The cap is confirmed. The strategy question is not.
Ofgem confirmed the October cap at £1,723 on 26 August, and a wave of cheapest-energy-deal tables followed within hours. Most rank tariffs purely by annual cost and tell readers to pick the top one. That approach is not wrong, but it skips a more useful question: why is the cheapest deal cheap, and why does it come from that particular supplier.
The answer is not random. Small challenger suppliers and larger legacy suppliers are running different plays this quarter, shaped by a regulation most switching guides do not mention. Understanding it shows which deal to trust, and what a household is trading off, more clearly than a league table alone.
Two plays, one event
The clearest illustration happened earlier this year, not this quarter, though the pattern is worth watching for as October unfolds. In January 2026, Uswitch ran its "Great Energy Saving Collective," a time-limited event open only to people already signed up to its marketing list. The event produced three winning tariffs instead of the usual single deal, one in each category.
| Category | Supplier | Saving vs cap |
|---|---|---|
| Nation's Cheapest Fix | Fuse Energy | -£266/year |
| Cheapest Big Supplier Deal | EDF Energy | -£185/year |
| Highly Rated Supplier Deal | Utility Warehouse | -£230/year |
Uswitch "Great Energy Saving Collective," January to February 2026, against that period's cap. Historical example, not a current live offer.
Same event, same comparison site: three suppliers made three different calculations about how cheap they could afford to go. That pattern is worth understanding before switching this quarter, not just which number is lowest today, but which strategy produced it.
Why Fuse can go broad and cheap
Fuse Energy launched in 2022 and is backed by around $120-160m in venture funding from investors including Balderton and Lowercarbon. It runs as an app-only supplier with no phone support and no prepayment meter option, and it has priced among the cheapest tariffs in the market through 2025 and 2026.
The reason it can do this openly, instead of through an exclusive, comes down to a regulation called the Ban on Acquisition Tariffs (BAT), which Ofgem introduced in April 2022. BAT requires suppliers to make any tariff available to existing customers on the same terms as new ones.
Ofgem consulted on removing BAT in October 2024 and signalled an intention to do so, then reversed course after pressure from consumer groups and suppliers. The rule remains in force through this quarter.
For Fuse, that requirement costs little. As a comparatively new entrant with a small existing customer base, extending its lowest advertised rate to everyone already on its books does not expose much revenue. It can publish an aggressive headline rate broadly and leave it there.
Why EDF and E.ON go narrow and exclusive instead
Larger legacy suppliers face the opposite arithmetic. EDF, E.ON and the other suppliers among the six largest carry millions of existing accounts, many sitting on higher-margin default or older fixed tariffs. Under BAT, publishing a Fuse-style headline rate across the whole market would make that entire back-book eligible to switch onto it immediately, a considerably larger hit to revenue than a small challenger ever risks.
The workaround is not a loophole in the legal sense. It is a different reading of what BAT restricts.
BAT bans discriminating between customers based on whether they are new or existing. It does not ban discriminating based on whether someone happens to be signed up to a particular comparison site's marketing list.
A time-limited exclusive run through Uswitch or MoneySuperMarket is available to new and existing EDF customers alike, so it satisfies BAT on its own terms. Bounding eligibility to subscribers of a specific site during a specific two-to-four-week window limits the practical audience and caps the exposure, without breaching the rule against new-versus-existing discrimination.
The small-supplier play
The strategy is broad, open and always on.
- Small back-book: extending the rate costs little
- Published openly, all the time, with no gatekeeping
- Trade-off: app-only service, thinner balance sheet
The big-supplier play
The strategy is narrow, exclusive and time-boxed.
- Large back-book: broad exposure would be costly
- Gated behind a specific comparison site's subscriber list
- Trade-off: the household has to catch the window
The nuance worth sitting with: this is not suppliers breaking the rules. MoneySuperMarket's own collective-switch terms cite the relevant provision, Standard Licence Condition 22B, noting that suppliers may group customers by objective criteria such as payment method, meter type or region, provided the criteria do not relate to new-versus-existing status. Comparison-site membership sits in a similar space.
BAT achieves its goal: no supplier can lock a discount to new customers only. It also leaves suppliers a legal, narrower channel that reproduces some of what acquisition tariffs used to do.
What this means for a household this quarter
There is no single right answer. It depends on what a household is optimising for.
A Fuse-type deal is available openly today, for a household comfortable with app-only service and no phone support.
Sign up to Uswitch and MoneySuperMarket alert lists for the next collective event to secure an established supplier at a real discount.
£1,723 is a reasonable fallback if switching hassle outweighs the saving for a given household right now.
Fixed deals reprice constantly. Our tariff tracker reflects what is available today, not last week.
