The direct answer
Security deposits are generally tenant funds held subject to lease terms and applicable law, not ordinary rental income simply because cash was received. Financial modeling should keep refundable deposits separate from operating revenue and recognize that tax and legal treatment can change when amounts are retained or applied.
Separate deposits from rent in cash-flow reporting
A refundable deposit increases cash held but normally creates an obligation to return or properly apply it. Treating it as recurring operating income can overstate NOI and distributable cash.
To apply the approach to an editable scenario, use the Prorated Rent Calculator. For the neighboring question, explore Rent Increase Calculator.
Track permitted deductions and refunds
Jurisdictions can regulate deposit limits, holding, notices, itemization, deadlines and permissible deductions. Use the rules for the property location and maintain records supporting any amount withheld.
Apply tax treatment to the actual arrangement
For U.S. federal tax purposes, IRS guidance distinguishes refundable security deposits from amounts intended to serve as final rent. If a deposit is retained because a tenant does not meet lease obligations, the tax treatment can change. Confirm current IRS guidance and professional advice for the facts.
Worked example
A landlord receives $2,000 as a refundable deposit and $2,000 first-month rent. A cash ledger shows $4,000 received, but an operating-income model should not automatically treat all $4,000 as rental revenue because the deposit may have to be returned.
Common mistakes and limitations
Do not assume a security deposit is income at receipt or that it can be withheld for any turnover cost. Legal and tax rules depend on the jurisdiction and facts.
Lease terms and state/local law may specify a different proration convention; calculator does not determine legal entitlement.
Frequently asked questions
Is a refundable security deposit rental income when received?
Generally not for U.S. federal income-tax purposes when there is an obligation to return it, but the facts and later disposition matter.
Can deposit rules vary by state or city?
Yes. Deposit limits, handling and refund procedures can be jurisdiction-specific.
Sources and further reading
The article’s examples are illustrative arithmetic. The references below provide context for operating, valuation or transaction concepts; they do not endorse the assumptions or the calculator.
- GovInfo / HUD — 24 CFR §880.608 — Security deposits (federal housing program example)Program-specific example referencing state/local deposit requirements; not a national interest-rate rule.
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