A security deposit is money a landlord holds at the start of a tenancy to cover unpaid rent, cleaning beyond normal wear, or damage when the tenant leaves. In Canada, that simple idea splits into very different provincial rules — and copying a clause from another province can put you on the wrong side of the Residential Tenancies Act (or Quebec’s Civil Code).
This guide answers the search question “what is a security deposit,” then compares Ontario, British Columbia, Alberta, and Quebec side by side, with brief notes on other provinces. Use it as an operator checklist, not a substitute for your provincial tenancy authority.
Disclaimer: Provincial tenancy rules change. Always verify amounts, interest rates, and return timelines with your provincial tenancy authority (or Tribunal administratif du logement in Quebec) before you collect, hold, or return a deposit. LendCity is a mortgage brokerage, not a landlord-tenant law firm. This article is educational only.
Quick comparison: what can landlords collect?
| Province | What can be collected | Typical maximum | Interest / trust | Return timeline (typical) |
|---|---|---|---|---|
| Ontario | Last month’s rent (LMR) only — not a damage deposit | One month’s rent | Interest at rent-increase guideline rate | Applied to final month; not a refundable damage fund |
| British Columbia | Security (damage) deposit; optional pet damage deposit | ½ month each; combined max 1 month | Interest at RTB rate (confirm current year) | Generally 15 days after written forwarding address |
| Alberta | Security / damage deposit (all refundable deposits count toward cap) | One month’s rent at start of tenancy | Interest-bearing trust; prescribed rate | 10 days after tenancy ends, with itemized statement |
| Quebec | Required security / damage / key deposits generally prohibited | First rent period only (up to one month) | N/A for banned deposits | N/A — do not require a deposit |
Other provinces in brief: Manitoba and Nova Scotia commonly cap damage deposits around half a month’s rent (higher for some furnished units in Manitoba). Saskatchewan generally allows up to one month. Always confirm the current statute and forms for your province before you advertise a listing.
What is a security deposit?
Outside Canada, “security deposit” usually means a refundable sum held against damage and unpaid rent. Inside Canada, the label changes by province:
- Damage / security deposit — refundable money held for breach, unpaid rent, or damage beyond normal wear (BC, Alberta, and several Prairie / Atlantic provinces).
- Last month’s rent deposit — prepaid final rent that cannot be used for damage (Ontario’s main allowed deposit).
- Pet damage deposit — a separate, capped deposit for pet-caused damage in some provinces (notably BC).
- Key deposit — sometimes allowed only for the actual replacement cost of keys or access devices (Ontario); elsewhere it may count toward a deposit cap or be restricted.
If someone asks “what is a security deposit” in a Canadian context, the accurate answer starts with: which province?
Ontario: last month’s rent, not a damage deposit
Ontario does not allow a traditional security or damage deposit under the Residential Tenancies Act. Landlords may collect a rent deposit equal to one rental period (usually one month’s rent) that can only be applied to the last month’s rent.
Key Ontario rules landlords get wrong:
- You cannot collect a separate damage, cleaning, or pet deposit.
- You cannot withhold the LMR for holes in the wall or a dirty fridge — damage claims go through the Landlord and Tenant Board (or small claims), with evidence.
- You must pay interest on the rent deposit each year at the provincial rent-increase guideline rate (or credit it toward an increase in the deposit when rent rises).
- A reasonable, refundable key deposit may be allowed for the actual cost of replacing keys or fobs — not as a backdoor damage fund.
For investors used to U.S. or Alberta-style damage deposits, Ontario feels upside down: screening and documentation matter more than holding cash at move-in. Pair deposit rules with stronger tenant screening questions and red-flag checks so you are not relying on a deposit you cannot legally take.
British Columbia: half-month security + optional pet deposit
BC allows a security deposit of up to half of one month’s rent (based on rent at the start of the tenancy). Landlords may also collect a pet damage deposit of up to half a month’s rent. Combined, the two cannot exceed one month’s rent. Monthly “pet rent” on top of a pet deposit is not permitted under the Residential Tenancy Act.
Operating details that drive RTB disputes:
- Interest accrues at the rate published by the Residential Tenancy Branch — confirm the current-year rate before you return funds (it has been 0% in some recent years).
- After the tenancy ends and you have the tenant’s written forwarding address, you generally have 15 days to return the deposit with interest, get written agreement to deductions, or apply for dispute resolution. Missing that window can expose you to a double-deposit order.
- Condition inspection reports at move-in and move-out protect your ability to claim deductions.
BC is one of the easiest places to lose a deposit claim by missing a deadline, not by being “wrong” about the damage.
Alberta: one-month deposit in trust
Alberta allows a security deposit of up to one month’s rent as of the start of the tenancy. That cap usually includes other refundable amounts (pet, key, cleaning) — you do not get a separate stack of deposits above one month.
Alberta-specific compliance:
- Hold the deposit in an interest-bearing trust account, separate from personal or operating funds, typically within two banking days of receipt.
- Pay interest at the government-prescribed rate for each year the deposit is held (the rate is set annually; confirm the current figure).
- Return the deposit plus interest — or provide an itemized statement of deductions — within 10 days after the tenancy ends.
- Complete required move-in and move-out inspection reports. Without them, damage deductions are often unavailable even when the unit is clearly damaged.
