Guarantor
Co-signer
A person, often a parent, who promises to pay the rent if the tenant does not. Human-rights law limits when landlords may require one.
A guarantor is a person who promises a landlord that they will pay the rent if the tenant stops paying. A guarantor is often a parent, relative or close friend. Guarantors are sometimes called co-signers because they sign the lease too, though some provinces treat the two roles differently.
Manitoba's Residential Tenancy Branch explains one version of the difference. A co-signer signs the tenancy agreement and agrees to be responsible for the tenant's obligations. A guarantor signs a separate guarantee that the tenant will meet specific obligations. In Manitoba, a guarantee ends when a fixed-term tenancy ends, unless it says otherwise. It should state a maximum amount or say that liability is unlimited. A landlord claiming against a guarantor must show what they did to keep their loss to a minimum.
In Ontario, the Human Rights Code allows landlords to use guarantees when selecting tenants. Steps to Justice says a landlord may ask for a guarantor if you have bad references or bad credit. A history of not paying rent is another reason. The Ontario Human Rights Commission adds that a guarantor requirement must be the same for all tenants. It cannot apply only to people identified by a protected ground. A landlord cannot ask for one because you are a single parent, new to Canada, receiving social assistance or have a disability. Age is also protected, as long as you are at least 18, or at least 16 and independent from your parents.
Being a guarantor is a real legal commitment. Before signing, a guarantor should know exactly what is covered, how much, and for how long. That includes whether the promise continues if the lease renews.
Sources
- Steps to Justice: Can a landlord ask you for a guarantor
- OHRC: Policy on human rights and rental housing
- OHRC: Minimum income criteria (rental housing background paper)
- Manitoba RTB: Co-signers and guarantors
Last reviewed October 16, 2026.
Go deeper
Related terms in Screening & Credit
- Hard vs Soft Inquiry A hard inquiry is a credit check for a lending decision that can lower your score; a soft inquiry, like checking your own credit, does not.
- Protected Grounds Personal characteristics, such as race, disability or receipt of public assistance, that a landlord cannot use to refuse or treat a renter unfairly.
- Rent-to-Income Ratio Rent as a share of an applicant's income. In Ontario, using it as a cut-off is illegal outside subsidized housing.
- Rental Application The form and documents a prospective tenant submits to be considered for a rental, limited by privacy and human-rights law.
General information only, not legal, tax, or financial advice. Rules change and vary by province; confirm the current details with the relevant authority before you rely on them.