Type “business electricity suppliers” into Google and you get a wall of logos, star ratings, and quote forms, most of them not built with your specific business in mind. British Gas, Octopus, E.ON Next, EDF, ScottishPower - they are all renowned names, and every one of them will happily give you a price. The hard part is working out which one actually fits your business.

This article lines up the top 5 business electricity suppliers properly: who they are, what they tend to charge as far as any business supplier can be pinned down on price, what their contracts involve, and where each one genuinely shines. We will also walk through a real, dated example of quotes for identical usage, then finish with practical tips for narrowing the list to the supplier that suits your business rather than just the biggest name on the page.

How We Compared These Business Electricity Suppliers

We looked at five things: how pricing tends to position against the wider market, the contract types on offer, green energy credentials, customer service reputation on published review platforms, and the type of business each supplier suits best. Business electricity is not sold from a fixed public rate card the way domestic tariffs are, so every pricing figure here reflects typical, published or aggregated data checked against multiple sources in August 2026, not a single confirmed rate. Treat it as a starting point rather than a substitute for a live quote against your own meter.

Top 5 Business Electricity Suppliers at a Glance

Before the details, here is how the five compare side by side.

These are general positions rather than fixed rules. Every supplier here will quote almost any eligible business, and the best fit still depends on your usage, location and priorities.

The 5 Business Electricity Suppliers Compared in Detail

Here is what actually sits behind each name.

1. British Gas Business

British Gas Business is part of British Gas, owned by Centrica plc, a FTSE 100 energy group and one of the longest-established names in UK energy. Its scale means dedicated account management for larger and multi-site businesses, alongside an engineer network few rivals can match.

Contracts run from one to three years, extending to four years through British Gas Lite for smaller, budget-focused accounts. Electricity comes with zero-carbon generation as standard, backed by a fuel mix of roughly 72 percent renewables and 28 percent nuclear, with paid upgrades available to a fully renewable tariff.

Worth Checking: British Gas publishes maximum microbusiness rates rather than a single headline price, and those ceiling figures, up to roughly 38p per kWh, sit well above what most businesses actually pay once negotiated. Best for multi-site operations and businesses that value an established brand with wide-reaching support.

2. Octopus Energy for Business

Octopus Energy for Business is the commercial arm of Octopus Energy, which launched its dedicated business division in 2018 and now supplies more UK electricity customers than any other provider. It runs on Octopus’s own Kraken technology platform, which powers live usage data, smart tariffs and a widely praised app.

Fixed contracts run for 12, 24 or 36 months, and its Agile Business tariff tracks wholesale prices in 30-minute blocks for businesses that can shift usage away from peak hours. Renewable electricity is standard, and businesses with solar panels can access flat-rate or dynamic export tariffs for power sold back to the grid. Customer satisfaction consistently ranks among the strongest of any major UK supplier.

Worth Checking: Octopus asks new business customers for an advance payment, usually around three months of estimated costs, refunded in full at the end of the contract. Best for small and medium businesses chasing a sharp rate, plus anyone running an EV fleet or solar generation.

3. E.ON Next Business

E.ON Next is the UK retail arm of E.ON, one of Europe’s largest energy groups. Its business operation was rebuilt on Octopus’s Kraken platform in 2023 after E.ON absorbed npower’s customer base, and that switch brought a noticeably smoother digital experience.

Fixed contracts typically run 12 to 36 months, with REGO-certified renewable electricity available and a dedicated EV tariff called Next Drive. Larger sites using over 100,000 kWh a year get access to a named account manager, while smaller businesses are generally handled through the same digital portal as domestic customers.

Worth Checking: Its business portal is less specialised than some dedicated commercial platforms, so multi-site businesses with complex needs may want to ask about account management upfront. Best for SMEs wanting REGO-backed green electricity with a genuinely improved digital experience.

4. EDF Business

EDF is the UK arm of Électricité de France, and unlike most rivals, it generates a significant share of the electricity it sells, largely from nuclear power stations including Heysham and Hartlepool. That generation mix means standard EDF business electricity already qualifies as zero-carbon, without paying extra for a green tariff.

Fixed contracts typically run one to three years, and larger businesses reporting under frameworks like RE100 can access 24-hour carbon-free contracts matched to nuclear and renewable generation on a half-hourly basis. Customer reviews are generally positive, though, as with any supplier serving millions of accounts, experience varies with account complexity.

Worth Checking: EDF’s fixed contracts typically lock in the energy element only, with network and policy costs reviewed separately, so read the small print on what is genuinely fixed. Best for businesses wanting zero-carbon electricity as standard and larger organisations with formal sustainability reporting.

5. ScottishPower Business

ScottishPower, part of the Spanish Iberdrola Group, has supplied UK businesses since 1990 from its Glasgow headquarters. It stepped back from large industrial and commercial accounts in 2022, so it now focuses squarely on small and medium-sized businesses.

Its electricity is backed by 100 percent renewable generation from its own UK wind farms, sold under its Renewable For Business tariff, and it picked up a UK Green Business Award in 2025 for a customer-facing sustainability campaign. Fixed contracts run for one, two or three years, though the non-energy portion of the price is reviewed quarterly rather than fully locked for the term.

