Should I Fix My Energy Before January? Fix vs Cap 2026

Last Updated on October 20, 2026

Should I fix my energy before January? If you are on the default price cap tariff, fixing could be worthwhile, particularly if the forecast January increase materialises. The cap is £1,723 a year until 31 December and is forecast to rise to between £1,999 and £2,185 on 1 January, while a fixed deal protects its agreed rates for the contract term.

The catch is that some fixes cost more than the cap right now, so you could pay a premium today in exchange for protection against higher bills later.

We checked the fixed deals listed in the second half of October 2026 and ran the numbers against the January forecasts, dating every figure.

Quick answer: If you are on the default price cap tariff, fixing is worth considering. Mid-October fixes cost £1,725 to £1,814 a year for a typical home, against £1,723 now and a forecast £1,999 to £2,185 from January. The £1,814 fix could recover its initial premium if the cap stays high for several months. If you are already fixed with over 49 days left, check the cost of leaving before switching.

Contents

0.1 Key takeaways

1 Should I fix my energy before January? The short answer
2 Which fixed energy tariffs are on sale in October 2026?
3 Fix or wait: how long does the cap need to stay high?
4 What if the cap ends up lower than forecast?
5 How to choose a fix: four checks
6 Does fixing work if you are thinking about solar panels?
7 FAQs
8 Our Verdict
9 Sources

Key takeaways

The current cap is £1,723. January forecasts range from £1,999 to £2,185, equivalent to £276 to £462 more a year.
Fixes listed by Which? on 15 October cost £1,725 to £1,814 for a typical home, with exit fees of £100 to £200.
Octopus’s newer 18-month fix was roughly 7% to 12% above the capped bill by region, so comparing suppliers matters.

Should I fix my energy before January? The short answer

Your situation	What to consider	Why
On the default price cap tariff	Compare fixed deals now	The cap is forecast to rise 16% to 27% on 1 January
On a fix with under 49 days left	Compare and arrange a new fix	You can generally switch without exit fees during the final 49 days
On a fix with over 49 days left	Check your existing rates first	Your rates are protected, and switching early may trigger an exit fee

This broadly matches Uswitch’s guidance of 19 October. MoneySavingExpert recommends comparing fixed deals rather than automatically staying on the price cap, while Which? notes that a fix may not save money immediately but can protect against winter increases.

The forecasts are covered in our guide to the January 2027 energy price cap.

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Which fixed energy tariffs are on sale in October 2026?

These are the fixes Which? listed on 15 October 2026, showing annual costs for low, medium and high energy consumption when paying by Direct Debit.

Tariff	Length	Exit fee	Low	Medium	High
Price cap (Oct–Dec 2026)	None	None	£1,208	£1,723	£2,424
Fuse Energy October 2026 Fixed V4	24 months	£100	£1,179	£1,725	£2,463
Sainsbury’s Energy Fix and Save v11	24 months	£200	£1,244	£1,778	£2,505
E.ON Next Next Fixed v77	24 months	£200	£1,249	£1,810	£2,571
Co-op Energy 18M Fixed October 2026 v4	18 months	£150	£1,265	£1,814	£2,561
Octopus Energy 18M Fixed October 2026 v4	18 months	£150	£1,265	£1,814	£2,561

Which? estimated that, with a January cap near £2,000, all five fixes could save a typical household more than £180 a year compared with remaining on the higher variable rates.

Prices have since moved. On 16 October, MoneySavingExpert listed Fuse’s updated 24-month fix (V5) at 0.9% below the cap, approximately £1,707 by calculation.

Octopus Energy’s public product information on 20 October showed newer versions:

Octopus fix (20 Oct 2026)	Available from	Typical bill by region	Exit fee
18M Fixed	17 Oct	£1,831 to £1,938	£75 per fuel
12M Fixed	19 Oct	£1,886 to £2,053	£50 per fuel
6M Winter Fix	19 Oct	£1,916 to £1,919	None

Octopus’s typical-bill figures assume 2,500 kWh of electricity and 9,500 kWh of gas by Direct Debit. The six-month fix lists London and the North West only.

Against Ofgem’s regional cap tables, the 18-month fix is estimated to be 7% to 12% above capped rates across regions, while the 12-month fix is approximately 12% to 14% above.

In Eastern England, the 18-month fix is £1,861 against a capped bill of approximately £1,713 to £1,721.

Fixed prices can move quickly as wholesale energy costs change. LocalEnergyPrices listed 24-month fixes near £1,670 on 5 October, compared with Which?’s £1,725 cheapest deal ten days later.

These are dated snapshots, not guaranteed live offers. Always obtain a fresh quote before switching.

Fix or wait: how long does the cap need to stay high?

A fixed tariff may cost more than the current cap but less than the January cap.

The question is how long higher variable rates need to last before the fix becomes cheaper overall.

The following comparison uses a simplified model. It assumes you pay the fixed tariff’s premium for one year and then benefit from a period when the price cap remains at the forecast January level.

