Ontario LTB Form T3: Request a Rent Reduction
Learn when to use T3, what proof to attach and how to send it to the Board.
T3 asks the LTB to lower rent because a service or facility was reduced or stopped, or because municipal taxes and charges on the residential complex decreased. These are two different grounds, and the form asks for different proof for each.
This guide explains the official application, but does not submit it. Confirm case-specific filing requirements before acting.
Choose the right rent-reduction ground
- Reason 1 — service or facility: the landlord removed a promised parking spot, laundry access or another qualifying service. The reduction or discontinuation must have happened within the last 12 months. A former tenant may apply for this ground for events during their tenancy.
- Reason 2 — municipal taxes: the residential complex’s qualifying municipal taxes or charges went down. This ground is for current tenants; the form asks for base/reference years and official tax figures. The tax rules have distinct timing requirements, including special cases after a reassessment appeal.
T3 is not T6: when the problem is a landlord’s failure to repair or maintain the property, check the separate T6 maintenance application.
How to complete T3
- Part 1: enter the rental address and parties, and identify any related LTB cases.
- Part 2 — reason: check service reduction, tax decrease or both if eligible.
- If services were removed: name the service, whether it stopped or was reduced, and the date; explain how it was provided before the change.
- Rent history: list rent periods and amounts for the previous year, or from the start of tenancy if shorter.
- If taxes decreased: enter base and reference years and amounts; attach evidence of municipal property taxes for both years. An unsupported guess about tax savings is insufficient.
- Signature and filing: sign the form, pay the $53 application fee (or use an eligible fee waiver) and submit by an accepted channel.
Worked example: lost parking
A tenant pays $1,750 each month, including one parking space under the lease. On June 1, 2026, the landlord permanently removes the space. The tenant selects Reason 1, enters June 1, attaches the lease and emails showing the change, and requests an appropriate rent reduction. A parking value of $100/month might be argued using local comparable evidence, but the LTB decides the reduction—it is not automatically $100.
What happens next?
The LTB considers whether a qualifying service was withdrawn or taxes decreased and determines any lawful change in rent. Do not unilaterally deduct an estimated amount from rent based only on filing the application.
Avoid this mistake
For a tax-based T3, don't omit the actual municipal tax documents. For a service-based T3, identify the date the service changed.
Current filing procedure for Form T3: 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.