Security deposits are not income when you receive them. The money belongs to the tenant until the lease ends and you determine whether any portion is owed to you for damages or unpaid rent. Recording deposits as income overstates your earnings and creates a tax problem because you would be paying tax on money you might have to return.

In your books, security deposits belong on the balance sheet as a liability. When a tenant gives you a deposit, your cash increases and so does your liability to that tenant. The deposit stays there until move-out. If you return the full deposit, both cash and the liability decrease by the same amount. If you keep part or all of it for damages or unpaid rent, the portion you keep converts from a liability to income at that point.

Track each deposit by tenant and property. A single line item called “security deposits” doesn’t tell you much when you need to know how much you owe a specific tenant or what the deposit situation is at a particular property. Your chart of accounts should be set up to handle this level of detail, which is part of why real estate bookkeeping needs some thought upfront.

Many landlords keep security deposits in a bank account separate from operating funds. Some states require this, and a handful require interest-bearing accounts with the interest paid to the tenant. Even where the law doesn’t mandate separation, a dedicated deposit account makes reconciliation cleaner and prevents you from accidentally spending money that isn’t yours to spend. When your operating account and deposit account are combined, it becomes easy to lose track of how much is actually available for expenses versus how much you’re holding for tenants.

State rules vary widely on security deposit handling. Caps on deposit amounts, required timelines for returning deposits after move-out, and documentation requirements all differ by state. If you own property in multiple states, you need to know the rules for each one. Getting this wrong creates legal exposure and unhappy tenants.

For property managers holding deposits on behalf of owners, this becomes part of your trust accounting obligations. You’re managing funds that belong to both property owners and tenants, which requires strict segregation and regular reconciliation. Trust accounting ties the bank balance to the book balance and to every individual ledger, so you always know where the money is and who it belongs to.

The bottom line is that security deposits require their own tracking system. They sit on your balance sheet until they don’t, and the transition from liability to income only happens when you have a legitimate claim to keep the funds. Set this up correctly from the start and you’ll avoid scrambling at tax time or when a tenant disputes their deposit return.

Working with a fractional CFO for real estate or a bookkeeper who understands real estate means your chart of accounts and processes are built to handle deposits properly from day one.