HomeLife Frontier Realty Inc., Brokerage Joonghyun Ahn, Sales Representative

Group: Renting and landlords

Guarantor (co-signer)보증인, 개런터 (rent guarantor)

In one sentence

A person who promises in writing to pay if the tenant does not pay rent or breaks the lease. An Ontario landlord may require one only under the same rule for every applicant, and the guarantor takes on real risk.

Last checked Oct 30, 2026

What is it?

A guarantor (often called a co-signer) is a person who promises to pay the landlord if the tenant does not pay the rent or breaks the lease and the landlord loses money. It is usually a parent, sibling, relative or close friend.

In Ontario a landlord is allowed to require "a guarantee for the rent". That is written in O. Reg. 290/98, s. 2 (1), under the Human Rights Code. Newcomers without Canadian credit or rental history, students, and young people in their first job are often asked for one.

A guarantor does not live in the unit. Under the Residential Tenancies Act (RTA), a "tenant" is a person who pays rent for the right to occupy the unit, so the guarantor is not a tenant but a separate person who made a promise.

How is it put in writing?

The 17 sections of the Ontario standard lease have no guarantor box. So the guarantee is usually a separate guarantee agreement, or a document attached under section 15, "Additional terms". Either way it must be in writing to avoid disputes later.

Things to check in the guarantee: what it covers (rent only, or damage and costs too), whether there is a dollar cap, how long it lasts (the first term only, or renewals too), whether the landlord must ask the tenant first, and which court handles disputes.

Have a lawyer read it before you sign. Once signed, it is hard to get out of, even if the tenant’s or landlord’s situation changes.

What the guarantor risks

  • Paying the unpaid rent. If the tenant missed several months, that can be all of it.
  • Depending on the wording, paying for damage to the unit and the landlord’s legal costs too. Check whether it says "rent only".
  • Being sued. Because a guarantor is not a tenant, how Landlord and Tenant Board (LTB) procedures apply can differ case by case, so get advice from a lawyer or community legal clinic as soon as you receive a claim.
  • A court judgment that is not paid can affect the guarantor’s credit record.
  • The guarantee stays even if you fall out with the tenant. A guarantor has no right to remove the tenant or end the lease.

How long does it last?

No law sets the length. The wording of the guarantee does. Many guarantees say "for as long as the tenancy continues, including renewals", so the guarantee goes on after the first year ends.

In Ontario, when a fixed-term lease ends it automatically becomes a month-to-month tenancy on the same terms (RTA, s. 38 (1)). If the guarantee covers renewals, it can continue through that month-to-month period.

To limit it, ask before signing for wording such as "the first term only (for example, 12 months)" or "up to a maximum of $X". If you already signed, the only way out is the landlord’s written agreement to release you.

When a landlord may, and may not, require a guarantor

  • May: when the same rule applies to every applicant, or when there is a real reason such as poor references, poor credit or a history of not paying rent. (OHRC policy)
  • May not: only because the applicant is a newcomer, a lone parent, young, receiving social assistance, has a disability, or belongs to another group the Human Rights Code protects. That is discrimination.
  • May not make the guarantor meet a rent-to-income ratio that could not be applied to the tenant. (OHRC policy)
  • May not take a bigger deposit instead of a guarantor. The only deposits allowed are a last month’s rent deposit and a refundable key deposit (RTA, ss. 105 and 106; O. Reg. 516/06, s. 17).

Alternatives to a guarantor

  • Proof of income and savings: an employment contract, pay stubs and a Canadian bank balance letter show you can pay the rent.
  • References: letters from a landlord or employer abroad (translated into English) help. The OHRC says a lack of history must not count against you.
  • Tenant insurance: under section 11 of the standard lease a landlord may require liability insurance. Having it eases the landlord’s worry about damage.
  • Post-dated cheques or automatic payments cannot be required: a landlord may not require a tenant to provide post-dated cheques or allow automatic debits (RTA, s. 108). A tenant may still offer them voluntarily for convenience.
  • A larger deposit cannot be required, and money paid voluntarily can be hard to get back, so ask a lawyer first.

Not the same as a mortgage co-signer

When you buy a home, a "co-signer" joins the mortgage contract and is responsible for the whole loan. A rent guarantor only guarantees money owed under a lease. Both are promises to pay, but the amounts, the length and the laws are different. See "Mortgage" for the mortgage side.

Example

Example

Student A wants to rent a Mississauga condo at $2,200 a month. The landlord asks every applicant for a guarantor form, and A’s aunt in Toronto agrees. Before signing, the aunt asks for the wording "the guarantee covers rent for the first 12-month term only, up to a maximum of $6,600 (three months)", and the landlord agrees.

Ten months later A misses two months of rent. The landlord claims from A first, then asks the aunt for $4,400, which is within the cap, and she pays. Had she signed "including renewals, no limit", she could have been liable for debts that built up after the lease turned month-to-month.

What the law and official sources say

Quotes are copied word for word. The "In plain words" lines are our explanation, not an official translation.

O. Reg. 290/98 — A guarantee for the rent may be requiredO. Reg. 290/98 (Business Practices Permissible to Landlords in Selecting Prospective Tenants for Residential Accommodation), s. 2 (1)
A landlord may require a prospective tenant to obtain a guarantee for the rent.

In plain wordsA landlord may ask an applicant to get a guarantee for the rent (a guarantor), but not as a way to discriminate (see section 4).

