The Landlord and Tenant Board (LTB) in Ontario only handles disputes between landlords and tenants. If you and your roommates are all named on a single lease and one person stops paying their share of the rent, you must pay the landlord the full amount to avoid eviction, and then sue your non-paying roommate in Small Claims Court.
Understanding Joint and Several Liability in Ontario Leases
Living with roommates is a financial necessity for many people in cities like Toronto, Guelph, and Ottawa. 🏠 When two or more people sign a single Ontario Standard Lease together, they become “co-tenants” (also known as joint tenants). While splitting the rent fifty-fifty seems simple enough, relationships can deteriorate quickly. If a roommate loses their job, moves out unannounced, or simply refuses to pay their portion of the rent, panic usually sets in.
A critical legal concept governs this situation: Joint and Several Liability. This means that the landlord does not care how you divide the rent internally. To the landlord, the group is viewed as a single entity. If the monthly rent is $2,000 and your roommate fails to pay their $1,000 share, the landlord will consider the entire apartment to be $1,000 in arrears. The landlord can, and will, issue an N4 eviction notice for non-payment of rent naming everyone on the lease.
Many tenants mistakenly try to file an application against their roommate at the Landlord and Tenant Board (LTB). 🚫 This will result in immediate rejection. The LTB has absolutely zero legal jurisdiction over internal disputes between co-tenants. If you want to recover the stolen rent money and protect your own credit and rental history, you must step out of the RTA system and turn to the civil courts.
Step-by-Step Process for Handling a Non-Paying Roommate
Navigating a roommate dispute requires protecting your tenancy first, and seeking financial justice second. Here is the legally sound process to follow when a co-tenant stops contributing.
Step 1: Pay the Full Rent to the Landlord
Your absolute priority is protecting yourself from an LTB eviction. If possible, you should pay the entire rent amount to the landlord, including your roommate’s missing share. By keeping the rent account in good standing, you prevent the landlord from filing an N4 Notice and ruining your personal rental history. You can then pursue your roommate for the money they owe you.
Step 2: Collect Your Internal Evidence
To win your money back, you need proof of your internal agreement. 📋 Gather all text messages showing how you agreed to split the rent. Print out bank statements or e-transfer histories proving that the roommate previously paid $1,000 exactly on the 1st of every month. If you signed an internal “Roommate Agreement” when you moved in, make sure you have a physical copy ready.
Step 3: Send a Formal Demand Letter
Before going to court, you must attempt to resolve it. Write a formal demand letter to your roommate stating exactly how much they owe you for covering their share of the lease. Give them a strict deadline (e.g., 14 days) to pay you back. Send this via registered mail or email so you have proof it was received.
Step 4: File a Claim in Ontario Small Claims Court
If they ignore the demand letter, you must file a Plaintiff’s Claim at the Ontario Small Claims Court. 💰 You will serve the lawsuit to your roommate, attend a settlement conference, and eventually go before a judge. You will present your evidence that the co-tenant breached your internal contract, and the judge can issue a binding order forcing them to repay you.
How Much Does it Cost in Ontario?
Pursuing a roommate for unpaid rent involves civil court fees, which are generally lower than standard Superior Court, but still require an investment (CAD):
- Small Claims Filing Fee: It currently costs about $108 CAD to file a Plaintiff’s Claim in Ontario Small Claims Court.
- Service and Enforcement: You may need to pay $50 to $100 CAD to have a process server deliver the lawsuit to your roommate. If you win and they still don’t pay, garnishing their wages costs additional court fees.
- Legal Representation: Small Claims Court is designed for self-representation. However, if you hire a paralegal, expect to pay between $1,000 and $2,500 CAD for their services.
- The Cost of Inaction: If you let the landlord evict you, you could be ordered to pay thousands in rent arrears, plus your credit score will be severely damaged, making it nearly impossible to rent again in Ontario.
How Long Does the Process Take?
Civil justice requires immense patience. If you are forced to sue your roommate, filing the claim online takes just an afternoon. However, the court will give your roommate 20 days to file a formal defense.
As of May 2026, scheduling a mandatory Settlement Conference in Small Claims Court generally takes between 4 to 8 months. 📅 If the dispute cannot be settled in that conference, waiting for a final Trial date can easily take 1 to 2 years depending on the regional municipality’s backlog. This is why paying the landlord upfront and suing later is the only way to ensure you aren’t evicted while waiting for the court.
Co-Tenants vs. Tenants in Common vs. Boarders
| Arrangement | Who Signs the Lease? | Who Pays the Landlord? |
|---|---|---|
| Co-Tenants (Joint Tenancy) | All roommates sign ONE lease together. | All are jointly responsible for the total rent. |
| Tenants in Common | Roommates sign separate, individual leases for a specific room. | You only pay your own lease. Landlord chases the other roommate. |
| Roommate / Boarder | Only the primary tenant signed with the landlord. | Primary tenant pays landlord. Boarder pays primary tenant. (Not protected by LTB). |
Frequently Asked Questions (FAQ)
Can the landlord just evict the roommate who didn’t pay?
No. On a joint lease, a landlord cannot evict just one person. Evictions are “all or nothing.” If the landlord serves an N4 for non-payment, it names every single tenant on the lease. If an eviction order is granted, everyone is removed from the property.
Can I legally change the locks on my non-paying roommate?
Absolutely not. If your roommate’s name is on the lease, they have the exact same legal right to access the apartment as you do. Changing the locks is an illegal act, and the police or the LTB can force you to let them back inside immediately.
What happens if my roommate moves out without telling the landlord?
In Ontario, if one co-tenant vacates without proper termination, the lease generally continues for the remaining tenant. The remaining tenant is legally responsible for 100% of the rent moving forward. You must either find a new roommate to help cover costs or give your own 60 days’ notice (N9) to terminate the tenancy.
Can I sue my roommate for unpaid utilities?
Yes. Just like rent, if the utility bills (hydro, gas, internet) are under your name and your co-tenant refuses to pay their agreed-upon half, you can include these missing utility payments in your lawsuit at the Ontario Small Claims Court.
Does the LTB handle disputes if I am the primary tenant and they are my boarder?
No. If you are the only person on the lease and you rent out a spare room to a boarder who shares a kitchen and bathroom with you, the RTA does not apply. If they stop paying, you do not use the LTB; you can generally give them “reasonable notice” to leave under common law.
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