What does a guarantor for a tenancy actually agree to?
To be liable for the tenant's obligations if the tenant does not meet them — and the extent of that liability is considerably broader than most guarantors understand when signing.
What a guarantee typically covers:
Rent arrears, in full.
Damage beyond fair wear and tear.
Other breaches of the tenancy agreement, including costs.
The landlord's costs of recovery, where the agreement provides for it.
The features guarantors most frequently miss:
Joint and several liability applies. Where the tenancy is joint, a guarantor for one tenant may be guaranteeing the whole rent — not that tenant's share. This is the most consequential misunderstanding, and it means a parent guaranteeing for one student can be pursued for the entire house's arrears. The agreement should be read specifically for this.
It continues beyond the fixed term. Many guarantees are drafted to continue into any statutory periodic tenancy and any renewal — so a guarantee signed for a twelve-month term can persist for years. Check whether liability is limited to the initial term.
It is not conditional on being told. A guarantor may hear nothing for months and then be presented with substantial accumulated arrears. Requesting a term requiring prompt notification of any default is reasonable and rarely offered.
Demand can be immediate. A landlord need not exhaust remedies against the tenant first unless the agreement says so.
Your own credit and borrowing can be affected.
What to do before signing:
Read the actual document, not the description of it.
Establish whether liability is for one tenant's share or the whole rent, and ask for it to be limited if it is not.
Establish the duration, and seek a cap by term or by amount.
Ask for a notification clause.
Consider whether you could pay the full amount if required, since that is what you are agreeing to.
The alternatives: a larger deposit, subject to the statutory cap; rent paid in advance; and guarantor services, which charge a fee to act as guarantor and are worth comparing against the cost of the alternatives.
Guarantee requirements fall hardest on people without family able to guarantee, which is a recognised barrier to renting.
General information, not legal advice.