Alberta Security Deposit Rules 2026

Security deposits in Alberta run on a province-specific workflow. The Residential Tenancies Act and the Residential Tenancy Dispute Resolution Service (RTDRS) — alongside the Alberta courts — set what a landlord can collect, how it must be held, and how it is returned or claimed. This 2026 guide gives landlords and property managers the practical framework — anchored to the stable rules, with a reminder to confirm any rate that changes year to year.

The law and body to build around

For Alberta, anchor every deposit policy to the Residential Tenancies Act and the Residential Tenancy Dispute Resolution Service (RTDRS), with Alberta courts as the alternative forum. Multi-province portfolios get into trouble when a team copies a deposit clause, cap, or deadline from another jurisdiction — British Columbia, Ontario, and Alberta each treat deposits differently, and a rule that is correct in one province can be an offence in another.

The first operating rule is to put the province name at the top of every deposit checklist. The second is to separate business judgment (whether a deduction is justified) from legal procedure (how the Act lets you act on it).

What you can collect

The stable Alberta rules to build around:

A security deposit is capped at one month's rent, measured against the rent at the start of the tenancy.
The deposit cannot be increased mid-tenancy — even if rent later rises, the deposit stays fixed at what was collected at the outset.
The deposit must be held in an interest-bearing trust account, separate from the landlord's operating funds.
Deposit interest accrues at a rate set by regulation; confirm the current-year figure before returning any deposit, since that rate is the piece that changes.

Holding and returning the deposit

Alberta is strict on the trust-account and return workflow. The deposit is the tenant's money held in trust, not landlord revenue — it must sit in an interest-bearing trust account, and the accrued interest belongs with it. After a tenancy ends, a landlord generally must, within the statutory window, either return the deposit in full or provide an itemized statement of deductions with any balance owed. A landlord cannot simply keep a deposit without a proper basis; a disputed deduction is decided by the RTDRS or a court.

For managers, the practical file should carry the move-in and move-out inspection reports, the tenant's forwarding address and the date it was received, dated photos, the ledger, the interest calculation, and the itemized deduction statement. That recordkeeping is what turns a business decision into defensible evidence at the RTDRS.

Common mistakes

Avoid charging more than one month's rent, increasing the deposit mid-tenancy when rent rises, holding the deposit outside an interest-bearing trust account, missing the return deadline, keeping a deposit without an itemized statement or a supporting order, skipping the move-in or move-out inspection, or applying last year's interest rate without confirming the current one.

Managing this in software

Your system should cap the deposit at one month of the start-of-tenancy rent, block any mid-tenancy increase to the deposit, flag that the deposit belongs in an interest-bearing trust account, calendar the return deadline from the tenancy-end and forwarding-address dates, store both inspection reports against the deposit, and require an itemized statement before any deduction leaves the system. Treat the deposit return as a compliance event with a second review, not just an accounting entry.

How Proprietio helps

When you mark a unit moved-out, Proprietio calendars the deposit-return deadline for that property's jurisdiction, applies the correct cap on the ledger, and drafts the itemized deduction statement — so a return never slips past the legal window. See how on your portfolio — free rental audit.

Sources

Government of Alberta — Information for landlords and tenants. Confirm the current-year deposit interest rate and return timelines on the official Alberta.ca pages before acting.

⚠️ This is general information, not legal advice. Residential tenancy is provincial — verify with the named tribunal or a local lawyer before acting.