Ontario is the strictest province on deposits. Landlords may take only a last month's rent deposit capped at one rental period under the Residential Tenancies Act, 2006, and security, damage, pet and cleaning deposits are all illegal. Interest at the annual rent-increase guideline must be paid on that deposit each year. For tenancies first signed on or after 30 April 2018 the landlord must use the prescribed standard form of lease, and a tenant can demand it in writing if it was not provided. Rent generally cannot rise until twelve months into the tenancy, and a rent increase needs ninety days' written notice on Form N1. Disputes go to the Landlord and Tenant Board, and a lease term that conflicts with the Act will not be enforced.
British Columbia allows a security deposit of up to half of one month's rent under section 19 of the Residential Tenancy Act, plus a separate pet damage deposit also capped at half a month, so a landlord requiring both can ask for one full month at most. The tenant has thirty days to pay it, and the landlord must return it within fifteen days of the tenancy ending or of receiving the forwarding address. Move-in and move-out condition inspection reports are mandatory, and a landlord who skips them can forfeit the right to claim against the deposit. Rent increases are capped annually by the province and need three full months' written notice. The Residential Tenancy Branch resolves disputes.
Alberta caps the security deposit at one month's rent and requires it to sit in an interest-bearing trust account within two banking days. Alberta does not cap rent increases, which makes the notice rules the real protection : a periodic tenancy needs three full tenancy months' written notice before rent can rise, and increases are limited to once every 365 days. Move-in and move-out inspection reports are required within a week of possession and surrender, and a landlord who omits them loses the right to deduct for damage or cleaning. Quebec sits outside the common-law framework under the Civil Code of Québec and the Tribunal administratif du logement, and notably prohibits any deposit, so a common-law lease should never be used there without adaptation.