Worth Checking: Because ScottishPower no longer serves the largest industrial users, very high-usage businesses may find a better fit elsewhere. Best for small and medium businesses wanting genuinely renewable electricity from a supplier that owns its own generation.

Indicative SME fixed-rate ranges, 2026. Ranges overlap deliberately: none of these suppliers is a fixed cheapest or most expensive option.

A Real Example: What These Suppliers Can Cost for the Same Business

Numbers help more than description, so here is a genuine, dated snapshot rather than an invented one. On 11 August 2026, SwitchUrEnergy’s live comparison tool returned the following indicative annual costs for a representative small business using 10,000 kWh of electricity a year (7,000 kWh day, 3,000 kWh night), excluding VAT.

Source: SwitchUrEnergy live comparison tool, 10,000 kWh annual profile, 11 August 2026. Excludes VAT.

That is a gap of roughly £388 a year between the lowest and highest quote for identical usage, simply from comparing rather than accepting the first offer. Figures like these shift regularly as wholesale prices and supplier margins move, so treat this as proof that comparing genuinely pays off, not as a locked-in price list.

Business Electricity Rates in 2026: What Actually Drives the Difference

Business electricity is not covered by the Ofgem price cap that limits household bills, so no supplier publishes a single going rate. What you get quoted comes down to five things: how much electricity you use, your postcode and local network charges, whether you are on a standard or half-hourly meter, how long a contract you are willing to sign, and your business’s credit profile.

Across the market in 2026, small businesses on fixed contracts are typically paying somewhere between 22p and 30p per kWh, with the sharpest deals nearer 18p to 22p. Fall onto a deemed or out-of-contract rate, and that figure can climb past 32p, sometimes touching 40p or more. That is precisely why the “best” business electricity supplier is not a fixed answer. It is whichever of these five, or any other trusted UK energy services provider, gives your specific business the sharpest number once your usage and location are factored in.

Actionable Tips for Choosing Between Business Electricity Suppliers

A few habits make a genuine difference to which supplier actually ends up cheapest for you.

1. Compare more than two names. Rates for identical usage can differ by 30 percent or more, so checking just British Gas and Octopus still misses a chunk of the market.

2. Match the contract to your usage pattern. A predictable, always-on load suits a straightforward fixed deal, while businesses that can shift usage away from peak hours may benefit from a dynamic tariff such as Octopus Agile Business.

3. Check what “green” actually means. Zero-carbon and REGO-certified renewable are not identical claims, so ask what sits behind a supplier’s green tariff if sustainability matters to your clients.

4. Read the exit terms before you sign. Exit fees, notice periods and what happens to the non-energy portion of your price all vary between business electricity suppliers.

5. Ask about advance payments. Some business electricity suppliers, including Octopus, ask new business customers for an upfront payment, which affects your short-term cash flow even though it is refunded later.

6. Time your comparison properly. Start three to six months before your current contract ends, so you are never forced onto an expensive deemed rate.

7. Use a whole-of-market comparison. A broker such as SwitchUrEnergy can put live quotes from British Gas, Octopus, E.ON Next, EDF, ScottishPower and other UK energy services side by side in minutes, at no cost.

Frequently Asked Questions

Which is the cheapest business electricity supplier?

There is no fixed answer, because none of the major business electricity suppliers publish a single public rate. Octopus and E.ON Next often price competitively for smaller usage bands, while British Gas and EDF can be sharper for larger, multi-site or half-hourly accounts. Comparing live quotes against your own meter is the only reliable way to know.

Is Octopus electricity cheaper than British Gas for business electricity?

It depends on your usage. Octopus electricity rates tend to be more competitive for small and medium businesses, while British Gas can be stronger for larger or multi-site accounts. The gap is rarely large enough to assume either one without comparing.

Do these suppliers offer green business electricity?

Yes. All five supply zero-carbon or renewable electricity as standard on their core business tariffs, though the certification behind that claim varies, so ask specifically about REGO backing or supplier-owned generation if it matters for your reporting.

How long does it take to switch business electricity suppliers?

Once your notice period has been served, switching typically completes within a few working days for microbusinesses and a few weeks for larger or more complex accounts. Your electricity supply is never interrupted during the process.

What happens if I do not choose a new contract in time?

You will usually move onto a deemed or out-of-contract rate, which can run 30 percent or more above a negotiated deal. Ofgem caps how long a rollover contract can run for microbusinesses, but it is still an expensive default to sit on.

Can I compare all five of these suppliers in one place?

Yes. A whole-of-market comparison service checks live quotes from multiple UK energy services, including the business electricity suppliers covered here, against your actual usage and postcode, rather than you contacting each one individually.

Final Words

None of these five business electricity suppliers is universally cheapest, and any guide claiming otherwise is oversimplifying a market that genuinely depends on your postcode, usage and contract length. What they do offer is five credible, well-established starting points: British Gas for scale, Octopus for sharp rates and a strong app, E.ON Next for a smoother digital experience, EDF for nuclear-backed zero-carbon supply, and ScottishPower for renewable electricity from its own UK wind farms.

The genuinely useful next step is not picking a favourite from this list; it is comparing live quotes from several of them against your real meter. That takes minutes, costs nothing, and is usually where the actual savings show up. Pull together your last bill, check your usage, and get a free business electricity quote from SwitchUrEnergy to see how these business electricity suppliers, and others, price up for your business specifically.