Cheapest Fixed Energy Tariff Beating the May 2026 Price Cap (UK)

There's no single "cheapest" fix for every UK home

The headline £1,641 cap applies to typical usage on SVT — but the cheapest fix for your home depends on:

• Your distribution region (one of 14 across GB).
• Your annual usage in kWh — both gas and electricity.
• Your meter type (single-rate, Economy 7, prepayment, smart).
• Your payment method (direct debit, cash/cheque, prepayment).

Two homes with identical bills in April can have different "cheapest" fixes — same with two homes a few hundred metres apart in different postcode areas.

Typical sub-cap pricing in early May 2026

For a typical 2,700 kWh electricity / 11,500 kWh gas home on direct debit:

• Best 12-month fixed dual-fuel: commonly £1,535–£1,580/year (3–6% below cap).
• Best 24-month fixed dual-fuel: commonly £1,560–£1,620/year (slightly less aggressive, reflecting longer-dated risk).
• Best fix-and-fall tariffs (cap-tracking with floor): variable, but commonly priced near cap with downside protection.

For low-usage homes (under 1,800 kWh elec), the absolute saving is smaller but the percentage-below-cap can actually be higher with the right tariff.

What "sub-cap" actually means

A sub-cap fixed tariff is one priced below the regulated cap level for your region. The cap caps unit rates and standing charges separately, so a tariff can be sub-cap on:

• Unit rates only (most common — saves heavy users more).
• Standing charge only (rarer — saves low users more).
• Both (best — saves all usage profiles).

The cheapest fix in absolute £/year terms depends on your specific usage. Don't pick on headline alone — pick on total annual cost for your usage.

Three checks before signing

1. Exit fees. A £75 exit fee on a £60/year saving is a bad trade. Prefer no-exit-fee where similarly priced.
2. Tie-in length. A 24m fix locks rates for two years. If you'd consider moving house or upgrading to a heat pump in that window, a 12m fix is safer.
3. Tariff type. "Fix and fall" deals only fall if the cap drops materially — they don't beat normal fixes if the market is stable.

How to actually find the cheapest sub-cap fix

Two-minute version:

1. Get your annual kWh from supplier app.
2. Compare for your postcode using a whole-of-market tool.
3. Filter for fixed tariffs only.
4. Sort by total annual cost for your usage.
5. Pick the top deal that has acceptable exit fees and tie-in length.

Most households complete this in under five minutes. The hard part is having accurate kWh — guess and the comparison is roughly right but not precisely so.

Frequently Asked Questions

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Compare gas and electricity tariffs across the whole UK market for your postcode and meter type.

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Information is for general guidance based on Ofgem published cap data and supplier pricing as of early May 2026. Specific rates depend on your postcode, meter type and tariff terms. Always check the latest tariff details before switching. EnergyPlus is an independent comparison service.