Most Energy Efficient Businesses in the UK

Written by Shay Ramani

Reviewed by Prajesh Manvar

6 min read

Updated: 11 Aug 2026

The most energy efficient businesses in the UK are not defined by their sector but by how well they measure, manage and cut their energy use, starting with lighting, heating and monitoring. Official case studies show a Bournemouth nursery cut its energy bills by around 60% after fitting smart meters and LED lighting, while a Nottingham sewing centre saved 25% on lighting costs a year by switching to LEDs, according to the Business Energy Efficiency campaign on GOV.UK.

For a small business owner on a business energy contract, energy efficiency is separate from the tariff you are on, but the two work together. Cutting how much energy you use lowers your bill whatever your unit rate, and a lower usage profile can improve the deals you are offered at renewal. Free Price Compare sources this guide from Ofgem, GOV.UK and official business energy efficiency case studies.

This is a practical explainer of which measures deliver the biggest savings, how business energy contracts differ from domestic ones, and what grants and support exist in 2026.

Quick Answer: Most Energy Efficient Businesses in the UK

The biggest quick wins for most businesses are LED lighting, smart meters and heating controls – a Nottingham firm cut lighting costs 25% a year with LEDs alone (GOV.UK case studies).
Business energy contracts are not covered by the Ofgem price cap that protects domestic customers, so switching and renewal timing matters more.
Business energy contracts almost always have a fixed term and a notice period – miss it and you can be rolled onto expensive out-of-contract or deemed rates.
From April 2026, around 500 energy-intensive UK businesses will save up to £420 million a year as the electricity network charge discount rises from 60% to 90% (GOV.UK, October 2025).
The Energy Savings Opportunity Scheme (ESOS) requires large UK businesses to audit their energy use every four years; most small businesses are exempt but can use the same audit approach voluntarily.

Last updated: August 2026

Written by the Free Price Compare editorial team | Reviewed August 2026

Content in this article

What makes a business energy efficient?
Which UK businesses and sectors use the most energy?
How can a business improve its energy efficiency?
How do business energy contracts differ from domestic ones?
- What are the main business energy contract types?
- How do notice periods and switching work for business energy?
How much energy does a typical small business use?
What grants or funding are available for business energy efficiency?
How do I make my business more eco-friendly and green?
FAQs about most energy efficient businesses

What makes a business energy efficient?

A business is energy efficient when it delivers the same output using less energy, which comes down to measuring usage first and then targeting the biggest wasters: heating, lighting, process heat and idle equipment. Official case studies published on GOV.UK show the pattern clearly – a Bournemouth nursery reported saving around 60% on its energy bills after fitting smart meters and LED lighting, and a Nottingham sewing centre cut lighting costs by 25% a year after replacing old lights with LEDs. Energy efficiency is not about your energy supplier or tariff. It is about your building, your equipment and your habits, all of which you control regardless of who you buy your gas and electricity from.

The most efficient businesses treat energy as a managed cost rather than a fixed overhead. That means knowing where the energy goes before spending money to reduce it, which is why monitoring is the foundation of every credible efficiency programme.

Which UK businesses and sectors use the most energy?

The most energy-intensive UK businesses are heavy industry and manufacturing – steel, cement, glass and chemicals – which use large volumes of electricity and process heat that are hard to reduce without major investment. The government recognised this in October 2025 when it announced that around 500 of the UK’s most energy-intensive businesses will save up to £420 million a year from April 2026, as the discount on electricity network charges for these sectors rises from 60% to 90%, according to GOV.UK. Beyond heavy industry, businesses that heat water or large spaces continuously – hospitality, leisure centres, swimming pools, nurseries and care settings – also sit at the higher end of energy use.

Most small and medium businesses are not energy-intensive in that sense, but they still waste a meaningful share of what they buy through poor heating control, inefficient lighting and equipment left running out of hours. For those businesses, the savings come from operational changes rather than industrial support schemes.

How can a business improve its energy efficiency?

A business improves its energy efficiency by following a measure-then-target approach: install a smart meter to see where energy is used, fix the cheap and quick problems first, then invest in longer-term upgrades. Official GOV.UK-backed guidance advises businesses to monitor usage, identify where energy is consumed, upgrade lighting and heating, reduce process-heat waste and switch to low-carbon electricity. The order matters because you cannot manage what you do not measure, and a smart meter or monitoring system turns a guess into a plan.