Source: ontario.ca/laws/regulation/980290 · checked Oct 30, 2026

O. Reg. 290/98 — No authority to discriminateO. Reg. 290/98, s. 4
Nothing in this Regulation authorizes a landlord to refuse accommodation to any person because of race, ancestry, place of origin, colour, ethnic origin, citizenship, creed, sex, sexual orientation, gender identity, gender expression, age, marital status, family status, disability or the receipt of public assistance.

In plain wordsBeing allowed to ask for a guarantor does not let a landlord refuse someone because of where they come from, citizenship, age, family status, public assistance and so on.

Source: ontario.ca/laws/regulation/980290 · checked Oct 30, 2026

OHRC — Guarantors only under the same rule for everyoneOntario Human Rights Commission, Policy on human rights and rental housing, "Choosing tenants"
Housing providers can also ask for a “guarantor” to sign the lease – but only if the landlord has the same requirements for all tenants, not just for people identified by Code grounds, such as recent immigrants or people receiving social assistance.

In plain wordsA landlord may ask for a guarantor, but only if every tenant faces the same requirement, not just newcomers or people on social assistance.

Source: ohrc.on.ca/en/policy-human-rights-and-rental-housing · checked Oct 30, 2026

OHRC — No rent-to-income ratio for the guarantorOntario Human Rights Commission, Policy on human rights and rental housing, Part V, s. 4.2.6 "Guarantors"
When landlords request a co-signer or guarantor, they cannot require that this person meet minimum rent-to-income ratios that they could not impose on the prospective tenant.

In plain wordsA landlord cannot demand that a guarantor meet an income ratio that could not be demanded of the tenant.

Source: ohrc.on.ca/en/policy-human-rights-and-rental-housing/v-identifying-discrimination-rental-housing · checked Oct 30, 2026

Residential Tenancies Act, 2006 — Deposit capped at one month’s rentResidential Tenancies Act, 2006, S.O. 2006, c. 17, s. 105 (1) and s. 106 (2)
The only security deposit that a landlord may collect is a rent deposit collected in accordance with section 106. … The amount of a rent deposit shall not be more than the lesser of the amount of rent for one rent period and the amount of rent for one month.

In plain wordsThe only deposit a landlord may take is a rent deposit, and it cannot be more than one month’s (or one rent period’s) rent. Taking a bigger deposit instead of a guarantor is illegal.

Source: ontario.ca/laws/statute/06r17 · checked Oct 30, 2026

Residential Tenancies Act, 2006 — Post-dated cheques cannot be requiredResidential Tenancies Act, 2006, S.O. 2006, c. 17, s. 108
Neither a landlord nor a tenancy agreement shall require a tenant or prospective tenant to, (a) provide post-dated cheques or other negotiable instruments for payment of rent; or (b) permit automatic debiting of the tenant’s or prospective tenant’s account at a financial institution, automatic charging of a credit card or any other form of automatic payment for the payment of rent.

In plain wordsA landlord cannot make post-dated cheques or automatic payments a condition of renting.

Source: ontario.ca/laws/statute/06r17 · checked Oct 30, 2026

Residential Tenancies Act, 2006 — Fixed term becomes month-to-monthResidential Tenancies Act, 2006, S.O. 2006, c. 17, s. 38 (1)
If a tenancy agreement for a fixed term ends and has not been renewed or terminated, the landlord and tenant shall be deemed to have renewed it as a monthly tenancy agreement containing the same terms and conditions that are in the expired tenancy agreement and subject to any increases in rent charged in accordance with this Act.

In plain wordsWhen a one-year lease ends, the tenancy continues month-to-month on the same terms. If the guarantee covers renewals, it can continue through this period too.

Source: ontario.ca/laws/statute/06r17 · checked Oct 30, 2026

Common questions

Does the guarantor have to live in Canada?

No law says so. It is up to the landlord, and most want someone with Canadian income and a credit record. Landlords often refuse a guarantor abroad because collecting from them would be hard. Ask the landlord directly.

Does the guarantor get a credit check too?

Usually the landlord asks the guarantor for proof of income and consent to a credit check as well. But demanding that the guarantor meet an income ratio that could not be demanded of the tenant goes against OHRC policy.

Is the guarantor still liable after the tenant moves out?

If the tenancy ended properly (notice given and the tenant moved out), there is no liability for rent after that. Claims for rent or damage from before the move-out can remain, depending on the guarantee wording. If the tenant leaves without notice the tenancy may not have ended; see "Ending a tenancy".

Can a guarantor withdraw part-way through?

Unless the guarantee has an exit clause, you need the landlord’s written agreement, and the landlord does not have to agree. That is why a time limit and a dollar cap matter before you sign.

Can the landlord claim from the guarantor right away, or must they go to the tenant first?

It depends on the wording. Some guarantees let the landlord claim from the guarantor as soon as the tenant misses a payment. Before signing, you can ask for wording that the landlord must claim from the tenant first. Ask a lawyer if it is unclear.

Guides that use this term

Sources checked

  1. O. Reg. 290/98: Business practices permissible to landlords in selecting prospective tenants (e-Laws) · checked Oct 30, 2026
  2. Ontario Human Rights Commission, Policy on human rights and rental housing · checked Oct 30, 2026
  3. OHRC, Policy Part V, s. 4.2.6 Guarantors · checked Oct 30, 2026
  4. Residential Tenancies Act, 2006, ss. 2, 38, 105, 106, 108 (e-Laws) · checked Oct 30, 2026
  5. Guide to Ontario’s standard lease (17 sections) · checked Oct 30, 2026