This table compares the eight largest energy suppliers in the UK on a like-for-like basis: a dual-fuel household using Ofgem's Typical Domestic Consumption Values. Standing charges, unit rates, and average monthly costs reflect each provider's standard variable tariff as of July 2026. Customer ratings are aggregated from Trustpilot and Citizens Advice.
Energy Comparison
Cheapest Energy Provider UK 2026: Full Comparison & Expert Guide
Quick Answer
Based on Ofgem's Q3 2026 price cap and current variable tariffs for a medium-usage household (2,900 kWh electricity, 12,000 kWh gas per year), these are the three cheapest energy providers right now. But your actual savings depend on where you live, how much you use, your meter type, and whether you're on a fixed or variable deal. A personalised bill audit will almost always find a better rate than a generic comparison.
Best Value
Octopus Energy
£94/mo
Runner-Up
So Energy
£99/mo
3rd Place
Shell Energy
£103/mo
UK Energy Provider Comparison Table 2026
Based on Ofgem medium usage · July 2026| Provider | Avg Monthly Cost | Standing Charge | Customer Rating | Green Energy | Verdict |
|---|---|---|---|---|---|
|
Octopus Energy Best Value
|
£94 | 53p/day | ★★★★★4.7 | 100% | Best Value |
|
So Energy
|
£99 | 46p/day | ★★★★☆4.4 | 100% | Runner-Up |
|
Shell Energy
|
£103 | 51p/day | ★★★★☆3.8 | 100% | Good Deal |
|
OVO Energy
|
£105 | 48p/day | ★★★★☆4.2 | 100% | Solid |
|
E.ON Next
|
£108 | 54p/day | ★★★★☆4.0 | 50% | Mid-Range |
|
EDF
|
£111 | 52p/day | ★★★★☆3.9 | 58% | Fair |
|
Scottish Power
|
£113 | 55p/day | ★★★☆☆3.5 | 42% | Below Avg |
|
British Gas
|
£117 | 57p/day | ★★★★☆3.6 | 38% | Pricey |
A note on these figures: The monthly costs shown are averages based on Ofgem's Typical Domestic Consumption Values for a medium-usage dual-fuel household. Your actual bill depends on your specific usage, meter type, payment method, and region. Prices reflect standard variable tariffs — fixed deals may be cheaper or more expensive depending on market conditions.
Big Six vs Smaller Providers: Who Actually Saves You Money?
The UK energy market used to be dominated by six suppliers: British Gas, EDF, E.ON, Scottish Power, SSE, and npower. Mergers, acquisitions, and market disruption have reshuffled that landscape. SSE's retail arm merged with OVO in 2020, and npower's customers moved to E.ON. Meanwhile, challengers like Octopus Energy, So Energy, and Shell Energy have carved out significant market share by offering competitive pricing and better digital experiences.
The pattern is consistent: the legacy Big Six suppliers tend to be more expensive than the newer entrants. British Gas, the UK's largest supplier with over 7 million customers, consistently sits at or near the top of price tables. The trade-off is supposed to be superior customer service and brand reliability, but Citizens Advice's quarterly supplier ratings tell a different story — Octopus Energy regularly outperforms British Gas in complaints handling, billing accuracy, and customer satisfaction.
The Big Six (and their successors)
British Gas
The UK's largest and most recognised energy brand. Offers a wide range of services beyond energy — boiler cover, home insurance, electrical work. Their HomeCare bundles can represent decent value if you'd buy those services separately. But on pure energy pricing, they're consistently among the most expensive suppliers. The brand premium is real, and you're paying for it.
- Extensive HomeCare bundles
- Wide engineer network
- Hive smart home products
- Highest average monthly cost
- Standing charges above average
- App can be slow
EDF
As the UK's largest generator of low-carbon electricity (their nuclear fleet produces about 15% of the country's power), EDF has a genuine green story to tell. Their fixed tariffs have historically been competitive, and the "EDF Essentials" plan occasionally undercuts the price cap. Customer service is middling — better than Scottish Power, worse than Octopus.
- Strong fixed-rate deals
- Nuclear-backed low carbon
- EV tariff options
- Variable tariff is mid-range
- Website feels dated
- Wait times can be long
E.ON Next
E.ON rebranded its UK retail operation as E.ON Next after absorbing npower's customer base. They've invested heavily in digital tools and smart home integration. Pricing sits squarely in the middle of the pack — you won't get ripped off, but you're unlikely to get the cheapest deal either. Their "Next Drive" EV tariff is one of the better off-peak charging deals available.
