Incorrect Business Energy Bill

Receiving a business energy bill that appears higher than expected, or that contains figures you do not recognise, is a concern that many commercial customers raise. Before concluding that a bill contains an error, it is worth working through a structured review of the charges it includes and the information used to calculate them.

Not every bill that appears unusual will turn out to contain a mistake. In many cases, a thorough review reveals that the bill is correct but reflects factors that were not immediately apparent — such as a period of higher consumption, a change in contract rates, or the inclusion of charges that were not present in previous bills. In other cases, a review does identify a genuine discrepancy that warrants further investigation with the supplier.

This guide covers the main components of a commercial energy bill and the specific areas to check when a bill appears incorrect. It also sets out the information you should gather before contacting your supplier, which will help to make that conversation more productive.

The starting point for any billing investigation is the meter readings used to calculate the bill. Your invoice should show an opening reading and a closing reading for the billing period, along with an indication of whether each reading is actual or estimated. The difference between the two readings represents the consumption on which the bill is based.

Check the readings shown on the bill against the readings on your meter. If the closing reading on the bill is higher than the current reading on your meter, this may indicate that the bill has been calculated using an estimated reading that overstates your actual consumption. If the opening reading on the bill is lower than the closing reading from your previous bill, there may be an overlap in the billing periods.

It is also worth checking that the meter readings relate to the correct meter. Commercial premises sometimes have multiple meters, and it is possible for readings to be attributed to the wrong supply point. Confirm that the MPAN or MPRN shown on the bill matches the supply point you are querying.

If you believe the meter readings are incorrect, take an actual reading from your meter and note the date and time. Submit this reading to your supplier and ask them to recalculate the bill using the actual figure. Keep a record of the reading you submitted and the date on which you submitted it.

When a supplier does not have an actual meter reading for a billing period, they will estimate consumption based on historical usage data and assumptions about your business. Estimated bills are typically marked with an 'E' or the word 'Estimated' next to the relevant reading on the invoice.

Estimated readings can result in bills that are either higher or lower than your actual consumption. If a series of estimated bills has understated your usage, a subsequent bill based on an actual reading will include a catch-up element that may make it appear significantly higher than usual. This is not necessarily an error — it reflects the accumulated difference between estimated and actual consumption over the preceding period.

If your bill is based on an estimated reading and you believe the estimate is materially different from your actual consumption, submit an actual reading and ask your supplier to issue a revised bill. Submitting regular meter readings is the most reliable way to avoid the accumulation of estimated bills and the catch-up charges that can follow.

Smart meters and half-hourly meters transmit consumption data to the supplier automatically, which reduces the likelihood of estimated bills. If you have a traditional meter and are regularly receiving estimated bills, it may be worth discussing with your supplier whether a smart meter installation is available for your premises.

The unit rate applied to your consumption is one of the most important figures on your energy bill. Check that the unit rate shown on the bill matches the rate set out in your contract documentation. If the rates differ, note the discrepancy and raise it with your supplier, providing a copy of the relevant section of your contract.

If your fixed-term contract has ended and you have not agreed a new one, you may have moved onto an out-of-contract or deemed rate, which is typically higher than a contracted rate. Check your contract end date and confirm with your supplier whether the rates on your current bill reflect a contracted rate or an out-of-contract rate.

Some commercial energy contracts include pass-through elements — charges that are passed on to the customer at cost and can vary during the contract term. Distribution use of system charges, transmission network use of system charges, and other network charges may change during a contract period, and these changes will be reflected in your bills even within a fixed-term agreement. Check your contract documentation to understand which elements are fixed and which are subject to variation.

If you have recently renewed your contract or switched supplier, confirm that the rates on the bill correspond to the new agreement rather than the previous one. Billing systems do not always update immediately at the point of contract change, and it is not uncommon for a bill to be issued at the old rate for a period after a new contract has taken effect.

The standing charge is a fixed daily charge that covers the cost of maintaining your connection to the energy network. It is charged for every day of the billing period, regardless of how much energy you consume. Check that the standing charge on your bill matches the figure in your contract documentation.

Standing charges can change at contract renewal, and the figure on your current bill may differ from what you were paying under a previous agreement. If your standing charge has increased, this will contribute to a higher bill even if your consumption has remained the same. Confirm whether the change reflects a new contract rate or a potential billing error.

