Where do I have to keep a security deposit?

The core question is whether your state forces you to segregate the money. A number of states require a dedicated account that holds only tenant deposits, kept apart from your operating and personal funds. Others impose no such duty and let you deposit it wherever you want.

Some states also make you name the bank or disclose the account to the tenant in writing at move-in. Rules vary widely, so verify your specific obligations in the state law guide and confirm them with local counsel before you collect a dollar.

A subset of states treat the deposit as the tenant's money and require an interest-bearing or escrow account. In those places you may owe the tenant accrued interest, sometimes paid yearly and sometimes returned at move-out.

Details differ on the rate, who keeps any administrative allowance, and how often interest is paid. Do not assume a neighboring state's rule applies to yours. Read the current requirement for the exact property location before you open the account.

If your state has no rule, best practice still says do not commingle. Mixing deposits with rent or personal cash makes it far harder to prove the money was always there and available to return.

• Open one account that holds tenant deposits only.
• Never spend deposit funds on repairs or bills during the tenancy.
• Log every deposit received and every deduction with dates and amounts.

Where you keep the deposit matters less if you cannot show what happened to it. Keep the signed lease clause, the move-in condition report, receipts for any deductions, and a clean ledger of the account. Good records turn a contested return into a short, factual conversation instead of an argument. If a tenant ever challenges a deduction, the paper trail, not your memory, is what settles it.