Cheapest fixed energy tariff after the October price cap (UK)

Q: What does 'cheapest fixed tariff' actually mean?

For most households, it means the lowest estimated annual cost for your postcode, payment method and usage, after considering standing charges and fees. The cheapest unit rate is not always the cheapest overall.

Find out when a fixed deal is likely to beat the Ofgem price cap, what “cheapest” really means for your home, and how to compare fixes safely (rates, standing charges, fees and meter type).

Clear, UK-specific guidance for October cap changes (no hype)
Two realistic cost scenarios with worked numbers (electricity-only and dual fuel)
Compare fixed tariffs by unit rates + standing charges + exit fees (not just the headline)

Get your fixed tariff quote See the fast answer

Estimates only. The cheapest tariff depends on where you live, payment method, meter type (credit / prepayment), and your usage. Terms and availability vary by supplier.

Fast answer: what’s the cheapest fixed tariff after the October cap?

There isn’t one single “cheapest fixed tariff” for the whole UK after October—because fixed prices vary by region, meter type (credit vs prepayment), payment method (Direct Debit vs cash/cheque), and how much energy you use. The most reliable way to judge whether a fix is genuinely cheaper than the Ofgem price cap is to compare the estimated annual cost made up of:

Unit rates (p/kWh) for electricity and gas
Standing charges (p/day)
Any exit fees if you leave early
Any discounts/conditions (for example Direct Debit-only pricing)

The Ofgem price cap limits what suppliers can charge on standard variable tariffs (including default tariffs). It is not a cap on your total bill, and fixed tariffs can be above or below it. Your bill still depends on usage. For Ofgem’s explanation, see Ofgem guidance for household energy consumers.

Key takeaways (UK homeowners & renters)

Cheapest = lowest total cost

A lower unit rate can be wiped out by a higher standing charge (or vice versa). Always compare estimated annual cost for your usage and postcode.

After October, check the breakeven

A fix is usually “worth it” if it stays below the cap long enough to cover any exit fee and the risk of overpaying if prices fall.

Meter type changes the answer

Prepayment customers often see different rates and fewer deals. Economy 7 (and smart time-of-use) tariffs need a usage pattern match to be “cheapest”.

Compare fixed tariffs the safe way (and avoid false “cheapest” deals)

If you’re searching for the cheapest fixed energy tariff after the October cap, focus on the parts of the tariff that change your bill the most:

1) Unit rates (p/kWh): Your usage multiplies these. High-use homes usually benefit more from lower unit rates than from small standing charge differences.
2) Standing charges (p/day): Low-use homes can be disproportionately affected by higher standing charges. In some regions these vary a lot.
3) Exit fees and contract length: An apparently cheaper 24‑month fix can be expensive if you need to move, switch again, or if prices drop.
4) Eligibility and payment method: Some deals are Direct Debit-only, credit meter-only, or exclude certain regions and metering setups.

If you’re on a standard variable tariff (SVT), you can usually switch without exit fees (but check your tariff terms). If you’re currently on a fixed deal, confirm the exit fee and whether it applies within the last 49 days (many suppliers waive exit fees near the end of a fix, but not all).

Two realistic October scenarios (with numbers)

These examples are illustrative to show how “cheapest” can change. We’re using simplified arithmetic and estimated annual usage. Your exact costs depend on your rates, standing charges, and region.

Scenario A: electricity-only flat (credit meter)

Usage: 2,000 kWh/year
SVT (cap-aligned) example: 25.0p/kWh + 60p/day
Fixed example: 23.0p/kWh + 65p/day, £50 exit fee

Estimated annual SVT cost:
2,000×£0.25 = £500
Standing charge: 365×£0.60 = £219
Total ≈ £719/year

Estimated annual fixed cost:
2,000×£0.23 = £460
Standing charge: 365×£0.65 = £237
Total ≈ £697/year

What this means: Fixed looks ~£22/year cheaper on rates alone, but if you leave early, the £50 exit fee could outweigh it.

Scenario B: dual fuel family home (gas + electricity)

Usage: 2,900 kWh electric + 11,500 kWh gas/year
SVT example: Elec 25.0p/kWh + 60p/day; Gas 6.5p/kWh + 32p/day
Fixed example: Elec 24.0p/kWh + 55p/day; Gas 6.2p/kWh + 30p/day, £100 exit fee

Estimated annual SVT cost:
Elec: 2,900×£0.25 = £725; SC: 365×£0.60 = £219 → £944
Gas: 11,500×£0.065 = £748; SC: 365×£0.32 = £117 → £865
Total ≈ £1,809/year

Estimated annual fixed cost:
Elec: 2,900×£0.24 = £696; SC: 365×£0.55 = £201 → £897
Gas: 11,500×£0.062 = £713; SC: 365×£0.30 = £110 → £823
Total ≈ £1,720/year

What this means: Around £89/year cheaper on these assumptions. If you’re likely to switch again or move, factor in the £100 exit fee and how long you’ll keep the fix.

Important: The “price cap” is reviewed periodically and your SVT rates can change. A fixed tariff protects you from those changes for the fix term, but you can end up paying more if prices fall. Citizens Advice explains switching rights and what to check before you switch: Switching energy supplier (Citizens Advice).

