Energy Savings Tips for Businesses

By the AI Edge UK Energy Team  |  February 2025  |  Applies to all UK commercial premises 

 Energy is one of the largest controllable costs in any business. Yet most finance directors, operations managers and business owners have never had their energy bills independently checked. Research consistently shows that the majority of UK businesses are overpaying — often significantly — due to errors, unfavourable contracts, and billing practices that suppliers have no incentive to correct. Here are the ten issues to check immediately. 

 When a fixed-term energy contract expires, suppliers automatically move you onto their default out-of-contract or deemed rate. These rates are almost always significantly higher than any negotiated deal — industry data consistently shows businesses on out-of-contract rates overpay by 30–50% per unit compared to a fixed contract. Suppliers are under no obligation to prominently notify you when your contract is nearing its end. Many contracts also contain short renewal windows — sometimes as little as 30 days before expiry — outside which you cannot negotiate. Miss this window and you could be stuck on punishing rates for 12 months or more. This is the single biggest energy cost issue for UK businesses and affects an estimated one in three commercial customers at any given time. 

 Most businesses correctly pay 20% VAT on energy. However, there is one frequently missed exemption that applies to businesses of all types: the low-consumption reduced rate. Under Schedule 7A of the Value Added Tax Act 1994, any business supply of electricity consuming less than 33 kWh per day (approximately 1,000 kWh per month) qualifies for the 5% reduced VAT rate on that supply. For gas, the threshold is less than 145 kWh per day. This catches many small offices, retail units, storage units, outbuildings, satellite sites and secondary meters. This is particularly relevant for businesses with multiple meters across a site — each supply is assessed individually. A main factory meter may be above the threshold, but a secondary office or welfare unit may qualify for 5% on that specific supply. Suppliers apply 20% VAT by default and do not proactively check your consumption against the threshold. You have been overpaying if any supplies fall below the limit and you have not submitted a VAT Declaration. 

 If you arranged your current energy contract through a broker or Third Party Intermediary (TPI), there is a strong chance a commission — sometimes called an uplift — is embedded in your unit rate. Your broker is being paid by the supplier out of every unit of energy you consume, for the entire duration of your contract, without clear disclosure to you. Ofgem has been increasingly vocal about this practice. A business on a 3-year contract paying a 1p/kWh hidden uplift on 500,000 kWh per year is paying an invisible £15,000 in commission over the contract term — without knowing it. Recent case law following the Supreme Court's decision in Johnson v FirstRand Bank [2024] has strengthened the ability of commercial customers to challenge undisclosed commissions where there was a conflict of interest. 

 If your bill shows the letter "E" next to any meter reading, that figure is estimated. For businesses with variable energy usage — seasonal operations, shift patterns, new equipment — estimated readings can diverge dramatically from actual consumption. Systematic overestimation means you are paying for energy you have not used. Systematic underestimation stores up a large catch-up bill that arrives without warning and can cause cash flow problems. Smart meters eliminate this problem entirely — all businesses are entitled to request one from their supplier free of charge. 

 The standing charge is the fixed daily fee you pay simply to remain connected to the grid — regardless of how much energy you consume. Unlike domestic bills, commercial standing charges are completely unregulated. Suppliers can set them at whatever level they choose. Businesses with multiple meters across a site may be paying standing charges on meters with very low or zero usage. Each meter typically attracts its own daily standing charge whether it is used or not. If you are on an out-of-contract rate, your standing charge will typically be the supplier's standard default rate, which is often materially higher than the standing charge you agreed in your original contract. 

 The Climate Change Levy (CCL) is an environmental tax added to commercial energy bills, introduced under Schedule 6 of the Finance Act 2000. Most businesses pay it — but several categories are fully or partially exempt and are routinely billed incorrectly: Charities and non-profits using energy for non-business purposes are exempt from CCL on that portion. Energy-intensive manufacturers who have signed a Climate Change Agreement (CCA) with the Environment Agency receive an 80–92% discount on CCL. Businesses generating their own electricity via solar or CHP are exempt from CCL on electricity they self-consume. Low-consumption supplies that qualify for the 5% reduced VAT rate are also exempt from CCL. Suppliers apply CCL by default and rarely check exemption eligibility. 

 Every electricity meter in the UK is assigned a Profile Class (01–08) that describes your consumption pattern and determines how your bills are calculated. If your meter has been assigned the wrong profile class, you are being billed on the wrong basis. Businesses consuming over 100,000 kWh of electricity per year on a single supply are legally required to use a Half-Hourly (HH) meter (Profile Class 00). Half-hourly meters record consumption every 30 minutes and typically attract different network charges. Profile class errors tend to accumulate silently over years and are almost never caught without a specialist review. 

 Your MPAN (Meter Point Administration Number — 13 digits, electricity) and MPRN (Meter Point Reference Number — 10 digits, gas) are the unique identifiers tied to specific physical meters. If these numbers do not exactly match the meters on your premises, you could be paying another premises' bill. This is more common than most people realise, particularly for businesses that have recently moved into new premises, undergone building works, or inherited a legacy supply arrangement from a previous tenant. MPAN and MPRN errors are classed as supplier billing errors and must be corrected and refunded without challenge under Ofgem's billing standards. 

 Commercial energy bills can contain many separate line items beyond the basic unit rate and standing charge — transportation and distribution charges, balancing charges, capacity charges, meter operator fees, data collection fees, and more. In 2024, Ofgem's billing compliance review found that ten major energy suppliers had applied systematic overcharges to over 34,000 business accounts, resulting in forced refunds of more than £7 million. Common errors included duplicated standing charges after supplier system migrations and charges applied at the wrong contract rate. If your business has experienced a supplier switch, a tariff change, or a billing system migration in the last three years, the risk of an error on your account is materially higher. 

 The most expensive error of all is the one that's never been looked for. The vast majority of UK businesses have never had their energy bills independently reviewed. They auto-renew contracts, assume bills are broadly correct, and focus attention elsewhere. Meanwhile the issues above accumulate undetected, often for years. An independent energy audit looks at everything simultaneously — your contract status, tariff classification, VAT rate, CCL status, meter data, standing charges, and billing line items. The result is a clear picture of what you're actually paying, what you should be paying, and what you can legitimately reclaim. Most businesses that undergo a first audit find at least one significant issue. Many find several. The combined value of overcharging identified across our clients averages over £15,000 per business. 

Quick Reference Checklist — All 10 Issues at a Glance

Your Legal Rights Under UK Law

 Most business owners do not realise that UK law gives them strong, enforceable rights to recover money incorrectly charged by energy suppliers — regardless of whether the supplier acknowledges the error, and regardless of whether you are still with the same supplier. 

We Do All the Work. No Win, No Fee.

 Our energy bill review is built into our standard commercial solar assessment — we analyse your bills as part of understanding your energy baseline at no extra cost to you. 

The AI Edge UK Team

Disclaimer: This guide is for general information only and does not constitute legal, financial or tax advice. The law cited is correct as of February 2025 but may be subject to change. Always seek independent professional advice before making a claim. AI Edge (UK) Ltd is not a law firm or financial adviser. © 2026 AI Edge (UK) Ltd · The Mansions, Mill Lane, London · tony@aiedgeuk.com · 07941 256010