Average Business Electricity Bill UK: Costs by Business Size

The phrase "average business electricity bill" hides enormous variation. A solo consultant working from a 40-square-metre commercial unit pays a different bill to a 50-employee office block, which pays a different bill again to a small manufacturer with a single CNC machine, which pays a different bill again to a national retailer with 200 sites and a half-hourly portfolio. Treating any single figure as representative is misleading.

What follows is the structured picture: average usage by business size, average unit rates by user category, and what the published Ofgem and DESNZ datasets actually say about the spread across the UK market.

Defining the business categories

UK business electricity statistics use a consistent four-category structure based on annual consumption, established in DESNZ's quarterly energy price publication. The bands are:

• Very small: under 20,000 kWh per year. Includes most home-based businesses, single-person consultancies, very small retail units, micro-cafés, and small professional services offices.
• Small: 20,000 to 500,000 kWh per year. Covers most independent shops, small offices up to around 30 employees, small restaurants, single-site workshops, and small hotels.
• Medium: 500,000 to 2 million kWh per year. Includes mid-sized offices, regional headquarters, larger restaurants and hospitality venues, medium manufacturers, small chains, and larger care providers.
• Large: 2 million to 20 million kWh per year. Covers large offices, major retail and hospitality operators, medium-to-large manufacturers, and most multi-site SME chains.

Above 20 million kWh per year, businesses are classed as extra large or industrial and are typically on bespoke half-hourly contracts negotiated bilaterally. The statistics published for industrial users come from a different DESNZ survey and reflect different commercial dynamics.

Average annual consumption by category

DESNZ publishes mean and median consumption figures for each band. The 2024 to 2025 figures, drawn from the supplier data underpinning the quarterly Industrial Electricity Prices in the UK release:

• Very small: median around 8,000 kWh, mean around 11,500 kWh.
• Small: median around 70,000 kWh, mean around 130,000 kWh.
• Medium: median around 1.1 million kWh, mean around 1.25 million kWh.
• Large: median around 7 million kWh, mean around 9 million kWh.

The mean sits above the median in every band because the distribution within each band is skewed: most businesses cluster at the lower end of their band, with a long tail of higher users. The median is usually the more useful benchmark for comparing your own business.

Average unit rates by category

The Ofgem retail prices report and DESNZ quarterly statistics together give an authoritative view of unit rates. Headline averages for non-domestic supplies in late 2024 to early 2025, including the Climate Change Levy, network and policy costs, and supplier margin:

• Very small: 28 to 31 pence per kWh average all-in.
• Small: 23 to 27 pence per kWh average.
• Medium: 20 to 24 pence per kWh average.
• Large: 17 to 22 pence per kWh average.

These averages mask large internal variation. Within the small business category, the best-priced quartile is typically paying 19 to 21 pence per kWh, while the worst-priced quartile sits at 28 to 32 pence. The variance is driven by contract timing, supplier choice, credit profile, and meter type, not by any single underlying factor.

Standing charges by category

Standing charges scale with meter type and connection size rather than business size, but the average across each business band gives a useful reference. Typical daily standing charges for non-domestic electricity in 2024 to 2025:

• Very small profile class 03: 35p to 55p per day, £130 to £200 per year per meter.
• Small profile class 04: 45p to 75p per day, £165 to £275 per year.
• Medium non-half-hourly: 65p to £1.20 per day, £240 to £440 per year.
• Large half-hourly: £1.50 to £4.00 per day equivalent, £550 to £1,460 per year.

For very small businesses, the standing charge alone can represent more than 10 percent of the annual electricity bill. This is the rationale for the de minimis VAT rules and is also why second meters at small sites are disproportionately expensive on a per-kWh basis.

What the average annual bill actually looks like

Combining median consumption, median unit rate, and median standing charge for each band produces a credible baseline annual figure. The numbers below are illustrative midpoints for 2024 to 2025, calculated from the components above:

• Very small: around £1,300 to £2,400 per year for a typical user using 6,000 to 10,000 kWh.
• Small: around £8,000 to £20,000 per year for a typical user using 40,000 to 100,000 kWh.
• Medium: around £230,000 to £290,000 per year for a typical user using 1 to 1.3 million kWh.
• Large: around £1.5 million to £2 million per year for a typical user using 7 to 9 million kWh.

