Two numbers decide whether a rent increase is valid: the amount and the date. This tool does both. Work out a guideline increase, find the exact day you have to serve notice by, and check the 12 month rule before you send anything.
For the rules behind it, read our guide to Ontario's 2027 rent increase guideline and whether your unit is exempt from rent control.
The guideline for 2027 is 1.9% and for 2026 it is 2.1%. If your unit is exempt from the guideline there is no cap on the amount, but the notice and timing rules still apply.
Ontario requires at least 90 days written notice of a rent increase and at least 12 months between increases. Use Form N1 for a guideline increase, or Form N2 where the unit is exempt. The effective date has to be the first day of a rental period, and if you serve by mail you have to add the deemed service days. Guideline figures are published by the Ministry of Municipal Affairs and Housing at ontario.ca. General information as of 2026-08-04, not legal advice. KEILTY owner clients: we handle the notice and the timing for you.
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