Fix (typical home)	Annual price	Premium over £1,723	Months at £1,999 to recover premium	Months at £2,154
Fuse 24M V4	£1,725	£2	Under 1	Under 1
Sainsbury’s 24M	£1,778	£55	2.4	1.5
E.ON Next 24M	£1,810	£87	3.8	2.4
Octopus or Co-op 18M v4	£1,814	£91	4.0	2.5
Octopus 18M, 17 Oct version	Approx. £1,881	Approx. £158	6.9	4.4

Illustrative calculation: 12 × annual premium ÷ (forecast cap minus £1,723). The Octopus 17 October figure uses the average of 14 regional quotes.

Take the £1,814 fix as an example.

If Cornwall Insight’s £1,999 forecast proves correct and the cap remains elevated for several months, the fix could recover its initial premium.

At the higher £2,154 forecast, the potential saving accumulates more quickly.

Before January, the £1,814 fix costs approximately £7.60 more per month than the current cap for a typical household.

These calculations are illustrative rather than a full comparison of 18- or 24-month contracts. Actual savings depend on when the fix starts, future quarterly caps, energy usage and the tariff’s unit rates and standing charges.

What if the cap ends up lower than forecast?

You could pay more by fixing.

For example, if you choose a tariff costing £1,814 annually and the variable cap remains at £1,723, the difference is approximately £91 a year.

Over 18 months, that amounts to approximately £136, assuming the same annual consumption and rates throughout.

If the contract also has a £150 exit fee, leaving early might not make financial sense.

This is why a fixed deal should be judged against several possible future price scenarios rather than only the highest forecast.

How to choose a fix: four checks

Check the price against your own consumption

A typical household figure is useful for comparing tariffs, but your actual costs depend on the amount of gas and electricity you use.

Which? recommends using your annual consumption in kWh when comparing offers.

Check the exit fee

Which?’s October comparison found dual-fuel exit fees ranging from £100 to £200.

A lower exit fee provides more flexibility if cheaper tariffs become available.

Compare the contract length

MoneySavingExpert reported that some of the cheapest fixed deals were for 18 or 24 months, sometimes £30 to £50 cheaper than comparable 12-month options.

However, a longer contract also means remaining committed for longer if market prices fall.

Read the tariff conditions

Check whether the offer requires paperless billing, Direct Debit payments or other conditions.

Some deals have limited availability windows.

For example, Energy Made Easy reported that certain Octopus 12- and 18-month prices were only listed until 17 October.

Does fixing work if you are thinking about solar panels?

Yes. Fixed tariffs and solar panels affect different parts of your electricity bill.

A fixed tariff determines what you pay for each unit purchased from the grid.

Solar panels reduce the number of units you need to buy by generating electricity at home.

At the current electricity unit rate of 26.32p per kWh, using 1,000 kWh of your own solar electricity instead of buying it from the grid would avoid approximately £263 in unit charges.

Actual savings depend on how much solar electricity you use directly, your tariff and any export payments.

For more information, read our guides to whether solar panels are worth it, solar panel payback periods and average monthly electricity bills with solar.

You can also reduce your overall consumption with our advice on reducing your gas bill and saving on your electricity bill.

Ofgem is due to announce the January cap by 25 November. Our guide to the next energy price cap announcement explains the dates.

For an estimate of the impact on household bills, see how much energy bills could go up in January.

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FAQs

Should I fix my energy before January?

If you are on the default price cap tariff, comparing fixed deals now is sensible.

The current cap is £1,723, while January forecasts range from £1,999 to £2,185.

Mid-October fixed tariffs were available at approximately £1,725 to £1,814 for a typical household.

However, you should compare the deal against your own energy usage and check any exit fees before committing.

Will fixed energy prices go up before January?

They could.

Suppliers can change the prices of new fixed deals as wholesale costs move.

October 2026 listings show that some fixed tariffs have already become more expensive, although the examples involve different tariff versions and are not always directly comparable.

How long should I fix my energy for?

An 18- or 24-month fix can provide longer protection against higher prices.

MoneySavingExpert reported that some longer fixes were £30 to £50 cheaper than comparable 12-month deals in October 2026.

However, shorter deals may offer more flexibility if wholesale prices fall.

What exit fee will I pay on a fixed energy tariff?

Exit fees depend on the tariff.

Which?’s 15 October comparison showed charges of £100 to £200 for dual fuel.

Octopus’s newer offers listed £50 per fuel for a 12-month fix and £75 per fuel for an 18-month fix.

Under the usual domestic switching rules, you can switch without an exit fee during the final 49 days of a fixed contract.

Does the electricity VAT cut apply to fixed tariffs?

Yes.

The government expects suppliers to pass the reduction in VAT on domestic electricity to fixed-tariff customers.

The announced 0% rate applies from 1 October 2026 to 31 March 2027.

Unless extended, the standard VAT rate would return after that period.

Our Verdict

If you are currently on the default price cap tariff, comparing fixed deals before January 2027 makes sense.

The forecast increase of £276 to £462 a year is substantial, and several fixed tariffs listed in mid-October were close to the current cap.

A deal costing around £1,810 or less for a typical household could provide useful protection if January prices rise as forecast.

More expensive fixes require greater care, particularly when exit fees are high or the contract lasts 18 to 24 months.

If you are already on a competitive fixed tariff, check your existing rates and remaining contract term before switching.

Longer term, reducing energy consumption and generating electricity with solar panels can help lower the amount you need to purchase, regardless of which tariff you choose.

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