How often can an Ontario landlord raise rent—and how much notice is required?

Short answer

Generally, at least 12 months must pass after the tenancy begins or the last lawful increase, and the landlord must give at least 90 days’ written notice using the proper form.

The buyer or owner’s concern

An investor buys a property with below-market rent and assumes the purchase date resets the clock or allows an immediate increase to improve mortgage cash flow.

What Ontario’s official guidance says

Ontario’s rent-increase guidance explains the 12-month timing rule and 90-day notice requirement. For guideline-covered units, the permitted amount is also constrained unless the LTB approves an above-guideline increase.

What the rule does not guarantee

A change of ownership does not automatically create a new tenancy or market-rent reset. Verbal notice is not a safe substitute for the required process. Exempt units may avoid the guideline amount but not necessarily the timing and notice rules.

A practical Ontario example

Illustration only: The seller increased rent four months before closing. The purchaser generally cannot treat closing day as a new starting point and raise it again immediately.

Practical next steps

Review the lease, rent ledger, notices and last increase before waiving conditions. Use current lawful rent in the mortgage analysis and obtain legal guidance before promising investors a near-term increase.

Questions to ask before relying on the rent

What is the current lawful rent and when was it last increased?
Is the unit guideline-covered or genuinely exempt?
Do the lease, notices, ledger and seller’s statements agree?
Does the purchase require vacant possession or future higher rent to remain affordable?
Which issue needs a lawyer or licensed paralegal before conditions are waived?

Rajiv’s broker perspective

A lender’s rental worksheet and Ontario tenancy law answer different questions. The lender may recognize only part of the rent, while the owner may also be unable to increase rent or obtain vacancy on the expected date. I would qualify the mortgage using verified lawful rent, test vacancy and repair reserves, and compare A, alternative/B, MIC or private options only after the legal occupancy assumptions are confirmed.

Buying or refinancing a tenant-occupied property?

Send Rajiv the property type, lawful rent, lease dates and intended occupancy. He can test the mortgage using realistic rental assumptions and identify when independent landlord-tenant advice is needed.

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