Best fixed-rate energy tariffs UK — May 2026 best-buys ranked
Compare every best-buy fixed-rate dual-fuel tariff verified live in May 2026, with TDCV annual pricing, exit fees, term length and smart-meter requirements side by side. EnergyPlus runs whole-of-market every morning so you can lock in a rate that beats the 1 July 2026 cap rise in minutes.
- Seven best-buy fixes ranked May 2026 — 12-month, 18-month and 24-month terms
- TDCV annual costs (2,700 kWh elec + 11,500 kWh gas, direct debit, dual fuel)
- Exit fee detail — £25/£50 per fuel where applicable, none on others
- Honest smart-meter requirement column — not all best-buys accept traditional meters
Why fixing now matters — the July 2026 cap math
The Ofgem default cap rises to £1,862/yr from 1 July 2026 (+13% on the current April–June period). The cheapest 12-month fix on the market today, E.ON Next Fixed v53 at £1,602/yr, sits £248 below that. Across a 12-month term that's just under £21/month banked simply by switching now — a payback measured in the first month of the new cap period.
Around 22 million UK accounts are already on a fixed tariff and will see no change in July. Households still on a default standard variable rate are the ones exposed. EnergyPlus checks whole-of-market every morning so you see the live May 2026 best-buys ranked for your postcode.
Find the best fixed-rate tariff for your home
Enter your postcode and rough usage — we'll match every live May 2026 best-buy fix against your account. Takes about 60 seconds.
UK best-buy fixed-rate energy tariffs — May 2026 ranked
All annual figures use Ofgem's standard TDCV benchmark of 2,700 kWh electricity + 11,500 kWh gas, direct debit, dual fuel. Verified May 2026. Smart column shows whether the supplier requires a SMETS2 install within 90 days of switching.
| Tariff | Term | Annual (TDCV) | Saving vs July cap | Exit fee | Smart needed? |
|---|---|---|---|---|---|
| E.ON Next Fixed v53 | 12 months | £1,602 | £248 | £25/fuel | Yes (90 days) |
| So Energy 18M Fix | 18 months | £1,612 | £238 | £50/fuel | Yes (90 days) |
| Outfox the Market 18M | 18 months | £1,624 | £226 | £30/fuel | Yes (90 days) |
| Octopus 12M Fixed v18 | 12 months | £1,632 | £218 | None | Yes (90 days) |
| EDF Essentials Plus 12M | 12 months | £1,649 | £201 | £25/fuel | No — traditional accepted |
| OVO 2-Year Fix | 24 months | £1,705 | £145 | £50/fuel | No — traditional accepted |
| British Gas The Fix v17 | 12 months | £1,719 | £131 | £50/fuel | Yes (90 days) |
All seven tariffs are open to switching in May 2026. Pricing varies marginally by region (±£25/yr at TDCV) under Ofgem's regional standing-charge differential.
12-month vs 18-month vs 24-month — which term to pick in May 2026
12-month fixes
Best for households expecting wholesale prices to fall sharply later in 2026 or 2027 — you reprice in 12 months and capture any decline. E.ON Next Fixed v53 at £1,602/yr is the standout May 2026 12M choice.
18-month fixes
The Goldilocks term for risk-averse households — covers two full winters and the volatile spring shoulder period. So Energy 18M at £1,612/yr is just £10 more than the cheapest 12M but locks rates six months longer.
24-month fixes
OVO 2-Year Fix at £1,705/yr is materially higher — about £100/yr above the best 12M — but suits households that simply want set-and-forget pricing through the next two winters with no re-shopping needed.
Worked annual savings (verified May 2026)
A TDCV household paying the new July cap of £1,862/yr who switches to each of the best-buys today saves the following over a full 12-month period:
| Switch to | Annual cost | 12-month saving | Monthly saving |
|---|---|---|---|
| E.ON Next Fixed v53 | £1,602 | £248 | £20.67 |
| So Energy 18M Fix | £1,612 | £238 | £19.83 |
| Outfox the Market 18M | £1,624 | £226 | £18.83 |
| Octopus 12M Fixed v18 | £1,632 | £218 | £18.17 |
| EDF Essentials Plus 12M | £1,649 | £201 | £16.75 |
High-usage households (15,000 kWh+ gas) see proportionately larger savings — typically £320–£400/yr versus the July cap for the top three options.
