Last updated: 16 October 2026 · Written during the 2026/27 tax year. Energy cap periods follow calendar quarters, not tax years. Applies to domestic default tariffs in England, Scotland and Wales.
The energy price cap forecast for January 2027 is worrying, but it is not a confirmed bill. Before changing tariffs, I would separate the prediction from the rules, then compare the options using the energy your household actually uses.
I’m Kalpana, a UK mum, former science teacher and PhD scientist. This guide checks the numbers behind the headlines and gives you a practical comparison checklist. For everyday reductions in usage, read my 100 ways to save energy at home.
Forecast source: MSE’s forecast table, updated 15 October 2026. These are supplier predictions, not Ofgem’s announced January rates.
| Period or scenario | Typical-use annualised illustration | Status |
|---|---|---|
| October–December 2026 | £1,723 | Current typical-use benchmark, dual fuel, Direct Debit |
| January–March 2027 | £2,154 | MSE’s average of supplier forecasts, rounded; not confirmed |
| Exactly 25% above £1,723 | £2,153.75 | Arithmetic illustration, not a separate prediction |
The January figure is an annualised comparison for a three-month cap period. It is neither a bill for those three months nor a guarantee of the total you will pay throughout 2027. Sources: EDF’s current-cap explanation and MSE’s dated forecasts.
Energy price cap forecast: 7 checks before you decide
1. Is the energy price cap definitely going up 25%?
No. The widely shared increase is a forecast, not an announced Ofgem decision. MSE’s average of three supplier forecasts is around 25%, but market conditions can change before the final calculation. Treat the percentage as a planning scenario rather than a promise about your own bill.
There are two separate questions here: whether rates are likely to rise, and exactly what the new rates will be. An indication of the first does not settle the second. I would avoid headlines saying every household “will pay” a particular amount.
Nor would I assume each gas unit rate, electricity unit rate and standing charge will increase by the same percentage. A headline typical-use change combines several components. The mix of energy you use matters.
2. How much is the energy price cap going up in January?
The final January change is not yet known. The forecast table above gives the dated prediction, while Ofgem says the January–March 2027 cap will be announced by 25 November 2026. Until then, keep “forecast” beside any January figure you share.
The arithmetic also needs care. Exactly 25% above £1,723 is £2,153.75, an increase of £430.75. By contrast, moving from £1,723 to £2,100 is about 21.9%, not 25%. The figures in a headline must describe the same comparison.
That distinction matters when you are deciding how much breathing room to leave in a budget. A rounded headline is useful for awareness; an actual tariff comparison needs the rates and terms offered to you.
3. How much will a 25% increase add to my monthly bill?
For a simple planning illustration, multiply your comparable energy cost by 0.25. A £100 monthly equivalent would increase by £25; £150 by £37.50; and £200 by £50. These are hypothetical calculations, not predictions of your supplier’s Direct Debit.
Using the typical-use illustration, £430.75 divided by twelve is approximately £35.90 a month. This is an annual average. It does not mean your January payment must rise by that amount, or that winter consumption will be evenly spread across the year.
Your account balance, meter readings and expected usage can also affect a payment review. If a new payment looks wrong, ask the supplier for the usage assumptions and calculation. Keep a copy so you can compare it with your own records.
Use my flexible household budgeting guide to make space for a scenario without treating it as a final bill. The calculator collection can help you review the rest of your budget.
4. Should I fix my energy bills now or wait until January?
Compare now, but do not choose a fix solely because of a frightening forecast. A useful offer should make sense for your annual usage, its full term and any exit fees. Ask what you would pay today and what risks you accept if variable rates later fall.
A fix can make the price of your energy more predictable. It cannot guarantee that it will be the cheapest choice in hindsight. Equally, waiting keeps flexibility but leaves you exposed to future variable-rate changes.
I would write down three reasons before accepting an offer: the estimated cost using my usage, why the commitment suits my household, and what it would cost to leave. If any answer is unclear, I would ask for the tariff terms before agreeing.
Do not use “anything less than 25% above today’s rates is a good deal” as a shortcut. A fix can extend beyond January’s quarter, and forecasts for later periods may differ. Comparing one quarter’s prediction with a whole-year contract can give a misleading answer.
Ofgem’s switching guide explains what information to gather and confirms that your current supplier may have a suitable option too.
5. How to check if a fixed deal is actually worth it
Start with your latest annual usage in kWh, separately for gas and electricity. Compare every quote on that same basis. Using a different household size or estimated usage in each comparison makes the monthly numbers difficult to interpret.
- Record both unit rates. Note the gas and electricity prices in pence per kWh.
- Record both standing charges. Note the daily charge for each fuel, including the tax treatment shown in the quote.
- Calculate the annual illustration. Multiply usage by the relevant unit rate, divide pence by 100, then add each daily standing charge multiplied by 365 and divided by 100.
- Add applicable fees. Include any charge for leaving your present deal when assessing the benefit of switching.
- Read the new commitment. Check its end date, exit fees, discounts and any conditions attached to the quoted rates.
- Save the evidence. Keep the tariff document and comparison date.
Formula: annual usage cost + annual standing charges + applicable switching costs. This compares quoted tariffs at the stated usage; it does not predict future variable rates.
