Rent increase calculator

How it works

New rent = current rent × (1 + increase %). The "years at this rate" line compounds the same increase each year. The proposed-rent check works backwards: (proposed rent ÷ current rent) − 1.

This calculator doesn't know your local rules. Many provinces, states and cities limit how much or how often rent can go up and require written notice in a set form and time frame. In Ontario, for example, rent can generally be raised only once every 12 months, with at least 90 days' written notice on the Landlord and Tenant Board's forms, and increases for many units are limited by the annual rent increase guideline (see the LTB's guide to the Residential Tenancies Act). Check the rules where your rental is before you send a notice.

Quebec: the TAL has its own calculation method

In Quebec, the landlord may propose an increase they consider fair and reasonable when the lease is renewed, and the tenant can accept or refuse it. If the tenant refuses, the landlord has one month from the tenant's reply to apply to the Tribunal administratif du logement (TAL) to have the rent fixed; otherwise the lease is renewed on the same conditions.

If the TAL fixes the rent, it doesn't use a flat percentage like the one above. It applies the Règlement sur les critères de fixation de loyer: for lease-modification notices given from January 1, 2026, a base percentage tied to the three-year average of Quebec's general CPI, plus possible adjustments for increases in municipal and school taxes and insurance, and for major repairs or improvements (capital expenditures). The TAL publishes the percentages every January.

We don't build those percentages into this page because they change every year and depend on your building's numbers. To estimate a Quebec increase, use the TAL's own tools:

• TAL – Calcul pour l'augmentation de loyer (official calculation tool)
• TAL – Pourcentages applicables aux critères de fixation de loyer (this year's percentages)
• TAL – Augmentation de loyer (how the Tribunal fixes rent, deadlines)

The TAL tool asks for the building's rents, taxes, insurance and major work, so keep those records handy. Our French Quebec bookkeeping spreadsheet totals them by building.

Estimates for planning only, based on what you enter. Not financial or tax advice. All calculations run in your browser and nothing is stored or sent.

Frequently asked questions

How do I calculate a rent increase percentage?

Divide the new rent by the current rent and subtract 1. For example, going from $1,500 to $1,600 is 1,600 ÷ 1,500 − 1 = 6.67%. Enter both amounts above to check.

Is there a maximum rent increase?

It depends on where the rental is. Some provinces, states and cities cap increases or tie them to a yearly guideline, and most require written notice. This calculator does the maths only; check your local rules.

How is a rent increase calculated in Quebec?

Landlord and tenant can agree on any increase. If they can't agree and the landlord applies to the Tribunal administratif du logement, the TAL fixes the rent using the criteria in its regulation (a base percentage plus adjustments for taxes, insurance and major work). Use the official TAL calculation tool to estimate it.