Business Energy Costs Explained

An office runs lights, computers and heating; a bakery, laundry or workshop runs power-hungry equipment for hours. Energy-intensive sectors pay far more per year and are often quoted differently by suppliers.

The more kWh you use, the larger the bill — but bigger users usually secure lower unit rates. Suppliers price by consumption band, so your annual usage is the single biggest driver of your rate.

A 24/7 site uses far more energy than a nine-to-five office. Longer trading hours, weekend opening and multiple shifts all lift consumption and change how demand spreads across the day.

When you use energy matters as much as how much. Large loads concentrated at peak times can attract higher charges, especially on half-hourly meters where capacity and demand are priced separately.

Whether you have a standard, smart or half-hourly (HH) meter affects how you're billed. HH meters record usage every 30 minutes and unlock more granular — often cheaper — pricing for larger sites.

Sites with a maximum demand above roughly 100 kW are usually settled half-hourly. This brings capacity charges, DUoS and TNUoS network costs, and pricing based on your actual load profile.

Network (distribution) costs vary across the UK's regions, so an identical business can pay different standing charges and unit rates in the North West versus London or the South West.

Fixed contracts lock your unit rate for 1–5 years; the rate you're offered depends heavily on wholesale prices the day you sign. Renewing early or out of contract on 'deemed' rates can cost far more.

A structured audit finds where energy is wasted — from heating empty rooms to inefficient equipment — and prioritises the changes with the fastest payback.

Switching to LED can cut lighting energy by 60–80%. For shops, warehouses and offices with long hours, it's often one of the quickest wins with a payback under two years.

Smart and half-hourly meters plus monitoring software reveal exactly when and where you use energy, so you can cut standby loads and shift usage away from peaks.

Commercial rooftop solar can cover a large share of daytime demand, insulating you from price rises and earning export income via the Smart Export Guarantee.

Replacing gas or electric heating with a heat pump can cut heating costs and carbon, especially for premises with steady heating demand and good insulation.

Timers, occupancy sensors, voltage optimisation and building controls stop you paying to run equipment and lighting when no one's there.

Simple habits — switching off equipment, closing fridge doors, reporting faults and sensible thermostat settings — add up across a workforce for zero capital cost.