UK businesses are losing money on energy every single month, and most of them do not realise it. With commercial energy costs making up a significant portion of operating overhead for SMEs, the decision to simply renew with an existing supplier rather than compare the market can translate into thousands of pounds in unnecessary annual spend. Understanding how business energy contracts work, and what options exist for switching or renegotiating, is one of the most practical steps any business owner can take to improve their financial position.
The Problem With Loyalty in the Energy Market
The assumption that sticking with a known supplier rewards a business with better rates is largely a myth. In practice, UK energy suppliers routinely roll out-of-contract businesses onto deemed rates, which are among the highest rates available in the market. These are designed to provide continuity of supply, not value. Without active comparison and negotiation, a business that simply lets a contract expire is very likely to end up paying significantly more than a competitor that shops around.
Commercial energy contracts differ from domestic ones in several important ways. Businesses are typically offered fixed-term agreements of one to five years, and the renewal window matters enormously. Most suppliers require written notice of intent to switch or renegotiate somewhere between 30 and 90 days before the contract end date. If that window is missed, the contract can roll over automatically. Many businesses have been caught out this way and spent a year or more on unfavourable rates before being able to change anything.
Using an Independent Energy Broker
Rather than spending time contacting individual suppliers directly, many businesses are now working with independent energy brokers who handle the comparison process on their behalf. A broker with established relationships across the major UK suppliers can quickly retrieve multiple quotes and present a clear picture of what the market currently offers for a given consumption profile.
One example is Green Light Consultancy Group, a UK independent energy broker with 5-star Google reviews that compares business gas and electricity deals across leading suppliers including British Gas, E.ON, EDF, Scottish Power, SSE, and TotalEnergies. Because they are independent, their recommendation reflects what is genuinely competitive at the time rather than what a single supplier wants to sell.
For most SMEs, the process involves providing current bills, contract end dates, and MPAN or MPRN reference numbers. From that starting point, a broker can return quotes relatively quickly, giving the business owner a real basis for comparison rather than a single take-it-or-leave-it renewal offer.
Fixed vs. Variable: Choosing the Right Contract Type
One practical decision businesses face at the comparison stage is whether to opt for a fixed-rate or variable-rate contract. Fixed-rate contracts lock in a unit rate for the duration of the term, making energy costs predictable and easier to budget for. This is the option most SMEs prefer, particularly during periods of market uncertainty. Variable contracts can offer lower rates when wholesale prices fall, but they also expose the business to upward movements, which is a risk many owners are not well-positioned to absorb.
Understanding which structure fits the business’s financial situation is part of what a good broker conversation covers. There is no universal answer, but having the right guidance means the decision is at least informed rather than defaulted to.
When to Start the Process
Most businesses that engage with energy comparison leave it too late. Starting the process three to six months before a contract end date gives the fullest range of options and the most leverage. The further out you begin, the more supplier competition works in your favour.
If a contract has already rolled over and the business is already sitting on an out-of-contract rate, switching is still worth pursuing. In many cases, savings from a new contracted rate can offset any short-term switching friction relatively quickly.
Taking energy costs seriously is not the most exciting task on a business owner’s list. But it is one where a small investment of time can produce a meaningful and recurring financial return, year after year.
FAQ
Does switching business energy suppliers interrupt supply? No. The physical delivery of gas and electricity to your premises does not change when you switch suppliers. Only the billing arrangement changes, and the transition is managed between the outgoing and incoming suppliers.
How much notice does a business need to give before switching? Most commercial energy contracts require between 30 and 90 days’ written notice before the end date. Always check the specific terms of your contract, as missing the notice window can trigger an automatic rollover.
What information do I need to get an energy comparison? You will typically need your current energy bills (which show your MPAN or MPRN reference numbers), your annual consumption figures, and your current contract end date. A broker can work with this to return accurate quotes.
Is it worth switching if I only have a few months left on my contract? Yes, though the timing affects your options. It is worth starting the comparison process as early as possible. If you are close to your end date, your broker can prepare a new contract ready to activate once the current one expires.
Can a broker negotiate better rates than I could get directly? In many cases, yes. Brokers have established commercial relationships with suppliers and a clear picture of what the market is offering at any given time. They are also well positioned to identify contract terms that might not be obvious on a standard quote, such as exit fees or consumption thresholds.
