Ontario 2025 Rent Increase Guidelines. Housing rules in ontario require landlords who want to increase rent to offer 90 days’ written notice to tenants — rent cannot be raised more often than once per year. It's a rate that's the lowest in the country, below the average inflation rate of 3.1 per cent.

The province has set the 2025 rent increase guideline at 2.5%. Ontario is holding the annual rent increase guideline for 2025 at 2.5 per cent, which it says is currently the lowest rate in the country.