California Commercial Security Deposit Laws: Rules and Best Practices

California commercial security deposits are governed by Civil Code § 1950.7, which provides a baseline framework that parties can modify by agreement. Unlike California's strict residential deposit rules, commercial deposits offer significantly more flexibility — but also require careful lease drafting.

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

No Statutory Cap

California imposes no statutory limit on commercial security deposits. Landlords can require whatever deposit amount they deem appropriate based on the tenant's risk profile, the lease term, and the rental rate.

In practice, commercial deposits typically range from one to six months' rent, with higher-risk tenants paying more. Landlords may also accept letters of credit (LOCs), surety bonds, or personal/corporate guarantees as alternatives.

30-Day Return Deadline

Under Civil Code § 1950.7(c), commercial landlords must return the security deposit within 30 days after receiving possession of the premises. This is the default statutory rule.

Important: The 30-day period begins when the landlord receives possession — not when the lease expires. If the tenant holds over, the clock doesn't start until the landlord actually regains the premises.

Permitted Deductions

The landlord may retain the deposit for:

1. Unpaid rent — including rent due for the remaining lease term if the tenant defaults.
2. Repair of damages caused by the tenant (beyond normal wear and tear).
3. Cleaning costs — to restore the premises to the condition required by the lease.

However, there is an important limitation: the lease must specifically authorize each type of deduction. If the lease is silent on a particular use of the deposit, the landlord may not be entitled to make that deduction.

No Itemized Statement Required (by Default)

Unlike residential deposits, California law does not require commercial landlords to provide an itemized statement of deductions. However, your lease may contractually require one, and providing an itemized statement is strongly recommended as a best practice to avoid disputes.

Commingling and Priority

Commercial security deposits may be commingled with the landlord's other funds. However, the tenant's claim for return of the deposit takes priority over claims from the landlord's other creditors (except a trustee in bankruptcy).

No Interest Required

California does not require commercial landlords to hold deposits in interest-bearing accounts or pay interest to tenants on their deposits.

Waiver and Modification

A key difference from residential deposits: parties to a commercial lease can waive or modify the default provisions of § 1950.7. This means:

• The lease can extend the return deadline beyond 30 days.
• The lease can expand or limit the permitted deductions.
• The lease can require the landlord to hold the deposit in a segregated account.
• The lease can require an itemized statement of deductions.

This flexibility makes the lease language critically important — what the statute provides is merely a default.

Best Practices for California Commercial Landlords

1. Specify all deposit terms in the lease — amount, permitted deductions, return timeline, and whether an itemized statement will be provided.
2. Conduct thorough move-in and move-out inspections — even though not required, documentation protects you in disputes.
3. Track the 30-day deadline — or whatever custom deadline your lease specifies.
4. Address CAM reconciliation — if the final NNN reconciliation extends past the deposit return deadline, your lease should allow you to retain a reasonable reserve.
5. Consider LOC provisions — for larger tenants, specify LOC requirements, auto-renewal provisions, and draw conditions.

How Landager Helps

Landager tracks commercial security deposit balances, return deadlines, and lease-specific deduction terms across your portfolio — ensuring you never miss a critical compliance date.

Back to California Commercial Lease Laws Overview.