What Is a Security Deposit, Exactly?

A security deposit is money you pay a landlord at the start of a tenancy as a cushion against the three things a landlord fears: unpaid rent, damage beyond normal wear, and a tenant who disappears mid-lease. It is your money the whole time you live there — the landlord is only holding it — and state law treats it that way, which is why deposits come with rules about caps, interest, and deadlines that ordinary payments do not have.

What the deposit can legally be used for

State laws vary in the details but converge on a short list: unpaid rent, the reasonable cost of repairing damage beyond normal wear and tear, cleaning to the standard the tenant received the unit in, and — in most states — other losses the lease expressly says the deposit covers, like a broken lease fee. A landlord cannot use your deposit to renovate, upgrade, or bill you for depreciation on things that were already old. That is what wear and tear means, and nearly every state writes the phrase into its statute.

A deposit is not the same as last month's rent

The two get confused because they are often the same amount. But last month's rent is prepaid rent — the landlord can simply apply it to your final month — while a deposit is held against possible losses and must come back to you if nothing is wrong. Some states treat the two so differently that they even earn interest differently: in Massachusetts, for example, both the deposit and prepaid last month's rent earn interest, on different schedules. Label your payments correctly at the start, in writing, so there is no argument later.

It is not a fee, either

Application fees, administrative fees, and pet fees are usually paid and gone — they buy a service and do not come back. A deposit is the opposite: it comes back unless it is lawfully spent. Some states cap one and not the other; several limit non-refundable fees by requiring them to be called out as non-refundable in the lease. If a payment's fate is "it depends on how you leave", it is a deposit, and it gets deposit-law protection.

Who holds the money — and who earns the interest

In most states the landlord can keep the deposit in an ordinary account, but a growing list of states treat it more like a trust: Massachusetts requires an escrow account in a Massachusetts bank, North Carolina requires bonding or escrow, and big-building deposits in New York City must sit in an interest-bearing New York bank account. Whether the interest is yours depends on where you live — states including Ohio, Florida, New Jersey, Connecticut, Illinois (in Chicago) and a handful of others require some or all of it to be paid to you, with rates set by statute or by an annual state announcement. The state pages on this site list each rule, and the calculator turns the rate into a dollar figure.

How much can a landlord charge?

Roughly a third of states cap deposits, usually at one to two months' rent — California at one month, Arizona at one and a half, Nevada at three — while the rest let the lease set the number. Caps come with exceptions worth reading: California's one-month cap arrived with its 2024 law AB 12, several states allow half a month more for pets or furnished units, and Maryland lets counties tighten the state rule.

When do you get it back?

Every state sets a return deadline that starts when you give up possession — usually the day you return the keys. The range runs from 14 days (New York, Arizona, Hawaii) to 60 (West Virginia, Arkansas in most cases), with 21 to 30 days the most common. Many states also require an itemized written statement of any deductions, and several attach double or triple damages when landlords blow past the deadline in bad faith. The deadline is the single most useful number in deposit law: mark it on your calendar the day you turn in the keys.

Is a returned deposit taxable income?

No. Getting your own deposit back is not income — the money was always yours. But a deposit the landlord keeps becomes different things for tax purposes: applied to unpaid rent or damage, it is income to the landlord; and if you deducted it as a moving expense in the narrow cases where that was ever allowed, a kept deposit can complicate an old return. For almost everyone the answer is simple: refunds are not taxable, and forfeitures are.