- Decent app and online tools
- Good EV tariff
- Smart meter push
- Mid-range pricing
- Only 50% renewable
- Customer service variable
Scottish Power
Owned by Spanish utility Iberdrola, Scottish Power has committed to 100% wind energy generation. Despite this green commitment, their retail prices remain above average, and customer satisfaction scores are consistently among the lowest in the market. Citizens Advice has ranked them in the bottom third for complaints handling in multiple quarters. One to avoid unless they're offering a particularly strong fixed deal.
- 100% wind generation
- Occasional strong fixed deals
- Poor customer service record
- High standing charges
- Below-average value
The Challengers
Octopus Energy
Octopus has grown from a startup to the UK's second-largest energy supplier in under a decade — and they've done it by consistently being both cheap and good. Their Kraken technology platform (which they licence to other utilities worldwide) lets them keep operational costs low, and those savings get passed to customers. Their Agile tariff gives you half-hourly pricing based on wholesale rates, which rewards flexible usage. Customer service is genuinely excellent: they've topped the Citizens Advice supplier ranking in most quarters since 2020.
- Cheapest standard tariff
- Top-rated customer service
- Innovative smart tariffs
- 100% renewable electricity
- Agile tariff has price spikes
- Some teething issues at scale
OVO Energy
OVO absorbed SSE's retail customers and now sits as the UK's third-largest supplier. Their "Plan Zero" ambition targets net-zero living, and they offer carbon-tracking tools within their app. Pricing is competitive without being the cheapest — they sit firmly in the upper-middle of the pack. Their main differentiator is the OVO Greenlight app feature and Interest on Credit, which pays you interest on money sitting in your account.
- Interest on credit balance
- Good carbon tracking
- Strong app experience
- Not the cheapest
- SSE integration issues lingered
So Energy
So Energy flies under the radar compared to Octopus, but their pricing is consistently among the best in the market. They offer 100% renewable electricity and carbon-offset gas as standard. Their customer base is smaller, which means more personalised service — their Trustpilot rating of 4.4 reflects genuine customer satisfaction rather than just scale. If Octopus is the loudest challenger, So Energy is the quiet one that consistently delivers.
- Second cheapest overall
- Lowest standing charge
- Excellent Trustpilot rating
- Smaller support team
- Fewer tariff options
Shell Energy
Shell acquired First Utility in 2018 and rebranded it as Shell Energy. The oil-giant backing gives them purchasing power that keeps prices competitive, and they offer 100% renewable electricity as standard (though the "green" credentials of an oil company are debatable). Their broadband bundles, powered by a resale agreement, can add extra value. Pricing is good but customer service lags behind Octopus and So Energy.
- Competitive pricing
- Broadband bundles available
- Shell Go+ rewards
- Customer service below average
- Green credentials questioned
Fixed vs Variable Tariffs: Which Saves More in 2026?
Choosing between a fixed and variable tariff is one of the biggest decisions you'll make when switching energy. Neither is universally better — it depends entirely on where you think energy prices are heading and how much certainty you want over your bills.
Fixed-Rate Tariff
- Unit rate and standing charge locked for a set period (typically 12-24 months)
- Your bills still vary with usage — only the rate is fixed
- Protection against price cap increases
- May include exit fees if you leave early
- Often priced slightly above the current price cap
Variable Tariff (SVT)
- Unit rate moves with the market, subject to the Ofgem price cap
- No exit fees — switch any time
- Benefit when prices fall
- Exposed when prices rise
- Most people default to this when a fixed deal ends
Where We Stand in July 2026
The Ofgem price cap for Q3 2026 sits at £1,568 per year for a typical dual-fuel household — a significant drop from the crisis peaks of 2022-23 when it hit £3,280. Wholesale gas and electricity prices have stabilised, though they remain above pre-2021 levels. The question is whether to lock in now or ride the variable rate down further.
Our view: With wholesale prices relatively stable and the price cap forecast to remain in the £1,500-1,650 range for the next two quarters, a competitive fixed deal at or below the current cap rate represents good value. You get certainty without paying a significant premium. But avoid any fixed deal that's more than 5% above the current cap — you're paying too much for peace of mind.
