Canadian Rental Security Deposit Interest Calculator

Every Canadian province and territory sets its own rules for residential rental security deposits: maximum amount, whether interest is required, and how the rate is set. Some prescribe a rate by regulation (Alberta, most others); Ontario ties interest on last-month's-rent deposit to the annual rent-increase guideline; Quebec prohibits deposits entirely. This calculator handles all of them.

Coverage philosophy

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  Full historical calculation:Alberta (rate schedule verified against Regulation 89/2006) and Ontario (rate schedule verified against LTB rent-increase guidelines).
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  Rule summary + max deposit + interest requirement + authoritative-source link:BC, Manitoba, Saskatchewan, Nova Scotia, New Brunswick, Newfoundland and Labrador, Prince Edward Island, Yukon, Northwest Territories, Nunavut.
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  Prohibited-deposit explainer:Quebec, where the Civil Code prohibits residential security deposits.

Why rate schedules for AB and ON specifically

Alberta and Ontario are the two provinces where the rate history is both publicly published (King's Printer Alberta Regulation 89/2006 and Ontario LTB guideline archive) and stable enough to compute reliably. Both provinces cover about half of Canada's population. For the other provinces the prescribed rate is set annually by the relevant tenancy board and is usually very close to zero in the current low-rate environment, so SQRFT recommends verifying the current rate directly at the authoritative source rather than relying on an in-app calculation that could drift out of date between rate updates.

Editor verification policy

The rate schedules and rule summaries below carry an "as of 2026-07-03" marker. This is the date SQRFT last confirmed the rules against each province's authoritative source. If you are reading this after that date, verify the current rate against the source link before relying on a calculation for a real dispute. Rules change: Ontario's 2026 rent-increase guideline is a good example that requires annual confirmation.

Use this at end of tenancy or any time you need to compute or verify deposit interest:

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  As a tenant.Verify the interest calculation your landlord provides on the deposit refund statement.
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  As a landlord.Compute the interest you owe when refunding a deposit. Legally required in most provinces even if the rate is currently near zero.
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  For dispute proceedings.Bring the calculation as evidence at Alberta RTDRS, Ontario LTB, BC RTB, or the equivalent provincial tribunal.
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  For long tenancies that span multiple rate periods.The calculator applies the correct rate to each historical window for Alberta and Ontario.

Every province requires the landlord to return the deposit within a specific timeline after tenancy ends (usually 10 to 15 days) with an itemized statement of any deductions and interest owed.

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  Print or export the calculation.Attach to your written notice to the landlord.
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  File a tribunal application if the deposit is unfairly withheld.Filing fees vary by province ($75 in Alberta, similar range elsewhere).
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  Read the SQRFT city rental guide.Provincial rules also apply within cities; see the SQRFT guide for the tenant's rights in your specific city.
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  Verify the rate at the authoritative source.Especially for BC, MB, SK, NS which change more frequently than Alberta.

• Rate schedules verified as of 2026-07-03. Editors: re-verify against province source before shipping in-year updates.
• Alberta Regulation 89/2006 (King's Printer)
• Ontario LTB Rent Increase Guidelines
• BC Residential Tenancy Branch
• Tribunal administratif du logement (Quebec)
• Manitoba Residential Tenancies Branch