Exit fees — what they mean for your switch
When exit fees apply
Exit fees only apply if you switch supplier during the fixed term. Switching to the same supplier's new tariff at end of term is always free, and Ofgem rules require zero exit fees in the final 49 days before the term ends.
Real-world cost
The two zero-exit-fee best-buys (Octopus 12M Fixed v18 and Utility Warehouse Value) give maximum flexibility. The £25–£50 per fuel charges on E.ON Next, EDF, OVO and British Gas only bite if you switch mid-term and aren't usually material against the £200+/yr savings on offer.
How to switch to a best-buy fix — four steps
- Take a fresh gas and electricity meter reading today — your new supplier uses these to take over from your current supplier without an estimate.
- Run the comparison form above with your postcode. The May 2026 ranked best-buys for your region appear with annual cost, exit fee and smart-meter requirements clearly labelled.
- Pick a tariff and apply online — typically takes 5–10 minutes including direct debit setup.
- Switch completes within 5 working days under the Faster Switch Guarantee. Your old supplier sends a final bill within six weeks; you start saving immediately on day one of the new contract.
Frequently asked questions — best fixed-rate energy tariffs (May 2026)
What is the cheapest fixed-rate energy tariff in the UK in May 2026?
E.ON Next Fixed v53 at £1,602/yr (TDCV) is the cheapest 12-month fix verified live in May 2026. The cheapest 18-month fix is So Energy 18M at £1,612/yr — just £10 more for six extra months of price certainty. Compare deals now.
Should I fix before the 1 July 2026 cap rise?
Yes — if you're on a default standard variable tariff. The cap rises £221/yr from 1 July 2026, and the cheapest fix today (E.ON Next Fixed v53) sits £248 below that new cap. Switching now locks in 12 months of price certainty. Use the comparison form to confirm pricing for your postcode.
Is a 12-month, 18-month or 24-month fix best?
For most households a 12-month fix balances cost and flexibility — E.ON Next Fixed v53 at £1,602/yr is the standout. Risk-averse households who want to span two winters should consider So Energy 18M (£1,612/yr). Set-and-forget bill payers can choose OVO 2-Year (£1,705/yr).
What is the exit fee on a fixed-rate energy tariff?
It varies. Octopus 12M Fixed v18 has zero exit fee. E.ON Next and EDF charge £25 per fuel (£50 dual fuel). So Energy, OVO and British Gas charge £50 per fuel (£100 dual fuel). Ofgem rules waive all exit fees in the final 49 days of the contract.
Do all best-buy fixes require a smart meter?
No. EDF Essentials Plus and OVO 2-Year Fix both accept traditional meters with no smart install commitment. The remaining May 2026 best-buys (E.ON Next, Octopus, So Energy, Outfox, BG) all require a SMETS2 install within 90 days. Filter for no-smart-meter in the comparison form.
How much can a typical household save by switching to a fix?
A TDCV household paying the new July cap of £1,862/yr saves £248/yr (£20.67/month) by switching to E.ON Next Fixed v53. High-usage households (15,000 kWh+ gas) typically save £320–£400/yr. Run your own usage through the comparison form.
How long does the switch take in May 2026?
All Ofgem-licensed suppliers operate under the Faster Switch Guarantee — your new fixed tariff goes live within 5 working days of application. There's no break in supply and no engineer visit. Final bill from your old supplier arrives within six weeks.
What happens at the end of my fixed-rate term?
Your supplier will roll you onto their default standard variable tariff unless you re-fix. Ofgem rules waive exit fees in the final 49 days of the term — use that window to re-compare via the comparison form and lock in the next best-buy.
Lock in a fix before the 1 July 2026 cap rise
The cap rises £209 in 32 days. The seven best-buys in this guide all undercut the new cap by £131–£248/yr and are verified open to switching this weekend. Verified May 2026 pricing.
Find your best fixed-rate tariff
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