Five security deposit rules landlords get wrong

1. Taking more than your state allows

Most states cap what you can collect up front, usually somewhere between one and two months' rent, and the cap often counts everything you charged: the deposit, the pet deposit, the last month's rent you asked for in advance, sometimes even a non-refundable cleaning fee.

Going over the cap rarely ends with a polite request to return the difference. In several states the penalty is two or three times the overage, plus the tenant's legal fees. Add up every dollar you are holding before the tenant moves in, not after they move out.

2. Mixing the deposit with your own money

The deposit is not income and it is not yours yet. A number of states require it to sit in a separate account, some require that account to be interest-bearing, and some require you to tell the tenant in writing where it is being held within a set number of days of move-in.

Even where no rule applies, a separate account is the cheapest insurance you can buy. When a judge asks whether the money was ever really set aside, a dedicated account answers the question in one line.

3. Missing the move-out clock

Every state gives you a deadline to return the deposit or send an itemized list of deductions. It is commonly 14 to 30 days from the end of the tenancy, and it runs whether or not you have finished the repairs, gotten the contractor's invoice, or heard back from the tenant about a forwarding address.

Blowing the deadline can forfeit your right to deduct anything at all — including damage the tenant genuinely caused. If a repair estimate is still outstanding, send the itemization on time with a good-faith estimate and note that a final invoice will follow.

4. Charging for normal wear and tear

You can deduct for damage. You cannot deduct for the property getting older while somebody lived in it. Faded paint, worn carpet traffic lanes, small nail holes, loose door handles, and a tired kitchen floor after three years are the cost of being in the rental business.

The practical test is whether the item wore out on schedule or was broken. A carpet with a burn is damage. The same carpet flattened after five years is wear. Carpets, paint, and appliances also depreciate: deducting the full replacement cost of an eight-year-old carpet is the classic way to lose an otherwise winnable dispute.

• Damage: broken tiles, pet urine in the subfloor, holes in drywall, a cracked window, missing fixtures.
• Wear: scuffed baseboards, minor carpet wear, sun-faded blinds, small picture hooks, grout that needs cleaning.

5. Sending a number instead of an itemization

"Deposit withheld for cleaning and damages — $1,200" is not an itemization, and in most states it does not satisfy the statute. You need line items: what was wrong, what it cost, and ideally a receipt or written estimate for each one.

Pair the itemization with dated move-in and move-out photos and a signed inspection checklist. Landlords who lose deposit cases almost never lose because the damage was imaginary. They lose because they could not prove what the unit looked like the day the tenant got the keys.

What to do this week

Look up three numbers for your state and write them on the inside of your lease file: the deposit cap, the return deadline, and whether a separate or interest-bearing account is required. Then build one move-in inspection checklist, photograph every room before the next tenant arrives, and keep the file for the life of the tenancy plus the statute of limitations.

Those three numbers and one checklist prevent the overwhelming majority of deposit disputes.