Can a landlord’s invoice affect whether a tenant has broken its lease?

High Court considers payment conditions in Sterling House Ltd v International Baccalaureate Organisation (UK) Ltd [2026] EWHC 2680 (BP)

A tenant break clause may require strict compliance with its conditions. But in Sterling House Ltd v International Baccalaureate Organisation (UK) Ltd, the High Court considered whether a landlord could rely on unpaid sums after its agents had invoiced the tenant for a lower amount and the tenant had paid it in preparation for leaving.

The court held that the landlord was prevented from relying on the shortfall in the quarterly rent. It also found that the tenant had not been given a reasonable opportunity to pay the insurance rent demanded shortly before the break date. The decision is a reminder that the parties’ communications and conduct can matter when a dispute arises about whether a break condition has been met.

What happened?

The tenant’s lease included a break date of 23 February 2026. To bring the lease to an end on that date, the tenant had to pay the annual rent and any insurance rent due under the lease. The annual rent was payable quarterly in advance; insurance rent was payable on demand. The lease provided that outstanding sums would prevent the break from taking effect.

In early February, the tenant’s facilities manager asked the landlord’s agents for invoices so that the sums due could be paid before the tenant handed back the premises. After a follow-up request, the agents sent an invoice for rent covering the period from 22 December 2025 to 23 February 2026. The tenant paid that invoice on 13 February. The payment did not include the balance of the quarter’s rent, which was approximately £45,000.00.

On Friday 20 February, the landlord emailed an insurance rent demand to an address in Singapore. That did not amount to valid service. The landlord also delivered the demand to the tenant’s registered office at 3pm that day. The tenant paid the insurance rent by faster payment on 25 February, after the break date. The landlord argued that the tenant had not met the lease conditions and that the break was therefore ineffective.

What did the court decide?

The landlord’s claim was dismissed. The court found that the landlord was estopped from relying on the unpaid balance of the quarterly rent.

The agents’ standard email referred to payment “as per the terms of your lease”. In context, the judge considered that this was a reminder about when payment should be made. The invoice itself specified the amount and the period for which rent was charged. The tenant had asked for the invoice in good time because it wanted to pay the sums needed before handover, and it was reasonable for the tenant to rely on the figure supplied by the landlord’s agents.

The court also held that the estoppel applied to the insurance rent. Although the tenant’s original request referred to rent and service charge, the judge considered the wider context to be a request for the sums needed to complete the handover and bring the lease to an end. A demand delivered at 3pm on the Friday before the Monday break date did not give the tenant a reasonable time to respond.

There was a further point. Even if the estoppel did not apply to the insurance rent, the tenant was not in default until it had a reasonable opportunity to make the payment using the necessary payment arrangements. On the evidence, that opportunity extended to when the tenant made payment on 25 February. The court therefore did not need to decide whether an existing credit balance could itself be treated as payment of the insurance rent.

Why is the decision important?

The judgment does not displace the strict approach to break clauses. In Marks & Spencer plc v BNP Paribas Securities Services Trust Co (Jersey) Ltd [2015] UKSC 72, the Supreme Court confirmed that clear wording is required if rent is to be apportioned to a break date. A tenant should not assume that rent will be reduced automatically because it is leaving part-way through a rental period.

Instead, Sterling House shows how a landlord’s own communications may affect its ability to insist on strict compliance in a particular case. The court applied the principles of estoppel, including those considered in PCE Investors Ltd v Cancer Research UK [2012] EWHC 844 (Ch). The outcome depended on the tenant’s clear request, the invoice issued in response, the tenant’s reasonable reliance on it and the timing of the insurance rent demand.

Practical points for landlords and tenants

Landlords and managing agents should check that any invoice issued before a break date reflects the sums payable under the lease. If an invoice is only an interim calculation or does not include all sums that must be paid for the break to take effect, that should be made clear. Demands for insurance rent and other on-demand sums should be issued early enough to allow a reasonable time for payment.

Tenants should review the break clause and rent provisions well before serving or relying on a break notice. They should request a written statement of all sums said to be due, keep the relevant correspondence and allow time to resolve any differences.

Where the lease requires payment of a full quarter’s rent, paying only to the break date carries a real risk unless the lease or a clear agreement provides otherwise.

Conclusion

Sterling House is a useful reminder that a landlord may be prevented from relying on a payment shortfall where its own invoice has reasonably led the tenant to believe that the invoiced amount is what must be paid. It also confirms that a tenant must have a reasonable opportunity to make an on-demand payment before being treated as in default.

The decision is fact-specific. The safest course for either party is to address payment conditions early and make sure that the sums required by the lease are clear well before the break date.

Contact KTS Legal

If you are a commercial landlord or tenant dealing with a break clause or a dispute about lease payments, KTS Legal can advise on your position and the steps available to protect it.

Telephone: 020 8367 0505
Email: info@ktslegal.com