Unlike Ontario, Alberta’s deposit is not last month’s rent. Tenants still owe the final month; using the deposit as prepaid rent without agreement creates disputes at the Residential Tenancy Dispute Resolution Service (RTDRS).
Quebec: required deposits are generally banned
Quebec residential leasing under the Civil Code (notably article 1904) generally prohibits landlords from requiring any amount other than rent — including security, damage, and key deposits. At signing, the landlord can typically require only the first rent payment period, up to one month.
Practical implications:
- Do not advertise “damage deposit required” on a Quebec residential listing.
- Postdated cheques and similar instruments generally cannot be required either.
- Protection comes from screening, move-in/move-out photos, and TAL processes — not from holding tenant cash.
Some commentary discusses “voluntary” deposits; if a deposit is a condition of getting the unit, treat it as a required deposit and assume it is non-compliant. When in doubt, check the Tribunal administratif du logement guidance before you accept anything beyond the first rent period.
Common landlord mistakes (all provinces)
- Using the wrong province’s playbook — Ontario LMR rules are not BC security-deposit rules. Templates from Facebook landlord groups are a frequent source of illegal clauses.
- Collecting more than the cap — half a month in BC, one month in Alberta, LMR-only in Ontario, none required in Quebec.
- Missing return deadlines — especially BC’s 15-day window and Alberta’s 10-day statement/refund rule.
- Skipping inspections — without dated condition reports and photos, lawful deductions collapse.
- Treating deposits as last month’s rent where the law says otherwise (common Alberta error), or treating Ontario LMR as a damage fund (common Ontario error).
- Ignoring interest and trust rules — unpaid interest and commingled funds show up in dispute hearings.
For a wider view of rent control, eviction timelines, and deposit differences across the three largest English markets, read our Ontario vs Alberta vs BC landlord-tenant comparison.
How deposits fit an investment plan
Deposit rules affect risk, not purchase price. In Ontario and Quebec, you cannot lean on a large damage deposit; underwriting the tenant matters more. In Alberta and BC, deposits help, but process mistakes (trust accounts, inspections, return clocks) can wipe out the protection.
When you are buying or refinancing rentals, lenders care about cash flow, vacancy, and your ability to keep the property performing — deposit compliance is part of professional operations. If you are structuring financing for a first or next rental, explore residential mortgage financing options for Canadian investors and map deposit risk into your operating reserve, not into an illegal clause.
Soft next step
Provincial deposit law is one piece of owning rentals. Financing, cash-flow stress tests, and portfolio structure are another. If you want a clear path on the mortgage side while you tighten operations, book a free strategy call with LendCity — no obligation, and we will keep the legal disclaimers honest: we place mortgages; we do not practice landlord-tenant law.
Frequently Asked Questions
What is a security deposit in Canada?
Can landlords collect a damage deposit in Ontario?
How much security deposit can a BC landlord charge?
Are security deposits legal in Quebec?
How quickly must Alberta landlords return a deposit?
Disclaimer: LendCity Mortgages is a licensed mortgage brokerage. Content on this page is for educational purposes only and does not constitute legal, tax, investment, securities, or financial-planning advice. Rates, premiums, program terms, and regulations referenced are as of the page's last updated date and are subject to change. Any investment returns, rental yields, tax savings, or case-study figures shown are illustrative only — they are not guaranteed, not typical, and individual results will vary. Consult a licensed lawyer, Chartered Professional Accountant, or registered dealer before acting on any information above. Editorial standards.
Written by
Scott Dillingham
Published
August 11, 2026
Reading time
8 min read
Security Deposit
Money a landlord holds at the start of a tenancy to cover unpaid rent or damage beyond normal wear and tear when the tenant leaves. In Canada, rules are provincial: Ontario allows a last month's rent deposit only (not a damage deposit), British Columbia caps security deposits at half a month's rent (with an optional pet damage deposit), Alberta allows up to one month held in an interest-bearing trust account, and Quebec generally prohibits required security or damage deposits. Always confirm current limits, interest, and return timelines with the provincial tenancy authority.
Eviction
The legal process of removing a tenant from a rental property for reasons such as non-payment of rent, lease violations, or property damage. Eviction laws vary by province and typically require landlords to follow specific notice periods and tribunal processes.
Landlord-Tenant Board
A provincial tribunal or administrative body that resolves disputes between landlords and tenants, handles eviction applications, and enforces residential tenancy legislation. Each Canadian province has its own board or tribunal with specific procedures and timelines.
Market Rent
The rental rate that a property could reasonably command in the current market based on comparable properties, location, and condition. Understanding market rent is essential to maximize income while maintaining competitive positioning and minimizing vacancy.
Property Management
The operation, control, and oversight of real estate by a third party. Property managers handle tenant screening, rent collection, maintenance, and day-to-day operations.
Tenant Screening
The process of evaluating prospective tenants through credit checks, employment verification, rental history reviews, and reference checks. Thorough screening is the most effective way landlords can prevent costly problem tenancies and reduce turnover.
Turnover
The process and cost of preparing a rental unit for a new tenant after the previous tenant moves out, including cleaning, repairs, marketing, and vacancy time. High turnover rates significantly reduce profitability through lost rent and preparation expenses.
Hover over terms to see definitions. View the full glossary for all terms.