The measures that consistently deliver savings across the official case studies are practical and not sector-specific:

LED lighting – the single most reliable quick win, cutting lighting energy sharply and lasting far longer than older bulbs.
Smart meters and monitoring – show real usage patterns so you can spot equipment left on and heating running when the premises are empty.
Heating controls and insulation – thermostat scheduling, draught-proofing and roof insulation reduce wasted heat. E.ON Next business guidance recommends at least 270mm of roof insulation.
Equipment scheduling – timers and switch-off routines stop machines, screens and appliances drawing power out of hours.
Low-carbon and process-heat upgrades – heat pumps and process improvements cut heating bills for businesses that heat water or large spaces.

Our guide to making a commercial building more energy efficient goes through these upgrades in more detail.

Read practical energy saving tips for your office

How do business energy contracts differ from domestic ones?

Business energy contracts differ from domestic ones in three ways that directly affect your costs: they are not covered by the Ofgem price cap, they almost always run for a fixed term, and they carry a notice period you must meet to switch. The Ofgem energy price cap protects domestic customers by limiting unit rates and standing charges for a typical household, but it does not apply to business supply. That means a business tariff is whatever you agree with the supplier, and a poor deal is not capped by the regulator.

Business contracts also cannot be cancelled with a cooling-off period in the way many domestic deals can, and dual-fuel single bills are less common because gas and electricity are often contracted separately. Understanding these differences protects you from the two most expensive mistakes: missing your renewal window and being rolled onto out-of-contract rates.

What are the main business energy contract types?

Business energy contracts fall into a few main types, each affecting how much certainty you have over your unit rate. A fixed-term contract locks your unit rate and standing charge for a set period, usually one to five years, giving budget certainty but no benefit if wholesale prices fall. A variable or flexible contract lets the rate move with the market, which suits businesses that can manage price risk. Deemed and out-of-contract rates are the expensive default you fall onto if you let a fixed term lapse without agreeing a new deal, and they are typically the highest rates a supplier charges. Our explainer on business gas prices and contracts breaks down how each works.

How do notice periods and switching work for business energy?

Business energy switching depends on giving notice within your contract’s renewal window, which is the single most important date to know. Most business energy contracts require you to give notice – often set out in the contract terms – before the end of the fixed term, otherwise you can be automatically renewed or moved onto costly out-of-contract rates. Unlike domestic switching, you cannot always leave on short notice, so the practical rule is to note your contract end date and start comparing deals several months before it. Reading your bill carefully, as covered in our guide to understanding your business energy bill, tells you your contract end date and notice period.

Know your renewal window

Check your contract end date and notice period before you compare – it is the biggest driver of what you pay next.

See energy switching tips

How much energy does a typical small business use?

A typical small business uses far less energy than heavy industry, but usage varies enormously by premises type, opening hours and whether it heats water or large spaces. A small office running standard IT and lighting during business hours sits at the low end, while a small restaurant, salon or nursery that heats water and runs equipment continuously uses considerably more. Because there is no single average that fits every business, the useful figure is your own consumption, which a smart meter records automatically.

The value of knowing your own usage is that it lets you benchmark before and after each change – so when you fit LEDs or reschedule heating, you can see the effect in kilowatt-hours rather than guessing. Installing a smart meter, explained in our guide to smart meters for your business, is the starting point for any serious efficiency effort.

Compare energy options and check current tariffs

What grants or funding are available for business energy efficiency?

Business energy efficiency support in the UK comes through a mix of tax reliefs, audit schemes and sector-specific relief rather than a single universal grant, so what you can access depends on your size and sector. The Energy Savings Opportunity Scheme (ESOS) requires large businesses to carry out an energy audit every four years, run by the Environment Agency, and while most small businesses are exempt, the same audit approach is worth adopting voluntarily. Larger businesses also report through Streamlined Energy and Carbon Reporting (SECR) and may pay the Climate Change Levy, with Climate Change Agreements offering reduced rates for energy-intensive sectors that meet efficiency targets.

For finance, the British Business Bank signposts sustainability and efficiency funding routes for smaller firms, and the October 2025 GOV.UK announcement on cutting electricity network charges for energy-intensive sectors shows government support is currently focused on the heaviest users. Available grants and reliefs change, so check the latest position on GOV.UK before relying on any specific scheme. Our guide on whether businesses pay less for energy puts these reliefs in context.

How do I make my business more eco-friendly and green?

Making a business more eco-friendly starts with cutting the energy you waste, then switching the energy you do use to low-carbon sources – reducing use first is cheaper and delivers savings straight away. The official trend in GOV.UK guidance is measurement first: monitor usage, target heating, lighting and process heat, then move to low-carbon electricity and equipment. Efficiency and sustainability point the same way for most businesses, because the changes that cut carbon – LEDs, better heating control, heat pumps, monitoring – also cut bills.