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Comparison table: how to judge the cheapest fixed tariff (after October)

Use this as a practical checklist when you’re comparing a fixed tariff against the capped SVT. If a supplier headline looks good but fails one of these checks, it may not be the cheapest overall.

Check	Why it matters	What to do	Common mistake
Unit rate (p/kWh)	Largest driver for medium/high usage homes	Compare electric + gas unit rates for your region and payment method	Comparing unit rate only and ignoring standing charge
Standing charge (p/day)	Can make “cheap” deals expensive for low usage or second homes	Convert to annual (×365) and add to usage cost	Assuming standing charges are the same everywhere
Contract length	Long fixes reduce price risk but increase flexibility risk	Choose a term that matches how long you expect to stay put	Picking 24 months without considering moving or switching again
Exit fee	Can remove the benefit if you leave early	Work out a breakeven: expected saving must exceed the fee	Forgetting dual fuel may have two fees (one per fuel)
Meter / tariff type	Economy 7 and time-of-use need the right usage split	If you have E7, check day vs night rates and your night usage %	Switching to multi-rate without confirming it suits your pattern
Payment method	Direct Debit is often cheapest; alternatives may cost more	Confirm the quote uses your intended payment method	Comparing a DD deal to a non-DD SVT price

Quick decision checklist: who a fixed tariff suits (after October)

A fixed tariff may suit you if…

You value price certainty through winter bills
The fixed deal is clearly below your SVT estimate for your usage
Exit fees are low (or you’re confident you’ll keep the tariff)
You’re on Direct Debit and can access a wider set of deals

A fixed tariff may not suit you if…

You expect to move home soon or switch again quickly
The deal only “wins” if prices rise (i.e., it’s above the cap today)
You’re on prepayment and the available fixes are limited or higher
You have Economy 7 and you’re not sure of your day/night split

Costs, exclusions and common pitfalls (October cap context)

Fixed tariffs can be a good choice, but “cheapest” claims often miss the fine print. These are the most common reasons people end up on a deal that isn’t cheapest for their home.

1) Standing charge surprises

Some fixes lower unit rates but raise standing charges. This can be costly for small flats, low-use households, or second homes.

2) Exit fees on both fuels

Dual fuel deals can have separate exit fees for gas and electricity. If you might switch again, include this in your breakeven.

3) Economy 7 mismatch

Economy 7 is only “cheap” if you use a meaningful portion of electricity at night. Ask your supplier for your day/night split if unsure.

4) Regional price differences

The cap and tariffs vary by region (network charges). A deal that’s “cheapest” in one area may not be in another.

5) Payment method assumptions

Quotes often assume monthly Direct Debit. If you pay on receipt of bill or prepay, the “cheap” headline may not apply.

6) Confusing “cap” with bill

The cap limits unit rates and standing charges, not total spend. High usage still means a higher bill.

If you’re struggling to pay: you may be eligible for support (including payment plans, emergency credit for prepayment meters, or supplier hardship help). Start with Citizens Advice help with energy bills and the government’s guidance on support schemes at GOV.UK help for households.

FAQs: cheapest fixed tariff after the October cap (UK)

Is a fixed tariff always cheaper than the Ofgem cap after October?

No. A fixed tariff can be below or above the capped SVT. It can still be the best choice if you want certainty, but “cheaper” should be judged by your estimated annual cost (unit rates + standing charges) and any exit fee risk.

What does “cheapest fixed tariff” actually mean?

For most households, it means the lowest estimated annual cost for your postcode, payment method and usage, after considering standing charges and fees. The cheapest unit rate is not always the cheapest overall.

Can renters switch to a fixed tariff?

Usually yes, if you pay the energy bills and the supply is in your name. If you’re on a prepayment meter or your tenancy includes bills, your options may be different. If in doubt, check your tenancy agreement and ask the current supplier.

Do fixed tariffs have standing charges?

Most do. Standing charges vary by region and meter type, and can change whether a deal is truly cheapest. Always compare the full cost, not just the unit rate.

How do exit fees work on fixed energy tariffs?

Exit fees are charged if you leave a fixed tariff before the end date (rules vary by supplier and tariff). Some suppliers waive fees close to the end of the contract; others don’t. Check the tariff information label or key facts before you agree.

Will I lose supply if I switch after October?

Switching should not interrupt your energy supply. Your meter and pipes/wires don’t change—only the billing supplier. Ofgem explains the switching process and consumer protections here: Changing energy supplier (Ofgem).

I have a smart meter — can I still take a fixed tariff?

Yes, in most cases. You may also be eligible for smart or time-of-use tariffs. If you’re considering time-of-use, compare carefully: the cheapest option depends on when you use electricity.

Is it better to fix for 12 or 24 months after October?

It depends on your priorities. A longer fix gives more certainty but reduces flexibility and can carry higher exit fees. A 12‑month fix can be a middle ground if you want protection through one winter while keeping options open.

What information do I need to compare properly?

Your postcode, whether you’re dual fuel, your meter type (credit/prepayment/Economy 7), payment method, and ideally your annual usage in kWh (found on bills or in your online account). Without usage, comparisons are less accurate.

How we assess “cheapest” (methodology you can audit)

Our definition of “cheapest”

We treat “cheapest fixed tariff” as the lowest estimated annual cost for a given household profile, based on unit rates + standing charges, then adjusted for likely switching behaviour (for example, the impact of exit fees if you may leave early).