Commercial lease documents are dense with terminology that rarely appears anywhere else in day-to-day business life. Understanding what these terms actually mean, and why each one matters, makes the difference between a tenant who can negotiate effectively and one who simply signs whatever is presented to them.
This is a spoke in our commercial property cluster. For the full negotiation process these terms fit into, see our pillar guide on how to negotiate a commercial lease for a small business.
Heads of Terms
A document prepared early in a lease transaction that summarises the key commercial terms both parties have agreed to, before formal legal drafting begins. This is not legally binding in most cases, but it forms the basis the final lease will be drafted around, making it a critical point to get right rather than treating as a formality.
Full Repairing and Insuring (FRI)
A lease structure where the tenant is responsible for the full cost of repairing and insuring the property, regardless of its condition when the lease began. This is common in UK commercial leases and represents a significant potential liability, which is why a schedule of condition, discussed below, is such an important protection.
Schedule of Condition
A detailed record, often including photographs, of the property’s condition at the start of the lease. Attaching this to the lease limits the tenant’s repair obligation to genuine deterioration during the tenancy, rather than being liable for pre-existing issues that existed before the lease began.
Break Clause
A provision allowing either party, or sometimes only the tenant, to terminate the lease early at a specified point, subject to agreed conditions and notice periods. Break clauses are often interpreted narrowly by courts, meaning even a minor procedural error when exercising one can invalidate it, so understanding the exact conditions attached is essential.
Rent Review
A clause setting out how and when rent will be reassessed during the lease term, commonly every three or five years. Reviews may be open market, meaning rent is reset to current market rates, or index-linked, meaning it tracks a specified inflation measure, often with an agreed cap.
Alienation
The set of rights governing whether a tenant can assign the lease to another party, sublet all or part of the space, or share occupation with another business. Landlord consent is typically required, though a well-negotiated lease will state that such consent cannot be unreasonably withheld or delayed.
Service Charge
A cost charged to tenants, often in a shared building, covering the maintenance of common areas, building insurance, and shared services. Service charges can vary significantly year to year, and reviewing the historical trend before signing gives a more realistic picture of total occupation cost than the headline rent alone.
Permitted Use
The specific use class the lease permits the property to be used for. Operating outside the permitted use, even inadvertently as a business evolves, can breach the lease terms, making it important to negotiate reasonably broad permitted use where possible.
Dilapidations
The condition a tenant is required to return the property to at the end of the lease, often requiring restoration to its original state including removal of any alterations made during occupation. Dilapidations claims at the end of a tenancy can be a significant and sometimes unexpected cost if not properly understood from the outset.
Personal Guarantee
A commitment, often required from a company director for a new or smaller business, making that individual personally liable for the lease obligations if the business itself cannot meet them. Negotiating the scope and duration of a personal guarantee, such as limiting it to a set number of years, reduces personal financial exposure.
Quick Reference Glossary
| Term | Plain English Meaning |
|---|---|
| Heads of Terms | Early summary of agreed key terms |
| FRI | Tenant pays for all repairs and insurance |
| Break Clause | Right to end the lease early under agreed conditions |
| Alienation | Rights to sublet, assign, or share the space |
| Dilapidations | Obligation to restore the property at lease end |
Frequently Asked Questions
Is a schedule of condition always included in a commercial lease?
No, it is not automatic and must usually be requested and negotiated by the tenant. Given the protection it offers against unfair dilapidations claims, it is worth requesting even when a landlord does not propose it initially.
What is the difference between a break clause and a lease ending naturally?
A break clause allows termination before the full contractual term ends, subject to specific conditions, while a lease ending naturally simply means the agreed term has run its full course without early termination.
Are all commercial leases full repairing and insuring?
No, though FRI terms are common in the UK, particularly for standalone units. Leases in shared buildings sometimes split responsibility differently, with the landlord retaining responsibility for structural repairs while the tenant covers internal maintenance.
Why does a personal guarantee matter for a small business owner?
A personal guarantee extends liability beyond the limited company structure to the individual director, meaning personal assets could be at risk if the business cannot meet its lease obligations, which is why negotiating its scope matters significantly for small business owners.
About the author: The Business To World editorial team covers practical business, banking, investment and property guidance for UK small business owners and entrepreneurs.