Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice.
Updated June 2026 · England & Wales
When a commercial landlord lets a property to a company or individual tenant, the financial risk of that tenant falling behind on rent or breaching the lease is a real concern. A guarantor agreement brings a third party into the picture, someone who agrees to step in and cover the tenant's obligations if things go wrong.
In my experience working with commercial landlords and tenants across England and Wales, these agreements are one of the most misunderstood parts of a commercial letting. Tenants often sign them without appreciating the long-term exposure, and landlords sometimes rely on boilerplate wording that does not quite do the job.
This page walks through what a guarantor agreement actually does, what it should contain, and the issues worth thinking about before signing.
What this document is
A guarantor agreement is a separate contract sitting alongside a commercial lease, under which a named third party (the guarantor) promises to meet the tenant's lease obligations if the tenant fails to do so. In practice, this usually means paying rent, service charges, insurance contributions and dilapidations, but it can extend to any covenant under the lease, including carrying out repairs or reinstating alterations.
The agreement can be written into the lease itself or signed as a standalone deed. Either way, it creates a direct liability between the guarantor and the landlord, which the landlord can call upon when the tenant defaults. Guarantors are commonly used where the tenant is a newly formed company, a subsidiary without significant assets, a sole trader, or a business without a trading history strong enough to satisfy the landlord's covenant checks.
The directors or parents of the tenant company are frequently asked to act as guarantor in a personal capacity, which carries real consequences worth understanding before signing.
How to use this document
Check who is being asked to guarantee what. Before agreeing anything, identify whether the guarantor is an individual (often a company director acting personally) or a parent company. The implications differ significantly, particularly around personal assets, and a personal guarantor should get clarity on the full scope of what they are signing up to.
Review the scope of the obligations. Read the lease carefully alongside the guarantor clause. The guarantor is typically liable for everything the tenant is liable for, which includes rent, insurance rent, service charge, repair costs, and any damages flowing from breach. Make sure the obligations being guaranteed are clearly defined rather than open-ended.
Understand the duration. A guarantor's liability normally runs for the contractual term of the lease, but it can extend further in some cases, for example where the lease is assigned and the outgoing tenant enters into an authorised guarantee agreement (AGA). Clarify when the liability ends, and whether any holdover period is covered.
Negotiate a cap or release mechanism. Where possible, try to negotiate a financial cap on liability, a time limit, or a release trigger (such as the tenant reaching a certain level of trading history or net assets). Landlords will not always agree, but it is worth raising, particularly for longer leases.
Sign as a deed where required. Guarantor agreements are commonly executed as deeds to remove any question over consideration and to extend the limitation period for claims. Make sure the execution formalities are followed properly, with witnesses where needed, so the document is enforceable.
No. The tenant holds the lease and has primary responsibility for meeting its terms. The guarantor is a separate party who only becomes liable if the tenant fails to perform. That said, once the tenant defaults, the landlord can usually pursue the guarantor directly for the full amount owed, without having to exhaust remedies against the tenant first.
Q How long does a guarantor remain liable under a commercial lease?
Liability typically lasts for the contractual term of the lease. If the lease is assigned to a new tenant, the original guarantor's liability usually ends at that point, though the outgoing tenant may be required to guarantee the incoming tenant under an authorised guarantee agreement. Statutory rules under the Landlord and Tenant (Covenants) Act 1995 govern this area.
Q Can a company director be asked to guarantee their own company's lease?
Yes, and this is very common where the tenant company is new, small, or has limited assets. The director signs in a personal capacity, meaning their personal assets can be at risk if the company defaults. Anyone signing in this position should think carefully about the exposure before agreeing.
Q What happens to the guarantor if the tenant goes insolvent?
Tenant insolvency is one of the main reasons landlords call on guarantors. If the tenant enters liquidation or administration, the landlord can pursue the guarantor for outstanding rent and other sums. The guarantor may also be required to take a new lease on the same terms, if the lease allows the landlord to demand this.
Q Can a guarantor's liability be capped?
It can, but only if the landlord agrees. Caps might be a fixed monetary amount, a limit based on a number of months' rent, or a time-limited guarantee covering only the first few years. Tenants with stronger bargaining positions, or where the covenant strength is reasonable, have a better chance of negotiating a cap.
Q Does the guarantor need independent legal input before signing?
It is a good idea. The liabilities can be substantial and long-running, especially for individual guarantors. Understanding the scope, duration and triggers before signing helps avoid nasty surprises later. An experienced legal adviser can talk through what the clause means for you based on what you describe.
Q Can a guarantor be released from their obligations early?
Usually only if the agreement itself provides for release, or if the landlord agrees to a variation. Common release triggers might include the tenant providing alternative security, the lease being assigned, or the passage of a set period. Without a contractual release mechanism, the guarantor is generally stuck for the full lease term.
Thinking about signing as a commercial lease guarantor?
Guarantor agreements can expose you to years of liability for rent, repairs and other lease obligations, and the wording varies widely from one lease to the next. An experienced legal adviser can help you think through what the clause means for you, based on what you describe on the call.
✓A plain-English explanation of what the guarantor wording covers
✓Practical perspective on the risks based on what you describe
✓What to watch out for before signing in your specific situation
✓Clarity on duration, scope and how liability might end
Personal call · For information only · Independent advisers
Written & reviewed by
Brad Askew Solicitor (non-practising)
Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice. LegalDocuments.co.uk is not a law firm and does not provide regulated legal advice.
This article is for general information only. It is a tool to help you find your way — not legal advice, and not a substitute for speaking to a qualified adviser about your situation.