Handing Back the Keys: Managing Energy Liabilities When a Site Goes Dark

When a UK business vacates, downsizes or sublets part of its estate, the lease is rarely the only agreement that needs attention. Energy contracts have their own clocks, their own notice windows and their own financial consequences when a site falls silent. The empty unit is not a neutral space: it continues to attract standing charges, capacity charges and, in the worst cases, deemed-rate pricing until the supply is formally transferred or terminated.

For finance and facilities teams, the cost of getting this wrong is rarely dramatic in a single month. It accumulates quietly: a final invoice that includes estimated readings, a supplier that continues to bill after the keys are handed back, or a landlord who assumes the outgoing tenant has closed the account when no one has confirmed it in writing. The following framework is designed to keep those costs out of the next financial year.

Align the contract end date with the lease end date

The first task is to establish which date governs the exit. Most business energy contracts specify a fixed term and a notice period, often between 30 and 90 days, that must be served in writing before the term ends. The notice window is frequently narrower than the lease negotiation allows for. A lease break clause may give three months’ flexibility; the energy contract may require notice six months before renewal.

Retrieve the contract schedule and identify three dates: the contract end date, the last date on which notice can be served, and any early-termination charge that applies if the site closes before the term expires. If the lease ends before the contract term, the business remains liable for the supply unless it can transfer the agreement or negotiate an exit. In some cases, the early-termination charge is less costly than carrying the site through to renewal; in others, it is not. The calculation should be done before the move, not after the final invoice arrives.

Assignment and novation: passing the liability to the next occupier

Where a new tenant or buyer is taking over the premises, novation is often the cleanest route. Novation transfers the contract — including its terms, rates and remaining term — from the outgoing business to the incoming occupier, subject to the supplier’s consent and credit checks. Assignment is a narrower mechanism and is less commonly available in standard business energy terms, but it is worth asking about if the supplier’s contract permits it.

Start the conversation early. Suppliers can take weeks to process a novation, and they are not obliged to agree if the incoming party fails a credit assessment. For subletting arrangements, the outgoing tenant may remain the named account holder even though the subtenant consumes the energy. In that case, the lease should set out how energy is recharged, how readings are taken and who bears the risk of a supplier default. Without those terms, the landlord or head tenant can end up absorbing costs that belong to someone else.

Treat the final meter reading as evidence

A final meter reading is not a formality; it is the boundary between two financial responsibilities. Arrange for the reading to be taken on the last day of occupation, photograph the meter and submit the reading to the supplier with the closing date in writing. For half-hourly electricity sites, the MPAN data should support the reading, but the supplier still needs a formal notification to close the account.

Keep proof of submission. If the supplier later issues an estimated invoice that covers a period after the site was vacated, the reading and the written notice are the evidence needed to challenge it. For gas sites, the Meter Point Reference Number should be quoted in all correspondence. The aim is to create a clear audit trail that shows when consumption ended, who was responsible and what was agreed.

Deemed rates and the ghost site

A site does not need to be occupied to consume money. If the account remains open and no new occupant registers, the supplier may move the supply onto deemed-rate terms once the contract ends. Deemed rates are typically higher than negotiated contract rates and can be applied retrospectively in some circumstances. Standing charges continue regardless of consumption, and capacity charges may still apply at half-hourly sites.

This is the ghost-site problem: the business has left, but the supply has not been transferred or terminated. The risk is greatest where the landlord or managing agent assumes the tenant has dealt with the account, and the tenant assumes the landlord has done so. Confirm in writing which party is responsible for the supply after the exit date. If the landlord is taking over, ask for the supplier’s confirmation that the account has been transferred. If the site is to be vacant for a period, ask the supplier what deemed-rate terms will apply and whether a temporary out-of-contract arrangement can be agreed.

The landlord’s role and the limits of reliance

Lease obligations vary. Some leases require the tenant to notify the landlord of the energy supplier and the account number before vacating; others place the responsibility for disconnection on the landlord. Do not rely on a verbal assurance. Put the exit arrangements in writing and copy the relevant parties: landlord, managing agent, supplier and, where applicable, the incoming tenant.

For businesses that sublet, the head lease may make the tenant responsible for the supply even after the subtenant has left. Recharging energy to a subtenant requires accurate metering and a clear billing basis; if the subtenant vacates without settling, the head tenant may still owe the supplier. The time to resolve that is before the sublease ends, not after the final reconciliation.

A pre-exit checklist for finance and facilities

• Review the energy contract for end date, notice period, early-termination charges and renewal terms.
• Diarise the last date for serving notice and send it in writing, with proof of delivery.
• Confirm the final day of occupation and arrange a meter reading with a photograph.
• Ask the supplier whether novation or assignment is possible and start the process early.
• Notify the landlord and managing agent in writing of the account closure and the final reading.
• Check the final invoice against the reading and query estimated charges promptly.
• Keep records of all correspondence for at least the duration of the contract’s dispute window.
• For multi-site portfolios, check whether the vacated site sits within a group contract and whether closing it triggers any portfolio-level adjustment.

Exit is a project, not an email

The most expensive energy contract is often the one nobody remembers to close. A site that is empty but still billed is a cost-management failure that surfaces months later, usually during an audit or a budget review. The remedy is procedural: align the lease and contract dates, use novation where it is available, treat the final reading as evidence and confirm the closure in writing. None of that requires a specialist adviser, but it does require someone to own the exit before the keys are handed back.