If you’re a tenant whose income doesn’t quite hit the landlord’s affordability mark, or a landlord looking at an application that feels a bit risky, a guarantor is the most common solution in the UK rental market. Most referencing agencies expect a tenant to earn at least 30 times the monthly rent, and when they fall short, a guarantor — typically a parent or close relative — steps in to cover the gap. But signing a guarantee isn’t a casual favour. Once the ink is dry, the guarantor can be pursued directly by the landlord without the landlord first having to chase the tenant.
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This article is general information only and does not constitute professional advice. For your specific situation, consult a qualified professional.
Guarantors are especially common in student lettings, joint tenancies where one tenant has weaker finances, and any situation where the landlord’s affordability checks don’t quite add up. Professional guarantor services have also become more popular, particularly for international students and young professionals without established UK networks. Here’s what you actually need to know.
What a Guarantor Actually Does — and What It Costs
A guarantor is a third party who provides a contractual promise to a landlord that, if the tenant fails to meet their obligations under the tenancy agreement, the guarantor will step in and make good the loss. This includes covering unpaid rent, damages beyond normal wear and tear, and sometimes legal costs.
What I tend to notice is that most people assume a guarantor is only on the hook for the fixed term. The reality is often much longer. If you’re thinking about signing a rental lease agreement, it’s worth understanding exactly what you’re taking on.
The Full Cost Picture — What Guarantors Actually Cover
The headline figure is the rent, but a guarantor’s liability can stretch much further. Most guarantees for tenancy agreements cover unpaid rent and damage to the property, but the guarantee only covers liabilities specified in the guarantee agreement. That means the scope varies enormously between contracts.
Rent increases are a common trap. If the tenancy contains a rent review clause and the guarantee specifies rent due “under the tenancy” (or similar wording), the guarantor could be liable for the higher amount without signing anything new. Variations to the tenancy, acts by other tenants in a shared house, and tenancies beyond the initial term can all be included if the guarantee is drafted broadly enough.
There’s also a timing risk. A guarantor’s liability cannot exceed that of the tenant, but the guarantor should check whether the tenant has a defence to a claim for arrears or a claim against the landlord. If the tenant has a valid reason for withholding rent, the guarantor might still be pursued before that defence is established.
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| What’s Covered | Typical Scope | Key Trap |
|---|---|---|
| Unpaid rent | Full amount due under the tenancy | Rent increases via review clauses may be included |
| Property damage | Beyond normal wear and tear | Damage by other tenants in a shared house |
| Legal costs | If specified in the guarantee | Can escalate quickly if the landlord pursues court action |
| Periodic tenancy | If the guarantee covers it | Liability can continue indefinitely after the fixed term |
If you’re a landlord or tenant trying to understand the full scope of a guarantee, it can be worth getting a second pair of eyes on the document. A tenant and landlord lawyer can walk through the specific wording and flag what’s actually covered.
Common Mistakes Guarantors and Tenants Make
Assuming liability ends when the fixed term ends
This is the most expensive misunderstanding. Many guarantees are drafted to continue into any statutory periodic tenancy that arises after the fixed term. That means the guarantor remains liable indefinitely unless and until the tenancy properly ends. The Renters’ Rights Act 2025 converted all assured tenancies to periodic tenancies from 1 May 2026, so this trap now applies to nearly every private tenancy. Guarantors who agreed to a fixed term that is cut short because the Act converted it to a periodic tenancy are released from liability for that fixed term — but only if the guarantee doesn’t explicitly cover the periodic tenancy.
Thinking a guarantor can withdraw whenever they want
Once the guarantee is signed and the tenancy begins, the guarantor is bound for whatever period the document specifies. There’s no unilateral right to withdraw. The only way out is if the tenancy ends properly, the landlord agrees to release the guarantor, or the guarantee itself contains a termination clause. What I’d do before signing is check whether there’s a specific end date or a mechanism for the guarantor to give notice.
