Business Energy Comparison UK 2026: How to Compare, Switch & Save

By Andy Pickett · Managing Director

Published 17 April 2026 · About the author

Comparing business energy in the UK is a different game to comparing your home gas and electric. There is no Ofgem price cap, no public price-per-kWh table, and every quote is bespoke to your meter, postcode and usage profile. This guide explains how a business energy comparison actually works in 2026, what data you need, the three routes you can take (broker, comparison site or direct), and the practical playbook to make sure you end up on the lowest unit rate available for your business.

If you would rather just see your real numbers, get a free 60-second business energy quote — we run a live comparison across every UK supplier.

Why business energy comparison is different from domestic

Domestic energy comparison is simple because every household pays roughly the same wholesale rate, the same standing charge band, and the regulator caps the maximum unit rate. Business energy comparison has none of that.

• No price cap. The Ofgem default tariff cap does not apply to business contracts. Suppliers can quote whatever the market will bear.
• Bespoke pricing. Every business gets a unique quote based on consumption, peak demand, postcode, credit rating and contract length.
• Time-limited offers. Most quotes are valid for 24-72 hours because suppliers hedge wholesale on the day of quoting.
• Bigger spreads. Between cheapest and most expensive quotes for the same business, the gap can be 30-50% — a far wider spread than domestic.

What data you need before you compare

The cleaner the inputs, the better the quote. To run a proper business energy comparison, you need:

1. Your MPAN (electricity) — a 21-digit number on your bill. For gas, your MPRN is a 6-10 digit number. See our MPAN & MPRN guide.
2. Your annual consumption (kWh). Pull this from any bill or annual statement. If you do not know it, use the last 12 months of bills or your supplier’s online portal.
3. Your current supplier and end date. Drives whether suppliers will quote you now (within the 6-month renewal window) or only later.
4. Your postcode. Determines which Distribution Network Operator (DNO) you sit under, and therefore your DUoS charges.
5. A signed Letter of Authority (LOA). Lets the broker or new supplier pull historical usage data. Without it, you only get rough estimates. See our LOA guide.

The three ways to compare business energy

Option 1: Use a business energy broker

Brokers have live API access to most or all UK business suppliers and can pull dozens of quotes in one go. They earn a fee that is added to the unit rate — typically 0.1-0.5p/kWh for SMEs, lower for larger users. The good ones disclose their fee transparently. Brokers are usually the right choice for businesses using over 5,000 kWh/year. Read our do you need a business energy broker guide.

Option 2: Use a business energy comparison site

Comparison sites work like brokers under the hood — they pull supplier quotes via API and display the cheapest. The difference is that comparison sites are usually self-service (no account manager) and quote a smaller pool of suppliers (the ones who pay the comparison site to be listed). Best for micro and small businesses (under 25,000 kWh/year) who want a quick number without a phone call.

Option 3: Go direct to suppliers

You phone or email each supplier and request a quote individually. Time-consuming and you will only get to the suppliers you already know about. Worth it for very large users (over 1 GWh/year) who run a formal procurement process. For everyone else, the brokers and comparison sites do this faster and cheaper. See our procurement guide.

Step-by-step: running your business energy comparison

1. Diary the renewal window 6 months before contract end. This is the earliest most suppliers will let you sign a new contract.
2. Pull a recent bill and confirm MPAN, MPRN (if dual fuel), supplier, current contract end date and last 12 months of usage in kWh.
3. Sign a Letter of Authority with your chosen broker or comparison platform.
4. Receive 4-12 quotes. Compare on total annual cost, not just unit rate — standing charge can swing the answer.
5. Decide your contract length. Longer fixes (3-5 years) are usually 1-3p/kWh cheaper than 12-month deals when wholesale is rising; shorter fixes win when wholesale is falling.
6. Sign the new contract. The new supplier handles the change-of-supplier process; takes 21 days.
7. Check your first invoice against the contract terms. Roughly 15% of new contracts are billed incorrectly in month 1.

What to compare beyond the unit rate

The headline unit rate is what most comparison tools highlight, but the cheapest unit rate is not always the cheapest contract overall. Compare:

• Standing charge. A 60p/day standing charge adds £219/year before you use a single kWh. On a 5,000 kWh/year shop, a low-standing-charge tariff can beat a low-unit-rate tariff. See our no-standing-charge tariffs guide.
• Exit fees / early termination charges. Most fixed contracts charge the remaining unit rate × remaining usage if you exit. Check the small print.
• Renewable backing. If you need REGO-backed renewable electricity for ESG reporting, filter for it — the premium is usually negligible in 2026.
• Payment terms. Direct debit is usually 1-2% cheaper than BACS or invoice. Some suppliers offer paperless billing discounts.
• Supplier credit rating. Cheaper suppliers occasionally fail (think Bulb, People’s Energy). Stick with rated suppliers for sites you cannot afford to have transferred to a Supplier of Last Resort.

Common comparison mistakes (and how to avoid them)

Comparing the wrong consumption band

If you under-state your kWh in a comparison tool you will get a low unit rate quoted, then the supplier will re-rate you upwards once they see your actual consumption from the LOA. Always use real 12-month data.

Forgetting standing charge in the headline number

Comparison sites often rank purely on unit rate. For low-volume sites the standing charge dominates — sort by total annual cost instead.

Signing the first quote you see

Quote spreads of 30-50% between suppliers are normal. Get at least 4-6 quotes before signing.

Missing the renewal window

Outside the 6-month window suppliers either decline to quote or quote at non-competitive rates. Rolling onto out-of-contract while you “shop around” can cost more than the savings you find.

Not comparing dual fuel separately

“Dual fuel” discounts are mostly marketing for businesses. Compare gas and electricity separately — the cheapest gas supplier is rarely the cheapest electricity supplier. Read our business electricity pillar and full suppliers comparison.

Comparison data sources we use in 2026

Connection Technologies’ comparison engine quotes the following suppliers in real time: British Gas Business, EDF Energy, E.ON Next, ScottishPower, OVO/SSE, Octopus Energy for Business, Opus Energy, Total Energies, Crown Gas & Power, SEFE Energy (Gazprom), Drax, Pozitive Energy, Yu Energy, Smartest Energy, Bryt Energy, Good Energy, Ecotricity, So Energy and a further 10+ specialist suppliers. We refresh the wholesale-linked components every 60 minutes during market hours.

Frequently Asked Questions

Ready to compare? Get a free 60-second business energy comparison, or call 0333 015 2615 to speak to a UK-based account manager. We quote every UK supplier so you only sign the cheapest deal for your meter.