Last month's rent vs illegal deposits in Ontario: what landlords can collect

Many Ontario landlords learned renting in another province or in the US, where a damage deposit is normal. Under the Residential Tenancies Act, that habit creates Board risk fast.

Ontario lets you take a rent deposit for the last rental period. It does not let you take a security deposit, damage deposit, pet deposit, or cleaning deposit. Confusing those categories is one of the most common move-in mistakes self-managing landlords make.

This guide is practical process guidance, not legal advice. Edge cases need a licensed paralegal or lawyer.

What you can collect at move-in

For a monthly tenancy, you may collect a rent deposit of up to one month's rent. For a weekly tenancy, the cap is one week's rent. Collect it on or before the tenancy starts.

That money is prepaid rent for the last month or week before the tenant leaves. It is not a fund you hold against damage, cleaning, unpaid utilities, or mid-tenancy arrears.

You may also collect the first period's rent when the tenancy begins. That is rent in advance for the first period, separate from the last-month deposit.

A refundable key or fob deposit is tightly limited. Keep it to the reasonable cost of replacing the key, fob, or access card, and return it when the tenant returns the keys. Do not use a key deposit as a second security cushion.

Official overview: the LTB Guide to the Residential Tenancies Act.

What you cannot collect

These are off-limits as deposits under the RTA for covered residential tenancies:

• Damage or security deposits of any amount
• Pet deposits
• Cleaning deposits
• Non-refundable move-in or "admin" fees dressed up as deposits
• A rent deposit larger than one rental period's rent

Calling it something else on the lease does not fix it. If the money is held as security against future loss, it is the wrong kind of deposit.

How last month's rent must be used

Apply the rent deposit to the final rental period before the tenancy ends. That is its only lawful use.

Do not keep it at move-out for a hole in the wall, carpet cleaning, or unpaid hydro. If you believe the tenant caused damage beyond normal wear, that claim is a separate Board process. Pocketing LMR for repairs is how T1 applications start.

When rent goes up lawfully, you can usually top up the deposit so it still matches one period of current rent. Track that top-up in the same ledger as the original deposit.

Interest is also part of the deposit rules. Ontario requires landlords to pay interest on a rent deposit. Confirm the current rate and timing on ontario.ca or with advice before you set a yearly habit. Put the calculation in writing each year.

Why US and out-of-province habits fail here

In many markets, a damage deposit is the default move-in ask. In Ontario, the Act drew a different line. The Board can order repayment of illegal deposits, often with interest. Collecting money the Act forbids is not a paperwork shrug. It is a listed problem under the statute.

If you already hold an illegal deposit, do not wait for a hearing to "see what happens." Get advice on returning it and cleaning up the lease file.

Move-in money checklist

1. Confirm the unit is covered by the RTA.
2. Collect at most one period of rent as a last-period rent deposit.
3. Collect first-period rent separately and receipt both amounts clearly.
4. Skip damage, pet, cleaning, and open-ended security deposits.
5. If you take a key deposit, cap it at replacement cost and make it refundable.
6. Write on the receipt that the rent deposit applies to the last rental period only.
7. Store the deposit amount, date, and interest payments in one ledger.
8. Never apply LMR to damage or cleaning at move-out.

Damage still has a path

Tenants remain responsible for damage they, their guests, or other occupants cause. The fix is not an illegal deposit. Document the unit at move-in and move-out, keep invoices, and use the Board process when you need an order. That is slower than skimming a deposit. It is the process Ontario expects.

Related reading: Understanding Ontario's Standard Lease and Why US property tools fail Ontario landlords.

Keep the file clean

Ontario-specific tools help you store lease amounts, deposits, and notice history in one place so you do not treat LMR like a US-style security deposit by accident. Join the Ontario Landlord waitlist if you want that workflow on iOS.

Bottom line

In Ontario, last month's rent is prepaid rent for the final period. Damage, pet, and security deposits are not a workaround. Collect the right amount, label it correctly, apply it only to the last period, and pursue damage through the Board when you must. That keeps the tenancy file defensible.