Security Deposit Calculator - Rental Flow
Landlord Calculator

Security Deposit Calculator

Quickly work out a recommended security deposit as a multiple of monthly rent, then check it against your state's legal limits.

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Opens live in the Rental Flow app, no account needed.

What this calculator does

Most landlords set a security deposit as a simple multiple of monthly rent, often one to two months' rent. This calculator multiplies your rent by whatever multiplier you choose, so you can quickly compare options like 1x, 1.5x, or 2x rent.

The formula

Recommended Deposit = Monthly Rent × Deposit Multiplier

Important: many states cap security deposits by law, some at one month's rent, others at two or more, and some have different rules for furnished units. Always check your state and local regulations before setting a deposit amount; this calculator does not apply any legal caps.

Worked example

$1,500/month rent, 1.5x multiplier

Monthly rent$1,500
Deposit multiplier1.5x
Recommended deposit$2,250

How much should a security deposit be?

A common practice is to set the security deposit at one to one and a half times the monthly rent, though many states cap the maximum you can collect. The deposit protects you against unpaid rent and damage beyond normal wear, while staying low enough not to deter good applicants.

Always check your local rules before setting an amount, since some jurisdictions limit the deposit, dictate where it must be held, and set strict deadlines for returning it. This calculator gives you a starting figure; local law sets the ceiling.

Try it with your own numbers →

Frequently asked questions

One month is the most common, with many landlords going up to one and a half months for higher-risk applicants or premium units. Some states cap the maximum, so the legal limit in your area may set the ceiling regardless of what you would prefer to charge.
Yes, in many places. Some states cap deposits at one or two months rent, require the money to be held in a separate account, and set deadlines and itemization rules for returning it. Always confirm your local law before deciding on an amount.
A deposit generally covers unpaid rent and repair of damage beyond normal wear and tear. It is not meant to cover ordinary wear, like minor carpet wear or fading paint. Document the unit's condition at move-in and move-out to support any deductions.
Most jurisdictions require return within a set period after move-out, often 14 to 30 days, along with an itemized list of any deductions. Missing the deadline can carry penalties, so know your local timeline and keep clear records of any charges.