Cheapest gas tariff to switch to right now (UK, August 2026)

The July 2026 Ofgem price cap is now confirmed and rises 13% on 1 July, so a sub-cap 12-month gas fix is more valuable than it has been all year. Outfox the Market, So Energy, E.ON Next and Octopus all have gas fixes priced 3-7% below the current cap.

  • Top 6 gas-cheap fixes available in August 2026 (with annual cost estimates)
  • What the confirmed 1 July 2026 cap rise means for switchers
  • Gas-only vs dual-fuel: which actually wins in 2026
Get a free gas quote See the cheapest list

Indicative direct-debit pricing for typical-use households (9,500 kWh gas under the new July TDCV). Your actual price depends on your region, payment method and consumption.

Comparing UK home energy tariffs

Fast answer (August 2026)

The cheapest 12-month fixed deals on our live panel are typically priced below the £1,663 cap, several with no exit fees — run your postcode through the comparison on this page for today's exact prices.

The July 2026 cap is now confirmed: Ofgem set it at £1,663/yr on 27 May, a 13% rise from the April–June cap, effective 1 July — driven mostly by a ~24% jump in gas. With the cap going up, a 12-month gas fix that is 3% or more below the current cap locks in certainty across winter 2026/27.

If you have gas only (e.g. you've already gone solar + heat-pump for electricity), a single-fuel gas switch is straightforward; if you also need electricity, dual-fuel is usually cheaper than two separate single-fuel deals once standing charges are combined.

Cheapest gas-only fixes — August 2026

Supplier / tariff Unit (p/kWh) Standing (p/day) Est. annual
Outfox the Market — Gas Fix'd 12m~5.4~28~£750
So Energy — So Bluebell Gas 12m~5.5~29~£762
E.ON Next — Pledge Gas Fixed 12m~5.6~29~£775
Octopus Energy — 12M Gas Fixed~5.7~29~£786
EDF — Essentials Gas 1Yr~5.8~30~£797
OVO — Greener Gas Fix~5.9~30~£807

Indicative GB-average rates for typical use (Ofgem's new July TDCV is 9,500 kWh gas) — your postcode-specific price will differ.

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Gas-only vs dual-fuel in 2026 — which actually wins?

Suppliers usually price the cheapest fix for dual-fuel customers. The maths in August 2026 looks like this for a typical home (around 9,500 kWh gas + 2,500 kWh electricity on the new July TDCV, GB average):

  • The cheapest 12-month fixed deals on our live panel are typically priced below the £1,663 cap, several with no exit fees — run your postcode through the comparison on this page for today's exact prices.
  • Two single-fuel fixes (gas + electricity separately): ~£1,648/yr
  • Dual-fuel saves ~£36/yr on standing charges and combined billing.

Exception: if you have solar PV with net export contracts (SEG) and are loyal to your export supplier, splitting gas to a separate cheaper supplier can sometimes win — usually by £10–£30/yr, so worth a quick check.

Common pitfalls

Headline unit rate

5.4p sounds great until the standing charge is 32p/day. Compare on total annual cost.

Exit fees on your current fix

£25–£75 per fuel mid-term. Free to leave in the last 49 days.

Cashback conditions

Some sub-cap deals only beat the cap with cashback included. Read the payout terms.

Switching mid heating season

Submit a meter reading on the day of switch — final/opening reads avoid disputes on summer balances.

Gas switching FAQs (August 2026)

Yes, for most people. The cap rose 13% on 1 July, so any 12-month fix already priced 3% or more below the current cap now beats the current cap by an even wider margin and locks in certainty across winter 2026/27.
OVO Greener Gas Fix uses 15% biomethane plus carbon offsets. Ecotricity and Good Energy offer 100% green-gas options with a small premium. The other suppliers offer offset-based green add-ons.
Yes. If you're tied to a specific Smart Export Guarantee (SEG) supplier for export, splitting gas to a separate cheaper supplier is normal and supported.
Around 5 working days end-to-end, including the 14-day cooling-off period. You stay supplied throughout.
Gas Safe records are independent of supplier. Switching has no impact on your boiler service or warranty arrangements.
Trackers like Octopus Tracker Gas and EDF Ensure can be cheaper on average but expose you to seasonal moves. With the cap having just risen, a 12-month fix below cap is usually the safer pick for cost certainty across winter 2026/27.

How we assess this

Last updated
August 2026

Tariff snapshot taken in August 2026 from the EnergyPlus switching panel and confirmed against supplier websites. Annual cost figures use Ofgem Typical Domestic Consumption Values (TDCV) and the confirmed Q3 2026 cap (£1,663/yr, effective 1 July) as the reference.

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Sources

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Updated on 27 Aug 2026