How to compare business energy prices: a step by step process

Comparing business energy prices properly means more than looking at a single unit rate on a marketing email. It means gathering accurate consumption data, understanding your current contract position, tendering the whole market, and reading the contract terms as carefully as the price.

Start with your contract end date and termination notice window, both of which are on your current supplier's terms and usually on your latest bill or contract letter. Missing the notice window is the single most common reason businesses end up on expensive out-of-contract rates, so this step comes first, not last.

Next, gather twelve months of consumption data if you can. Your supplier can usually provide this on request, or it may already appear on your online account. Suppliers price more competitively when they can see a full annual pattern rather than a single estimated bill, because it removes uncertainty from their side of the deal.

Confirm your meter details: the MPAN (Meter Point Administration Number) for electricity or MPRN (Meter Point Reference Number) for gas, along with whether you are on a half-hourly or non half-hourly meter. These identify your exact supply point and are needed for any accurate quote.

With data in hand, decide what contract length you are open to. One, two and three-year fixed terms each carry a different risk and reward balance, and it is worth asking for quotes across more than one term length so you can compare the total cost of each option side by side.

Submit the same consumption data to multiple suppliers, or use a comparison service that does this for you in one submission. Comparing quotes gathered at different times, even a few days apart, is not a fair comparison because wholesale prices move daily.

When quotes come back, convert each one into an estimated annual cost using your actual consumption, rather than comparing unit rates alone. A lower unit rate with a higher standing charge can end up more expensive for a low-usage site, and the only way to spot that is by doing the full calculation.

Worked example: Supplier A quotes 27p per kWh with a 40p daily standing charge. Supplier B quotes 25p per kWh with a 65p daily standing charge. On 10,000 kWh a year, Supplier A costs £2,700 plus £146 standing charge, totalling £2,846. Supplier B costs £2,500 plus £237.25 standing charge, totalling £2,737.25. Supplier B is cheaper here despite the higher standing charge, but the gap narrows sharply at lower consumption and could reverse below a few thousand kWh.

Check contract terms beyond price: the termination notice period for the new contract, whether the rate is genuinely fixed or has pass-through clauses that allow non-commodity costs to change during the term, billing frequency, and any renewal or rollover terms that would apply automatically if you do not act at the next end date.

Look at the supplier's reputation for billing accuracy and customer service, not just price. A cheaper contract that generates constant billing disputes can cost more in staff time than it saves in unit rate.

Once you have chosen a supplier, confirm the start date aligns with your current contract's end date to avoid a gap that would default you to deemed rates, and get the agreement in writing before your current termination window closes.

Finally, calendar your new contract's end date and notice period the moment the deal is signed. The best time to start planning your next renewal is the day the current one begins, which is exactly the discipline that keeps businesses off expensive rollover terms.

A useful discipline is to keep a simple renewal folder, physical or digital, containing your last three bills, your MPAN and MPRN, your contract paperwork and the notice window date, updated every time you switch or renew. Businesses that do this consistently spend a fraction of the time on each subsequent comparison, because the groundwork of gathering data, usually the slowest part of the process, is already done.

It is also worth asking any comparison service or broker directly how many suppliers they actually approach on your behalf, since some platforms only display a limited panel of partner suppliers rather than genuinely tendering the whole market. The answer to that single question often explains why two comparison routes can produce noticeably different results for the same business.

For scale, think of consumption in rough bands rather than exact figures: a small shop or office commonly uses somewhere between 5,000 and 20,000 kWh of electricity a year, a mid-sized premises such as a café or small warehouse often runs to 20,000-75,000 kWh, and anything moving into the hundreds of thousands or millions of kWh usually means half-hourly settlement and a more bespoke pricing conversation with suppliers.

Regardless of which fuel or contract length you are comparing, the notice period written into your existing agreement is the deadline that actually matters, commonly somewhere between one and three months before the end date. Build your comparison timeline backwards from that date rather than from the contract end date itself, so you are never scrambling in the final fortnight.

Businesses that treat this comparison process as a one-off exercise rather than a recurring habit tend to drift back onto uncompetitive rates within a couple of renewal cycles, simply because market conditions move on even when nothing about the business itself has changed. Repeating the same disciplined steps at every renewal is what keeps the saving in place long term.