How to save energy in a small business: where to start and what pays back

The cheapest kilowatt-hour is the one you never use, and it is also the only part of your bill that neither the market nor the regulator can change. This guide sets out a practical order of attack for a shop, cafe, salon, office or workshop: no-cost habits first, cheap fixes next, bigger upgrades last. Each step links to a deeper page.

Step 1: find out where the energy goes

You cannot cut what you cannot see. Gather 12 months of bills and write down your annual kWh for electricity and gas. Then walk around at closing time and list everything still running. Government guidance for businesses notes that nearly half of business electricity use happens outside standard operating hours, which is the first clue that waste is hiding in standby loads, always-on equipment and lighting left on.

For a more structured look, read about the business energy audit and energy monitoring.

Step 2: no-cost habits

• Switch off lights in empty rooms and when the premises close.
• Turn monitors, chargers, vending machines and kitchen kit off at the socket where it is safe to do so.
• Time heating and cooling to when people are actually there, including turning heating off at weekends and bank holidays if you can.
• Government advice suggests about 19°C for office heating and 24°C or above for cooling.
• Nominate one person to own energy and read the meter monthly.

A written closing checklist taped by the door is worth more than a poster. Include fridges that can safely be switched off, signs, kettles, hand dryers and PCs.

Step 3: low-cost fixes

• Lighting. Replace halogen and old fluorescent lamps with LEDs. Government guidance says LED upgrades pay back on average in under three years. See LED lighting for business.
• Heating controls. Reset timers, check thermostats and service the boiler. See business heating efficiency.
• Draught-proofing. Seal gaps around doors, windows and floors; window film is a cheap temporary secondary glazing.
• Maintenance. Clean fridge condensers and door seals and keep filters clean.

Quick wins by type of business

• Shops: lighting is often the biggest electricity item, so LED displays and zoned switching matter. See shop energy.
• Restaurants and cafes: kitchen extraction, fridges and ovens left on between services. See restaurant energy.
• Offices: computers, printers and heating schedules. See office energy.
• Salons: hot water, dryers and lighting. See salon energy.
• Pubs: cellar cooling and glass-washers. See pub energy.

In every case the method is the same: measure, switch off what is not needed, fix the cheap things, then invest where payback is clear. Rented premises add a wrinkle: ask your landlord who pays for upgrades to fixed items such as boilers and lighting circuits, since a lease may require consent before you change them, and a landlord might share the cost if the work improves the building.

Step 4: bigger investments

Once the basics are done, consider smart heating controls, lighting timers or sensors, better insulation, more efficient refrigeration, or generating your own power. Before spending, get an audit or at least three quotes, and work out the payback. See commercial solar panels, business battery storage, and grants and loans for efficiency. In England and Wales the Boiler Upgrade Scheme lists grants of £7,500 for air-source and ground-source heat pumps (more for some off-gas-grid properties replacing oil or LPG) in values that took effect on 21 July 2026; check on GOV.UK whether your building and installer qualify before relying on it.

Worked example: a small cafe

All figures here, including the lamp wattages and hours, are assumptions for illustration. A cafe uses 24,000 kWh of electricity a year at 27.2p/kWh, a bill of £6,528 before the standing charge and tax.

• Switching off equipment overnight saves 2 kWh a night: 2 x 365 = 730 kWh, which at 27.2p is £198.56.
• Swapping 20 halogen spotlights (50W) for LEDs (6W), burning 10 hours a day, 360 days: 44W x 20 = 0.88 kW; 0.88 x 3,600 hours = 3,168 kWh; x £0.272 = £861.70 a year.
• Lowering the heating setpoint by 1°C. The size of the saving varies by building, so take an assumed 5% of heating cost as an illustration: on a £3,000 gas bill, £3,000 x 5% = £150.

Together that is about £1,210 a year (£198.56 + £861.70 + £150), with the electricity items equal to about 16% of the electricity bill, from steps that cost little or nothing apart from the lamps. Your own numbers will differ, so do the sums with your wattages, hours and rates.

Cut the price as well as the usage

Saving energy and buying it well work together. If you are out of contract, you may be paying far more per unit than necessary; check how to get off deemed or out-of-contract rates and how to switch. Lower usage also puts you in a better position when you compare quotes, because you can request a quote based on your improved consumption.

Where to get free advice

The Carbon Trust, the Energy Saving Trust and the government's Energy Technology List (a database of tested efficient products) are the main starting points; there are separate schemes in Scotland, Wales and Northern Ireland. NetRegs lists them. Larger companies may also have legal duties; for example, the Energy Savings Opportunity Scheme applies to undertakings with 250 or more employees (or very high turnover and balance sheet), which most small firms are not.

Avoid common mistakes

Most failed savings projects fail for one of four reasons, so check yourself against this list before you spend anything.

• Buying kit before measuring. Know your baseline first.
• Choosing the lowest-priced LED. Check lifespan, brightness (lumens) and warranty.
• Ignoring comfort or health-and-safety. Don't turn off equipment that must stay on, such as some fridges and fire alarms.
• Forgetting to recheck. Compare bills a few months after each change, using the same months of the previous year, because weather and trading levels change the picture. Keep a simple log of each change, its cost and the date it was made, so that you can show the payback to your accountant or landlord.

Next steps

1. Record your annual kWh and cost per kWh.
2. Do a closing-time walk-round this week and write the checklist.
3. Price an LED swap for your most-used lights; see are LED lights worth it.
4. Use the cost calculator to track the effect on your annual bill.