without inserting a key.
- Economy 7: your electricity has separate day and night rates (often shown as Rate 1 / Rate 2).
Costs, exclusions and common pitfalls (prepayment-specific)
Prepayment comparisons can go wrong when the tariff looks cheaper on unit rate alone. These are the most common issues we see for PAYG customers.
1) Standing charge shock
If you use little energy, a higher standing charge can make a “lower unit rate” tariff cost more overall. Always compare estimated annual cost, not just p/kWh.
2) Meter type mismatch
Some suppliers support smart PAYG but not legacy key/card (or vice versa). Confirm your prepayment setup before starting a switch to avoid delays.
3) Debt and repayment rates
If you’re repaying a balance through the meter, check how repayment is handled after switching. In some cases, debt can limit switching options.
Exit fees (fixed deals)
If a prepayment fixed tariff has an exit fee, factor it into the decision—especially if you might move home. Suppliers set fees and rules; they vary by tariff.
Top-up method limitations
Some tariffs push app-only or online-only top-ups. If you need PayPoint/Payzone or shop-based top-ups, filter tariffs accordingly.
Economy 7 misconceptions
Economy 7 only helps if you actually use enough electricity overnight. Ask for your current day/night split (or estimate it) before switching.
Emergency credit and friendly credit: rules and amounts vary by supplier and meter. If you depend on emergency credit, check the supplier’s PAYG support policy before switching.
Prepayment tariff FAQs
Are prepayment tariffs always more expensive than paying by Direct Debit?
Not always. Historically PAYG could cost more, but the gap can be smaller now and varies by supplier and region. The only reliable way to know is to compare estimated annual costs for your postcode and meter type.
Can I switch supplier if I’m on a prepayment meter?
In many cases, yes. Switching can be limited if there is debt on the meter above a supplier’s threshold or if the meter setup is complex. If you’re unsure, get a quote and we’ll highlight likely restrictions.
How do I know if I have smart prepayment or a key/card meter?
If you insert a physical key or card to add credit, it’s a key/card meter. If you top up in an app/online and the meter updates remotely (often alongside an in-home display), it’s typically smart PAYG. If you’re not sure, your supplier can confirm.
Will switching change how I top up?
It can. Some suppliers support shop top-ups (PayPoint/Payzone) for key/card, while others prefer app or online top-ups for smart PAYG. Check the tariff details so you don’t lose a top-up method you rely on.
What happens to my credit when I switch prepayment supplier?
It depends on the meter and supplier. You may need to use up existing credit before a meter exchange or transfer, or it may be carried across. Always keep top-up receipts and take meter readings where possible.
Do prepayment tariffs include the Ofgem price cap?
The price cap applies to standard variable tariffs (including many PAYG tariffs), but the cap is set at a typical-use level and your bill depends on usage. Fixed deals aren’t capped in the same way, so compare the actual unit rates and standing charges.
I’m a tenant—do I need my landlord’s permission to switch?
If you’re responsible for paying the energy bills, you can usually choose the supplier. However, your tenancy agreement may have requirements (for example, not leaving debts). If bills are included in rent, you typically can’t switch.
Can I move from prepayment to credit meter?
Sometimes. Suppliers may run a credit check, ask for a security deposit, or require any meter debt to be cleared first. If you’re on smart PAYG, switching mode may be easier than changing hardware, but it depends on supplier policy.
How we assess the best prepayment tariff rates (methodology)
What “best” means on this page
“Best” is not one national number. We treat a tariff as “best” for you when it offers a lower estimated annual cost for your region and meter type, without unsuitable restrictions (for example, needing a smart PAYG setup when you have a legacy key meter).
- Eligibility fit: prepayment supported, correct meter type, correct payment/top-up method
- Cost: unit rates + standing charges combined into an estimated annual figure
- Risk/terms: fixed vs variable, exit fees, contract length, what happens after the fix ends
- Practicality: support for PAYG customers, top-up channels, meter exchange requirements where stated
Assumptions & limitations (transparent)
- Estimates use the details you provide (postcode, meter type, and where available, typical usage). If usage is unknown, we may use a standard profile to illustrate costs.
- Tariff availability can change during the month; suppliers can pause deals or change rates.
- Network region matters: the same supplier can have different rates across Great Britain.
- Meter constraints: some switches require a meter exchange or smart setup; timelines vary.
- Debt and safety rules: customers repaying debt via PAYG may have extra restrictions not visible until account checks are made.
Editorial trust signals
- Written by
- EnergyPlus Editorial Team
- Reviewed by
- Energy Specialist
- Last updated
- April 2026
Sources we rely on
- Ofgem (UK energy regulator) guidance and price cap information
- Citizens Advice energy advice (switching, billing, complaints)
- GOV.UK energy support and consumer information
Note: Suppliers’ tariff terms and PAYG policies can differ and may change. Always confirm tariff details before completing a switch.
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