Cheapest Dual Fuel Energy Suppliers in the UK
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Find a cheaper dual fuel deal for your home
Dual fuel tariffs combine your gas and electricity with a single supplier and one monthly bill. Choosing the cheapest dual fuel energy supplier for your home can cut your costs, simplify your admin, and give you access to exclusive discounts for taking both fuels together.
With wholesale prices changing and new suppliers entering the market, the cheapest option today may not be the cheapest in six months. Our comparison tools help you quickly check which providers currently offer the best-value tariffs for your postcode and usage, so you never overpay for your energy.
- Compare live dual fuel deals from leading UK suppliers
- See estimated annual savings before you switch
- Switch online in minutes, no paperwork or hassle
- No disruption to your supply — same pipes, same cables
Get your cheapest dual fuel quote
Tell us a few details about your home and we'll help you find a cheaper gas and electricity deal.
What is a dual fuel energy tariff?
A dual fuel tariff means you buy both your gas and electricity from the same supplier. You still receive two separate meter readings, but you get a single combined bill and often a discount worth £30–£60 a year compared with taking separate deals.
You can usually choose between fixed rate and variable rate dual fuel tariffs:
- Fixed rate dual fuel — your unit rates and standing charges are locked in for 12–24 months. Your bills can still change with your usage, but the price you pay per kWh stays the same for the length of the fix.
- Variable dual fuel — your rates can move up or down, typically in line with the Ofgem price cap and wholesale market costs. These tariffs are usually more flexible and have no exit fees.
The cheapest option depends on your household usage, payment method, region, and how prices are forecast to move. That's why using an independent comparison before you switch is so important.
Typical dual fuel savings
- Save up to £300+ per year by switching from a standard variable tariff*
- Extra discounts for paying by Direct Debit
- Online-only tariffs often come with the lowest unit rates
*Savings are indicative and depend on property size, location and current tariff. Always compare against your exact usage.
Who are the cheapest dual fuel suppliers in the UK?
The cheapest dual fuel supplier for your home will vary over time and by region. The UK energy market is regulated by Ofgem, but each supplier sets its own tariffs within those rules.
Well-known brands that often offer competitive dual fuel tariffs include:
- British Gas
- Octopus Energy
- OVO Energy
- EDF Energy
- E.ON Next
- ScottishPower
- Shell Energy and smaller regional suppliers
Smaller, challenger brands can sometimes undercut the Big Six with cheaper online-only tariffs, but their prices and availability can change quickly. The best way to be sure is to run a personalised comparison using your postcode and recent bill.
What affects which supplier is cheapest?
- Region: Network and distribution costs vary across the UK.
- Usage: High and low users may see different suppliers at the top of the table.
- Payment method: Direct Debit is usually cheaper than paying on receipt of bill.
- Online billing: Managing your account online can unlock additional discounts.
- Contract length: Longer fixes occasionally come with slightly lower prices.
Types of cheap dual fuel tariffs
| Tariff type | Best for | Key benefits | Things to watch out for |
|---|---|---|---|
| Fixed rate dual fuel | Households wanting price certainty | Protection from price rises, easier budgeting | Exit fees if you leave early, may miss price drops |
| Standard variable | Flexibility and no exit fees | Can switch any time, prices can fall as well as rise | Often more expensive than the cheapest fixes over time |
| Online-only dual fuel | Confident online bill payers | Some of the cheapest dual fuel deals on the market | No paper bills, self-service account management |
| Green / renewable dual fuel | Eco-conscious households | Backed by renewable electricity, often carbon-offset gas | Can be slightly more expensive but prices are increasingly competitive |
| Economy 7 / multi-rate | Homes using more energy at night | Cheap off-peak electricity for storage heaters & EV charging | Day rate can be higher, savings depend on your usage pattern |
How to switch to a cheaper dual fuel supplier
- Grab a recent bill — this gives your current tariff name, unit prices and annual usage in kWh.
