NJ Security Deposit: Interest-Bearing Account Rules

Yes. In New Jersey, a security deposit can't sit in your personal checking account — it has to be held in an interest-bearing account, and the interest belongs to the tenant, not to you. The deposit itself is capped at 1.5 months' rent, and after the lease ends you have 30 days to return what you owe (5 business days if the tenant is displaced by fire, flood, or an evacuation). The details of which institutions qualify, what you must tell the tenant about the account, and how the interest is calculated and paid out are set by N.J. Stat. §§ 46:8-21.1, 46:8-21.2.

What "interest-bearing" actually means for a small landlord

Two separate obligations are bundled together here, and it helps to keep them apart in your head.

• Where the money sits. The deposit goes into an account that earns interest, held separately from your own funds. It is the tenant's money that you are holding, not revenue.
• Who gets the earnings. Interest is owed to the tenant. You don't keep it as a handling fee.

The statute controls the specifics — the type of institution, the disclosures you have to give the tenant about where the money is, when and how interest is credited or paid, and what happens if you get it wrong. Read N.J. Stat. §§ 46:8-21.1, 46:8-21.2 directly, and our plain-English summary of New Jersey security deposit laws walks through the same ground.

The 1.5-month cap, and how it interacts with rent increases

You cannot collect more than 1.5 months' rent as a security deposit. That's the ceiling at move-in and it stays the ceiling later: yearly increases to the deposit are limited to 10% of the current deposit. So if rent goes up sharply, you can't simply top the deposit up to 1.5 months of the new rent in one jump — the 10% annual limit applies to what you're already holding.

If you're not sure what your number is, run it through our security deposit limit checker before you write the amount into the lease.

A worked example: a $1,600 two-bedroom in New Jersey

Say you rent a two-bedroom for $1,600 a month on a one-year lease starting July 1. Here's how the deposit side plays out, step by step. This is a hypothetical, not a real tenancy.

Step 1 — Setting the deposit amount

The cap is 1.5 months' rent: 1.5 × $1,600 = $2,400. You'd like to ask for two months because the tenant has a dog, but $3,200 is over the line, so $2,400 is the most you can collect as a security deposit. You write $2,400 into the lease. (Pet rent and any separate fees are their own question and are governed by your lease terms and the statute — don't use them as a workaround to get the deposit above the cap.)

Step 2 — Where the $2,400 goes

Before the keys change hands, you open an interest-bearing account to hold the deposit and put the full $2,400 in it. You do not move it into the operating account you use for the roof repair or the water bill. The statute sets out what you must disclose to the tenant about that account and when, so follow it rather than guessing at wording.

Step 3 — Year two, when rent goes up

At renewal, you raise rent to $1,750. The new 1.5-month figure would be $2,625, which is $225 more than you're holding. But the increase to the deposit is limited to 10% of the current deposit: 10% of $2,400 = $240. Since $225 is less than $240, you can collect the $225 and bring the deposit to $2,625. Had the rent jumped to $1,900 instead — a 1.5-month figure of $2,850, or $450 above what you hold — you could only collect $240 that year, bringing the deposit to $2,640.

Any additional deposit you collect goes into the same interest-bearing account as the original $2,400. It's deposit money, so it's treated like deposit money.

Step 4 — Move-out and the 30-day clock

The tenant gives notice and the lease ends. Keys come back on June 30. Your deadline to return the deposit is July 30 — 30 days after the lease ends. You do the move-out walkthrough on July 1 with the move-in photos open side by side, and find a damaged interior door that isn't ordinary wear and tear. The repair invoice is $185.

So the math on what goes back: $2,625 held, minus $185 in documented damage, equals $2,440 in deposit principal — plus the interest that accrued on the account, which belongs to the tenant. You send the payment and an itemized statement before July 30. What may be deducted, how the itemization must look, and exactly how the interest figure is handled are all set by N.J. Stat. §§ 46:8-21.1, 46:8-21.2, so check the text rather than relying on habit.

The piece that saves you here is documentation. Dated move-in and move-out photos tied to a written checklist are what turn "$185 for a door" from an argument into a record — Rentmark's move-in/move-out inspection checklists with photos keep that evidence attached to the lease where you can find it a year later.

If one fact changes: the tenant is displaced

Change one thing in the scenario. Instead of a normal move-out on June 30, a kitchen fire makes the unit uninhabitable and the tenant is displaced on March 12. Now the timeline is much shorter: the deadline is 5 business days, not 30 days. Same cap, same interest-bearing account, same requirement that interest goes to the tenant — but you have days, not a month, to get the accounting done and the money out.

Practically, that means you can't wait on a contractor's final invoice to decide what to deduct. If you're holding $2,625 and the only documented damage is unrelated to the fire, you work from what you can actually substantiate in that window. The statute governs how the shortened clock operates and what triggers it, including evacuation and flood situations.

Other facts that change the picture

If the rent is subsidized

A voucher tenant's share of rent is only part of the contract rent, and the deposit math and program rules interact. Our overview of how the Housing Choice Voucher program works for small landlords covers how that side operates; the New Jersey deposit statute still applies to the deposit you hold.

If your other rental is in another state

Don't carry New Jersey habits across the river or the state line. Massachusetts, for example, has its own escrow structure with different mechanics — see Massachusetts security deposit escrow account rules. Each state's statute stands on its own.

If your lease is silent on the deposit account

A lease that doesn't address the deposit doesn't excuse the account requirement — the obligation comes from the statute, not from your paperwork. Still, it's cleaner to have the deposit amount and handling spelled out in a New Jersey lease agreement that matches what you actually do.

This is general information, not legal advice. For a deposit dispute or an unusual situation, talk to a New Jersey attorney and read N.J. Stat. §§ 46:8-21.1, 46:8-21.2 in full.