The best approach isn't choosing between fixed and variable — it's reviewing your tariff every time the price cap changes. Most people set up their energy and forget about it for years. A free bill audit every quarter keeps you on the cheapest rate automatically.
If you're on a standard variable tariff and haven't switched in the last 12 months, you're almost certainly paying more than you need to. Even within variable tariffs, different suppliers charge meaningfully different rates — as our comparison table shows, the gap between Octopus Energy and British Gas is £276 per year on the same type of tariff. That's not a rounding error. That's a family holiday.
Why Comparison Sites Don't Show You The Cheapest Rates
If you've ever used Uswitch, Compare the Market, or MoneySupermarket to compare energy deals, you've probably assumed you were seeing the entire market. You weren't. And understanding why is the single most important thing you can learn about saving on energy bills.
The commission model
Price comparison websites are businesses. They make money by earning a commission — typically £30-60 per switch — from the energy provider you switch to. This creates two problems:
- Not all providers list on all comparison sites. Some smaller suppliers choose not to pay commission to every platform, so they simply don't appear. You can search three different comparison sites and see three different "cheapest" results.
- The ranking can be influenced by commission rates. While Ofgem's Confidence Code requires accredited comparison sites to show results by price as the default, the prominence of "sponsored" or "featured" deals can still steer your attention toward higher-commission providers.
Exclusive and wholesale rates
Here's what comparison sites can't show you: exclusive tariffs that are only available through specific channels. Some energy providers offer wholesale or negotiated rates through partnerships, volume buying groups, or specialist consultancies that aren't available on any public comparison site. These rates exist because the provider saves on customer acquisition costs (they don't pay the comparison site commission) and passes some of that saving to you.
This isn't a conspiracy theory. It's basic economics. If a provider pays £50 commission to a comparison site for each new customer, and a different channel delivers customers without that cost, the provider can offer a lower rate through that channel and still make the same margin.
Did you know? Ofgem's Confidence Code only applies to accredited comparison sites. Many energy deals — including some of the cheapest available — are distributed through channels that sit outside this framework entirely. A bill audit consultancy like SaveFirst checks both public and exclusive rates to find your actual cheapest option.
Multi-service bundles fall outside the scope
Comparison sites are structured by product: you search for energy, or you search for broadband, or you search for mobile. They rarely show you the total picture. But some of the best value in the market comes from bundling multiple services together — energy, broadband, mobile, and home phone from a single provider at a combined discount. These bundle deals typically don't appear on any comparison site because they span multiple product categories.
This is the gap that an independent bill audit fills. Instead of searching one product at a time across sites that each show only a portion of the market, an audit looks at your total household spend and finds the combination of providers (or single provider) that minimises the whole thing.
Stop Overpaying. Get Your Free Bill Audit.
We'll check your energy, broadband, mobile, and home phone against every available tariff — including the ones comparison sites don't show. Takes 5 minutes. No obligation. No cost.
How To Actually Get The Cheapest Energy Deal
There are four realistic ways to find the cheapest energy deal in the UK. Each has trade-offs in terms of time, coverage, and the rates you'll actually access.
1. Get a free bill audit from an independent consultancy
A bill audit service like SaveFirst reviews your current bills across all household services — energy, broadband, mobile, and home phone — and compares them against every tariff available, including exclusive wholesale rates that aren't on comparison sites. The process takes about five minutes of your time: you share your current bills (a quick photo on WhatsApp works), and the consultant does the rest.
Why this wins: It's the only method that checks exclusive rates, covers all four bills in one go, and does the legwork for you. There's no cost and no obligation — if they can't save you money, they'll tell you so.
2. Call providers directly and ask for their best rate
Phoning a provider's retention team and asking for their best deal can sometimes unlock tariffs that aren't advertised online. This works particularly well with your current provider, who may offer a "loyalty" rate to keep you rather than lose you to a competitor. The downside? It's time-consuming. You'd need to call each provider individually, compare notes, and you still won't access the wholesale or exclusive rates.
3. Use multiple comparison sites
Because different comparison sites have different provider panels, using two or three gives you broader coverage than using just one. Check Uswitch, Compare the Market, and Energy Helpline for a reasonable spread. But remember: you're still only seeing providers who pay commission to those platforms, and you're still searching one service at a time.
4. Wait for a collective switching scheme
Collective switching (sometimes called "energy auctions") pools thousands of households together to negotiate a bulk rate with a single provider. Ofgem has run trials, and some community groups organise their own. The deals can be good, but the timing is unpredictable and you don't choose the provider. These schemes have also become less common as the market has stabilised.
