Business electricity rates UK 2026: what SMEs actually pay per kWh

The headline "from 18p per kWh" rate splashed across broker landing pages in May 2026 does not exist for most small businesses signing a new fixed contract this quarter. It exists for a sliver of large half-hourly consumers on bespoke wholesale-tracked deals, and it disappears the moment the non-commodity stack and a broker uplift are added. The figure that actually arrives on a microbusiness bill is closer to 28-32p per kWh, and the gap is not a mystery: it is six named levies, one regional charge, and one commission, all stacked on top of the wholesale block.

Last reviewed: May 2026

What a UK business actually pays per kWh in May 2026

A microbusiness signing a new 24-month fixed electricity contract in the second quarter of 2026 is, in most cases, looking at a unit rate between 27p and 32p per kWh, with a standing charge somewhere between 55p and 90p per day. A small business with annual consumption between 25,000 kWh and 100,000 kWh tends to land in a 24-29p per kWh band on a comparable fixed product, because suppliers price the larger volume against a slightly tighter wholesale spread and the standing charge spreads across more units.

Medium-sized non-half-hourly users (typically 100,000 kWh to about 250,000 kWh annual) sit in a 22-27p per kWh range on new fixed deals signed this spring. Half-hourly metered sites (HH, mandatory above 100 kW maximum demand) move into bespoke pricing where the unit rate is split into separate day, night, weekend and capacity components, and the published p/kWh comparisons stop being meaningful.

None of those numbers are a price cap.

The non-domestic market has no Ofgem default tariff cap in the way the domestic market does.

The numbers come from cross-referencing Ofgem's non-domestic price data feed, the gov.uk Quarterly Energy Prices statistical release, and supplier-published business tariff pages that publish rates rather than route every quote through a salesperson. Ofgem's Q1 2026 non-domestic market data portal release indicates microbusiness fixed-price electricity deals averaged in the high-20s p/kWh in March 2026, which lines up with what supplier-direct quotes are returning in May. The DESNZ Quarterly Energy Prices statistical release for the same quarter shows the small non-domestic consumer band tracking close to that figure, with regional variation. The published series gives a usable benchmark for a microbusiness procurement exercise. It does not, on its own, tell a specific business what its specific quote should look like, because individual quotes depend on credit profile, contract length, payment terms, and the supplier's hedge position on the day. The benchmark is a sanity check, not a target. A quote materially above the benchmark deserves explanation; a quote materially below it deserves scrutiny too, because the cheapest headline often hides the largest commission uplift.

The non-commodity stack: where 8-11p per kWh disappears

The wholesale electricity price is only one input. The rest of the unit rate is a stack of network, policy, and tax charges, each of which has its own acronym, its own regulator, and its own annual reset. In practice, the wholesale block in May 2026 sits roughly in the 12-15p per kWh range for a forward 12-month fixed shape, depending on when the supplier locked in the hedge. The unit rate then adds the following:

• TNUoS (Transmission Network Use of System): charged by National Grid ESO for use of the high-voltage network. For non-half-hourly customers it is typically embedded in the unit rate; for HH customers it is often passed through as a separate line.
• DUoS (Distribution Use of System): charged by the regional Distribution Network Operator (UK Power Networks, Northern Powergrid, Electricity North West, SP Energy Networks, SSEN, National Grid Electricity Distribution, etc.). DUoS varies by DNO region and by time of day for HH sites.
• BSUoS (Balancing Services Use of System): the cost of National Grid ESO balancing the system second-to-second. Since the April 2023 reform, BSUoS is recovered from suppliers via a fixed daily charge.
• RO (Renewables Obligation): the legacy support mechanism for accredited renewable generators. Suppliers must present ROCs or pay into the buy-out fund.
• CfD (Contracts for Difference): the current support mechanism, recovered through the supplier obligation. The Low Carbon Contracts Company publishes the quarterly levy rate.
• FiT (Feed-in Tariff): the closed-to-new-entrants small-scale generation support scheme, still being recovered from suppliers through 2032.
• CCL (Climate Change Levy): a tax on business energy. The main rate for electricity from 1 April 2026 is published on the HMRC environmental taxes pages.

Add those together with the supplier's own operating cost and margin and the difference between the wholesale block and the customer-facing unit rate is usually 8-11p per kWh for non-half-hourly business contracts.

The catch is that the relative weight of each component shifts every year; a fixed contract priced in late 2025 used a different non-commodity assumption to one priced in May 2026.

Regional standing charges: the DNO postcode lottery

Standing charges look like a small line.

Across a 365-day year on a business meter they are not. A 90p per day standing charge is 328.50 pounds before a single kWh is consumed.

The headline reason standing charges vary is the regional Distribution Network Operator. The 14 GB DNO regions have different network maintenance costs, different rural-to-urban customer mixes, and different historical asset bases. London (LPN, served by UK Power Networks) and the South East (SPN, also UKPN) tend to sit at the lower end of business standing charges because the customer base is dense and the network is short. North Scotland (served by SSEN) tends to sit at the upper end because the network spans a much larger geographic area per customer.

The bands above reflect the spread observed across supplier-direct quote requests in early May 2026 for a microbusiness profile of around 12,000 kWh per year, single-rate non-half-hourly meter. A bakery in Inverness (Northern Scotland DNO) signing a new contract this month is paying close to the upper end of the table on standing charge alone; the same bakery moved to a Croydon address would shed somewhere between 18p and 35p per day before the unit rate is even quoted.

Here is where it breaks for comparison sites. The headline p/kWh figure on most quote tools assumes a generic standing charge, then re-quotes a region-specific number once the postcode is entered. The unit rate often moves too, because some suppliers adjust both lines together. Anyone benchmarking off the first quote is benchmarking off a placeholder.

