The interest owed on a security deposit: simple interest at rates reset every January 1 and July 1.
Interest owed
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Deposit plus interest
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How this was calculated
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The rules
A security deposit can be at most one month's rent, taken at the start. A pet deposit can be up to half a month's rent.
Interest is the prime rate minus 2% (never below 0%), reset on January 1 and July 1: 2.45% for 2026.
Within 15 days after the later of the tenancy ending and getting the tenant's forwarding address in writing, the landlord must return it with interest or apply for dispute resolution.