The bottom line: Method 1 (bill audit) gives you the widest coverage, the least effort, and access to rates the other methods can't reach. If you're serious about finding the absolute cheapest deal, it's the rational starting point — it's free, and you can always use the other methods as well.
But What About Your Other Bills?
Most people searching for the cheapest energy provider are focused on gas and electricity. That makes sense — it's the biggest household bill. But energy is only one of four recurring costs that most UK households pay monthly. When you step back and look at the full picture, the total savings opportunity is significantly larger.
Energy
£276
Broadband
£180
Mobile
£144
Total / Year
£600
Average broadband: The typical UK household pays £35-45 per month for broadband. But equivalent speeds are available from £22-28/month if you switch at contract renewal rather than rolling onto the standard rate. That's £120-200 per year sitting on the table, and most people never claim it because they forget when their contract ends.
Mobile contracts: The same pattern applies. The average UK mobile contract is £28/month, but SIM-only deals with identical data allowances are available from £10-16/month. If your handset is paid off and you're still paying the same monthly amount, you're subsidising a phone you already own.
When you add energy savings (£150-300/year), broadband savings (£120-200/year), and mobile savings (£100-200/year), a typical household could be saving £400-700 per year by switching all three. And that's before considering home phone, which many households still pay £15-20/month for despite barely using it.
This is why a single-service comparison is only part of the answer. The real question isn't "who is the cheapest energy provider?" — it's "what's the cheapest combination of all my household bills?"
The SaveFirst Approach
All 4 Bills. One Conversation. Genuinely Free.
SaveFirst is a UK bill savings consultancy. We don't charge you anything — ever. We audit your energy, broadband, mobile, and home phone bills against every tariff available, including exclusive rates that comparison sites don't list. If we can save you money, we handle the switch. If we can't, we tell you honestly.
- Covers energy, broadband, mobile, and home phone
- Checks exclusive rates not on comparison sites
- Takes 5 minutes — just send us your current bills
- No cost, no obligation, no hard sell
- We handle the switch if you want to proceed
Start on WhatsApp
Average response time: 4 minutes
Frequently Asked Questions
Yes, absolutely. The price difference between the cheapest and most expensive major suppliers is around £276 per year for a medium-usage household. Even if you switched just 12 months ago, rates have changed since then — the Ofgem price cap is reviewed quarterly, and supplier pricing shifts accordingly. If you've been on the same tariff for more than a year, switching is almost certainly worth your time.
The switching process itself is straightforward. Your new supplier handles the transfer, your supply isn't interrupted (the gas and electricity still come through the same pipes and wires), and the whole process typically takes 5-10 working days. There's virtually no downside.
You should review your energy deal every time the Ofgem price cap changes — that's every quarter (January, April, July, and October). You don't necessarily need to switch every time, but checking whether a better deal exists takes five minutes and could save you hundreds.
If you're on a fixed tariff, check when it expires. Most fixed deals roll onto a more expensive standard variable tariff when they end, and the provider isn't required to give you much notice. Set a calendar reminder for 4-6 weeks before your fix ends so you have time to compare alternatives.
Using a bill audit service like SaveFirst means you don't need to remember these dates — we proactively check your rates and let you know when a better deal becomes available.
It depends on the amount. Under Ofgem rules, your current supplier can block a switch if you owe more than £500 (or 28 days' worth of charges, whichever is greater). If your debt is below that threshold, you're free to switch, and your old supplier will send a final bill that you'll need to settle.
If you're in debt above the threshold, contact your supplier to agree a repayment plan. Once the debt drops below the limit, you can switch. It's also worth contacting your new preferred supplier — some will help manage the transfer even with outstanding debt, particularly if you're moving to a cheaper tariff that makes repayment more manageable.
If you're struggling with energy debt, contact Citizens Advice (0808 223 1133) or the Energy Ombudsman for free support. There are grants and hardship funds available that many people don't know about.
No. Your new supplier handles the entire transfer process, including notifying your old provider. You don't need to phone anyone, write any letters, or cancel your existing contract (unless you're on a fixed deal with exit fees, in which case you should check those fees before committing).
The only thing you might want to do is take a meter reading on the day of the switch. This ensures your final bill from the old supplier and your first bill from the new one are based on actual usage rather than estimates. If you have a smart meter, this happens automatically.