Microbusiness vs small vs medium: the volume cliff

Ofgem defines a microbusiness, for energy supply purposes, as a business with fewer than 10 employees and annual turnover under 2 million euros, or that uses no more than 100,000 kWh of electricity or 293,000 kWh of gas per year. The microbusiness definition is the gate to specific Ofgem protections: a 12-month maximum contract length restriction was removed in 2023, but rules on contract renewal, written termination notice, and TPI commission disclosure (under the 2024-2026 reforms) still apply.

A small business sitting just over the microbusiness threshold (say 110,000 kWh annual electricity) loses access to certain microbusiness-specific Ofgem protections, but tends to gain access to supplier sales desks that will negotiate. The published rate on a supplier microbusiness portal and the bespoke desk quote for a 200,000 kWh user can be 3-5p per kWh apart on the unit rate alone, even with no broker involved.

Medium-sized non-HH users (think a 40-room hotel, a busy restaurant, a small manufacturer) often sit in an awkward middle. Too small to attract the cheapest bespoke desk pricing, too large to qualify for the cleanest microbusiness portal rate. In practice the medium-sized SME is the band that ends up paying the highest blended rate per kWh when the broker uplift is factored in, because brokers know the desk attention is harder to get and price accordingly.

Why "lowest rate" adverts mislead

A broker advert quoting "business electricity from 18p per kWh" in May 2026 is almost always doing one of three things. It is quoting a wholesale-only figure with no non-commodity stack added. It is quoting a half-hourly large-user night rate as if it were the full unit rate. Or it is quoting an introductory teaser that resets after the first three months.

None of those three is illegal. All three are misleading by omission.

Ofgem's non-domestic market review concluded in 2024 with new rules on TPI (third-party intermediary) commission disclosure, and the rule changes published on the Ofgem non-domestic TPI review pages set out the disclosure requirements brokers must meet from December 2024 onwards. The catch is that enforcement of the disclosure rule still relies on the customer asking for the broker's commission to be itemised; if no one asks, the commission stays uplifted into the unit rate and the customer never sees it as a separate line on the quote.

A microbusiness in Bristol that signed a 36-month broker-arranged fixed contract in March 2024 at 41p per kWh was almost certainly paying 2-4p per kWh of broker commission embedded in that unit rate. Across 12,000 kWh per year for three years, that is roughly 720 to 1,440 pounds going to the broker through the unit rate. The supplier did not pay it. The customer paid it through their bill, every month, for 36 months.

What to compare when comparing

The honest comparison is not "which supplier has the lowest p/kWh". It is "which supplier has the lowest annual total once the unit rate, the regional standing charge, the CCL, and the contract length are normalised". For a microbusiness, the working method is to take the annual kWh, multiply by the offered unit rate, add 365 multiplied by the daily standing charge, add 0.00847 pounds per kWh CCL (the published electricity main rate from 1 April 2026), then apply VAT at the appropriate rate.

VAT is the trap. Most small businesses pay 20% VAT on energy. A subset qualify for the reduced 5% rate where the use is "domestic or charitable non-business" or where consumption is below the de minimis threshold (1,000 kWh per month for electricity). HMRC's Notice 701/19 sets out the qualifying criteria.

The 15% VAT difference is often larger than the difference between the cheapest and the most expensive supplier on a fair comparison. A cafe drawing 11,500 kWh per year and qualifying for de minimis 5% VAT on every month it falls below 1,000 kWh saves more on VAT alone than any unit rate negotiation tends to achieve.

Frequently asked questions

What is the average business electricity unit rate in the UK right now?

Across UK microbusiness and small business fixed contracts signed in May 2026, unit rates typically fall between 24p and 32p per kWh, with the exact figure driven by annual consumption, DNO region, contract length, and credit profile. Ofgem's non-domestic market data portal carries the published quarterly series.

Are business electricity rates capped by Ofgem?

No. The Ofgem default tariff cap applies to domestic standard variable tariffs only. The non-domestic market has no equivalent cap, although Ofgem's microbusiness rules set out contract and renewal protections for the smallest non-domestic customers.

Why is the standing charge so much higher than on a household bill?

Business meters often have higher network capacity, different settlement classes, and a regional DNO charge structure that recovers more fixed network cost per non-domestic customer than per domestic customer. A microbusiness in the Northern Scotland DNO region pays a different standing charge to one in London for the same kWh draw.

What is the Climate Change Levy and who pays it?

The Climate Change Levy is a tax on energy used by non-domestic customers in the UK, administered by HMRC. The main rate for electricity from 1 April 2026 is published on the gov.uk environmental taxes pages. Customers in qualifying Climate Change Agreement sectors can claim a reduced rate.

How often do business electricity unit rates change?

A fixed business contract locks the unit rate for the term, usually 12, 24, or 36 months. Variable, deemed, and out-of-contract rates can change with as little as the contractual notice period, which for deemed contracts is typically very short.

Are half-hourly business rates lower than non-half-hourly rates?

The headline unit rate on a half-hourly contract is often lower per kWh than a non-half-hourly equivalent, but HH bills add separately itemised capacity, reactive power, and TNUoS charges that do not appear on non-HH bills. Comparing the two by unit rate alone is misleading.

Sources

• Ofgem - Energy data portal, Q1 2026 non-domestic market data release
• DESNZ - Quarterly Energy Prices statistical release, May 2026
• Ofgem - Non-domestic market review, TPI rule changes (December 2024 implementation)
• HMRC - Climate Change Levy main rates from 1 April 2026
• Ofgem - Energy advice for businesses, microbusiness definition
• HMRC - VAT Notice 701/19, fuel and power, de minimis threshold