Engaging staff matters as much as technology. Switch-off routines, sensible thermostat settings and reporting faults quickly cost nothing and hold the gains from your capital upgrades. A green business is not built on one big purchase but on measurement, targeted upgrades and habits that stick.

Find cheaper business electricity

FAQs about most energy efficient businesses

Does the Ofgem price cap apply to business energy?

No. The Ofgem energy price cap applies only to domestic customers, limiting unit rates and standing charges for a typical household. Business energy contracts are not capped, so your unit rate is whatever you agree with the supplier. This is why comparing deals and switching at renewal matters more for businesses than for households.

What happens if I miss my business energy contract notice period?

If you miss the notice period on a fixed-term business energy contract, you can be automatically renewed or moved onto out-of-contract or deemed rates, which are usually the highest a supplier charges. To avoid this, note your contract end date and start comparing deals several months before it. Your bill sets out both the end date and the required notice period.

What is the cheapest way for a business to cut its energy bills?

The cheapest quick wins are switching to LED lighting, fitting a smart meter to spot waste, and using heating controls to stop heating empty premises. A Nottingham firm cut lighting costs by 25% a year with LEDs alone, according to GOV.UK case studies. These cost little compared with major upgrades and start saving immediately.

How much can a small business realistically save on energy?

Savings vary by premises and starting point, but official case studies show meaningful reductions from basic measures. A Bournemouth nursery reported saving around 60% after fitting smart meters and LED lighting. Most small businesses will not match that, but combining lighting, monitoring and heating controls typically delivers a clear reduction in usage and bills.

Is a fixed or variable business energy contract better?

A fixed contract locks your unit rate and standing charge for the term, giving budget certainty but no benefit if wholesale prices fall. A variable contract moves with the market, which can be cheaper when prices drop but riskier when they rise. Which suits you depends on your appetite for price risk and how tightly you need to control costs.

Which businesses use the most energy in the UK?

Heavy industry uses the most energy – steel, cement, glass and chemicals – because of the electricity and process heat involved. The government confirmed in October 2025 that around 500 of the most energy-intensive UK businesses will save up to £420 million a year from April 2026. Among smaller businesses, those heating water or large spaces continuously, such as hospitality and leisure, use the most.

Do I need a smart meter for my business?

You do not need a smart meter by law, but it is the most useful tool for improving efficiency because it records your actual usage and shows when energy is wasted. Without it, cutting bills is guesswork. Smart metering lets you benchmark usage before and after each change, so you can see which measures actually work.

What is the Energy Savings Opportunity Scheme (ESOS)?

ESOS is a mandatory energy audit scheme for large UK businesses, requiring them to assess their energy use and identify savings every four years. Most small and medium businesses are exempt, but the audit approach is worth adopting voluntarily. It complements Streamlined Energy and Carbon Reporting, which requires larger firms to report energy use and carbon emissions.

How is switching business energy different from switching at home?

Switching business energy is tied to your contract's notice period and renewal window, whereas domestic switching is more flexible and often has a cooling-off period. Business contracts usually cannot be left on short notice, and gas and electricity are often contracted separately. The practical rule is to compare well before your fixed term ends rather than waiting until it lapses.

Are there grants for making my business more energy efficient?

Support comes mainly through tax reliefs, audit schemes and sector-specific relief rather than one universal grant. The British Business Bank signposts sustainability finance for smaller firms, and Climate Change Agreements offer reduced Climate Change Levy rates for energy-intensive sectors that hit efficiency targets. Schemes change, so check the current position on GOV.UK before relying on any specific one.

Does improving energy efficiency also reduce my carbon footprint?

Yes. The measures that cut energy use – LED lighting, better heating control, heat pumps and monitoring – also cut carbon emissions, so efficiency and sustainability point the same way. Reducing use first is cheaper than switching to low-carbon supply and delivers savings straight away. Combining both gives the biggest reduction in cost and emissions.

Can staff behaviour really affect business energy bills?

Yes, and it costs nothing to change. Switch-off routines, sensible thermostat settings and reporting faults quickly hold the savings from your capital upgrades and prevent equipment running out of hours. Behaviour is what stops a good LED or heating investment being undone by machines and lights left on overnight.

Also Read Related Articles

Information correct as of 5 August 2026. Prices, tariffs, policy details and providers change frequently, so please check the latest details before making a decision. This article is for general information only and does not constitute financial advice. Free Price Compare is authorised and regulated by the Financial Conduct Authority (FCA).