- Compare dual fuel deals — use our quick form above to see the cheapest tariffs based on your exact usage.
- Choose your new supplier — review prices, contract lengths, exit fees, payment methods and any green credentials.
- Confirm the switch online — enter a few personal and meter details to start the transfer.
- Take opening meter readings — when asked, submit accurate readings so your old and new suppliers bill correctly.
- Wait for the switch to complete — this normally takes 5–21 days. Your gas and electricity will carry on as normal throughout.
You won't experience any loss of supply. The only change is who bills you and how much you pay. The physical pipes, cables and meters stay exactly the same.
When is the best time to switch?
You can normally switch at any time, but the best moment is often:
- When your current fixed deal is about to end
- If you've been moved to your supplier's standard variable tariff
- After a price rise has been announced
- If your circumstances change and your usage goes up or down
Check for exit fees before leaving a fixed tariff early. Many suppliers waive these within 49 days of your contract end date.
Is dual fuel always the cheapest option?
Dual fuel deals often come with a discount for taking gas and electricity together, but they are not always the absolute lowest-cost option. In some cases, the cheapest route can be to choose different suppliers for each fuel.
Our comparison makes it easy to see the difference. We'll show you the cheapest dual fuel tariff available for your home and how it compares with taking gas and electricity separately, so you can decide what works best.
Pros and cons of dual fuel
Advantages
- Single monthly bill
- One supplier to contact
- Dual fuel discounts
- Simple budgeting
Disadvantages
- Not always absolute cheapest
- Both fuels fixed to same contract
- Exit fees may apply to both
How to keep your dual fuel bills as low as possible
Finding the cheapest dual fuel supplier is only part of the story. Your energy usage also has a massive impact on your final bills. A few quick wins can often trim hundreds of pounds a year from what you pay.
- Use a smart meter — real-time data helps you spot where you're wasting gas or electricity.
- Turn down the thermostat — even a 1°C reduction can cut your heating costs by around 10%.
- Draught-proof and insulate — simple measures like sealing gaps and adding loft insulation reduce heat loss.
- Choose efficient appliances — A-rated fridges, washing machines and boilers use significantly less energy.
- Shift usage off-peak — if you're on a multi-rate tariff, run washing machines, dishwashers and EV charging overnight.
- Submit regular meter readings — avoid estimated bills so you only pay for what you actually use.
Tip: combine tariff and usage savings
Many households save the most when they switch to a cheaper tariff and cut their energy usage by 5–10%.
Review your usage each year, especially before winter, to make sure your dual fuel deal is still competitive and that your Direct Debit is set at the right level.
Cheapest dual fuel energy: frequently asked questions
Will my gas or electricity be cut off when I switch?
No. Your supply will continue as normal throughout the switching process. The only change is who bills you and how much you pay.
How long does it take to switch dual fuel suppliers?
Most switches complete within 5–21 days. Some suppliers offer faster switching, but your new provider will always confirm your go-live date in writing.
Is it cheaper to pay by Direct Debit?
In most cases, yes. Suppliers typically offer a discount for paying by monthly Direct Debit compared with paying on receipt of bill or by prepayment meter.
Do I need a smart meter to get cheap dual fuel deals?
No, but having a smart meter can unlock certain tariffs, especially time-of-use or EV-friendly deals. It also removes the need for manual meter readings.
What happens if my new supplier goes out of business?
Ofgem's Supplier of Last Resort process protects you. Your credit balance is usually transferred to a new supplier and your gas and electricity continue to flow as normal.
Can I get a green dual fuel tariff that is still cheap?
Yes. Many suppliers now offer renewable electricity and carbon-offset gas at prices that are competitive with standard tariffs. Always compare like-for-like using your real usage.
Start your dual fuel comparison today
Spend just a few minutes comparing deals and you could cut your annual gas and electricity bills by hundreds of pounds. There's no obligation to switch and no impact on your credit score.
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