| Energy Bills |
Dual fuel is a single energy contract covering both gas and electricity from one supplier. In 2026, the typical dual fuel bill under the price cap is £1,663. It simplifies billing but does not guarantee a cheaper deal. The key figure is 84.5p.
Dual fuel means getting gas and electricity from the same supplier, often with one bill, but it is not always the cheapest option.
KEY FACTS
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LAST REVIEWED 2026-09-06
What does dual fuel mean?
Dual fuel is an energy supply arrangement where a single supplier provides both gas and electricity to a household. Instead of managing two separate contracts, the customer receives one bill covering both fuels. This is a common setup in the UK, offered by most major energy companies.
The main benefit is convenience: one point of contact for customer service, one bill, and often a single direct debit. However, dual fuel does not automatically mean a cheaper tariff. Suppliers may offer a discount for combining fuels, but this is not always the case. In 2026, the typical dual fuel bill under the price cap is £1,663 per year, based on a medium-use household.
When comparing energy deals, it is important to check the total cost of a dual fuel tariff against separate tariffs from different suppliers. Sometimes, splitting gas and electricity between two suppliers can be cheaper, especially if one supplier offers a particularly low rate for one fuel. The price cap sets a maximum rate per unit and standing charge, but suppliers can set their own prices below that cap.
To understand what a dual fuel deal actually costs, look at the annual usage in kilowatt-hours (kWh) and the unit rates and standing charges. The typical domestic consumption values are 2,500 kWh for electricity and 9,500 kWh for gas. Using these figures, the annual cost can be estimated.
How does dual fuel work?
Dual fuel works by having one energy supplier for both gas and electricity. The supplier reads both meters, sends a single bill, and handles any issues for both fuels. The customer signs one contract, which may last for a fixed term or be variable.
In practice, the supplier buys gas and electricity from wholesale markets and sells them to the household. The bill is calculated based on the unit rates for each fuel and the standing charges. For example, under the October to December 2026 price cap, the average standing charge for electricity is 54.8p per day, and for gas it is 29.7p per day. Together, that is 84.5p per day for dual fuel.
The price cap is set by Ofgem and limits the maximum amount suppliers can charge for each unit and standing charge. The cap is reviewed every three months. In 2026, the cap for a typical dual fuel household is £1,663 from July to September, rising to £1,723 from October to December, an increase of 4%.
When a household chooses dual fuel, the supplier may offer a single direct debit for both fuels, which can make budgeting easier. However, the actual cost depends on usage and the specific tariff.
| Cap period | Typical dual fuel, Direct Debit | Change | Source |
|---|---|---|---|
| Jul to Sep 2026 | £1,663 | Ofgem | |
| Oct to Dec 2026 | £1,723 | 4% | Ofgem |
| From 1 Jan 2027 | to be announced late November 2026 | Ofgem |
What is the typical dual fuel bill in 2026?
In 2026, the typical dual fuel bill under the Ofgem price cap is £1,663 per year for a household using 2,500 kWh of electricity and 9,500 kWh of gas, paying by direct debit. This figure applies from July to September 2026.
From October to December 2026, the cap rises to £1,723, an increase of 4%. This means the typical bill will be higher in the winter months. The price cap is set by Ofgem and is based on the wholesale cost of energy, network costs, and other charges.
It is important to note that the price cap is not a cap on the total bill, but on the unit rates and standing charges. If a household uses more energy than the typical consumption, the bill will be higher. Conversely, using less energy will result in a lower bill.
For households on a dual fuel tariff, the standing charges are also capped. From October to December 2026, the average standing charge for electricity is 54.8p per day, and for gas it is 29.7p per day. These charges cover the cost of connecting to the grid and maintaining the network.
How is the dual fuel price cap calculated?
The dual fuel price cap is calculated by Ofgem based on the costs that energy suppliers incur to provide gas and electricity to a typical household. These costs include wholesale energy, network charges, operating costs, and policy costs.
For a typical dual fuel household, the cap is expressed as an annual bill for a medium-use household. In 2026, the cap is £1,663 for July to September, and £1,723 for October to December. The 4% increase reflects higher wholesale prices in the winter.
