Last reviewed: 10th January 2025
To help find the cheapest energy supplier, we have manually gone to every provider’s website to get a quote and compare gas and electricity using the same criteria* for each.
This means we can give you a quick overview of the cheapest gas and electricity prices across all energy suppliers in the UK right now for January 2025.
We’ve broken the tariffs down into two tables, one showing the cheapest fixed tariffs available and the other the cheapest variable tariffs.
Our top rated supplier Octopus Energy is currently offering £50 credit to any new customer that uses our referral link. Click below to see why we rate them so highly and get your £50.
For those wanting a quick answer, we have summarised the cheapest suppliers for gas and electricity based on current prices below:
- Cheapest fixed gas and electricity (from a big-name supplier): Octopus Energy at £139 per month (with credit included)
- Cheapest variable gas and electricity: Tulo Energy at £139 per month
- Cheapest variable gas and electricity (from a big-name supplier): Scottish Power at £140 per month
*These prices are based on the average energy usage of a 3-bedroom house in the East Midlands for dual fuel, paying by direct debit. You will likely get a different estimate with your own details.
Cheapest fixed tariff prices – best deals (January 2025)
In this table, we have compared all fixed tariffs we could find that are currently available to new customers. A few things to note with this:
- Some of these suppliers may offer other incentives, e.g. Sainsbury’s offer Nectar points.
- There are different exit fees between different suppliers
- The cheapest supplier is not necessarily the best, so please check reviews before switching.
This tariff also includes no exit fees. So you can switch for free whenever you like.
The full list of fixed, dual fuel tariffs is below:
Supplier Name | Tariff Name | Tariff Length | Cost Per Month | Cost Per Year | Early Exit Fee |
---|---|---|---|---|---|
Outfox The Market | Fix’d Dual Jan25 v1.0 | 12 months | £140 | £1,684 | £50 |
British Gas | Fixed Tariff v21 | 12 months | £140 | £1,686 | £100 |
E.ON Next | Next Fixed 18m v15 | 18 months | £141 | £1,687 | £100 |
Outfox The Market | 18 – Month Fix’d Dual Jan25 v2.0 | 18 months | £141 | £1,687 | £50 |
EDF Energy | Simply Fixed 2Yr Jan27v4 | until 31 Jan 2027 | £141 | £1,688 | £150 |
EDF Energy | Simply Fixed Direct 1Yr Jan26v8 | until 31 Jan 2026 | £141 | £1,691 | £0 |
EDF Energy | Simply Fixed 1Yr Jan26v8 | until 31 Jan 2026 | £141 | £1,691 | £50 |
Utility Warehouse | UW Fixed 36 | until 31 Dec 2025 | £142 | £1,699 | £150 |
Outfox The Market | 2-year Fix’d Dual Jan25 v1.0 | 24 months | £142 | £1,701 | £140 |
So Energy | So Wisteria Two Year – Green | 24 months | £142 | £1,708 | £150 |
British Gas | The Longer Fix v18 | 24 months | £143 | £1,711 | £150 |
Octopus Energy | Octopus 14M Fixed January 2025 v1 | 14 months | £143 | £1,717 | £0 |
Co-op Energy | Co-op 14M Fixed January 2025 v1 | 14 months | £143 | £1,717 | £0 |
Sainsbury’s Energy | Sainsburys Fix and Reward Fixed 18M V10 | 18 months | £143 | £1,718 | £100 |
E.ON Next | Next Fixed 12m v42 | 12 months | £143 | £1,720 | £100 |
Sainsbury’s Energy | Sainsburys Fix and Reward Fixed 12m V39 | 12 months | £145 | £1,739 | £100 |
E.ON Next | Next Gust 12m V16 | 12 months | £145 | £1,741 | £100 |
OVO Energy | Extended Fixed 09 January 2025 | 18 months | £146 | £1,747 | £150 |
So Energy | So Wisteria One Year – Green | 12 months | £146 | £1,752 | £100 |
OVO Energy | 1 Year Fixed 09 January 2025 | 12 months | £146 | £1,754 | £100 |
E.ON Next | Next Fixed 24M V27 | 24 months | £147 | £1,765 | £200 |
Sainsbury’s Energy | Sainsburys Fix and Reward Fixed 24M V27 | 24 months | £149 | £1,784 | £200 |
Co-op Energy | Co-op Community Power 14M Fixed January 2025 v1 | 14 months | £149 | £1,785 | £0 |
OVO Energy | 2 Year Fixed + Heating Control 09 January 2025 | 24 months | £151 | £1,807 | £190 |
Ebico | Ebico Prime 12 | 12 months | £152 | £1,826 | £100 |
OVO Energy | 1 Year Fixed + Greener Electricity 09 January 2025 | 12 months | £153 | £1,834 | £100 |
Ebico | Ebico Signature | 12 months | £167 | £2,000 | £100 |
100Green | Sparkling Fixed – December 25 | until 31 Dec 2025 | £168 | £2,016 | £0 |
100Green | Eko Energy 2025 | until 31 Mar 2025 | £171 | £2,058 | £0 |
Cheapest variable tariff prices – best deals (January 2025)
We have compared all the variable tariffs we could find that are currently available to new customers. A few things to note with this:
- Some of these suppliers may offer other incentives, e.g. Sainsbury’s offer Nectar points.
