Finding the right gas and electricity supplier in 2025 can feel overwhelming with rising energy costs and shifting tariffs. This guide breaks down the UK’s most affordable and reliable providers based on recent data and customer feedback.
Whether you’re looking to cut bills, switch to greener energy, or get better service, we’ve analysed the top 13 suppliers to help you make a smart, informed choice for your household energy needs.
How Can You Identify the Cheapest Gas and Electricity Supplier in the UK?
Choosing the right energy provider goes beyond simply looking for the lowest rates. The cheapest gas and electric supplier is one that offers a balance of affordability, reliability, and customer service.
With energy costs fluctuating due to global demand, regulation, and infrastructure costs, a good deal now may not be the best long term. That’s why comparing both tariff pricing and company practices is essential.
Key considerations include:
- Tariff type: Fixed vs variable
- Billing accuracy and transparency
- Customer service responsiveness
- Support for vulnerable customers
- Standing charges that can inflate bills
Reviewing all of these factors helps determine who offers true value, not just low prices.
Why Do Gas and Electricity Prices Vary Between Suppliers?
Gas and electricity prices in the UK vary due to a complex mix of international and domestic pressures. In 2025, several factors continue to influence what households pay. Global wholesale energy prices fluctuate due to geopolitical tensions, fuel supply issues, and seasonal demand changes.
Suppliers investing in green energy projects often face higher operating costs, which may be reflected in their tariffs. Similarly, government regulations require providers to meet certain obligations, like smart meter rollout targets, which can influence pricing.
Operational efficiency also plays a big role. Companies with lean, tech-driven operations are better positioned to pass savings onto customers.
Meanwhile, daily standing charges can inflate bills, especially when usage is low. While OFGEM’s price cap protects against excessively high rates, it doesn’t ensure the best deal across the board, which is why comparisons remain vital.
Is It Still Worth Switching Energy Suppliers in 2025?
Yes, switching energy suppliers is still a worthwhile move in 2025. Although the number of active providers has reduced in recent years, there is still meaningful variation in pricing, service quality, and tariff options.
Many customers remain on standard variable tariffs after their fixed-term contracts expire, often paying far more than necessary without realising it.
Switching today is more consumer-friendly than ever. Most switches are completed within five working days, with no disruption to supply.
Protections are in place to safeguard your credit balance in the event of supplier failure, and some companies even offer bonuses for switching.
With simple online comparison tools, households, especially those on dual-fuel tariffs, can identify better value quickly and easily.
What Are the Common Pitfalls When Selecting a Low-Cost Energy Provider?
Going for the lowest quote without due diligence can backfire. Here are key risks to watch for:
- High standing charges that make bills expensive for low users
- Poor digital services, making account management harder
- Infrequent or inaccurate billing, leading to surprise debt
- Difficult complaint resolution
- Lack of help during emergencies or outages
A cheaper tariff isn’t always a better experience. It’s crucial to look at real customer feedback and independent assessments when comparing options.
Top 13 Cheapest Gas and Electric Supplier
1. Octopus Energy
Octopus Energy has continued its dominance in the UK energy sector thanks to transparent pricing, innovative digital tools, and customer-focused policies.
It combines affordability with a strong commitment to renewable energy, offering 100% green electricity as standard. Their tech-driven systems make managing usage easy, while their flexible tariffs provide options for both fixed and variable rates.
Octopus is known for pioneering agile tariffs that track wholesale prices daily, offering significant savings for engaged users.
Key Features: Fully digital account management, green electricity, no exit fees on most plans
Pricing: Approx. £1,340/year for dual fuel, variable rates apply based on usage
Specs: Dual fuel, renewable electricity, app-based control, flexible contracts
Testing Insights: Scored highest in customer satisfaction and responsiveness in 2024 assessments
Best For: Tech-savvy households who want flexibility and green credentials at a good price
2. Utility Warehouse
Utility Warehouse offers more than just energy, it’s a bundled service provider combining broadband, mobile, and insurance options to create a cost-saving package for households.
Their energy deals are often cheapest when bundled, making them ideal for users seeking simplicity across all utilities. While not the greenest supplier, the focus is on long-term affordability and loyalty rewards.
Key Features: Multi-service bundling, single billing for all household utilities
Pricing: Starting at £1,320/year for dual fuel with bundled plans
Specs: Fixed 12-month contracts, dual fuel, standard and smart meter support
Testing Insights: High scores in contact availability, complaint resolution, and bundled value
Best For: Families or multi-utility users wanting one provider for everything
3. Utilita
Utilita has carved a niche in the prepayment sector, making energy more manageable for users who prefer pay-as-you-go options.
