A tenancy under a tenancy agreement that specifies the date on which the tenancy ends;

(a) a tenancy on a weekly, monthly or other periodic basis under a tenancy agreement that continues until it is ended in accordance with this Act, and

(b) in relation to a fixed term tenancy agreement that does not provide that the tenant will vacate the rental unit at the end of the fixed term, a tenancy that arises under section 44 (3) [how a tenancy ends];

15 days after the end of the tenancy agreement and when the landlord receives the tenants forwarding address in writing, whichever comes later

One half of the rent for each deposit

It varies from year to year, but from 2009 until 2017 the interest rate on deposits has been zero. Use a deposit interest rate calculator to determine the total amount.