EnergyPlus · May 2026

Cheapest pay-as-you-go (PAYG) electricity UK 2026 — June 2026 update

Pay-as-you-go (PAYG) electricity customers in the UK have been on a fairer deal since April 2024, when Ofgem aligned the prepayment cap just below the default tariff cap. In May 2026 that protection continues under the April–June 2026 prepayment cap, smart-PAYG is now the cheapest way to top up, and more suppliers offer proper app-based experiences. This page covers the cheapest PAYG electricity in May 2026 and how to switch.

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Editorial information, not financial advice. Prices and policy can change — always confirm against the supplier and Ofgem.

Cheapest PAYG electricity — June 2026 at a glance

Prepayment customers in May 2026 pay the April–June 2026 prepayment cap unit rate and standing charge — set just below the default tariff cap. The cheapest PAYG products are smart-PAYG variants from Octopus, British Gas, EDF, OVO and ScottishPower, which give app-based top-ups, real-time balance and instant emergency credit. Switching PAYG supplier takes 5 working days under Faster Switching.

Quick checklist (May 2026):

  • April–June 2026 prepayment cap unit rate sits just below the default cap.
  • Smart-PAYG (SMETS2 in prepay mode) is now the cheapest, best-experience option.
  • Debt Assignment Protocol lets you switch with up to £500 of debt per fuel.
  • Friendly-hours protection and emergency credit continue under Ofgem rules.
Last updated
May 2026
Reviewed by
Energy Specialist
Audience
UK households & small businesses

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Annual kWh

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Meter type

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Postcode & region

Standing charges and tariff availability vary by network region.

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Cheapest UK PAYG electricity tariffs in June 2026

A clear, current overview to help you choose with confidence.

What you'll actually pay

The April–June 2026 prepayment cap sets the maximum unit rate and standing charge a PAYG supplier can charge. The cap is region-specific and refreshed every three months. The July–September 2026 figure is announced by Ofgem in late May.

Smart-PAYG vs key meter

Smart-PAYG (SMETS2 in prepayment mode) lets you top up by app, see your balance in real time and use emergency credit instantly. Legacy key/card meters still work but require physical top-up points and have slower fault recovery.

Switching supplier on PAYG

You can switch PAYG supplier in 5 working days under Faster Switching. The Debt Assignment Protocol lets you carry debt up to £500 per fuel to the new supplier; above that you'll usually need to clear the debt first.

Protections you keep

Emergency credit (typically £5–£10), friendly-hours protection (no disconnection at night, weekends or bank holidays) and the Priority Services Register continue under Ofgem rules for vulnerable PAYG customers.

Compare like-for-like

Indicative May 2026 PAYG electricity comparison. Your actual rate depends on your network region — use the form for postcode-specific quotes.

What to compare Typical range (May 2026) Notes
Default tariff cap (Apr–Jun 2026) Reference Maximum on credit-meter standard variable tariffs.
Prepayment cap (Apr–Jun 2026) Just below default cap Maximum on PAYG — set quarterly by Ofgem.
Smart PAYG (Octopus, BG, EDF, OVO, ScottishPower) At or just under prepay cap App top-ups, real-time balance, instant emergency credit.
Legacy key/card meter At prepay cap Physical top-up locations only — slower fault recovery.
Direct-debit credit meter Up to ~6% below default cap on a fix Cheaper if you can budget DD and pass a credit check.

How to find the cheapest PAYG electricity tariff (June 2026)

  1. 1. Check your current top-up rate

    Look at your meter, in-home display or app for unit rate and standing charge — compare against the May 2026 prepayment cap for your region.

  2. 2. Ask about a smart-PAYG upgrade

    Your supplier installs SMETS2 in prepayment mode for free. Smart-PAYG unlocks the best PAYG products and removes physical top-up trips.

  3. 3. Get whole-of-market PAYG quotes

    Use the form on this page to surface PAYG options across suppliers for your postcode.

  4. 4. Check debt position

    Up to £500 per fuel can be transferred under the Debt Assignment Protocol. Above that, talk to your current supplier first.

  5. 5. Compare like-for-like

    Annual cost = unit rate × kWh + standing charge × 365. Compare PAYG smart vs PAYG legacy vs credit-meter DD if you have the option.

  6. 6. Apply and submit a meter read

    Switch completes in 5 working days. Submit an opening read on day one to keep billing clean.

Common pitfalls to avoid

The most frequent issues we see when households and businesses act on what looks like a good deal.

  • Topping up only what you can afford this week — self-disconnection is a real risk in colder months.
  • Not registering with the Priority Services Register if eligible — it's free and adds protections.
  • Assuming PAYG is always cheapest — credit-meter direct-debit fixes usually beat PAYG on annual cost.
  • Ignoring smart-PAYG upgrades — both the experience and the tariff range are genuinely better.

Frequently asked questions

What's the cheapest PAYG electricity in June 2026?

Smart-PAYG variants from Octopus, British Gas, EDF, OVO and ScottishPower are priced at or just below the April–June 2026 prepayment cap, which itself sits below the default tariff cap. The cheapest tariff for your home depends on network region — use the form to compare by postcode.

What is the prepayment electricity cap in June 2026?

The April–June 2026 prepayment cap is in force throughout May. It sets the maximum unit rate and standing charge a supplier can charge PAYG customers and is refreshed every three months. The July–September 2026 cap is announced by Ofgem in late May.

Can I switch PAYG electricity supplier in June 2026?

Yes — switching takes 5 working days under the Faster Switching guarantee. If you owe up to £500 per fuel to your current supplier, the Debt Assignment Protocol lets the debt be carried to the new supplier.

Is smart-PAYG cheaper than a key meter?

Pricing is set by the same prepayment cap, but smart-PAYG tariffs often sit a fraction below cap and the experience is significantly better — app top-ups, real-time balance and instant emergency credit instead of physical PayPoint trips.

Can I switch from PAYG to a credit meter?

Yes. If you can budget a fixed monthly direct debit and pass a soft credit check, your supplier will switch your meter mode (smart) or replace the meter (legacy). Direct-debit credit-meter tariffs usually save £80–£200 a year over PAYG.

What is emergency credit on a prepay meter?

Most suppliers give £5–£10 of emergency credit when your balance runs out, which is repaid from your next top-up. Friendly-hours protection means you won't be cut off at night, on Sundays or bank holidays.

Does the no-standing-charge mandate apply to PAYG?

Yes — Ofgem's April 2026 rule requires every default-tariff supplier to offer a zero-standing-charge variant, and that applies on PAYG too. The trade-off is a higher unit rate, so it only saves money for very low-usage households.

Which is the cheapest PAYG supplier for my postcode?

Use the form on this page — it surfaces PAYG tariffs from across the market for your postcode and meter, including smart-PAYG variants and any sub-cap fixes available.

Trust, methodology and sources

Page governance

Reviewed by
Energy Specialist
Last updated
May 2026

How we keep this page current

We refresh this page each month against the latest Ofgem cap, supplier tariff changes and current scheme guidance. Worked numbers are illustrative; quotes you receive via the comparison form are personalised to your meter and postcode.

Editorial independence: our priority is clarity and like-for-like comparison. Where commercial relationships exist, options are still presented on suitability and the information available at the time.

Reputable UK sources we reference

If you spot anything that looks out of date (a rule change, a new scheme), please contact EnergyPlus so we can review and update this page.

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Updated on 10 Jun 2026