Their mobile app allows for top-ups, usage tracking, and alerts, all useful features for budgeting-conscious households. It’s particularly appealing for students, renters, or anyone needing tighter control over energy expenses.
Key Features: Smart prepayment meters, app-based top-ups, usage alerts
Pricing: Around £1,410/year for average PAYG dual fuel use
Specs: Prepayment model, electricity and gas, mobile-first management
Testing Insights: Strong ratings in affordability and supporting vulnerable customers
Best For: Households needing prepayment control and mobile access
4. 100Green
100Green is the UK’s only provider offering 100% renewable electricity and gas, making it a clear choice for eco-conscious customers.
Though slightly more expensive than some competitors, it offsets carbon through verified projects and invests in sustainable energy sources.
Its plans are straightforward, and customer satisfaction tends to be high among those prioritising the environment.
Key Features: Carbon-neutral energy, no fossil fuels, ethical sourcing
Pricing: Approx. £1,470/year for typical dual fuel customers
Specs: Green electricity and biomethane gas, fixed contracts available
Testing Insights: Rated highly for ethics and clarity, with consistent performance
Best For: Users who want fully green energy without the complexity
5. E (Energy)
E is a smaller provider focused on affordability and simplicity. It keeps overheads low by offering straightforward tariffs and a direct customer service model.
While it doesn’t have the digital flash of larger firms, E provides consistently accurate billing and quick problem resolution, making it a dependable low-cost option for households on tight budgets.
Key Features: Fixed-rate pricing, basic account access, low standing charges
Pricing: Starting from £1,310/year depending on region
Specs: Dual fuel, simple fixed tariffs, telephone-based support
Testing Insights: Performed strongly in billing accuracy and smart meter installations
Best For: Budget-conscious households seeking reliability over features
6. Co-op Energy
Backed by the Midcounties Co-operative and supplied by Octopus, Co-op Energy adds an ethical touch to mainstream energy supply.
While tariffs are competitive, the real value lies in its commitment to community initiatives and renewable electricity.
It appeals to those who want their energy money to support wider social goals without paying a premium.
Key Features: Community support, green energy, ethical business model
Pricing: Estimated at £1,380/year for average dual fuel user
Specs: Renewable electricity, flexible plans, same platform as Octopus
Testing Insights: Strong average performance across service and support categories
Best For: Values-driven consumers looking to support cooperative ethics
7. Outfox the Market
Outfox the Market is a low-cost challenger brand offering aggressive pricing and minimal frills. It operates digitally, which helps keep costs down, and is known for its competitive unit rates.
However, it may not suit those needing frequent customer support, as contact options are limited to online channels.
Key Features: Market-beating rates, online-only account handling
Pricing: Around £1,290/year, among the lowest in the UK
Specs: Dual fuel, variable tariffs, email and web chat support only
Testing Insights: Performs well on pricing and switching speed; moderate on support
Best For: Users focused purely on cost and comfortable with digital-only service
8. Ecotricity
Ecotricity stands out for investing customer funds into building green infrastructure in the UK. While pricing is above average, its impact-driven business model and transparent sourcing make it an ideal supplier for those wanting to directly fund the transition to clean energy. It’s also one of the few companies offering vegan-certified electricity.
Key Features: Infrastructure investment, vegan-certified energy, UK-made green power
Pricing: Estimated at £1,480/year
Specs: Renewable gas and electricity, monthly rolling and fixed contracts
Testing Insights: Scored highest in environmental policy and customer mission alignment
Best For: Ethical users wanting to drive change through their energy provider
9. Sainsbury’s Energy
Combining loyalty points with practical tariffs, Sainsbury’s Energy is designed for convenience and moderate savings.
Backed by British Gas, it uses existing infrastructure while offering extra value to Sainsbury’s customers.
Its straightforward plans appeal to households that shop regularly with the supermarket and want energy rewards.
Key Features: Nectar point rewards, British Gas infrastructure
Pricing: From £1,360/year with loyalty incentives
Specs: Dual fuel, fixed contracts, online and phone support
Testing Insights: Rated well for payment clarity and statement accuracy
Best For: Shoppers who want to integrate household savings with loyalty points
10. EDF Energy
EDF brings international expertise and a robust UK infrastructure. It provides a broad selection of tariffs, including electric vehicle (EV) packages and smart meter incentives.
While pricing is average, customers benefit from a well-established supplier with comprehensive digital services and regular fixed-rate offers.