- The cheapest supplier is not necessarily the best, so please check reviews before switching.
- All of the variable tariffs have no exit fees
You can see the full list of variable, dual fuel tariffs below:
Supplier Name | Tariff Name | Cost Per Month | Cost Per Year |
---|---|---|---|
Tulo Energy | Vari-One | £139 | £1,666 |
ScottishPower | Help Beat Cancer Flexi Jun 2026 TM3 | £140 | £1,685 |
E.ON Next | Next Pledge Tracker 12m V7 | £143 | £1,712 |
EDF Energy | Simply Tracker Mar26 | £143 | £1,715 |
Utility Warehouse | Double Gold | £143 | £1,715 |
Tulo Energy | SVT | £145 | £1,743 |
Utility Warehouse | Gold | £145 | £1,745 |
Octopus Energy | Flexible Octopus | £146 | £1,750 |
So Energy | So Flex | £147 | £1,763 |
Ebico | Ebico Standard | £147 | £1,764 |
OVO Energy | Simpler Energy | £147 | £1,764 |
Good Energy | Good Energy Standard | £147 | £1,764 |
Good Energy | Good Energy Deemed DD | £147 | £1,764 |
Utility Warehouse | Value | £147 | £1,764 |
Utilita | Smart Energy | £147 | £1,765 |
ScottishPower | Standard | £147 | £1,765 |
British Gas | Standard Variable | £147 | £1,765 |
EDF Energy | Standard (Variable) | £147 | £1,765 |
Sainsbury’s Energy | Sainsbury€™s Standard Variable | £147 | £1,765 |
Sainsbury’s Energy | Sainsburys Track and Reward 12m v1 | £147 | £1,765 |
Outfox The Market | Fox Standard Dual | £147 | £1,765 |
Home Energy | Fair Variable Dual | £147 | £1,765 |
100Green | Sparkling SVT | £166 | £1,987 |
Ecotricity | Standard Variable Green Tariff | £173 | £2,080 |
All the energy suppliers offer similar rates on their variable tariffs due to the price cap, and these are generally more expensive than the Fixed tariffs available. Tulo Energy offers the cheapest dual fuel tariff (using our criteria), which is about £139 per month. This is the cheapest tariff overall and is less than the cheapest fixes (if you don’t include referral credit).
Two that stand out at the higher end, however, are Ecotricity and 100Green. This is because they offer green gas, which makes them more expensive. If you are looking for the greenest suppliers, they are worth considering. We also have a guide on the best green energy suppliers in the UK.
Calculate your energy bills
If you know your annual gas and electricity usage, then you can use our energy bill calculator to work out how much each of these tariffs would cost you compared to your existing tariff.
What is the energy price cap and how does it impact each type of tariff?
The energy price cap is a limit set by Ofgem, the energy regulator, on how much suppliers can charge customers on standard variable tariffs for their energy. The latest price cap came into affect on January 1st 2025.
It’s designed to protect consumers from excessive charges, especially those who do not actively shop around for better deals.
The price cap directly impacts variable rate tariffs by capping the maximum price suppliers can charge.
Fixed rate tariffs are not directly affected by the price cap, as their prices are set for the duration of the contract.
What is a fixed rate tariff and how does it work?
A fixed rate tariff is an energy tariff where the price you pay for each unit of electricity or gas remains the same throughout the contract period, typically one or two years.
This means that even if energy market prices go up or down, your rates stay constant.
It works by locking in a specific rate when you sign up, providing you with stable and predictable bills. This stability can make budgeting easier since you know what you’ll be paying each month, regardless of external price fluctuations.
What is a variable rate tariff and how does it work?
A variable rate tariff is an energy tariff where the price you pay for each unit of electricity or gas can change over time, usually in response to shifts in the energy market.
If wholesale energy prices rise, your rates might increase; if they fall, your rates could decrease. This type of tariff offers flexibility and the potential to benefit from lower prices, but it also carries the risk that your energy costs could go up unexpectedly.
