Every restaurant owner knows their food costs down to the penny. You know what a portion of chips costs, what your chicken supplier charges per kilo, and exactly how much a bottle of house wine sets you back. But ask most restaurant owners what their commercial dishwasher costs to run per year, and you'll usually get a blank look.
That's understandable. Energy costs are bundled into one monthly bill and it's hard to know what's driving it. But here's why it matters: a typical UK restaurant spends between £15,000 and £30,000 per year on energy, using 70,000–100,000 kWh of electricity alone. That makes energy one of your top three operating costs — and unlike food and labour, it's the one most owners do the least to optimise.
The UK already has the highest industrial electricity prices in Europe — 89% above the EU14 median. And with hospitality businesses typically spending 10–25% of their total revenue on energy, understanding where every kilowatt-hour goes isn't just useful — it's essential for survival.
Equipment-by-Equipment: What Your Kitchen Really Costs to Run
Let's break it down. These figures are based on typical UK commercial kitchen equipment, current electricity rates, and standard restaurant trading hours. Your exact figures will vary depending on your specific equipment, menu, and opening hours.
Commercial Range Ovens (x3)
Your ovens and ranges are the workhorses of the kitchen. A busy restaurant running three commercial ranges during service will use roughly 18,000–40,000 kWh per year, costing £5,400–£12,000.
Saving tip: Use induction hobs where possible. They're around 90% energy-efficient compared to roughly 40% for traditional gas burners. They heat up faster, waste less energy, and keep your kitchen cooler (which means your HVAC works less hard too).
Commercial Dishwashers
A commercial dishwasher cycling continuously during service can use 5,000–10,000 kWh per year, costing £1,500–£3,000. That's before you factor in the hot water needed to feed it.
Saving tip: Run full loads wherever possible, and schedule heavier cleaning cycles during off-peak hours if your tariff supports it.
Walk-in Cold Rooms & Refrigeration
Your cold room never switches off. Running 24 hours a day, 365 days a year, a walk-in cold room typically uses 8,760–17,520 kWh per year, costing £2,600–£5,300.
Saving tip: Check door seals quarterly. A compromised seal forces the compressor to work overtime. Keep the condenser coils clean — dirty coils reduce efficiency by up to 25%.
HVAC & Climate Control
This is the one that catches many restaurant owners by surprise. Between keeping the kitchen ventilated, the dining room comfortable in summer, and the whole building heated in winter, HVAC systems can account for 8,000–20,000 kWh per year — that's £2,400–£6,000.
Saving tip: Change HVAC filters quarterly. Dirty filters increase energy consumption by around 15%. Smart thermostats that adjust based on occupancy can also make a significant dent.
How much could your restaurant save?
Our free calculator gives you a quick estimate based on your restaurant type and current spend. No email required.
Extraction & Ventilation Systems
Commercial kitchen extraction is a legal requirement while cooking. Depending on your kitchen size and the power of your system, extraction can use 5,000–15,000 kWh per year, costing £1,500–£4,500.
Saving tip: Consider variable-speed drives on your extraction fans. Instead of running at full power constantly, they adjust to the actual demand. This alone can cut extraction energy costs by 30–50%.
Lighting & Ambience
Restaurants often need more nuanced lighting than other hospitality businesses — from bright task lighting in the kitchen to dimmable mood lighting in the dining room. Total lighting costs typically come to 4,000–10,000 kWh per year, or £1,200–£3,000.
Saving tip: LED retrofits are one of the fastest payback investments you can make. LED bulbs use up to 80% less energy than halogen equivalents and last 15–25 times longer. Install motion sensors in storage areas, corridors, and toilets.
The Full Picture: What It All Adds Up To
| Equipment | Annual kWh | Annual Cost |
|---|---|---|
| Commercial Range/Oven (x3) | 18,000–40,000 | £5,400–£12,000 |
| Commercial Dishwasher | 5,000–10,000 | £1,500–£3,000 |
| Walk-in Cold Room | 8,760–17,520 | £2,600–£5,300 |
| HVAC System | 8,000–20,000 | £2,400–£6,000 |
| Extraction System | 5,000–15,000 | £1,500–£4,500 |
| Lighting & Ambience | 4,000–10,000 | £1,200–£3,000 |
| Total Range | 48,760–112,520 | £15,100–£33,800 |
These numbers make one thing very clear: your energy tariff matters enormously. Even a small difference of 2–3p per kWh across 80,000 kWh of annual consumption adds up to £1,600–£2,400 per year. That's the difference between a good month and a bad one.
Three Strategies That Actually Move the Needle
Strategy 1: Get on the Right Tariff
This is the single biggest lever you have. A competitive fixed-rate deal on a high-consumption restaurant can save you thousands per year compared to a deemed rate or a poor renewal. We help restaurant owners across the UK compare suppliers and switch — saving an average of £2,400 per year.
Strategy 2: Target Your Biggest Consumers First
Don't try to optimise everything at once. Focus on the equipment that uses the most energy. For most restaurants, that's cooking equipment, followed by refrigeration and HVAC. Even a 10% efficiency gain on your ovens is worth more than a 50% gain on your lighting.
Strategy 3: Match Your Tariff to Your Usage Pattern
If your restaurant does heavy prep in the morning and service in the evening, a time-of-use tariff might save you money on your prep hours. If you're a steady-state operation running evenly across the day, a flat-rate fixed deal is probably better. The point is: your tariff should match your business, not the other way around.
Let us find the right tariff for your restaurant
We specialise in energy for hospitality businesses. Tell us about your restaurant and we'll find the best deal from our panel of trusted UK suppliers. Free, no obligation.
Don't Let Energy Be the Cost You Ignore
You scrutinise every other line on your P&L. Your food costs are managed to the decimal point. Your labour is rostered down to the half-hour. Energy deserves that same attention.
The reality is that 27% of UK small businesses are struggling with energy costs, and restaurants are among the hardest hit. But the businesses that take control of their energy — by understanding their consumption, getting on the right tariff, and making smart efficiency investments — are the ones that protect their margins and survive.
We specialise in helping hospitality businesses cut their energy costs, saving an average of £7,200 per year. If you haven't reviewed your restaurant's energy contract recently, now is the time.