Cheapest UK energy supplier after the July 2026 price cap

Ofgem confirms the Q3 2026 default tariff cap on 27 May 2026 (effective 1 July – 30 September 2026). Here is how to pick the cheapest supplier the day it lands, and the 12-month fixes already priced below the expected July level.

  • What the July 2026 cap is forecast to be (Cornwall Insight central case)
  • Fixes already cheaper than the forecast cap — list updated for May 2026
  • Region-by-region: where switching saves the most this summer
Get a free quote Fixes vs July cap

Cap and tariff figures are estimates for typical direct-debit dual-fuel households at TDCV consumption. Actual bills vary by region, payment method and usage.

Fast answer (May 2026)

Cornwall Insight's mid-May 2026 forecast points to the July 2026 Ofgem cap falling by roughly 2–4% versus the April 2026 cap — that is a typical dual-fuel annual bill of about £1,705–£1,735 on direct debit at standard household use (TDCV). Final figure is confirmed on 27 May 2026.

As of late May 2026, several 12-month fixes are already 3–8% below the expected July cap, including products from Outfox the Market, EDF, E.ON Next, So Energy and Octopus Energy. If you are on a capped variable today, a competitive fix is usually the cheapest deal across the next 12 months — even if the cap dips for one quarter.

For Economy 7 / multi-rate homes, the relative ranking is unchanged: single-rate fixes look strongest for evening-heaters, Octopus and OVO multi-rate fixes for storage-heating homes.

Fixes already cheaper than the forecast July 2026 cap

Indicative typical-use annual cost (dual fuel, direct debit, GB average). Live availability and pricing vary by region and postcode — confirm via a quote.

Supplier / tariff Length Est. annual cost vs forecast July cap
Outfox the Market — Fix'd Dual May 26 v3.012m~£1,612~6% below
E.ON Next — Pledge Fixed 12m12m~£1,628~5% below
EDF — Essentials Fixed 1Yr May 2612m~£1,649~4% below
So Energy — So Bluebell One Year12m~£1,651~4% below
Octopus Energy — 12M Fixed May 2612m~£1,668~3% below
British Gas — Fixed Tariff v3412m~£1,682~2% below
OVO Energy — Fixed Easy Save12m~£1,684~2% below

Cap-tracker variable tariffs (Octopus Tracker, EDF Ensure) and time-of-use products (Agile, Cosy) are not in this table — they can be cheaper than any fix but carry different risk.

Find your cheapest supplier in under a minute

We compare whole-of-market fixes against the forecast July 2026 cap rate for your region. No need to know your unit rates — we will pull regional pricing from your postcode.

  • Whole-of-market panel including the names above and challenger suppliers
  • Tariffs filtered to those genuinely available in your region today
  • No obligation to switch

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Region-by-region: where switching saves most this summer

The Q3 2026 cap, like every cap, sets different unit rates and standing charges for each of the 14 GB regions. Households in the North West, Merseyside & North Wales, and Northern Scotland tend to pay the highest standard prices, and so usually see the largest cash savings from switching to a competitive fix.

Biggest expected savings

North West, Merseyside & North Wales, Northern Scotland — typically £90–£140/yr off a 12-month fix versus the July cap.

Mid-range savings

Yorkshire, East Midlands, West Midlands, South Wales — typically £60–£100/yr.

Smaller (but still real) savings

London, Southern, South East — typically £40–£80/yr; standing charge gap is narrower.

Figures use Cornwall Insight's central forecast and a TDCV household. Actual savings depend on your consumption, payment method and whether you switch single fuel or dual fuel.

Common pitfalls when switching around a cap change

Anchoring to one quarter

The July cap covers only July–September. A 12-month fix needs to beat the average over four quarters, not just one.

Headline unit rate

Always compare on total annual cost — a low unit rate paired with a high standing charge can be worse than the cap for low users.

Exit fees

Mid-contract switches often incur £25–£75 per fuel. Suppliers must let you leave fee-free in the last 49 days of your fix.

Conditional cashback

Some sub-cap fixes only beat the cap once cashback is included; read the small print on when and how it pays out.

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FAQs — July 2026 cap and switching

Ofgem confirms the Q3 cap on 27 May 2026. It takes effect 1 July and runs until 30 September 2026.
Not necessarily. Sub-cap fixes have been re-priced as the forecast firmed up in mid-May. If a 12-month fix is already 3% or more below the forecast July cap for your region, the day-of-announcement deals are unlikely to improve dramatically. If you are on a cheap fix already, do nothing.
Most analysts expect the October 2026 cap to rise modestly as winter wholesale costs feed through. That is part of why 12-month fixes can win against the Q3 cap dip.
No. Ofgem sets the cap by region, so prices vary across the 14 GB electricity regions and across gas distribution zones. The headline "£1,720" figure people quote is a GB average for a TDCV household.
Trackers like Octopus Tracker and EDF Ensure expose you to wholesale moves; they have beaten the cap on average since launch but carry seasonal risk. Best for cost-flexible households comfortable with monthly variation.
Yes — Ofgem sets a separate prepayment cap, broadly aligned with direct debit since the 2023 levelling. Prepayment customers should still compare suppliers; some offer specific PPM fixes.
The 2021–22 wave of failures has eased thanks to Ofgem's stricter financial resilience rules. Your credit balance is still protected by the Supplier of Last Resort scheme regardless of which licenced supplier you choose.

How we assess this

Last updated
May 2026

Cap forecasts use Cornwall Insight's public central case as of 14 May 2026. Tariff data reflects live products visible to our switching panel on 23 May 2026; availability is regional and changes daily.

Sources

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Updated on 16 Jun 2026