Unlike fixed tariffs, variable rates fluctuate and are often tied to the broader market conditions.
What are the main differences between fixed and variable rate tariffs?
The main difference between fixed and variable rate tariffs lies in how the prices are set and how they change over time.
Fixed rate tariffs keep your energy prices stable for the duration of the contract, providing certainty in your monthly bills. They do however often include Exit Fees, which you may have to pay to leave the tariff early.
In contrast, variable rate tariffs can change depending on the market, which means your bills can go up or down.
Fixed tariffs offer stability and predictability, while variable tariffs offer flexibility and the potential to take advantage of lower market prices.
Why should I choose a fixed rate tariff over a variable rate tariff?
You might choose a fixed rate tariff over a variable rate tariff if you prefer stability and predictability in your energy bills.
With a fixed rate tariff, you lock in your energy price for a set period, protecting yourself from potential price hikes in the energy market.
This can be especially beneficial during times of rising energy costs, as it shields you from sudden increases.
If budgeting is important to you and you want to avoid the risk of fluctuating bills, a fixed-rate tariff is a solid choice.
How do exit fees work for both types of tariffs?
Exit fees are charges you might have to pay if you leave your energy contract before it ends.
These fees are more common for fixed-rate tariffs because the supplier has agreed to provide energy at a certain price for a set period. If you leave early, the supplier may charge an exit fee to cover the costs associated with your early departure. They are often between £50-150 per fuel.
Variable rate tariffs, on the other hand, do not tend to have exit fees, as they don’t lock you into a set rate.
When might I have to pay exit fees with fixed and variable tariffs?
If you decide to switch to a different tariff or supplier before your contract ends, you might have to pay exit fees with a fixed-rate tariff.
These fees compensate the supplier for the potential loss they incur from your early departure. With variable-rate tariffs, exit fees are less common but can still apply, especially if you switch tariffs within a certain period after signing up.
Always check the terms of your contract to understand when exit fees might be charged.
What is the best way to compare fixed and variable tariffs?
The best way to compare fixed and variable tariffs is to use online comparison tools that allow you to see the current rates and terms offered by different suppliers.
Look at the price per unit of energy, the length of the contract, and any additional fees like exit charges.
It’s also important to consider your own preferences, such as whether you value price stability or are comfortable with some level of risk.
Comparing the overall cost and potential benefits of each type will help you decide which is the better fit for you.
What factors should I think about before switching from a variable to a fixed rate tariff, or vice versa?
Before switching from a variable to a fixed rate tariff, or vice versa, consider your financial situation and risk tolerance. If you prefer stability and predictability in your bills, a fixed rate might be better.
However, if you’re open to the possibility of fluctuating bills and want the chance to benefit from lower prices, a variable rate could be more suitable. Also, consider the current market trends – if prices are expected to rise, fixing your rate might be a smart move.
Finally, check if there are any exit fees associated with switching and weigh the costs against the potential savings.
How often should I review the tariff I am on?
It’s a good idea to review the tariff you are on at least once a year or whenever your current contract is about to end.
Energy markets can change, and new tariffs might become available that offer better rates or more favourable terms. Regularly checking your tariff ensures that you are not overpaying and that you have the most suitable plan for your needs.
Even if you’re on a fixed rate, it’s worth looking around a few months before your contract ends to explore your options.
What happens if market prices drop significantly after you choose a fixed-rate tariff?
If market prices drop significantly after you choose a fixed rate tariff, you won’t benefit from the lower prices because your rate is locked in for the duration of the contract. This is one of the risks of choosing a fixed rate.
You’ll continue paying the rate you agreed to, even if cheaper rates become available. If the savings from a lower rate outweigh the exit fees, you might consider switching, but otherwise, you’re committed to your fixed rate until the contract ends.
How responsive are variable rate tariffs to changes in the energy market?
Variable rate tariffs are directly responsive to changes in the energy market, which means your rates can go up or down based on market conditions.
If energy prices increase, your tariff rates are likely to rise as well, leading to higher bills.
Conversely, if prices fall, your rates should decrease, offering potential savings. This responsiveness can be both a benefit and a risk, depending on the direction of the market changes.
Can combining both tariff types save me money?
Combining both tariff types isn’t typically possible within a single energy account, as you generally have to choose between a fixed or variable tariff for your entire energy supply.
However, you could theoretically balance the benefits and risks by having one type of tariff for your electricity and another for your gas, if your supplier allows it.
Alternatively, you could consider splitting energy supplies across multiple properties if you have them. This strategy could potentially balance stability with the flexibility to benefit from market changes, but it requires careful management and might not be available with all suppliers.
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