Is a standard lease required in Ontario?
For most private residential tenancies entered into on or after April 30, 2018, the landlord must use the province's Standard Form of Lease, also called Form 2229E. It is mandatory, and its sections cannot be changed. A few tenancy types are exempt, including care homes, mobile home parks and land lease communities, most social housing, and co-operative housing.
What the standard lease covers
The form sets out the essentials in a consistent format: the legal names of the landlord and tenant, the rental address, the rent amount and due date, what is and is not included in the rent, and the rules for the tenancy. It also includes a plain-language appendix that explains the rights and responsibilities both sides have under the Residential Tenancies Act.
If your landlord won't provide it
A tenant who did not get a standard lease can ask for one in writing. If the landlord does not provide it within 21 days, the tenant can withhold one month's rent. If the landlord still does not provide it within 30 days after the tenant first started withholding, the tenant does not have to repay that month. This is a real and specific right, so the written request is worth keeping a copy of.
What you can and can't add
The landlord and tenant can add their own reasonable terms in the additional-terms section, but nothing added can take away a right or contradict a responsibility under the Residential Tenancies Act. A clause that tries to do so is simply unenforceable, even if both sides signed it. In Ontario the only permitted deposit is a last month's rent deposit, capped at one month, and it earns interest each year.
Once a lease is signed, keeping it, the rent record, and the key dates in one place is what turns a later question into a lookup. See how Habyn handles lease management and rent tracking.