Business Electricity Comparison UK: Rates, Contracts and How to Switch

Comparing business electricity in the UK differs from comparing domestic energy. There is no price cap, no universal comparison tool that covers all suppliers, and prices vary significantly by consumption volume, meter type, contract length and region. This guide covers how the market works, what drives price differences between businesses, and how to approach the comparison and switching process.

How is business electricity priced in the UK?

Business electricity pricing in the UK is a commercial market. Unlike domestic consumers protected by the Ofgem default tariff cap, businesses must negotiate their supply contract directly with a supplier or through a broker. There is no regulatory floor or ceiling on business unit rates, though Ofgem does require suppliers to offer reasonable deemed contract rates to businesses without a formal supply agreement.

The DESNZ publishes quarterly data on non-domestic electricity prices through its Quarterly Energy Prices series and the associated Table E4.1 (electricity prices by consumption band). Manufacturing sector users paid an average of 16.8 pence per kWh in Q4 2025, a decrease of 7.9% compared to Q4 2024, per the DESNZ Quarterly Energy Prices release of March 2026. Smaller businesses on retail contracts pay materially higher rates than this industrial average.

How electricity unit rates vary by business size

The single most significant driver of unit rate variation across UK businesses is consumption volume. Higher-consuming businesses negotiate lower unit rates because they represent more valuable contracts for suppliers, are more likely to be half-hourly metered, and carry lower administrative cost per kWh supplied. Ofgem's State of the Energy Market report (January 2026) specifically highlighted that very small businesses pay the highest electricity unit rates, and that this differential widened during 2025. The non-domestic market in Great Britain covers approximately 2.4 million electricity meters, of which the majority serve small and medium-sized businesses.

Understanding business electricity bill components

When comparing supplier quotes, it is essential to compare total delivered costs rather than just unit rates. Unit rate (p/kWh) is the commodity cost of electricity consumed. Standing charge is a fixed daily cost covering network connection and administration, varying by region and meter type. Distribution Use of System (DUoS) charges vary by region and, for half-hourly customers, by time of day. Climate Change Levy is set at 0.775 pence per kWh for electricity from April 2025 (HMRC). VAT is 20% for most businesses, with a 5% reduced rate for qualifying low-usage premises consuming fewer than 33 kWh per day.

Half-hourly metering and what it means for pricing

Businesses with maximum demand exceeding 100 kilowatts are required under the Distribution Connection and Use of System Agreement (DCUSA) to be settled on a half-hourly basis, with consumption measured in 30-minute intervals. This enables more precise network cost allocation and access to time-of-use tariff structures. Half-hourly metered sites can be subject to Triad charges, which recover transmission system costs based on the three half-hour periods of highest national electricity demand in winter. Businesses on Triad-exposed contracts can significantly reduce costs by cutting consumption during Triad windows, which typically occur on weekday evenings from November to February.

Contract options for business electricity

Fixed-term contracts lock in the unit rate for 12, 24 or 36 months and are the most common structure for smaller businesses. Variable contracts move with wholesale market conditions. Deemed or out-of-contract rates apply where no formal supply agreement is in place and are typically the most expensive rates in the supplier's range. Pass-through contracts are available to half-hourly metered businesses: commodity costs are passed through at wholesale cost with a management fee on top. Flexible contracts allow larger businesses to purchase energy in tranches over a period ahead of delivery.

How to switch business electricity supplier

Check the contract end date and notice period first: most fixed-term business electricity contracts require 30 to 90 days notice before expiry. Missing this window typically causes automatic rollover at current supplier rates. Obtain the MPAN (Meter Point Administration Number) from the current electricity bill - it is required when obtaining quotes. Gather annual consumption data in kWh from the current bill or supplier. Obtain at least three quotes from a combination of comparison platforms and direct supplier approaches, confirming whether quotes include or exclude CCL, VAT and standing charges. Ask any broker to confirm commission or uplift in writing before signing. On the switch date, take and submit a meter reading to both outgoing and incoming suppliers.

Ofgem regulatory reforms affecting business electricity customers

The business electricity market is in a period of regulatory transition. Ofgem's review of the non-domestic energy market has identified significant consumer harm from practices including undisclosed broker commissions, misleading contract terms, and automatic rollover into uncompetitive rates. The incoming TPI regulatory framework is expected to require brokers and intermediaries to register with Ofgem, meet minimum conduct standards, and provide upfront disclosure of their remuneration to business customers.

Ofgem has also introduced enhanced supplier licence conditions relating to business customer protections, including requirements around contract renewal notification, deemed rate transparency, and debt block procedures. The Energy Act 2023 provided Ofgem with additional powers relevant to non-domestic markets, including enhanced enforcement capabilities against suppliers and intermediaries. Businesses that believe they have been mis-sold an energy contract or subjected to undisclosed commissions can raise a complaint through their supplier's formal complaints process and, if unresolved, refer to the Energy Ombudsman. The Energy Ombudsman's jurisdiction covers microbusinesses with fewer than 10 employees and annual turnover not exceeding two million euros. Larger businesses have access to civil dispute resolution routes.

What has driven business electricity price movements since 2021?

Business electricity prices are primarily driven by wholesale gas costs, since gas-fired generation sets the marginal price of electricity in the UK for a large proportion of trading hours. The 2021-23 energy crisis pushed non-domestic electricity prices to historic highs. Prices have fallen since 2023, though they remain above pre-2021 levels as of January 2026 per the Ofgem State of the Market report. The most recent DESNZ Quarterly Energy Prices data (March 2026) shows continued year-on-year declines in manufacturing sector prices in Q4 2025.

Frequently asked questions

Is there a price cap on business electricity in the UK?

No. The Ofgem default tariff cap applies only to domestic household electricity customers. Business electricity customers are not subject to a price cap and must negotiate their contracts commercially.

How long does it take to switch business electricity supplier?

The regulated switching process typically completes within 17 working days for non-half-hourly metered sites. Half-hourly metered sites may take longer where metering changes are required. The new supply agreement will specify the contracted start date.

Can a business switch supplier if in debt to its current supplier?

Under Ofgem supplier licence conditions, a supplier may object to a switch where a business customer has outstanding debt of 28 days or more - a debt block. The business should resolve any outstanding debt before initiating a switch, or negotiate a payment plan the supplier agrees will not trigger a block.

What is an MPAN?

A Meter Point Administration Number (MPAN) is the unique 21-digit reference number identifying a specific electricity supply point. It is required when obtaining competitive quotes or initiating a supplier switch and can be found on the current electricity bill.

What is the Climate Change Levy and do all businesses pay it?

The Climate Change Levy (CCL) is a government tax on energy used for business purposes, set at 0.775 pence per kWh for electricity from April 2025 (HMRC). Charities using energy for non-business purposes and businesses with a Climate Change Agreement may claim partial or full exemption.