Energy bills are complex, and while most businesses keep a close eye on their overall energy spend, it's not always easy to understand exactly what they're being charged for.
From incorrect meter readings and billing errors to overlooked charges and incorrect consumption, there are several areas where businesses could be paying more than they should without realising it.
Here, our Head of Energy Bureau, Lindsay Williams, shares some of the common hidden costs to look out for, along with practical advice to help businesses check their bills, identify potential savings and take greater control of their energy spend.
1. Are you being billed for the energy you've actually used?
One of the first things we look at when reviewing energy invoices is whether the consumption being charged accurately reflects what a business has actually used.
Although smart and automated meter readings have improved the availability of consumption data, estimated readings and data issues can still occur, particularly where there are problems with meter communications or gaps in the information being collected. If your invoice is based on estimated consumption rather than actual readings, you could be paying too much or too little, with the difference potentially being corrected through a future bill.
For businesses with fluctuating energy requirements, this can make budgeting more difficult and create unexpected costs further down the line.
To get a clear picture, check whether invoices are based on actual or estimated readings, whether consumption looks reasonable compared with previous months, and whether any unusual increases can be explained by changes in business activity.
2. Are you paying the rates agreed in your contract?
It's important to make sure the terms agreed in your energy contract are being correctly applied throughout the contract.
Billing errors can arise from several different areas, such as incorrect unit rates, standing charges, contract dates or other charges that don't reflect the agreed commercial terms. These differences aren't always obvious when looking at an individual invoice, particularly if the overall monthly amount appears broadly in line with expectations.
Over time, however, even relatively small discrepancies can add up, especially for businesses with higher consumption or multiple energy accounts. Keep a clear record of contractual terms and regularly compare them against invoices, rather than assuming that everything is correct once a contract has been signed.
3. Do you understand the non-commodity charges on your bill?
The range of non-commodity costs included within business energy bills can be confusing. The wholesale cost of electricity or gas gets the most attention when contracts are being negotiated, but it's only part of the overall amount businesses pay.
Depending on your supply and contract structure, additional costs can include network charges, system costs, environmental and policy-related charges, and other regulated or supplier-applied costs. These charges can change over time, and some may be passed through to businesses separately rather than being included within a fixed unit rate.
It's important for businesses to understand which elements of their energy costs are fixed, which are variable, what is reconciled and how changes could affect future bills, particularly when preparing budgets or comparing contract options. Reconciliations can be unexpected, costly and complicated to calculate.
A competitive headline unit rate doesn't always mean that the overall cost will be the most suitable option for your business, which is why we recommend looking at the complete cost rather than focusing on one figure.
4. Could your electricity capacity charges be higher than necessary?
For businesses with larger electricity supplies, capacity charges are another area we recommend reviewing.
These charges can relate to the amount of electrical capacity reserved for a site, rather than simply the amount of electricity consumed. If your business has changed its operations, invested in more efficient equipment or reduced its electricity requirements, your agreed capacity may no longer reflect what you actually need. Equally, if capacity is set too low, you may face additional charges or operational constraints where demand exceeds the agreed level.
By reviewing agreed capacity alongside actual maximum demand, we can identify whether the current arrangements remain appropriate and whether there may be an opportunity to reduce unnecessary costs.
This doesn't apply to every business, but for those with larger or more complex electricity supplies, it's an important part of understanding the overall cost of energy.
5. Are you paying the correct taxes and levies?
Business energy invoices can include taxes and levies such as VAT and the Climate Change Levy (CCL), with the applicable treatment depending on the nature of the supply and the circumstances of the organisation.
Certain businesses may qualify for reduced rates or exemptions, but eligibility depends on specific criteria and, in some cases, the appropriate declarations being in place.
If these arrangements haven't been reviewed for some time, or your business has undergone operational changes, we recommend checking that the correct treatment is being applied. This is particularly relevant for organisations with multiple sites or different types of energy usage, where the applicable rates may not necessarily be the same across every supply.
Don't assume that an exemption or reduced rate applies automatically. Check whether your business is receiving any relief it is legitimately entitled to.
6. Are billing errors being carried forward without anyone noticing?
Not every billing issue is immediately obvious, and some can continue for months before they're identified.
A supplier may issue a correction, apply an adjustment or carry forward a balance from a previous period, but unless these changes are properly reconciled, it can be difficult to establish whether the account is accurate.
For businesses managing several energy accounts, the administrative work involved in checking invoices, investigating discrepancies and following up with suppliers can be considerable. And, identifying an error is only the first part of the process, as resolving it and securing any necessary credit or refund can require ongoing communication with the supplier.
Having a consistent process for validating invoices and tracking outstanding queries helps prevent issues from being overlooked and gives businesses greater confidence in their financial reporting.
7. Could you be using more energy than you need to?
A sudden increase in consumption, equipment operating outside normal business hours or an unexpected change in usage patterns can all contribute to higher bills without immediately attracting attention.
Look at your consumption data over time, rather than simply comparing the total value of monthly invoices, because this can reveal trends and potential inefficiencies that might otherwise go unnoticed.
For example, you might discover that electricity demand remains unusually high overnight or that one site is consuming significantly more energy than another with similar operating requirements. There may be an explanation, but without access to accurate data and regular reporting, it's difficult to know whether an opportunity to reduce costs exists.
Understanding when and how energy is being used is just as important as understanding the rates being paid, because it gives businesses the information they need to make better decisions about future contracts, budgets and operational improvements.
A practical energy bill checklist for your business
Billing accuracy
Are our invoices based on actual meter readings or estimates?
Does the consumption being billed match our meter data?
Have we seen any unexpected increases or unusual adjustments?
Are there outstanding credits, refunds or billing disputes that need resolving?
Contracts and charges
Are the unit rates and standing charges consistent with our agreed contracts?
Do we understand all the additional charges included in our bills?
Are any non-commodity costs passed through separately, and have we accounted for potential changes?
Where applicable, is our agreed electricity capacity appropriate for our current requirements?
Taxes and compliance
Are the correct VAT and Climate Change Levy rates being applied?
Have we checked whether the business qualifies for any relevant reliefs or exemptions?
Are the necessary declarations and supporting records up to date?
Consumption and cost control
Are we regularly reviewing consumption trends rather than just invoice totals?
Can we identify unusual usage patterns or changes in demand?
Do we have sufficient visibility of energy costs across individual sites or business units?
Is someone responsible for checking invoices and following up with suppliers when something doesn't look right?
Taking control of your energy costs starts with understanding them
Energy bills have become increasingly complex, and with businesses already facing pressure on operating costs, it's important to know exactly what you're paying for.
While securing the right energy contract remains important, effective cost management doesn't stop once that contract has been signed, and regular invoice validation, consumption monitoring and supplier management are all essential to making sure you're not paying more than you should.
At Greenfields Energy Group, our Energy Bureau team carry out these checks on behalf of our clients, from validating invoices and reviewing charges to monitoring consumption, identifying discrepancies and working directly with suppliers to resolve issues.
And these checks can make a real financial difference, as we demonstrated when our Bureau team uncovered energy overcharges for a client.
If you're not confident that your energy bills are accurate, or simply want the reassurance that someone is keeping a close eye on your energy costs, get in touch with our team to find out how we can help.
Lindsay Williams | Head of Energy Bureau, Greenfields Energy Group
Email: Lindsay@greenfieldsenergygroup.co.uk
Call: 01384906204