Security deposits are not income when you receive them. They belong to the tenant until they move out, so they’re a liability on your balance sheet. Getting this wrong creates tax problems and makes your financial statements misleading.

When a tenant pays a security deposit, record it to a liability account called something like “Security Deposits Payable” or “Tenant Security Deposits.” The deposit hits your bank account as a debit and the liability account as a credit. Your income statement stays untouched because you haven’t earned anything yet.

California has specific rules about security deposits that landlords need to follow. Even when not legally required, keeping deposits in a separate bank account prevents you from accidentally spending money that isn’t yours. It also makes reconciliation simpler when tenants move out and you need to return funds quickly.

When a tenant moves out and you return the full deposit, reverse the original entry. Debit the security deposit liability and credit your bank account. Your books now show you no longer owe that money and no longer have it in the bank.

Partial forfeitures require a split entry. Say a tenant paid $2,000 and you’re keeping $600 for damages. Debit the security deposit liability for the full $2,000. Credit your bank account for the $1,400 you’re returning. Credit an income account for the $600 you’re retaining. That $600 is now taxable income because you’ve earned it.

Track deposits by tenant and property in your accounting software. A single lump-sum security deposit account doesn’t tell you how much you owe any specific person. When someone disputes the amount you returned, you need records showing exactly what they paid and any deductions you made. Real estate investors with multiple properties should be able to see deposit balances by unit at any time.

The common mistake is recording deposits as income when received. This inflates your profit, creates a tax liability on money you might have to return, and understates what you actually owe. If you’ve been handling deposits this way, your books need cleanup before year-end to avoid overpaying taxes.

For landlords managing several properties, a San Diego bookkeeper familiar with rental accounting can set up your chart of accounts correctly and make sure deposits flow to the right places automatically. The initial setup takes some thought, but once it’s right, tracking deposits becomes straightforward.