For businesses with multiple supply points, standing charges are applied to each meter separately. If a previously inactive meter has been reactivated, or if a new supply point has been added to your account, this will introduce additional standing charges that were not present in previous bills. Check that the number of supply points on your bill corresponds to the number of active meters at your premises.

Business energy is generally subject to the standard rate of VAT. However, businesses that use energy predominantly for domestic purposes, or that are eligible charities, may be entitled to the reduced rate of 5%. If you believe you may be eligible for the reduced rate, contact your supplier and provide the relevant evidence — your supplier can advise on the documentation required.

Check that the VAT rate shown on your bill corresponds to the rate that should apply to your business. If the standard rate has been applied when you believe the reduced rate should apply, raise this with your supplier. Note that VAT rates are set by HMRC and any query about your eligibility for a particular rate is ultimately a matter for HMRC rather than your energy supplier.

Also check that VAT has been calculated on the correct pre-VAT total. If there are errors in the underlying charges — for example, an incorrect unit rate or an overstated consumption figure — the VAT amount will also be incorrect as a consequence. Resolving the underlying charge discrepancy should result in a corresponding correction to the VAT amount.

The Climate Change Levy (CCL) is a government environmental tax charged on energy used by businesses. It applies to electricity and gas and is charged at rates set by the government. CCL typically appears as a separate line item on commercial energy bills, calculated by multiplying your consumption by the applicable CCL rate.

Check that the CCL rate applied on your bill corresponds to the current government rate for the relevant fuel type. CCL rates are updated periodically, and a bill covering a period that spans a rate change may include CCL at more than one rate. If you are unsure of the current rates, they are published by HMRC.

Businesses that hold a valid Climate Change Agreement (CCA) with the Environment Agency may be eligible for a reduced rate of CCL on their energy use. If your business holds a CCA and the full rate of CCL has been applied, raise this with your supplier and provide evidence of your CCA status. This page does not constitute tax advice — if you have specific questions about your CCL liability, you should seek independent advice.

The MPAN is the unique reference number that identifies your electricity supply point. It is a 21-digit number that appears on your electricity bill and on the meter itself. Every electricity supply point in Great Britain has a unique MPAN, and it is used by suppliers, network operators and other parties to identify the specific connection being billed.

When reviewing a bill, confirm that the MPAN shown on the invoice matches the MPAN for the supply point you are querying. If you have multiple electricity supply points, it is possible for consumption data or billing information to be attributed to the wrong MPAN. A mismatch between the MPAN on the bill and the MPAN on your meter is a significant discrepancy that should be raised with your supplier promptly.

The MPAN also encodes information about the distribution network operator (DNO) responsible for your area and the profile class of your meter, which affects how your consumption is settled in the wholesale market. If you are unsure of your MPAN, it will appear on any previous electricity bill or can be obtained from your current supplier.

The MPRN is the unique reference number that identifies your gas supply point. It is typically a 6 to 10 digit number that appears on your gas bill. Like the MPAN for electricity, the MPRN is used to identify the specific gas connection being billed and to ensure that consumption data is attributed to the correct supply point.

Check that the MPRN on your gas bill matches the MPRN for your premises. If you are unsure of your MPRN, it will appear on a previous gas bill or can be found using the Find My Supplier service operated by Xoserve, the central data service provider for the UK gas market.

As with the MPAN, a mismatch between the MPRN on a bill and the MPRN for your premises is a significant issue. If you believe your gas consumption has been attributed to the wrong supply point, contact your supplier immediately and provide the correct MPRN.

For larger commercial electricity customers, particularly those with half-hourly meters, capacity charges can form a significant part of the total bill. These charges relate to the amount of electricity capacity you have reserved on the network — your agreed supply capacity — rather than the amount you actually consume.

Check that the agreed supply capacity shown on your bill matches the figure in your connection agreement or contract documentation. If your agreed capacity has been recorded incorrectly, you may be paying for more capacity than you have actually reserved. Conversely, if your actual demand regularly exceeds your agreed capacity, you may be incurring excess capacity charges.

Maximum demand charges are calculated based on the highest level of electricity demand recorded during the billing period, typically measured over a 30-minute interval. A single period of unusually high demand can result in a higher maximum demand charge for the entire billing period. If a maximum demand charge appears unexpectedly high, review your half-hourly consumption data for the period to identify whether there was a genuine peak in demand.