Cheapest fixed energy deal after the price cap rise (UK guide)
See when a fixed tariff can beat (or protect you from) the Ofgem price cap—plus what “cheapest” really means for your meter, payment method and region.
- Find fixed deals you’re actually eligible for (postcode, meter type, payment method)
- Understand unit rates, standing charges, exit fees and discounts before you switch
- Compare like-for-like with the cap using realistic UK examples and caveats
Figures shown are estimates. Your cheapest fixed deal depends on usage, region, meter type, and payment method. Terms and availability change.
Fast answer: what’s the cheapest fixed deal after the cap rise?
There isn’t one universal “cheapest fixed energy deal” for the UK—because suppliers price fixed tariffs by region, meter type (single-rate, Economy 7, smart prepay), payment method (Direct Debit vs prepayment), and sometimes online-only or dual fuel eligibility.
Rule of thumb: after a price cap rise, a fixed deal is usually worth considering if (a) the estimated annual cost is competitive with the current price-capped variable tariff and (b) you’re comfortable with the tie-in period and any exit fees.
Key takeaways (UK-specific)
- Compare on total annual cost, not just unit rates: standing charges vary widely by region.
- Check your meter type: Economy 7 and prepay tariffs can price very differently from single-rate credit meters.
- Look for exit fees (per fuel): these can outweigh savings if you leave early.
- Discounts can be conditional: e.g. “online account”, “paperless billing”, or “new customer only”.
- Fix length matters: a 12‑month fix can be lower-risk than a longer fix if prices fall later.
Compare fixed tariffs (whole-of-market approach)
To find the cheapest fixed energy deal for you after a cap rise, you need a like‑for‑like comparison against the price-capped variable tariff available in your area—using your meter type and payment method.
What we mean by “cheapest”: the lowest estimated annual cost for the same fuel(s), based on the unit rate(s) and standing charge(s) shown for your tariff and region. This is different from the Ofgem price cap headline figure, which is based on a “typical household” profile.
Two realistic UK scenarios (with numbers)
Scenario A: medium-use dual fuel (Direct Debit)
- Home type
- 2–3 bed house
- Meter
- Single-rate electricity + gas
- Usage assumption
- Elec 2,900 kWh / Gas 12,000 kWh
- Price cap comparison
- Variable tariff at capped rates in your region
If a 12‑month fix comes out at £70/year lower than your capped variable estimate, the fixed deal may suit you—provided exit fees won’t wipe out that gap if you need to leave early.
Example only. Actual £ difference depends on your region’s standing charges and the deal’s unit rates.
Scenario B: low-use flat (electricity only)
- Home type
- 1 bed flat
- Meter
- Single-rate electricity only
- Usage assumption
- Elec 1,600 kWh
- Key sensitivity
- Standing charge dominates bills
Low users often see smaller gains from switching if the standing charge is high. A deal with a slightly higher unit rate can still be cheaper overall if its standing charge is lower in your region.
Example only. Always compare total annual estimate, not one headline rate.
How to choose a fixed deal after a cap rise
- Confirm your meter type (single-rate, Economy 7, smart prepay) and how you pay.
- Use your annual usage (kWh) if you have it—ideally from your latest bill or online account.
- Compare total annual cost for fixed vs variable in your region (including standing charges).
- Check exit fees and contract length; note if fees apply per fuel.
- Look for practical constraints: smart meter required, online-only account, new customer only, or dual fuel required.
- Decide what you’re optimising: lowest estimate today, or budget certainty for 12+ months.
Get your personalised fixed deal options
Tell us a few details and we’ll match you to available tariffs for your home. This helps avoid “cheap” deals you can’t actually take.
Good to know: switching normally doesn’t involve any interruption to your supply. If you have debt on a prepay meter, there may be extra steps before you can switch.
Fixed vs price-capped variable: what to compare
Use this table to compare deals fairly. The “cheapest fixed deal” for you is the one with the lowest total estimated annual cost for your exact set-up—and terms you can live with.
| What you’re checking | Why it matters | Quick UK caveat |
|---|---|---|
| Estimated annual cost | Best single number to compare like-for-like using your usage. | A “cap rise” doesn’t mean every home pays the cap headline figure. |
| Unit rate(s) (p/kWh) | Directly affects what you pay for each kWh used. | Economy 7 has day/night rates—timing matters. |
| Standing charge (p/day) | Can dominate bills for low users; varies by region. | Some regions (and fuels) have noticeably higher standing charges. |
| Exit fee (£) | Affects whether it’s worth switching again if prices fall. | Often charged per fuel (gas + electricity). |
| Tariff length | Longer fixes give more certainty but reduce flexibility. | If your current deal ends, you may move onto a supplier’s SVT (often price-capped). |
| Eligibility rules | Stops you wasting time on deals you can’t take. | Some tariffs require smart meters or exclude certain meter types. |
Decision checklist: who a fix often suits
- You want budget predictability for the next 12+ months.