These ranges should be used as sanity checks, not benchmarks. If your annual bill is far outside the range for your category, either your consumption is unusual for your size band or your unit rates are materially out of line with the market. Either case is worth investigating.

Why your business may sit above the average

Three common reasons your bill is higher than the category average:

1. You are on a deemed contract or out-of-contract rates. These tariffs apply when a fixed contract has expired without renewal. Out-of-contract rates are typically 30 to 60 percent higher than a freshly negotiated fixed contract. The fix is to negotiate a new contract immediately.
2. You locked in during a peak wholesale period. Many UK businesses signed three-year fixed contracts during the 2022 wholesale peak at unit rates above 50 pence per kWh. Those contracts roll off through 2025 and 2026 and are the single biggest source of bill reductions when they end.
3. Your supplier has not passed through wholesale price falls. On variable or pass-through contracts, suppliers should reflect changes in the wholesale market. In practice, the speed of pass-through varies materially between suppliers and is often slower than the change in your supplier's own input cost.

For a business sitting above the category average, the highest-impact action is usually a fresh competitive quote from at least three suppliers, run against your most recent 12 months of usage.

Regional variation in average bills

UK business electricity prices vary by region because Distribution Use of System charges differ by Distribution Network Operator area. The cheapest regions for business electricity tend to be in the North of England and Scotland. The most expensive regions for distribution costs tend to be in the South West, North Wales, and parts of London.

For a small business, the regional difference on a typical annual bill is around £200 to £600 per year. This is not a reason to relocate, but it is a reason to expect that two otherwise identical businesses in different regions will see different headline rates from the same supplier.

Frequently asked questions

Editorial disclaimer: Average figures in this guide are drawn from published Ofgem and DESNZ data for 2024 to 2025. Individual business bills vary by region, supplier, contract, meter type, and consumption pattern. Use the ranges as a sanity check, not as a guaranteed benchmark. Verify your own quote in writing before signing.

What is the average business electricity bill in the UK?

There is no single figure. A microbusiness typically pays £1,300 to £2,400 per year. A small business typically pays £8,000 to £20,000. A medium business typically pays around £230,000 to £290,000. Larger users are higher again.

Why are business electricity rates higher than domestic?

Business rates are not subject to the domestic price cap, and business supply contracts carry higher acquisition, billing, and credit-risk costs per kWh than mass-market domestic supplies. The Climate Change Levy also applies to business supplies, adding around 0.8p per kWh.

Are smaller businesses charged more per kWh?

Yes. The unit rate generally falls as consumption rises, because fixed costs are spread across more units and credit terms are typically better for larger users. The standing charge does the opposite: as a share of total bill, it shrinks for larger consumers.

How often do business electricity rates change?

Wholesale prices fluctuate daily. Fixed business contracts typically lock in rates for 12, 24, or 36 months. Variable and pass-through contracts can change monthly or quarterly depending on the contract terms.

Where does the published average data come from?

DESNZ publishes quarterly statistics on industrial electricity prices in the UK using supplier data returns. Ofgem publishes retail price data through its energy retail market reports.

How we verified this

This guide draws on DESNZ quarterly Industrial Electricity Prices in the UK statistics, Ofgem retail energy market reports, and supplier published tariff data for 2024 to 2025. Consumption band definitions and average prices reflect the published series at the time of writing. Standing charge ranges are derived from quote benchmarking across major UK business energy suppliers.

Sources

• DESNZ: Gas and electricity prices in the non-domestic sector
• DESNZ: Quarterly Energy Prices statistical publication
• Ofgem: Energy advice for businesses
• Ofgem: Retail market monitoring reports

For unit rate context across each fuel and supplier, see business electricity prices and business gas prices.