Key Features: Wide range of tariffs, EV-compatible plans, smart meter savings
Pricing: Roughly £1,395/year depending on location
Specs: Dual fuel, fixed and flexible tariffs, app support
Testing Insights: Solid performance in bill accuracy and complaint resolution
Best For: Customers who want stability from a large, reliable brand
11. E.ON Next
E.ON Next offers a tech-forward experience tailored to modern households. It’s part of the traditional E.ON group but focused on cleaner, smarter energy solutions.
Its sleek account management tools and smart meter discounts make it attractive to digital users, though customer support is primarily online-based.
Key Features: Paperless billing, smart energy tracking, green options
Pricing: Starting at £1,370/year
Specs: Dual fuel, app-based control, flexible tariffs
Testing Insights: Mixed results—praised for tech tools, lower for contact support
Best For: Younger users or digital-first households looking for sleek UX
12. So Energy
So Energy offers a compelling blend of competitive prices and environmental responsibility. Customers can even vote on where their renewable energy is sourced.
The brand has grown steadily due to its transparent tariffs and straightforward customer support. While not the cheapest, its balance of value and purpose appeals to many.
Key Features: Customer energy source choice, transparent pricing
Pricing: Around £1,350/year for fixed dual fuel
Specs: Renewable electricity, fixed-term tariffs, multi-channel support
Testing Insights: Steady average performance; excels in green offering transparency
Best For: Users wanting a simple green energy solution at reasonable rates
13. British Gas
British Gas remains the UK’s most well-known supplier, with long-standing infrastructure and nationwide reach.
While it’s not the cheapest, it offers added-value services like boiler cover and energy-saving consultations. Its legacy systems are solid, but some customers report inconsistent service levels.
Key Features: Extensive coverage, boiler and heating add-ons, fixed and variable tariffs
Pricing: Approx. £1,430/year, excluding bundled services
Specs: Dual fuel, smart meter compatible, phone and app support
Testing Insights: Mixed feedback, solid technical operations, lower on customer experience
Best For: Users prioritising familiarity and extra home service options
Top 13 Cheapest Gas and Electric Suppliers Comparison (2025)
| Supplier | Approx. Cost (Dual Fuel/year) | Contract Type | Fuel Type | Best For |
|---|---|---|---|---|
| Octopus Energy | £1,340 | Fixed & Variable | Renewable Electricity + Gas | Tech-savvy users wanting green energy |
| Utility Warehouse | £1,320 (with bundles) | Fixed (12-month) | Standard Dual Fuel | Bundled utility and broadband customers |
| Utilita | £1,410 | Prepayment | Standard Dual Fuel | Prepay households needing app-based control |
| 100Green | £1,470 | Fixed | 100% Renewable | Eco-focused users wanting carbon-neutral gas |
| E (Energy) | £1,310 | Fixed | Standard Dual Fuel | Budget users preferring simplicity |
| Co-op Energy | £1,380 | Fixed & Flexible | Renewable Electricity | Ethical consumers supporting cooperatives |
| Outfox the Market | £1,290 | Variable | Standard Dual Fuel | Cost-conscious digital-first users |
| Ecotricity | £1,480 | Monthly & Fixed | Green Electricity + Gas | Ethical investment in renewables |
| Sainsbury’s Energy | £1,360 | Fixed | Standard Dual Fuel | Supermarket shoppers earning rewards |
| EDF Energy | £1,395 | Fixed & Variable | Standard Dual Fuel | Households preferring big-name providers |
| E.ON Next | £1,370 | Variable & Fixed | Standard + Green Options | Users seeking digital-first service |
| So Energy | £1,350 | Fixed | Renewable Electricity | Green-minded customers wanting fixed rates |
| British Gas | £1,430 | Fixed & Bundled | Standard Dual Fuel | Traditional users needing service add-ons |
Conclusion
In 2025, the energy market offers more variety than ever, balancing affordability, sustainability, and service quality.
Whether you’re after the lowest price or ethical sourcing, there’s a supplier tailored to your needs.
Regularly reviewing your usage and switching when necessary is still the smartest way to ensure you’re never overpaying for your gas and electricity.
FAQs
What is the average UK household energy cost in 2025?
The average annual cost for dual fuel is around £1,400, depending on region and usage.
Can renters switch energy suppliers?
Yes, if you pay the bill directly, you’re legally allowed to switch providers.
Are smart meters required for switching?
No, but having a smart meter can offer more accurate billing and enable time-based tariffs.
What is a standing charge?
It’s a daily fixed fee added to your energy bill regardless of usage, varying by supplier.
Is 100% renewable electricity more expensive?
Not necessarily, many green suppliers now offer prices similar to standard tariffs.
How quickly can I switch energy suppliers?
Most switches take 5 working days with no interruption to your service.
Are bundled utility packages worth it?
They can offer savings, especially if you need broadband or mobile services too.
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