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How to track security deposits on a rental property

By Spruce Sheets · Updated November 14, 2026 · 6 min read

A security deposit is not just another payment in the rent column. It is money you are holding for a tenant, with rules about how you store it, when you can keep it, and when it has to go back. If you mix it with rent, your balances get messy, disputes get harder to answer, and the tax treatment is easy to get wrong. This guide sets out a simple way to track deposits, a worked move-out example, and the IRS rule on when a deposit becomes income.

General information, not legal or tax advice. Deposit limits, interest, where the money must be held, deadlines to return it, and what you may deduct all depend on the state, sometimes the city, and the lease. Those rules change. Check the current law where the property is, or ask a local attorney and a tax professional, before you set, keep or return a deposit.

What a security deposit is (and is not)

In most leases, a security deposit is an amount the tenant pays up front that you hold against unpaid rent, damage beyond ordinary wear and tear, or other amounts the lease allows. It is not rent, and it is not yours to spend as if it were, even if your state lets you keep it in an operating account. If the lease instead calls the payment "last month's rent," it is advance rent, which is a different thing for both bookkeeping and tax.

Before you collect one, confirm three local rules:

1. How much you may charge. Some states cap the deposit (for example, as a number of months' rent).
2. Where you must hold it, and whether interest is due to the tenant.
3. How quickly you must return it after move-out, and what kind of itemized statement you have to send.

A simple deposit ledger

Keep a deposit record per tenant, separate from the running rent balance in the rent ledger. These columns are enough:

Column	What to record
Tenant and unit	Who paid it, and for which property
Date received	The day the money actually arrived
Amount	The deposit, not mixed with first month's rent or fees
Where it is held	Account or escrow, so you can find the money later
Interest, if any	Accrued and paid, when the law or lease requires it
Deductions	Date, reason, and amount of each item you keep
Amount returned and date	What you sent back, and how (check, transfer)
Balance still held	Should be zero once the tenancy is closed

When first month's rent, a deposit and a pet fee arrive in one transfer, split them into three lines on day one. The rent goes to the rent ledger; the deposit goes to the deposit record; a non-refundable fee is recorded as its own charge, not as a deposit.

When a deposit is income — and when it is not

IRS Publication 527 draws a clear line:

• A deposit you intend to return is not income when you receive it.
• If you keep part or all of it because the tenant damaged the property or did not pay rent, include the amount you keep in income in the year you keep it.
• If the payment is last month's rent (advance rent), it is income when you receive it, even if you do not apply it until a later year.

That is why the ledger has to show intent from the start. If you record a deposit as rent, you will overstate income in the year it arrived and have a mess to unwind later. If you keep a deposit at move-out and never book the kept amount as income, you will understate income that year.

A worked move-out example

A made-up tenancy, for illustration only. Monthly rent is $1,800. You received a $2,700 security deposit on 3 May (one and a half months' rent). You planned to return it, so it was not income in May.

The tenant moves out on 31 October and has not paid October rent. After the inspection you have:

Item	Amount
Deposit held	$2,700
Unpaid October rent	$1,800
Damage to a door, beyond ordinary wear and tear	$275
Unpaid utility billed to the owner under the lease	$45
Total deductions	$2,120
Amount returned to the tenant	$580

You send an itemized statement and $580 within the deadline the state requires. In the books:

• The rent ledger already shows $1,800 of October rent due. Applying $1,800 of the deposit to that balance clears it. For tax purposes, the $1,800 you keep for unpaid rent is income in this year (if you had not already included that rent).
• The $275 for damage and the $45 utility are also amounts you keep, so they are income this year. The matching repair bill and utility bill, if you pay them, are expenses in the usual way.
• The deposit liability goes to zero: $2,120 applied, $580 returned.

If the inspection had shown only ordinary wear and tear, you would have deducted the unpaid rent and the utility, returned $855, and still treated the kept $1,845 as income.

Practical rules that prevent disputes

• Do not dip into a deposit for current rent while the tenant still lives there, unless the lease and local law clearly allow it. Once you apply it, the tenant may have no deposit left, and you may have turned it into income sooner than you meant to.
• Photograph the unit at move-in and move-out, and use the same checklist both times. Ordinary wear and tear (faded paint, reasonable carpet wear) is not the same as damage (a broken door, a burned countertop).
• Itemize every deduction with a date, a reason and an amount. A single line that says "cleaning and damages, $900" is how arguments start.
• Watch the clock. California, for example, generally requires the deposit or an itemized accounting within 21 days after the tenant moves out; Texas generally allows 30 days. Missing the deadline can limit what you may keep, depending on the state.
• Pay or credit interest where the law requires it, and record it in the same deposit ledger.

How this fits with the rest of your books

The deposit ledger answers "how much am I holding, and for whom?" Your income and expense bookkeeping answers "what was rent, and what were expenses, this year?" At year end, the deposits you still plan to return should not appear as rental income. The amounts you kept should. A short reconciling list — deposits held at year end, by tenant — is something a tax preparer can use immediately.

The Rent Ledger & Late Rent Tracker is built around a per-tenant ledger with a running balance, so the rent side stays clean while you keep the deposit in its own record.

The example is made up. Income treatment follows IRS Publication 527; return deadlines mentioned are examples from current state statutes and can change. This guide is not legal or tax advice.

Frequently asked questions

Is a security deposit rental income?

According to IRS Publication 527, a security deposit you plan to return is not income when you receive it. It becomes income in the year you keep part or all of it, for example for unpaid rent or damage. If the amount is meant as the last month's rent, it is advance rent and is income when received.

Should a security deposit go in the rent ledger?

Yes, but on its own line, not mixed into the rent balance. A deposit is money you are holding, not a rent payment. Note the date and amount received, where it is held, any interest if the law requires it, later deductions, and the date and amount you return.

How soon must a landlord return a security deposit?

It depends on the state, and sometimes the city or the lease. For example, California generally requires the deposit or an itemized accounting within 21 days after the tenant moves out, and Texas generally within 30 days. Check the current law where the property is, including any interest or separate-account rules.

Keep reading

• Rent ledger template: what to include and how to keep it
• How to track rent payments: a simple system for small landlords
• How to track rental income and expenses in a spreadsheet