A cheaper monthly payment is not enough evidence on its own. Ask whether it is based on the same consumption, whether account credit is included, and whether an introductory discount expires. Write the answers beside the quote rather than trying to remember them.
A worked comparison: the lower unit rate can still cost more
Fictional example, not a live tariff: suppose a household uses 2,000 kWh of electricity a year. Offer A charges 25p/kWh plus a 60p daily standing charge. Offer B charges 26p/kWh plus a 45p daily standing charge. Assume both quotes include applicable taxes on the same basis and neither has an introductory discount.
| Electricity illustration | Offer A | Offer B |
|---|---|---|
| Annual usage charge | £500 | £520 |
| Annual standing charge | £219 | £164.25 |
| Annual total | £719 | £684.25 |
Offer B costs £34.75 less in this illustration, despite its higher unit rate. But if switching from A to B triggered a £50 exit fee, the first-year total would be £734.25: £15.25 more than staying on A, assuming unchanged rates and usage for that comparison year. This is why I would compare the whole cost rather than a single attractive rate.
For dual fuel, repeat the calculation for gas and add both totals. These invented rates teach the method; they are not recommended offers or a prediction of January prices.
6. What will my energy bills be in 2027?
There is no reliable single bill figure for every household or the whole year. The cap is reviewed quarterly, while your cost depends on your tariff and consumption. A forecast for January–March cannot tell you what you will pay across all twelve months.
The Ofgem cap explanation describes how unit rates and standing charges work. It covers default tariffs in Great Britain; Northern Ireland has different energy regulation. Fixed tariffs, heating oil and heat networks also need separate treatment.
For planning, make a small range of scenarios rather than one exact promise. Keep your usage consistent between them. Label the worksheet “illustration”, write the date beside it, and replace assumptions when confirmed rates become available.
Then focus on changes you can control. My energy-saving guide covers usage, while reviewing recurring subscriptions and reviewing TV spending can reveal other budget choices. These are options, not an assumption that every household has spare spending to cut.
7. What if I cannot afford my energy bills?
Contact your supplier before the situation becomes harder to manage. Explain what you can afford and ask about a payment review, repayment arrangements and hardship support. Ofgem lists the help you can request, including supplier schemes and routes to independent advice.
Prepare a short list before making contact: your account number, recent readings, current payment, balance, and the amount you can realistically manage. Ask for the outcome in writing. If you do not understand an offer, say so and request an explanation before agreeing.
Check my free money help guide for further starting points. If several bills are becoming unmanageable, seek free debt guidance through MoneyHelper or Citizens Advice. Borrowing to cover an unaffordable ongoing payment can create another problem rather than resolve it.
Try the energy price cap calculator as a starting point, checking its date and assumptions before relying on the output. For a live fixed offer, use the supplier’s quoted rates in the comparison method above.
What I’d do first
I would open the latest bill, identify whether the tariff is fixed or variable, and write down annual kWh usage. Next I would compare a small number of suitable offers on the same basis. Only then would I decide whether the cost and commitment suit the household.
If money is already tight, contacting the supplier comes before finding the perfect comparison. A spreadsheet is useful, but it should not delay asking for help.
For the wider picture, see my money makeover guide, emergency buffer guide, and food-shopping savings guide. Take the parts that fit your circumstances.
Energy price cap forecast FAQs
Is the energy price cap definitely going up 25%?
No. That is a rounded forecast, not a confirmed Ofgem announcement. Keep the forecast date attached to the figure and check the final January rates when they are published. Your own change depends on your tariff and energy use.
How much will a 25% increase add to my monthly bill?
As an illustration, 25% of a £150 monthly equivalent is £37.50. That calculation assumes comparable usage and costs. It does not determine your Direct Debit, which can also reflect account credit, debt and your supplier’s consumption estimate.
Does a fixed tariff fix my monthly payment?
A fixed tariff generally fixes the agreed rates for its term, rather than guaranteeing a total bill. Using more energy can still increase the amount you owe. Read the tariff document and ask the supplier to explain how your monthly payment is calculated.
Does this price cap apply across the whole UK?
No. Ofgem’s domestic cap applies in England, Scotland and Wales. Northern Ireland has a different regulatory system. Also check whether your supply is on a default tariff: a fixed deal, heating oil or a heat network should not be assessed as though it were the same arrangement.
Energy price cap forecast: summary
- Separate the dated forecast from confirmed rates.
- Use consistent arithmetic and annualised comparisons.
- Compare offers with your own kWh usage, standing charges and fees.
- Remember that fixing rates does not guarantee a total bill.
- Ask for support early if payments are unaffordable.
Which part of your energy bill is hardest to understand: the tariff, the standing charge or the monthly payment?
Sources and checks
- Ofgem: current cap period and next announcement
- MSE: supplier forecasts, updated 15 October 2026
- EDF: current benchmark and forecast uncertainty
- Ofgem: cap and standing charges explained
- Ofgem: comparing and switching
- Ofgem: help with bills
I’m not a financial adviser; this is general information. Forecasts and offers can change. Read the financial disclaimer.
About the author: Dr Kalpana Govindaraasan is a PhD scientist, former secondary science teacher and mum, living in the UK since 2008. MoneySavvyUK shares practical household money information with sources readers can check.