The cap also sets maximum daily standing charges. For electricity, the average standing charge is 54.8p per day, and for gas it is 29.7p per day. These are averages across the UK, as actual charges vary by region.
To calculate the cap, Ofgem uses a typical domestic consumption value (TDCV) of 2,500 kWh for electricity and 9,500 kWh for gas. These figures are used to estimate the annual bill for a medium household. The cap is reviewed every three months to reflect changes in wholesale prices.
What are the standing charges for dual fuel?
Standing charges are fixed daily fees that cover the cost of connecting to the energy network, even if no energy is used. For dual fuel, the standing charges for electricity and gas are added together.
Under the October to December 2026 price cap, the average standing charge for electricity is 54.8p per day, and for gas it is 29.7p per day. Together, that is 84.5p per day for dual fuel. This means a household pays this amount every day, regardless of usage.
Standing charges vary by region and payment method. The figures above are averages. Some suppliers may charge more or less, but they cannot exceed the cap.
It is also important to note that VAT is applied to energy bills. Electricity has a reduced VAT rate of 0% until 31 March 2027, while gas has a standard reduced rate of 5%. This means that the standing charge for electricity does not include VAT, but the gas standing charge does.
Dual fuel vs separate suppliers: which is cheaper?
Dual fuel means having one supplier for both gas and electricity, while separate suppliers means having different companies for each fuel. The cost difference depends on the tariffs available.
In 2026, the typical dual fuel bill under the price cap is £1,663. However, some suppliers offer discounts for dual fuel, which can make it cheaper than separate tariffs. But this is not always the case. It is possible that one supplier offers a very low electricity rate, and another offers a low gas rate, making separate contracts cheaper overall.
To compare, a household should look at the unit rates and standing charges for each fuel. For example, if a separate electricity supplier charges a lower standing charge than the average 54.8p per day, and a separate gas supplier charges a lower standing charge than 29.7p per day, then the total might be less than the dual fuel average of 84.5p per day.
However, separate suppliers mean managing two bills and two customer service contacts. Some households prefer the convenience of dual fuel, even if it costs slightly more. The best choice depends on individual usage and the tariffs available at the time.
| Fuel | Average standing charge (Oct to Dec 2026) | VAT / share | Source |
|---|---|---|---|
| Electricity | 54.8p per day | 0% VAT to 31 Mar 2027 | Commons Library |
| Gas | 29.7p per day | 5% VAT | Commons Library |
| Dual fuel | 84.5p per day | 18% of a typical bill | Commons Library |
What are the pros and cons of dual fuel?
Dual fuel has several advantages. It simplifies billing by providing one bill for both gas and electricity. It also means one point of contact for customer service, which can make it easier to resolve issues. Some suppliers offer a discount for dual fuel, which can reduce the overall cost.
However, there are also disadvantages. Dual fuel may not always be the cheapest option. If a household uses a lot of electricity but little gas, a specialist electricity supplier might offer a better rate. Also, if one supplier has poor customer service, the household is stuck with them for both fuels.
In 2026, the typical dual fuel bill is £1,663, but this is just an average. The actual cost depends on usage and tariff. It is important to compare dual fuel deals with separate deals to see which is more cost-effective.
Another consideration is flexibility. With separate suppliers, a household can switch one fuel without affecting the other. With dual fuel, switching means changing both at once, which might be more complicated if one fuel is in a fixed contract.
How to switch to a dual fuel tariff?
Switching to a dual fuel tariff is straightforward. A household can compare deals online or contact suppliers directly. The process involves signing a new contract with a supplier that provides both gas and electricity.
Before switching, it is important to check the current tariff and any exit fees. The new supplier will handle the switch, and the process usually takes about 17 days. The supply will not be interrupted.
When comparing dual fuel deals, look at the total annual cost for the household's usage. Use the typical consumption figures of 2,500 kWh for electricity and 9,500 kWh for gas as a starting point. Also, consider the standing charges, as these can vary.
In 2026, the price cap sets a maximum for standard variable tariffs. If a household is on a standard variable tariff, they are already on a capped deal. Switching to a fixed dual fuel deal might offer a lower price, but it could also be higher. It is essential to compare the unit rates and standing charges.
What is the future of dual fuel in 2027?
