EnergyPlus · May 2026

Switching energy providers: UK guide (May 2026)

Switching energy provider in the UK is faster and more reliable than ever in May 2026, thanks to the Faster Switching guarantee that completes most switches in 5 working days. With the April–June 2026 Ofgem cap in force and several no-exit-fee 12-month fixes priced below cap, this month is a particularly good time to compare. This page walks through how switching works, what to watch for and how to lock in a better deal.

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

Switching energy providers — May 2026 essentials

Switching completes in 5 working days under the Faster Switching guarantee, costs nothing, and doesn't interrupt supply. You can compare tariffs across the whole market — default cap, fixed, tracker, off-peak — from one form. Exit fees on your current fix (if any) and any small dual-fuel discount on your current deal are the main things to weigh.

Quick checklist (May 2026):

  • 5 working days from application to live tariff under Faster Switching.
  • Switching is free — no fee from either supplier.
  • You don't lose supply at any point during the switch.
  • 14-day cooling-off period from the day you apply.
Last updated
May 2026
Reviewed by
Energy Specialist
Audience
UK households & small businesses

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What we’ll do with your details: request and present supplier quotes, and contact you about your comparison. You can ask us to stop at any time.

What changes your quote most

Annual kWh

Drives the unit-rate portion of your bill.

Meter type

Single-rate, Economy 7/10, smart, half-hourly all price differently.

Postcode & region

Standing charges and tariff availability vary by network region.

Term & start date

Fixes of 12/18/24/36 months trade certainty for flexibility.

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Tip: Your MPAN (and MPRN for gas) helps suppliers price more accurately. Both are on a recent bill.

Switching energy providers in the UK (May 2026)

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

Why switch in May 2026

Cheapest 12-month fixes sit roughly 2–6% below the April–June 2026 cap on typical use. If you've been on a default tariff since the cap returned, switching almost always cuts annual cost.

Smart meter unlocks more tariffs

SMETS2 smart meters open access to tracker tariffs, time-of-use tariffs and the cheapest EV/off-peak rates. Installation is free from your current supplier.

Prepayment customers can switch too

Under the Debt Assignment Protocol, prepay customers with up to £500 of debt per fuel can switch supplier. Smart PAYG (SMETS2 in prepay mode) opens up the best PAYG tariffs.

Faster Switching protections

If a switch takes longer than 5 working days or there's an erroneous transfer, Ofgem's switching guarantee requires the supplier to pay compensation. Keep your application reference — it makes any compensation claim straightforward.

Compare like-for-like

Indicative product types and where they sit in May 2026. Use the form on this page for personalised quotes.

What to compare Typical range (May 2026) Notes
Default tariff cap (Apr–Jun 2026) Reference point Maximum standard variable rate.
12-month fixed with exit fee ~2–6% below cap Best price if you'll stay for the term.
12-month no-exit-fee fix At cap to ~2% below Flexibility for renters and movers.
Tracker tariff Below cap most days Variable; SMETS2 required.
Time-of-use / EV tariff Cheapest overnight unit rate SMETS2 + smart appliances or EV.
Prepayment (PAYG) Below default cap Smart PAYG unlocks the best deals.

How to switch energy providers in the UK (May 2026)

  1. 1. Gather your details

    Postcode, full address, current supplier name and tariff, annual kWh (from a bill), meter type.

  2. 2. Check your current fix end date

    Within 49 days of the end of a fix, exit fees don't apply. Outside that window, weigh the exit fee against the new fix saving.

  3. 3. Run a whole-of-market comparison

    Use the form on this page to pull tariffs from across the market for your postcode.

  4. 4. Pick a tariff

    Compare annual cost (unit rate + standing charge), not just headline unit rate. Decide between fix, no-exit-fee fix, tracker or off-peak.

  5. 5. Apply

    The new supplier handles paperwork end-to-end. You don't need to contact your current supplier.

  6. 6. Submit opening meter reads

    On switch day, submit a meter read — keeps the final bill clean and prevents back-billing disputes.

Common pitfalls to avoid

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

  • Switching out of a fix early and triggering an exit fee — check the fee against the saving over the new fix's term.
  • Forgetting to submit an opening meter read — it prevents back-billing disputes.
  • Not telling the new supplier you're on the Priority Services Register — each supplier maintains its own register.
  • Picking the lowest unit rate without checking standing charge — annual cost is what matters.

Frequently asked questions

How long does switching take in May 2026?

Five working days under the Faster Switching guarantee, from application to live tariff with the new supplier. You don't lose supply at any point and the meter doesn't change.

Does switching cost anything?

No. Switching is free — neither the current nor the new supplier charges a fee. If you're on a fixed tariff with an exit fee and you leave before it ends, the exit fee (usually £50–£75 per fuel) applies, but only then.

Will my supply be interrupted?

No — the physical supply is unchanged. Only the billing relationship changes. Your meter, cables and pipes stay exactly as they are.

Can I switch out of a fixed tariff?

Yes — you can switch any time. If you're more than 49 days from the end of your fix, an exit fee usually applies. Within the final 49 days, there's no exit fee under Ofgem rules.

Should I switch to a fix or stay on the cap?

In May 2026, cheapest 12-month fixes sit a few percent below the cap on typical use. A fix locks in savings but loses upside if the cap falls further. Use the form on this page to compare both for your usage.

Can I switch with a prepayment meter?

Yes. Under the Debt Assignment Protocol, prepay customers with up to £500 of debt per fuel can switch supplier and carry the debt across. Smart PAYG unlocks the best PAYG tariffs.

What happens with my final bill?

Your old supplier issues a final bill within 6 weeks of switch completion. Submit opening and closing meter reads to keep it accurate. Credit balances are refunded automatically.

Is there compensation if a switch goes wrong?

Yes — the Faster Switching guarantee includes Ofgem-required compensation if a switch takes longer than 5 working days, or if you're switched in error. Keep your application reference.

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 24 May 2026