The landscape as it stood in late August
Treat every figure below as a snapshot, not a live price. Several fixed deals that undercut the £1,663 previous cap were pulled or repriced within days of the 26 August October cap announcement, and further repricing is likely as suppliers digest the new cap level.
| Supplier | Type | Indicative annual cost | Snapshot |
|---|---|---|---|
| Fuse Energy | Fixed, 15 months | ~£1,448 | 5 Aug, East Midlands |
| Home Energy | Variable | ~£1,453 | 5 Aug, East Midlands |
| Outfox Energy | Fixed | -£165 vs cap | Mid-August tracker |
| EDF Energy | Essentials Plus, 12 months | ~£1,649 | July, no exit fees |
Indicative figures only, regional and time-stamped as shown. Actual quotes depend on postcode, meter type and payment method, so verify current pricing before switching.
The risk side of chasing cheapest
The trade-offs with challenger suppliers are almost always about service, not finance. Fuse has no phone support and no prepayment option. Smaller suppliers generally carry a shorter track record and thinner day-to-day infrastructure than the six largest suppliers.
Money held with a supplier is protected regardless of size. If a licensed UK supplier fails, as GivEnergy did in April 2026, Ofgem's Supplier of Last Resort (SoLR) process automatically transfers the account and any credit balance to a new supplier, with no gap in service. The customer is then free to switch away again.
The real question with a challenger supplier is not whether money is at risk if something goes wrong. It is whether app-only account management, with no phone line, suits the household.
Should a household wait for a collective?
Households that prefer an established name at a discount should sign up to Uswitch's and MoneySuperMarket's collective-switch alert lists. Both run these periodically, with Uswitch's "Great Energy Saving Collective" and MoneySuperMarket's "Super Switch" as their respective ongoing mechanisms, typically lasting two to four weeks each time.
Timing is not predictable or guaranteed for this quarter specifically. The clearest recent example ran in January and February 2026. Being already subscribed is the only way to be eligible when the next one lands.
SwitchInsights' take
This is, structurally, the same mechanism SwitchPilot's own batched tendering model uses: a bounded cohort is presented to competing suppliers to negotiate a rate none of them would publish broadly. The difference is what defines the cohort.
A comparison-site collective bounds it by who subscribed to a mailing list that month. A qualification-led model bounds it by attributes that matter to a supplier's cost to serve, such as smart meter status, credit profile and payment method: consistently a more durable basis for a good rate than timing a newsletter correctly.
Switching strategy: FAQ
What is the Ban on Acquisition Tariffs?
The Ban on Acquisition Tariffs (BAT) is an Ofgem rule introduced in April 2022. It requires suppliers to make any tariff available to existing customers on the same terms as new ones, ending the practice of cheap deals reserved for switchers only. Ofgem considered removing BAT in October 2024 but reversed course after pressure from consumer groups and suppliers, so it remains in force through the October 2026 cap window.
Is Fuse Energy cheap compared to the October 2026 price cap?
Fuse Energy has priced among the cheapest tariffs in the UK market through 2025 and 2026, consistently coming in below the Ofgem cap. It can do this because its existing customer base is small, so extending its lowest advertised rate to those existing customers under the Ban on Acquisition Tariffs costs relatively little revenue.
Fuse Energy vs EDF Energy: which is the better switch?
It depends on priorities. Fuse typically offers a lower headline rate but provides app-only account management with no phone support and no prepayment option. EDF is an established six-largest supplier with full call-centre support, though its best rates are often only available through short, comparison-site exclusives instead of being published openly.
How financially stable is Fuse Energy?
Fuse launched in 2022 and has raised significant venture funding, including from Balderton and Lowercarbon. Regardless of a supplier's size or funding position, Ofgem's Supplier of Last Resort process protects customer supply and any credit balance if a licensed supplier fails, as happened with GivEnergy in April 2026.
What is the Fuse Energy exit fee?
Exit fees on fixed tariffs, including Fuse's, typically run £50 to £150 depending on the specific deal and how much of the fixed term remains. Always confirm the current exit fee directly with the supplier before switching, since terms change between tariff versions.
How do I switch to a collective switch deal?
Sign up to a comparison site's marketing list, such as Uswitch or MoneySuperMarket, before a collective switch event opens, since eligibility is based on being subscribed. When an event runs, typically for two to four weeks, the exclusive tariffs appear in that site's comparison results and can be switched to like any other deal.
What happens if an energy supplier goes bust?
Ofgem appoints a replacement supplier through the Supplier of Last Resort process. Supply continues without interruption and any credit balance is protected and transferred automatically. GivEnergy's administration in April 2026 is a recent example of this process in action.