When a rent deduction is (and isn’t) proper
Yes. Unpaid rent is one of the specific, lawful reasons a landlord may deduct from your security deposit in California. If you genuinely owe rent when you move out, the landlord can generally apply your deposit to that amount.
However, this must still be handled properly. The landlord has to account for the deduction in the itemized statement and return any remaining balance within the required time. And the rent claimed must actually be owed — a landlord cannot invent or inflate rent charges to justify keeping your deposit.
There are also situations where you may not owe the rent the landlord claims — for instance, if you lawfully withheld rent over serious habitability problems, or if the landlord failed to properly credit payments. In those cases, a rent-based deduction may be improper.
So while unpaid rent is a valid reason to use a deposit, whether the specific charge is legitimate depends on the facts. If your landlord kept your deposit for rent you do not believe you owe, a free, confidential review can help you understand whether the deduction was proper.
This is general information about California tenant rights, not legal advice. Every situation is different.