Moving Business Premises? Here’s What You Need to Know About Energy Change of Tenancy (CoT)

Moving your business involves many tasks, and one key step is updating your energy supply. Whether you’re leaving your current site or moving into a new one, informing your energy supplier helps avoid unexpected charges or contract issues. This process, called Change of Tenancy (CoT), links your business to the correct energy account.

When to Notify Your Supplier

You should notify your supplier if you move into new premises, leave your current site, or there’s a change in legal occupancy or leaseholder. This ensures the right party is billed and helps avoid costly default or deemed rates. There are two types of CoT: incoming, when you take over supply at a new site, and outgoing, when you confirm you’re no longer responsible for a property. Completing these early helps ensure a smooth transition.

Updated CoT Rules from June 2025

Ofgem’s new rules require suppliers to process CoT requests within 10 working days. They must open or close accounts, request extra documents if needed, or reject requests with an explanation. These rules apply whether you stay with your current supplier or switch.

Managing the Move

If you keep the same supplier, you still need to provide final meter readings for your old premises, start readings for the new site, and tenancy documents to ensure accurate billing. When changing suppliers, both your current and new providers must be informed. The incoming supplier usually manages the switch, but you’ll need to provide documentation and meter readings to both.

On moving out, submit a final meter reading on your move-out day, inform your supplier of the exact date, and provide MPAN and MPRN numbers if requested. Sharing landlord or new tenant details helps suppliers set up the next account correctly.

Why Proper Notification Matters

Failing to update suppliers can lead to charges after you’ve left, higher out-of-contract rates, billing errors, or disputes. A timely CoT helps avoid these problems. Some requests may be flagged as “high-risk” if there’s an outstanding balance, a recent contract, or multiple tenancy changes, and additional documentation may be needed.

If you face delays, unexpected charges, or unfair rejections, you or your broker can complain directly to the supplier. It is also reasonable to challenge unnecessary document requests.

Moving is busy enough without energy supply confusion. Manage your Change of Tenancy early, provide the right information, and meet deadlines to avoid extra costs. Need help with your energy move? Contact our team to guide you every step of the way.