What Investors Need to Know About California's New Security Deposit Limit

If you own rental property in California and haven't updated your lease templates since 2024, there's a good chance you're still asking for more security deposit than the law now allows.

What changed

Assembly Bill 12 took effect July 1, 2024, and significantly reduced how much security deposit a landlord can collect in California. Previously, landlords could charge up to two months' rent for an unfurnished unit and three months' for a furnished one. Under AB 12, the general limit dropped to one month's rent, regardless of whether the unit is furnished. Some exceptions apply for smaller landlords who own a limited number of rental properties — if that might apply to you, it's worth confirming the specific qualifying criteria with your attorney or property manager before relying on it.

Why this matters for your risk exposure

A smaller deposit means less of a financial cushion if a tenant causes damage beyond normal wear and tear or leaves owing back rent. For investors, that shifts more of the risk onto tenant selection and lease structure rather than the deposit acting as a backstop. It's a meaningful change in how much margin for error a landlord has if something goes wrong with a tenancy.

How to adjust your approach

A few practical shifts can help offset the reduced cushion. Tenant screening becomes more important than ever — verifying credit, income-to-rent ratio, rental history, and employment carries more weight when there's less deposit behind the lease. Lease agreements are worth a fresh look to make sure damage and repair clauses are clear and enforceable. Some owners are also exploring renters insurance requirements or damage waiver programs as an added layer of protection, and it's worth having that conversation with your property manager about whether it makes sense for your portfolio.

What hasn't changed

AB 12 doesn't change the underlying rules about what a security deposit can be used for, how quickly it must be returned after move-out, or the itemized accounting landlords are required to provide — those existing requirements are still in effect. It's specifically the maximum amount you're allowed to collect upfront that changed.

The bottom line

If your lease templates or standard practices still reference a two- or three-month deposit, it's worth a compliance check sooner rather than later. Charging more than the law allows isn't just a technical violation — it can create real exposure if a tenant disputes it or a dispute ends up in front of a judge.