Not checking whether all joint guarantors have signed
If the guarantee names more than one person as the guarantor, they must all sign it. Failure to do so means it is not binding on any of the named individuals. If all the joint guarantors have signed, they may be pursued individually or jointly — meaning each could be responsible for the whole amount unless the agreement states otherwise.
Overlooking the UK residency requirement
Guarantors must be UK residents. Overseas guarantors are almost universally rejected because enforcing a County Court Judgment against someone abroad is impractical. Landlords typically want a guarantor who is over 18, in stable employment or with reliable income, and who owns property or has demonstrable assets. An 80-year-old on a pension may struggle to meet the income test, even if they’re otherwise willing.
How the Guarantor Process Actually Works
Deciding whether a guarantor is genuinely needed
Before asking for or agreeing to a guarantor, think about why one is being requested. Common triggers include tenants with limited credit history, low income relative to rent, irregular or self-employed income, no previous rental history, or past financial difficulties such as CCJs or bankruptcies. Guarantor requirements also apply to tenants relocating from abroad who lack a UK credit history. None of this is discriminatory provided the landlord applies the same criteria consistently. Landlords cannot charge the tenant or the guarantor for the additional checks.
Checking the proposed guarantor’s suitability
Landlords and letting agents will run checks on the guarantor just as they would on the tenant. The guarantor must provide verifiable income — payslips, SA302, or an accountant’s reference — and consent to a soft credit search. The income test is typically 36 times the monthly rent. A good credit rating without defaults or County Court judgments is expected. A local authority housing or social services department could act as a guarantor for someone they have a duty or a power to accommodate.
Reading the guarantee document carefully before signing
The scope of liability varies enormously between agreements. The guarantee must be in writing and signed by the guarantor. Electronic signing is permitted. An exchange of emails may constitute an agreement in writing if they are signed by the guarantor or a person authorised by the guarantor. Guarantors must receive a copy of the tenancy agreement. The guarantor’s liability cannot exceed that of the tenant. If you’re unsure about the wording, a real estate lawyer can review the document before you commit.
What the Renters’ Rights Act 2025 changed
Two major changes take effect from 1 May 2026. First, all tenancies are now periodic — the old fixed-term assured shorthold model is gone. Second, guarantor liability for rent terminates when the tenant dies, but only for agreements signed on or after that date. For joint tenancies, this release applies only where the deceased tenant and the guarantor were related, or where every joint tenant has died. Landlords can no longer collect several months’ rent up front to offset a weak reference — the Act restricts rent in advance.
Frequently Asked Questions
Can a landlord pursue a guarantor before chasing the tenant? ▾
What happens if the tenant dies? ▾
Can a guarantor be held liable for damage caused by other tenants in a shared house? ▾
Is there an upper age limit for guarantors? ▾
What if the guarantor lives outside the UK? ▾
Can a guarantor be released from liability if the rent increases? ▾
What the Guarantor Role Means Going Forward
The Renters’ Rights Act 2025 has fundamentally changed the landscape. With all tenancies now periodic and guarantor liability ending on the tenant’s death for new agreements, the old assumptions about fixed-term guarantees no longer hold. Guarantors who signed before May 2026 need to check whether their liability extends into the new periodic tenancy structure. For anyone considering acting as a guarantor, the safest approach is to have the guarantee reviewed by a legal professional before signing — the cost of a review is far less than the cost of being pursued for months of unpaid rent.
Remember: this article is general information only. For advice on your specific situation, speak to a qualified professional.
If this was useful, you might also want to read Is Your Landlord Exploiting You? Know Your Rights as a UK Tenant.
Sources and Further Reading
Essential Apartment Lease Required Paperwork for Renters — A practical checklist of documents you’ll need when applying for a rental property, including guarantor forms.
Legal Documents (2025). Guarantors in Tenancy Law. 🔗
Apartemo (2025). Rent Guarantor Guide. 🔗
Shelter (2025). Guarantors for Tenancy Agreements. 🔗
Property Goose (2025). Guarantors for Rent Explained. 🔗
