The price cap just rose 13% — should you fix your energy tariff?

On 1 July the Ofgem price cap rose 13%, taking a typical dual-fuel direct-debit household to £1,663 a year. The rise is driven by wholesale gas prices, and it lands three months before heating season starts. So the question in every money forum this week: should you fix?

Honest answer: it depends on one thing you can check in ten minutes, and one thing nobody knows. Let’s separate them.

First: does the rise even affect you?

The cap only applies to standard variable tariffs. Around 22 million accounts — about 40% — are on fixed deals and felt nothing on 1 July. If you fixed in the last year, this rise isn’t your problem (though it’s worth noting what your fix ends into).

If you’re on a variable tariff — and most households are — you’re now paying up to the new capped rates: about 26.1p/kWh for electricity and 7.3p/kWh for gas, plus roughly £315 a year in standing charges before you use a single unit.

What the cap actually is (worth 20 seconds)

A common misreading: the cap is not a limit on your bill. It caps the rates — the £1,663 figure is just what a “typical” household pays at those rates. Use more, pay more; use less, pay less. That distinction matters later.

The fix-or-wait decision, honestly

The case for fixing now: fixed deals priced below the current cap exist — since the cap era began they come and go, and switching to the right one typically saves £50–200 a year against capped rates. Just as valuable with winter ahead: certainty. A fix means the October cap announcement is someone else’s drama.

The case for waiting: the cap resets every three months — the next change lands 1 October, announced in late August. If wholesale gas falls back, the cap falls and variable customers ride it down while fixed customers watch. That’s the genuine trade: a fix insures you against October; staying variable keeps the upside if things improve.

What nobody can tell you: which way October goes. Anyone confidently predicting the next cap is selling something. So make the decision on maths you can check:

1. Compare against today’s capped rates — unit rates and standing charge, not the headline £1,663. A “deal” with a low unit rate and a fat standing charge can lose. Compare via an Ofgem-accredited switching site or Citizens Advice.
2. Check the exit fees. A fix that beats the cap and has low or no exit fees is close to a free option: if prices tumble, you pay a small toll and leave. That asymmetry is what makes a good fix attractive even in uncertainty.
3. Never fix above the current cap for “certainty” alone — that’s paying insurance premiums on a house that isn’t on fire.
4. Shiftable load? If you can run the washing, dishwasher or an EV overnight, an Economy 7 or EV tariff (night rates roughly 7–13p) can beat a standard fix entirely.

As a feel for the stakes: on typical usage, a fix priced 5% below the current cap is worth about £85 a year — real, but modest. Which is exactly why the second half of this article matters more than the first.

The bigger lever the cap debate hides

Here’s the thing the fix-or-wait argument quietly concedes: whichever tariff wins, it moves your bill by tens of pounds. Your usage moves it by hundreds — and it’s the only part you fully control.

The £315 of standing charges is fixed. Everything above it is consumption (here’s what normal consumption looks like for your home size), and in a UK home that’s dominated by heating. The cheapest fixes are free: most combi boilers leave the factory with the flow temperature set hotter than the house needs — turning it down costs nothing and trims gas use all winter. Then draught-proofing, then the hot water settings. July-to-September is precisely the window to sort this, calmly, before the boiler goes back on.

That’s the whole premise of our UK guide: every fix priced in pounds, with honest paybacks — including the upgrades we tell you to skip.

The verdict

• Fixed already? Relax; diarise the end date so you don’t lapse onto variable.
• On variable? Spend the ten minutes: if a fix beats today’s capped rates with low exit fees, taking it before winter is a reasonable, defensible move. If nothing beats the cap this week, check again after the late-August announcement.
• Either way, the tariff is the small lever. If you want to know whether your usage itself is the problem, see how your bill compares — it works for UK bills, gas in kWh and all.

Cap figures: Ofgem, 1 July–30 September 2026 (typical dual-fuel direct debit). Switching-saving range, Economy 7 rates and boiler guidance: sourced assumptions from the Decode Energy Home Energy Saving Guide (UK 2026 edition). The 5% worked example is illustrative — compare real quotes against your own usage.