Guarantors for Tenancies: How to Set One Up Properly

Now that large upfront-rent payments are capped, a guarantor has become one of the main ways a landlord can safely say "yes" to a good applicant who doesn't quite clear a standard check — a student, someone new to the UK, or the newly self-employed. But a guarantor is only worth having if the guarantee is set up so it would actually stand up when you need it. A vague promise, an unsigned form, or a guarantee that quietly lapsed is worth nothing at the moment it matters. Here's how a tenancy guarantor works and how to put one in place that holds. This is general guidance, not legal advice — guarantee wording and enforceability are genuinely technical, so use a properly drafted document and take advice where it matters, and verify anything specific on GOV.UK.

What a guarantor actually is

A guarantor is someone — usually a parent or close relative — who agrees to step in and meet the tenant's obligations if the tenant doesn't. In practice that means covering unpaid rent, and often the cost of damage or other breaches of the tenancy, up to whatever the guarantee document says. It's a genuine financial commitment, not a character reference, and the guarantor needs to understand that before they sign. Used well, it turns a borderline-but-decent application into a safe one; used carelessly, it gives you false comfort.

Be clear what the guarantee covers

The single most important thing is that the written guarantee spells out its scope. A well-drafted one makes clear:

• What obligations are guaranteed — typically rent arrears, and often damage and other breaches. Don't leave it to assumption.
• How much is covered — the whole liability, or a capped amount; be explicit.
• Whose obligations — on a joint tenancy, be clear whether the guarantor is backing just one named tenant or the whole joint-and-several liability, because those are very different exposures.
• How long it lasts — see below; this is where guarantees most often fall down.

Getting it legally sound

A guarantee is a legal commitment, and the formalities matter more than landlords expect. Broadly:

1. Put it in writing and get it signed — a guarantee generally has to be evidenced in writing to be enforceable; a verbal "I'll cover it" is effectively worthless.
2. Consider executing it as a deed — this is often the safest route, and it matters especially where the guarantee is signed after the tenancy has already started, when questions of "consideration" can otherwise arise. Take advice on how yours should be executed.
3. Identify the guarantor properly — full name and address, and verify who they are, so the person on the document is unmistakably the person you can pursue.
4. Give the guarantor a copy and time to read it — someone who understood what they signed is far harder to wriggle off the hook later.

Reference the guarantor, not just the tenant

A guarantor is only as good as their ability to pay, so treat them almost like a second tenant: check they can realistically cover the rent on top of their own outgoings, and — as with any check — do it fairly and consistently. Guarantors are commonly expected to be UK-based, often homeowners, and to pass an affordability check at a higher multiple of the rent than the tenant. Keep the guarantor's reference and the signed guarantee together with the rest of the tenancy file; an unevidenced guarantee is the one you'll wish you'd documented.

When the guarantor is asked to step in

If the tenant falls into arrears, the guarantee is part of your response — but it works best alongside good practice, not instead of it. Keep chasing arrears early and communicating with the tenant; involve the guarantor promptly and in writing once it's clear there's a problem, referring to the specific terms of the guarantee. Because the guarantor's liability flows from the tenant's, the same clean, dated rent record that supports any arrears claim is what you'll rely on when you ask the guarantor to pay.

What landlords should do now

1. Use a properly drafted written guarantee — don't rely on a homemade form or a verbal promise.
2. Spell out the scope — what's covered, how much, whose obligations, and for how long.
3. Get the formalities right — signed, likely as a deed, with the guarantor properly identified and given a copy.
4. Reference the guarantor for affordability, consistently and fairly, and keep the evidence.
5. Word it to survive a periodic tenancy, and take legal advice on the drafting — this is not the place to cut corners.

A guarantor can be the difference between turning a good tenant away and letting to them with confidence — but only if the guarantee would actually hold. Get it drafted properly, cover the right obligations for the right length of time, reference the person behind it, and keep the signed document on file. Do that, and the guarantee is a real safety net rather than a comforting piece of paper that folds the moment you lean on it.

General guidance for UK landlords, not legal advice. The formalities that make a guarantee enforceable, how it should be executed, and how far it extends over a periodic tenancy are technical legal questions that can turn on the exact wording and facts — always use a properly drafted guarantee, take professional legal advice, and verify the current position at GOV.UK.