7 Mistakes You're Making with Business Energy Contracts (and How to Fix Them Before April 2026)

If you're like most UK business owners, you probably dread dealing with business energy contracts. The paperwork, the jargon, the worry you’re overpaying — it’s easy to delay. But with April 2026 coming, waiting could cost your SME thousands.

Here are the 7 most common mistakes UK SMEs make with commercial energy contracts — and how you can fix them now.

Mistake #1: Missing Your Notice Period

Missing your supplier’s notice period means you’re usually rolled onto rates 50–70% higher than the market. Find your contract’s notice clause now, and set calendar reminders for 120, 90 and 60 days before the end date.

Mistake #2: Ignoring Renewal Letters

Renewal emails often contain your switching window and key dates. Set up a filter in your inbox and a shared folder/forwarding rule so nothing is missed.

Mistake #3: Incorrect Meter Details

Switches can fail if your MPAN/MPRN or supply address is even slightly wrong. Always use your latest bill for details and double-check before making changes.

Mistake #4: Only Focusing on Unit Rates

Total cost matters more than the unit rate. Compare annualised cost on real usage, standing charges, and look out for pass-throughs and hidden clauses.

Mistake #5: Leaving It Too Late

Don’t wait until the last minute! Start reviewing 4–6 months before your contract ends, get quotes early, and allow time to negotiate.

Mistake #6: Not Factoring in Business Changes

Energy use often changes with new equipment, longer hours, or workspace growth. Provide up-to-date usage data when seeking quotes.

Mistake #7: Accepting the First Renewal Quote

Your current supplier’s offer is rarely the best. Always get quotes from at least 3–4 suppliers or use a commercial energy broker to compare the whole market.

Your 2026 Action Plan:

• This month: Find your contract, check notice period, verify meter numbers.

• Next month: Review operational changes, get whole-market quotes.

• Before April: Compare total costs, choose your new supplier, and double-check all paperwork.

Want support reviewing your next contract? Speak to a commercial energy broker. Get in touch with M&O Business Solutions. We compare suppliers, negotiate terms and manage your switch so you don’t have to.