The future of dual fuel in 2027 will be influenced by government policies and market changes. The price cap for January 2027 is to be announced in late November 2026. This will set the maximum rates for the first quarter of 2027.
There are also changes to VAT on electricity. The temporary 0% VAT rate is set to end on 31 March 2027, after which it may revert to 5%. This could increase the cost of electricity for dual fuel households.
Additionally, the UK is moving towards cleaner energy sources. This may affect the way energy is priced and sold. For example, there could be more incentives for using electricity over gas, which might change the economics of dual fuel.
Households should keep an eye on announcements from Ofgem and the government. The price cap is reviewed every three months, so costs can change. It is always a good idea to review energy deals regularly to ensure the best value.
How does dual fuel affect your energy bill?
Dual fuel affects the energy bill by combining the costs of gas and electricity into one statement. The bill will show the electricity usage in kWh and the gas usage in kWh, along with the unit rates and standing charges for each.
In 2026, the typical dual fuel bill is £1,663, but this is based on average usage. If a household uses more energy, the bill will be higher. The standing charges are also a significant part of the bill.
The bill also includes VAT. Electricity has a reduced VAT rate of 0% until 31 March 2027, while gas has a reduced rate of 5%. This means that the electricity portion of the bill is currently tax-free, but this may change.
To manage the bill, it is important to understand the charges. The unit rate is the cost per kWh of energy used. The standing charge is a fixed daily fee. By reducing energy usage, a household can lower the variable part of the bill, but the standing charge remains the same.
Glossary: the terms on an energy bill explained
Dual fuel: An energy supply where one supplier provides both gas and electricity to a household, often with a single bill.
Price cap: A limit set by Ofgem on the maximum unit rates and standing charges that suppliers can charge for standard variable tariffs.
Standing charge: A fixed daily fee that covers the cost of connecting to the energy network, regardless of usage.
Unit rate: The cost per kilowatt-hour (kWh) of energy used, which is multiplied by the amount of energy consumed.
Typical domestic consumption value (TDCV): A standard annual usage figure used for comparison, set at 2,500 kWh for electricity and 9,500 kWh for gas.
VAT: Value Added Tax, a consumption tax added to energy bills. Electricity has a reduced rate of 0% until 2027, gas has 5%.
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Disclaimer. This guide is editorial information drawn from primary sources. It is not financial, legal or tax advice and does not recommend any provider. Figures are those published by the named sources on the review date and may change. Kael Tripton Ltd receives no commission, referral fee or lead payment from any provider named on this page. |
Frequently asked questions
What does dual fuel mean?
Dual fuel means getting both gas and electricity from the same energy supplier. Instead of having separate contracts for each fuel, you have one supplier, one bill, and one point of contact. This can simplify billing and customer service. In 2026, the typical dual fuel bill under the price cap is £1,663 per year, based on average usage.
Is dual fuel cheaper than separate suppliers?
Dual fuel is not always cheaper. Some suppliers offer a discount for combining gas and electricity, but this is not guaranteed. In some cases, separate suppliers might offer lower rates for each fuel. To compare, look at the total annual cost for your usage. The typical dual fuel bill in 2026 is £1,663, but separate deals could be lower or higher.
What is the average standing charge for dual fuel?
The average standing charge for dual fuel under the October to December 2026 price cap is 84.5p per day. This is the sum of the electricity standing charge of 54.8p per day and the gas standing charge of 29.7p per day. These charges are fixed daily fees that cover network costs.
How much is the energy price cap for dual fuel in 2026?
The energy price cap for a typical dual fuel household in 2026 is £1,663 per year from July to September, and £1,723 per year from October to December. These figures are based on a household using 2,500 kWh of electricity and 9,500 kWh of gas, paying by direct debit.
What is the VAT rate on dual fuel bills?
The VAT rate on electricity is currently 0% until 31 March 2027, while gas has a reduced rate of 5%. This means that on a dual fuel bill, the electricity portion is tax-free, but the gas portion includes 5% VAT. This can affect the total cost.
Can I switch to a dual fuel tariff?
Yes, you can switch to a dual fuel tariff at any time. Compare deals from different suppliers, check for exit fees on your current tariff, and then sign up with a new supplier. The switch usually takes about 17 days and there is no interruption to your supply.
