How much electricity does a small shop or office use in a year?
It varies too widely for one figure, so check your bill's annual usage. Useful markers: 33 kWh a day is about 12,045 kWh a year, and under 100,000 kWh makes you a microbusiness for electricity. Without a bill, estimate by multiplying equipment kilowatts by hours used.
It varies enormously, so there is no honest single number. A tiny office might use a few thousand kWh a year and a busy shop with chillers and long hours many times that. The best answer is your own bill, and the second best is a quick estimate from equipment and hours.
The quickest route: read your bill
Your latest bill or supplier portal shows your annual usage (sometimes labelled estimated annual consumption or annual quantity). Our guide to reading your business energy bill shows where. Smart meter readings give actual figures. If your bills are estimates, submit a reading first. See submitting a meter reading.
Useful dividing lines
- About 12,000 kWh a year is the same as 33 kWh a day, since 33 × 365 = 12,045. At or below 33 kWh a day on average, the supply is treated as domestic: no Climate Change Levy, and the reduced VAT rate (5%, or 0% for electricity in Great Britain from 1 October 2026 to 30 June 2027 under HMRC's temporary zero rate). See the 33 kWh limit.
- Under 100,000 kWh a year of electricity makes you a microbusiness for electricity, whatever your headcount. See what is a microbusiness.
- Up to 200,000 kWh can make you a small business under Ofgem's definitions.
Estimate it yourself: a worked example
Use kilowatts × hours open × days. These equipment loads are our illustrative assumptions, so replace them with the power ratings printed on your own kit.
| Item | Sum | kWh a year |
|---|---|---|
| 10 LED panels at 40W for 10 hours, 312 days | 0.4 kW × 10 × 312 | 1,248 |
| One chiller drawing 0.3 kW on average, 24 hours | 0.3 × 24 × 365 | 2,628 |
| Two tills and a router at 0.15 kW, 12 hours, 312 days | 0.15 × 12 × 312 | 562 |
| Total (before heating, kettles and others) | 4,438 |
Add electric heating, air conditioning and cooking and the total can multiply quickly. Always trim for your own opening hours.
What drives usage
- Opening hours and days.
- Refrigeration and cooling, which run all day.
- Electric heating or hot water.
- Equipment such as ovens, kilns and compressors.
- Building age and insulation.
A commercial comparison guide gives general usage bands by business size, but it does not give shop-by-shop averages, and we have not found a trustworthy sector benchmark to quote here.
Check against your bill
Once you have an estimate, compare it with your bill. If the bill says you use far more than you expected, look for equipment left running overnight, old fridges, electric heating, or a billing error. A smart meter in smart mode can show your overnight base load, which is the electricity used when nobody is in. A high base load is often the quickest saving to find.
Next steps
With your annual kWh in hand, try the business energy cost calculator, and see saving energy in a small business or energy monitoring to find where the units go.
Sources
General information only. Energy prices, rules and supplier terms change; check the latest position with your supplier, Ofgem or the Energy Ombudsman before you act.