RentMath

Rent Deposit Checker

Check the highest deposit allowed in Ontario or Manitoba, see whether a deposit paid is over the limit, and estimate the interest owed. Nothing you type is sent anywhere.

Enter the monthly rent.

Information only, not legal advice. Nothing you enter is stored or sent anywhere.

The rules, with sources

Last checked October 26, 2026.

Ontario

Manitoba

Questions about your own deposit: Landlord and Tenant Board (Tribunals Ontario) (Ontario) or Residential Tenancies Branch (Manitoba, 204-945-2476 (Winnipeg) or 1-800-782-8403 (toll-free in Manitoba)).

Frequently asked questions

How much can a landlord ask for as a deposit in Ontario?

A rent deposit of no more than one month's rent (one week's rent if the tenant pays weekly). It can only be used for the last month or week of the tenancy. A landlord may also ask for a key deposit, which cannot be more than the cost to replace the keys.

How much can a landlord ask for as a deposit in Manitoba?

A security deposit of no more than half of the first month's rent, and a pet damage deposit of up to one month's rent (for deposits collected on or after August 1, 2014). There can only be one pet damage deposit.

Does the landlord have to pay interest on the deposit?

Yes in both provinces. In Ontario the rate is the same as the rent increase guideline each year. In Manitoba the government sets the rate: 0.5% a year from 2002 to 2026, with no 2027 rate listed yet.

How soon must a Manitoba landlord return the deposit?

If there are no problems, within 14 days of the end of the tenancy, with interest. A claim against the deposit needs written notice, and the part that is not claimed must be returned.

Is the interest on this page exact?

No, it is an estimate and not legal advice. In Ontario the Residential Tenancies Act (section 106) says interest is paid every year at the guideline in effect when it is due, so we count only complete years from the date the deposit was paid. It does not say how to work out part of a year, so we do not put a leftover part-year in the total and have not confirmed a method for it with an official source. We show how two Landlord and Tenant Board orders counted a part-year (days over 365, simple interest) as an example only, and the Board has also stopped interest at the end of the month before the last rent period when the deposit was applied to that last month. Your landlord or the Landlord and Tenant Board may calculate it differently. For Manitoba we spread a simple yearly rate over the days held. In Manitoba the Residential Tenancies Branch has its own calculator. Use the estimate as a guide and ask the Board or the Branch before relying on it.

Does this checker store or send what I type?

No. It runs in your browser. Nothing you enter is stored or sent anywhere.