Ontario LTB Form T4: Landlord Broke an N10 Rent Agreement
Know when this application applies, how to fill it out, what to attach and what happens next.
T4 lets a tenant request repayment of all or part of an agreed above-guideline rent increase when the landlord does not carry out the work or service promised in a signed N10 agreement. The crucial prerequisite is an actual Form N10 agreement between landlord and tenant.
This guide explains the official application, but does not submit it. Confirm case-specific filing requirements before acting.
When is T4 the correct form?
Suppose the tenant and landlord sign an N10: the tenant agrees to an additional rent increase in exchange for the landlord installing new cupboards or providing another agreed improvement. If the landlord never provides what was promised, the tenant may seek repayment of the above-guideline portion using T4.
You must file within two years of the rent-increase date stated in the agreement, not two years after you happen to notice the unfinished work. If there was no signed N10, T4 is likely not the correct route; consider whether a different rent or maintenance remedy applies.
How to complete T4
- Part 1: identify the rental unit, tenant and landlord, and any related LTB file numbers.
- Part 2 — rent increase: enter the agreed increase date, the former rent, the agreed new rent and the guideline portion, so the amount above the guideline is visible.
- Broken promises: state exactly which N10 term was not completed, when performance was due, and what was actually done.
- Two-year rent history: list rent paid in each period for the previous two years, or since moving in if shorter.
- Evidence: attach the signed N10, rent-payment proof, communication about missing improvements and any photos or inspections.
- Signature and payment: sign, pay the current $53 filing fee or request a qualifying waiver, and file with the LTB.
Worked example: missing improvements
Rent was $1,000. A lawful guideline increase would have been $20, but a signed N10 raised rent by $50 in exchange for new cupboards. The above-guideline portion is $30/month ($50 − $20). If cupboards were never installed and the tenant paid that amount for six months, the tenant can show $180 as the disputed above-guideline portion, subject to the T4 rules and the LTB’s decision. The example assumes the relevant guideline was 2%; confirm the actual increase year.
What happens next?
The LTB considers the N10 and the landlord's performance. It may order repayment of all or some of the increased rent as allowed by law. T4 does not automatically erase every rent increase; it addresses breach of the specific N10 agreement.
Avoid this mistake
Do not claim the full new rent as an overcharge. Identify the additional amount above the relevant guideline and the broken N10 condition.
Current filing procedure for Form T4: the LTB lists email, mail/courier and participating ServiceOntario locations, not the general Tribunals Ontario Portal, for this application. If filing by email, send the completed application to ltbpayments@ontario.ca, follow the LTB’s secure payment-link instructions and pay before its three-calendar-day expiry. Do not email credit-card numbers. Confirm the current process directly with the LTB before filing.