Your estimated maximum new rent
Maximum increase = current rent × the guideline for the year the increase takes effect. Maximum new rent = current rent + that increase.
Free tool · Ontario · Estimate only
Ontario Rent Increase Calculator
Enter your current monthly rent and the year the increase takes effect, and see the dollar increase and the highest new rent under Ontario's rent increase guideline for that year. This tool works out the amount. The separate Ontario Rent Increase Checker tests whether a specific increase follows the notice and timing rules. This is an estimate only. It is not legal advice.
Written November 13, 2026
The rent you pay now, for the same unit and tenancy. The guideline increase is a percentage of this amount.
The guideline that applies is the one for the year the increase takes effect, not the year the notice is given.
How the estimate works
The formula. Maximum new rent = current rent × (1 + the guideline for the year the increase takes effect). The province's own sample calculation works the same way: on $1,000 of rent, the 2027 guideline of 1.9% gives an increase of $19.00 and a new rent of $1,019.00.
The guidelines used. 2025: 2.5%. 2026: 2.1%. 2027: 1.9%. The guideline is the maximum a landlord can increase most tenants' rent during a year without the approval of the Landlord and Tenant Board. It is calculated using the Ontario Consumer Price Index, with data from June to May used to set the guideline for the following year, and it is capped at 2.5%.
Sources: Government of Ontario, Residential rent increases — the guideline table (2025 at 2.5, 2026 at 2.1, 2027 at 1.9), the sample calculation, the list of units the guideline does not apply to, the 12-month rule, and the 90-day written notice rule.
Next step: read the full step-by-step guide: How to Apply for Rent-Geared-to-Income Housing in Ontario