- Your current tariff is ending and you’ll likely move onto a capped SVT.
- You’re happy to keep the same tariff for the full term (or the exit fee is low/£0).
- You have stable occupancy (not planning to move soon).
Who it may not suit (or needs extra care)
- You might need to switch again soon (exit fees could outweigh savings).
- You’re on prepay or have debt to repay (switching can be more complex).
- You’re unsure whether you’ll stay at the property for the full term.
- You have an Economy 7 set-up but your usage pattern is mostly daytime.
Important: the Ofgem price cap limits what suppliers can charge for their default variable tariffs (SVTs) per unit and standing charge—it is not a cap on your total bill. Your bill depends on usage.
Costs, exclusions and common pitfalls (after a cap rise)
After a price cap change, it’s easy to focus on headlines. These are the real-world checks that stop you choosing a “cheap” deal that later disappoints.
1) Exit fees can erase small savings
If your fixed deal is only slightly cheaper than the capped variable estimate, even a modest exit fee (especially per fuel) can wipe out the benefit if you need to leave early.
2) Standing charge differences are regional
A deal that looks cheap in one region may not be in yours. Always compare the tariff details matched to your postcode region.
3) Meter type mismatches
Economy 7 and prepay tariffs often price differently. If you select the wrong meter type, a “cheapest” result can be misleading.
Discounts and bundle conditions
- Direct Debit requirements (some deals are priced assuming DD).
- Paperless / online-only account requirements.
- Dual fuel pricing: electricity-only may be priced differently.
- New customer restrictions can apply.
Timing: when you switch matters
If you’re approaching the end of a fix, it can be worth comparing early so you know your options. Some switches can be arranged to start when your current deal ends.
Reminder: the cap changes periodically. A fixed deal that looks good today might not be best after a future cap change—so check contract length and exit fees.
Tenants: you can usually switch if you pay the bills and have the account in your name. If bills are included in rent, you generally can’t choose the tariff.
FAQs: cheapest fixed deals after a UK price cap rise
Is a fixed tariff always cheaper after the price cap goes up?
No. The cap applies to default variable tariffs (SVTs). A fixed deal may be cheaper, similar, or more expensive depending on the supplier’s pricing, your region, and your usage. Compare using a total annual estimate.
Does the Ofgem price cap mean my bill is capped?
No. The cap limits the price per kWh and standing charge on SVTs. Your bill still depends on how much energy you use.
What details change which deal is “cheapest” for me?
The big three are: postcode region (standing charges vary), meter type (single-rate vs Economy 7 vs prepay), and payment method (Direct Debit vs prepay). Your annual kWh usage then determines the total cost.
Can I switch if I have a smart meter?
Usually yes. In some cases, smart features can go into “dumb mode” temporarily after switching, but your supply continues. Some tariffs may require a working smart meter for certain features (like smart prepay).
Can I switch if I’m on prepayment?
Often yes, but options can be narrower and switching can be more complicated if you have debt on the meter. It’s worth checking eligibility specifically for prepay tariffs rather than assuming credit-meter deals apply.
Are fixed deals protected by the price cap?
No. The Ofgem price cap applies to default variable tariffs, not fixed tariffs. A fixed tariff price is set by your contract for the fixed term (subject to its terms).
Will switching interrupt my gas or electricity supply?
Switching supplier normally doesn’t interrupt supply. Your energy comes through the same pipes and wires. You may need to provide meter readings so your old and new suppliers bill you correctly.
What if I’m moving home soon?
If you’re likely to move within the fixed term, pay close attention to exit fees and whether the tariff can move with you. Some suppliers may allow a transfer, but it depends on availability at your new address.
Trust, methodology and sources
Page details
- Written by
- EnergyPlus Editorial Team
- Reviewed by
- Energy Specialist
- Last updated
- May 2026
How we assess “cheapest fixed deal” (transparent methodology)
- Comparison basis: estimated annual cost calculated from tariff unit rates (p/kWh) and standing charges (p/day), using either user-provided usage or standard usage assumptions where stated.
- Cap comparison: we compare against the relevant supplier default variable tariff (SVT) priced under the Ofgem cap for the user’s region and meter/payment type where applicable.
- Assumptions used in examples on this page: electricity 2,900 kWh & gas 12,000 kWh for a medium-use dual fuel household; 1,600 kWh for a low-use electricity-only flat. These are illustrative only.
- What we do not assume: we don’t assume you’ll definitely save; we don’t assume you can access every deal; we don’t assume future cap levels.
- Limitations: tariffs change frequently; some deals are limited to certain meters, regions, or payment methods; some include conditional discounts. Always confirm full tariff information before switching.
Sources (UK)
- Ofgem: check if the energy price cap affects you
- Citizens Advice: energy supply and switching help
- GOV.UK: energy guidance and support
We also reference supplier tariff information and eligibility rules provided during the quote journey (where available). Always check your final tariff details before agreeing to switch.
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