What is a lease guarantor responsible for?

A guarantor promises to cover the tenant's obligations if the tenant doesn't — unpaid rent, damage beyond wear and tear, and other costs the lease makes the tenant liable for. If the tenant defaults, the landlord can pursue the guarantor for the full amount, not a share.

What's the difference between a guarantor and a co-tenant?

A co-tenant lives in the unit and is a full party to the lease with the right to occupy it. A guarantor (co-signer) usually does not live there and has no right to occupy — they only take on financial liability as a backup if the tenant fails to pay or causes damage.

How long is a guarantor on the hook?

It depends on the wording. Many guarantees are written to continue beyond the first term — into renewals and month-to-month periods — unless the document says otherwise. Read the guarantee carefully: you want it limited to a specific term and amount, not open-ended.

Can a guarantor be removed from a lease?

Only with the landlord's agreement, or if the guarantee was written to end at a set point (for example, after the first fixed term). Once a lease renews, a guarantee that doesn't specify an end date often carries forward, so get any release in writing.

Can a landlord require a guarantor?

Yes, a landlord can ask for a guarantor as a condition of renting — but they can't require one only from certain groups in a way that breaches human-rights law (for example, demanding a guarantor only from newcomers or students while not asking others).

Home BlogCo-signers & Guarantors

CanadaOctober 3, 20266 min read

Co-signers & Guarantors on a Lease: Your Rights

Being asked to co-sign for your kid, a friend, or a roommate? A guarantee can follow you for years and cost you thousands. Here's exactly what you're agreeing to — and how to limit the risk before you sign.

By the LeasePlain Editorial Team · Checked against Canadian residential-tenancy & contract law per our editorial standards·Last reviewed October 2026

Guarantor vs. Co-tenant

These two roles get confused constantly, and the difference matters a lot:

Co-tenant: lives in the unit, is a full party to the lease, and has the right to occupy it. Usually jointly and severally liable with the other tenants.
Guarantor (co-signer): does not live there and has no right to occupy. They only step in financially if the tenant defaults.

What You're Actually on the Hook For

A guarantor backs the tenant's obligations: unpaid rent, damage beyond normal wear and tear, and other amounts the lease makes the tenant responsible for. If the tenant stops paying, the landlord can come after the guarantor for the full amount — not a share. You have the tenant's liability without the tenant's right to live there.

How Long It Lasts (The Trap)

This is where co-signers get burned. Many guarantees are written to continue past the first term — through renewals and into month-to-month — unless the document says otherwise. You could be guaranteeing rent years later, at a higher amount, for a tenancy you forgot you co-signed. Always check whether the guarantee has an end date and a dollar cap.

How to Limit Your Risk Before Signing

Cap the term: ask that the guarantee end when the first fixed term ends.
Cap the amount: limit liability to a stated maximum (e.g., a few months' rent).
Limit the scope: rent only, excluding open-ended damage claims where possible.
Get notice rights: require the landlord to tell you promptly if the tenant misses rent, so problems don't snowball.
Get any release in writing: never rely on a verbal "you're off the hook."