Electricity is one of the least predictable overheads a UK business carries, and unlike your rent or your accountant’s fee, it can move mid-contract if you are not on a fixed deal. This guide covers current 2026 rates, what actually makes up your bill, and how to reduce it without cutting corners on supply.
Quick Answer
UK businesses paid an average of 22p to 30p per kWh for electricity in 2026, with small businesses averaging closer to 28p to 30p per kWh. A daily standing charge of roughly 45p to 65p applies on top, regardless of usage. Larger businesses on half-hourly meters typically pay less per unit, closer to 17p to 22p, because they buy in volume.
Current Business Electricity Rates by Business Size
| Business Size | Typical Annual Usage | Average Rate per kWh |
|---|---|---|
| Micro business | Under 5,000 kWh | 28p to 32p |
| Small business | 5,000 to 15,000 kWh | 26p to 30p |
| Medium business | 15,000 to 55,000 kWh | 23p to 26p |
| Large business, half-hourly metered | Above 55,000 kWh | 17p to 22p |
Smaller businesses consistently pay a higher unit rate than larger ones, since suppliers price in volume discounts for high-usage customers. This is the reverse of what many new business owners expect, and it is worth budgeting for accordingly, alongside other allowable business expenses.
What Makes Up Your Business Electricity Bill
Two figures drive almost every business electricity bill.
- Unit rate: the price charged per kilowatt hour of electricity actually used
- Standing charge: a fixed daily fee covering grid connection costs, charged regardless of how much electricity you use
Standing charges have risen faster than unit rates in recent years and now range from around 45p to over £1 a day depending on your supplier and site. On top of both, business electricity carries 20% VAT as standard, unlike the reduced 5% VAT rate that applies to most domestic electricity.
Why Business Electricity Costs More Than Domestic Electricity
Business electricity is not covered by the domestic Ofgem price cap, which means commercial rates can move more freely with the wholesale market. Businesses also pay the standard 20% VAT rate rather than the domestic 5% rate, and many face the Climate Change Levy, an additional charge on business energy use designed to encourage efficiency. Together, these push commercial rates meaningfully above what a household pays for the same unit of electricity.
Fixed vs Variable Business Electricity Contracts
| Contract Type | How It Works | Best For |
|---|---|---|
| Fixed rate | Unit price locked for the contract term, typically 12 to 36 months | Businesses that want predictable, budgetable costs |
| Variable rate | Price moves with the wholesale market | Businesses comfortable with fluctuation, hoping to catch falling prices |
| Out-of-contract rate | Applied automatically if you do not renew or switch | Nobody, deliberately; these rates are set high to encourage switching |
Falling onto an out-of-contract rate is one of the most common and avoidable ways UK businesses overpay. Diarising your renewal date two to three months in advance gives enough time to compare the market before your existing deal lapses.
How to Reduce Your Business Electricity Costs
- Compare quotes from several suppliers before renewing, rather than accepting an automatic rollover
- Fix your rate ahead of contract expiry if you want budget certainty, since renewing 2 to 3 months early usually avoids rollover pricing
- Check whether your standing charge, not just your unit rate, is competitive, since a low unit rate can hide a high standing charge
- Review your actual usage patterns and consider whether off-peak shifting or efficiency upgrades would meaningfully cut consumption
- Ask about capital allowances if investing in energy efficiency equipment, since certain purchases may qualify for tax relief
Business Electricity as a Tax-Deductible Expense
Electricity used for genuine business purposes is an allowable expense, deductible against profit before Corporation Tax for limited companies, or against income for sole traders through Self Assessment. If you work from home, only the business proportion of your household electricity qualifies, which is where HMRC’s simplified expenses flat rates can help, covered in our guide to business expenses in the UK.
Frequently Asked Questions
What is the average business electricity rate in the UK?
Around 22p to 30p per kWh in 2026, with small businesses typically paying towards the higher end of that range, plus a daily standing charge of 45p to 65p.
Why do small businesses pay more per kWh than large businesses?
Larger businesses buy electricity in greater volume and often use half-hourly metering, which gives suppliers more predictable demand data and allows them to offer lower unit rates.
Is business electricity VAT rated differently to domestic electricity?
Yes. Business electricity is charged at the standard 20% VAT rate, compared with the reduced 5% rate most households pay.
Can I claim business electricity as an expense?
Yes, electricity used for genuine business purposes is an allowable expense. If you work from home, only the business-use proportion qualifies.
Key Takeaways
- UK business electricity averaged 22p to 30p per kWh in 2026, plus a daily standing charge
- Smaller businesses typically pay a higher unit rate than larger, half-hourly metered businesses
- Business electricity carries 20% VAT, compared with 5% for most domestic electricity
- Renewing 2 to 3 months before your contract ends avoids expensive out-of-contract rates
- Business electricity is a deductible expense, apportioned for business use if you work from home
About the Author
This guide was prepared by the Business Mine editorial team, who research and write practical UK business, tax and finance guides. Information is checked against current market data at the time of publication. This article is provided for general information only and does not constitute financial advice.
