What is the energy price cap?

Ofgem's cap limits the unit rates and standing charges a supplier can charge on standard variable tariffs — not your total bill. It's recalculated every three months (January, April, July, October), so your variable price changes quarterly. Roughly two-thirds of UK households sit on capped variable tariffs.

Is fixing cheaper than the price cap?

In mid-2026, the best fixed deals price around 5–10% below the current cap for a typical household. Whether that saves money over a year depends on where the cap goes next — a fix locks your rate while the cap moves quarterly, in either direction.

Can I leave a fixed energy deal early?

Usually with exit fees of £25–75 per fuel, though some fixes have none — and Ofgem rules waive exit fees in the final 49 days of a fix. Check the fee before signing; a no-exit-fee fix below the cap is close to a free option.

When is the next price cap announcement?

Ofgem announces each quarter's cap about five weeks ahead — the October 2026 cap is announced around 26 August 2026. The announcement week is the best-informed moment each quarter to compare fixes against the known next cap.

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Should you fix your energy price in 2026? How to decide

By the team behind the Energy Switch Checker. Updated 18 August 2026.

"Should I fix?" is the most-asked question in UK energy, and most answers are either hedge-everything mush or a sales pitch for whatever pays best. Here's the actual decision, as arithmetic.

How the cap really works

If you've "never switched," you're on a standard variable tariff limited by Ofgem's price cap — recalculated every January, April, July and October. Crucially, the cap limits unit rates, not your bill: use more, pay more. And it moves: the cap is a quarterly repricing of wholesale energy, in whichever direction wholesale went. Sitting on the cap means your price changes four times a year without you doing anything.

The fix decision, honestly

A fixed deal swaps that quarterly uncertainty for a locked rate, usually for 12 months. The decision is a comparison between two numbers, one known and one guessed: the fix's rate (known) versus the average of the next four caps (guessed). In August 2026, decent fixes sit roughly 5–10% below the current cap. If the cap stays flat or rises, those fixes win. If wholesale falls hard and the cap drops below your fix, you lose the difference — minus whatever exit fee stands between you and leaving.

Three things tilt the odds in your favour. One: prefer fixes with low or no exit fees — a no-exit-fee fix below the cap is nearly a free option (if the cap falls below it, walk). Two: decide in announcement week. Ofgem publishes each cap ~5 weeks early (next: ~26 August for October), so for a few weeks each quarter you're comparing against a known next cap rather than a guess. Three: ignore "saves £X vs the cap" adverts priced against the outgoing cap — that number expires with the quarter.

Who shouldn't fix

Very low users (the standing charge dominates, rate differences barely matter), anyone moving house imminently (unless the fix ports), and anyone whose fix quotes are above the current cap — which happens, and no, don't.

Where do you stand? The Energy Switch Checker compares your monthly spend against your region's actual cap rates and shows the current best fixes — with the cap-change dates flagged, so you decide with the freshest numbers.

This is factual information and arithmetic, not financial advice — energy pricing depends on your usage, region and tariff. Rates from Ofgem's published cap figures; fixes change weekly. Supplier links are affiliate links; the best option always ranks first even when it pays us less, or nothing.