EnergyPlus · May 2026

UK energy news: price cap, switching and tariff updates (May 2026)

We aggregate Ofgem updates, supplier moves and tariff launches so households can decide whether to stay, switch or fix. This May 2026 page is refreshed monthly and links to deeper guides on each topic.

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

Where UK energy stands in May 2026

Wholesale gas and power prices ended Q1 2026 below their 2022–2023 peaks but remain above pre-2021 norms. Ofgem reviews the default tariff cap each quarter, and fixed deals on the open market are increasingly priced below the cap for typical-usage homes that pay by direct debit. Whether you save by switching depends on your usage, meter type and how long you fix for.

Quick checklist (May 2026):

  • Ofgem sets the default tariff cap quarterly (Jan, Apr, Jul, Oct).
  • Most cheaper fixed deals on the market are now whole-of-market and require a comparison.
  • Exit fees, standing charges and unit rates can vary widely between two similarly priced deals — check the small print.
Last updated
May 2026
Reviewed by
Energy Specialist
Audience
UK households & small businesses

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Share a few details and we’ll match you to suppliers and tariffs that suit your home, meter and usage. The aim is to make quotes comparable — same term, same assumptions — so you can decide with confidence.

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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By submitting, you confirm this is for a UK home energy comparison. We’ll use your details to provide quotes and contact you about your comparison. You can opt out at any time.

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

What's moving the UK energy market in May 2026

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

Price cap: quarterly cycle continues

The April–June 2026 cap remains the reference point this month. Suppliers can — and do — price fixed deals above or below it, so the cap is a benchmark, not a ceiling on what you can pay or save.

Fixed deals widen the field

Whole-of-market fixed tariffs (12, 18 and 24 months) are widely available. Choose your term based on how confident you are about wholesale prices, not just the headline unit rate.

Standing charges in focus

Ofgem continues to review how standing charges are levied. Low-usage homes can benefit from tariffs that emphasise unit rates over a high daily charge.

Smart meter and time-of-use options

More tariffs now reward off-peak use (overnight, weekend, or specific windows). For EV drivers and households running storage heaters, the savings can be material when the meter and tariff are matched.

Compare like-for-like

These headline numbers help frame what "good value" looks like in May 2026. Always check the personalised quote rather than relying on national averages.

What to compare Typical range (May 2026) Notes
Default tariff cap (typical dual-fuel) Set quarterly by Ofgem Check the latest cap on Ofgem.gov.uk for current values.
Fixed-deal premium/discount vs cap Varies by term and supplier Most attractive fixes sit at or below the prevailing cap.
Exit fees on fixes £0–£75 per fuel typical Some no-exit-fee tariffs exist; check before signing.
Standing charge (electricity) Roughly 50–65p/day typical Higher in some regions; affects low-usage homes most.
Smart/time-of-use savings Most material with shifted usage Look at off-peak hours vs your actual routine.

How to compare UK energy tariffs in May 2026

  1. 1. Gather your last bill

    You'll need your annual kWh for gas and electricity, your meter type, your postcode and how you pay (e.g. monthly direct debit).

  2. 2. Decide your priority

    Lowest annual cost? Certainty (a fix)? Greener tariff? Smart-meter time-of-use savings? Your priority shapes which deals to shortlist.

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

    Use the form on this page to surface options matched to your postcode and meter.

  4. 4. Check the small print

    Look at the standing charge, unit rate, term length, exit fees and how renewal works.

  5. 5. Apply and submit a meter read

    Once you choose, your new supplier handles the switch. Submit an opening meter read 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.

  • Comparing only the unit rate and ignoring the standing charge.
  • Fixing for longer than you can keep the property or supplier.
  • Missing the renewal window and rolling onto a higher variable rate.
  • Switching from a sub-cap fixed deal to an in-the-headlines new tariff that, after exit fees, costs more.

Frequently asked questions

Is the Ofgem price cap going up or down in May 2026?

The cap is set quarterly. The April–June 2026 level applies in May 2026. Ofgem publishes the next cap announcement ahead of the July–September window — check Ofgem.gov.uk for the most recent figure for your meter type.

Is it better to fix now or stay on the cap?

It depends on your appetite for certainty and the deal on offer. If a 12-month fix is meaningfully below the prevailing cap and the exit fee is reasonable, it can lock in savings. If the fix is at or above the cap, the cap may be the lower-risk option for the next quarter.

What is the cheapest energy supplier in May 2026?

There is no single cheapest supplier in the UK — the right deal depends on your postcode, usage, meter type and how you pay. Use a whole-of-market comparison to see who is cheapest for your home today.

Why have my unit rates and standing charges both changed?

Ofgem reviews both elements as part of each cap update. The split between unit rate and standing charge can also vary between suppliers and tariffs, which is why a comparison should look at your estimated annual cost, not the rates in isolation.

Do smart meter tariffs save money?

They can, particularly if you can shift use to off-peak hours (overnight EV charging, dishwasher and washing overnight, storage heating). On a standard daytime pattern, savings may be modest.

Can I switch if I'm in debt to my current supplier?

If the debt is under 28 days old you can usually switch as normal. Older debt may need to be settled, or transferred under the Debt Assignment Protocol for prepayment customers — speak to your supplier first.

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 21 May 2026