Illinois Commercial Security Deposit Laws

Unlike the rigid regulations surrounding residential deposits, Illinois commercial security deposits operate within a statutory vacuum. The state views commercial tenants as sophisticated entities capable of negotiating their own terms, leaving the security deposit almost entirely up to the lease agreement.

Disclaimer: This guide provides general legal information for educational purposes only and does not constitute legal advice. Always consult a licensed attorney in Illinois for advice specific to your situation. Information last verified: March 2026.

No Statutory Deposit Limits

In Illinois, there is no state law dictating how much a landlord can demand for a commercial security deposit.

• While residential deposits are often capped at 1.5 months' rent by local ordinances (e.g., in Chicago or Evanston), those caps do not apply to commercial properties.
• A commercial landlord may request any amount necessary to secure the risk of the tenancy. Common requests range from one month's rent up to six months' rent, depending on the tenant's creditworthiness, the nature of the business, and the extent of tenant build-outs.

No Statutory Holding Requirements

Illinois does not require commercial landlords to:

• Hold the security deposit in a separate or trust account.
• Hold the security deposit in an interest-bearing account.
• Pay the tenant any interest earned on the deposit during the lease term.

The funds can generally be commingled with the landlord's operating funds unless the lease specifically prohibits it.

The Return Process and Deadlines

The residential deadline of 30 or 45 days for returning a security deposit does not apply to commercial leases. Instead, the precise timeline for returning the deposit must be delineated in the lease.

If the lease is entirely silent on a return deadline, general contract principles apply. The landlord is expected to return the balance within a "reasonable" time frame after the lease terminates and possession is surrendered. However, relying on a vague "reasonable" standard often invites litigation.

Deductions

A commercial landlord is generally entitled to deduct funds from the deposit to cover:

• Unpaid base rent and unpaid additional rent (e.g., CAM charges, property taxes).
• Costs to repair the property beyond normal wear and tear.
• Costs incurred if the tenant abandons the property.
• Any other specific damages outlined within the lease agreement.

Under the Security Deposit Return Act (765 ILCS 710), a landlord may still be required to provide an itemized statement of property damage deductions.

Alternatives to Cash Deposits

Because commercial cash deposits can tie up significant capital, businesses often negotiate alternatives. Landlords should be prepared to accept:

• Letters of Credit (LOC): An irrevocable guarantee from a bank that the landlord can instantly draw against if the tenant defaults. This is highly preferred by commercial landlords, as the funds exist entirely outside the tenant's potential bankruptcy estate.
• Corporate or Personal Guaranties: A legally binding promise from a parent corporation or the business owners themselves to personally cover any default.

Best Practices for Commercial Landlords

Commercial landlords should protect themselves by embedding explicit terms in the lease. Always state clearly:

1. The amount of the deposit.
2. Under what exact conditions the landlord can draw from the deposit.
3. A requirement that the tenant replenish the deposit if funds are drawn down mid-lease.
4. The exact timeline for returning the deposit post-termination (e.g., 60 or 90 days after lease expiration).

How Landager Helps

Landager’s commercial dashboard allows you to record whether a lease is secured by a cash deposit or a Letter of Credit. By tracking the exact lease terms digitally, Landager automatically reminds you of the bespoke return deadlines negotiated in your commercial contracts.

Back to Illinois Commercial Landlord-Tenant Laws Overview.