Security Deposits and Prepaid Rent in Commercial Leases: What Tenants Should Know

Security Deposits and Prepaid Rent in Commercial Leases: What Tenants Should Know

A security deposit and prepaid rent look almost identical on the day you sign a lease, you write a cheque before you move in. Legally, they are not the same thing, and the difference can matter a great deal if your landlord (or your own business) ever runs into financial trouble.

Security Deposit vs. Prepaid Rent, Why the Label Matters

A security deposit is money a landlord holds as security for a tenant's performance of its lease obligations. In principle, it still belongs to the tenant, the landlord just has a right to draw on it if the tenant defaults, and to return whatever is left at the end of the term (or the end of the security period specified in the lease).

Prepaid rent is different. It's rent paid in advance, applied to specific months of the term. Once it's paid, it's generally treated as the landlord's money, there's no expectation it comes back to the tenant.

The label your lease uses for this payment isn't just paperwork. Alberta courts have had to decide, in real disputes, which one a payment actually was, because the answer determines who has a legal claim to the money when something goes wrong.

The leading example is the Alberta Court of Appeal's 2015 decision in Alignvest Private Debt Ltd. v. Surefire Industries Ltd. A landlord held a large deposit from a tenant, described in the lease as a "Security Deposit," to be applied against specific future rent payments after the first year. When the tenant went bankrupt with no rent arrears outstanding, a secured creditor of the tenant argued the deposit was still the tenant's asset, not the landlord's, and should be handed to the tenant's estate. The landlord argued the opposite: that the payment was, in substance, non-refundable prepaid rent and therefore belonged to it outright.

The court sided with the creditor. It looked past the landlord's argument that it would "always" end up with the money, and focused on the actual clause: it was titled "Security Deposit," treated as distinct from "Advance Rent" elsewhere in the lease, and the landlord itself had never drawn on it when rent was previously late. Because the deposit could, in some circumstances, have been returned to the tenant, it was still the tenant's property, and therefore an asset available to the tenant's creditors, not the landlord's to keep.

Why This Matters Beyond the Bankruptcy Courtroom

Most Calgary tenants will never end up in this exact dispute. But the underlying lesson applies in ordinary lease negotiations too:

• What you're asked to pay up front should say clearly what it is: a refundable security deposit, or non-refundable prepaid rent, and the lease language should match the label consistently throughout.
• If your landlord runs into financial difficulty: a security deposit you paid is still arguably your property, held by a party that may now be insolvent, which can complicate getting it back. Prepaid rent, once applied to a rent period, is simply gone regardless of what happens to the landlord afterward.
• If your own business is the one under financial stress: a security deposit you've paid may be treated as an asset available to your creditors (as in Alignvest), while an irrevocable letter of credit you've provided as security operates differently: it draws on a bank's credit, not yours directly, so its treatment in your own insolvency is a separate question worth asking your lawyer about specifically.

What Typically Gets Negotiated

• Amount: Landlords commonly ask newer or less-established tenants for a deposit equal to one to three months' rent; well-capitalized or long-track-record tenants often negotiate it down or avoid it entirely.
• Form of security: Instead of cash, larger tenants sometimes offer an irrevocable letter of credit from a bank. Landlords generally prefer this because a bank's obligation to pay is more reliable than a cash deposit's legal status in a dispute, and it isn't tied up in the tenant's own insolvency proceedings the way a cash deposit can be.
• Drawdown conditions: When and how the landlord can apply the deposit against a default (only after notice and a cure period, ideally), and whether the tenant must "top it back up" after a draw.
• Return timeline: When any remaining deposit comes back: at lease expiry, after a fixed number of months of on-time payment, or on some other milestone.
• Interest: Whether the landlord owes interest on a cash deposit held over a multi-year term; this is negotiable but not automatic.

Common Mistakes

1. Assuming the label doesn't matter because "it's basically the same money." As Alignvest shows, the label and how it's actually treated in the lease and in practice can determine who legally owns the funds in a dispute, including a bankruptcy.

2. Signing a lease with vague "damage deposit" language and no return mechanics. If the lease doesn't say when and how the deposit comes back, tenants are often left negotiating its return informally at the end of the term, from a position of no leverage.

3. Not asking what form of security is actually cheaper for your business. A letter of credit ties up a line of credit with your bank and usually carries a fee; a cash deposit ties up cash directly. Which is cheaper depends on your own financing costs, worth a real comparison rather than defaulting to whatever the landlord's form lease asks for.

4. Treating a security deposit clause as boilerplate not worth a lawyer's time. Given how much can turn on precise wording, as it did for both sides in Alignvest, this is one of the clauses worth a careful legal read before signing.

Frequently Asked Questions

What's the difference between a security deposit and prepaid rent? A security deposit remains, in principle, the tenant's property held as security and is meant to be returned if there's no default. Prepaid rent is a payment of future rent that becomes the landlord's money once applied, it isn't refunded.

If my landlord goes bankrupt, do I get my security deposit back? It depends on how the lease treats the deposit and where it's held. Because the deposit may still be considered the tenant's asset, you may have a claim, but a landlord's insolvency can still make recovery slow, contested, or partial. This is a question for legal counsel specific to your lease wording.

Is a letter of credit better than a cash deposit? For landlords, a letter of credit is often preferred because a bank's payment obligation is more reliable than a cash deposit's legal status in a dispute. For tenants, it avoids tying up cash directly, but usually comes with a bank fee and reduces available credit elsewhere.

Can a landlord just keep my deposit if I'm a bit late on rent once? Only according to what the lease actually allows, most leases require notice and an opportunity to cure a default before a landlord can draw on a deposit. Review the specific default and cure provisions, not just the deposit clause in isolation.

Does a deposit clause matter for a short-term or coworking arrangement? Yes, though the amounts are usually smaller and the terms simpler. The same principle, know whether what you're paying up front is refundable, applies regardless of deal size.

Next Step

Security deposit terms are one piece of the total cost picture, see how Calgary office rent is actually structured for the rest, or reach out if you want a lease reviewed before you sign.

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This guide reflects general commercial leasing practice and Alberta case law as of September 2026; individual leases vary, confirm specifics with legal counsel before signing or relying on any lease provision described here.