Montana Commercial Security Deposit Laws

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

Unlike the heavily regulated residential sector (where missing a 10-day deadline can result in double-damages lawsuits), Montana has virtually no specific statutes governing commercial security deposits.

In Montana commercial real estate, the rules regarding how much a landlord can demand, how they store it, and when they return it are dictated exclusively by the written commercial lease agreement negotiated between the two parties.

1. No Statutory Limits on Amount

Montana law does not cap the maximum amount a landlord can charge an incoming commercial tenant for a security deposit.

• Most standard commercial leases in Montana require a deposit equal to one or two months' base rent.
• For specialized build-outs, high-risk restaurant ventures, or tenants with unproven financial histories, landlords frequently demand amounts equal to three to six months' rent, or require an irrevocable Letter of Credit from the tenant's bank.

2. No Escrow or Interest Requirements

In a major departure from some jurisdictions, Montana commercial landlords enjoy complete freedom in how they hold deposited funds:

• Commingling Allowed: Commercial landlords are not legally required to hold security deposits in separate, dedicated escrow or trust accounts. Unless the lease specifically prohibits it, a Montana commercial landlord can commingle the deposit with their own general operating funds.
• No Mandatory Interest: Landlords are not required by state law to place the deposit in an interest-bearing account, nor are they legally obligated to pay the tenant any accrued interest at the end of the lease. (If a massive deposit is held for a 10-year lease, the landlord typically keeps the interest yield unless the tenant successfully negotiated an "interest-bearing" clause into the contract).

Unless explicitly agreed to otherwise in writing, the landlord merely owes the tenant the sum originally deposited at the satisfactory conclusion of the lease.

3. Deposit Return Timelines and Deductions

The strict Montana residential return deadlines (10 days if no deductions, 30 days if deductions) do not apply to commercial tenancies.

The timeline for exactly when the landlord must perform a final walk-through, generate an itemized list of deductions (for things like unpaid CAM charges, physical damage beyond normal wear and tear, or uncompleted "make-good" lease obligations), and return the remaining funds is dictated purely by the lease clause.

• Standard Practice: A well-drafted commercial lease in Montana typically grants the landlord 30 to 60 days after the tenant completely vacates the premises, surrenders the keys, and the final CAM (Common Area Maintenance) reconciliation is calculated for the year, to process the final deposit return.

See our Commercial Lease Requirements guide.

How Landager Helps Commercial Landlords in Montana

Because Montana law places zero restrictions on commercial security deposit timelines, every single lease in your portfolio might have a completely different, customized deadline for returning funds. Landager replaces manual spreadsheet tracking by digitizing your lease clauses. The second your leasing team marks a Montana commercial tenant's status as "Vacating," Landager automatically reads the specific deposit return timeline embedded in that tenant's individual contract (e.g., "return within 45 days of surrender") and triggers automated alerts to your accounting department 10 days before the deadline, ensuring you never inadvertently breach a contract.

Back to Montana Commercial Landlord-Tenant Laws Overview.