The direct answer
Rental-property delinquency rate measures unpaid scheduled rent relative to the rent that was due for a defined period. A common dollar-based version is delinquent rent divided by scheduled rent due. Because late payments can later be collected, delinquency should be tracked separately from permanent bad debt and from physical vacancy.
Define the numerator and denominator consistently
Choose a period such as month-to-date or month-end and decide whether the numerator includes all unpaid balances, only current-period arrears or balances past a stated number of days. Use the same definition every period so the trend is comparable.
To apply the approach to an editable scenario, use the Prorated Rent Calculator. For the neighboring question, explore Rental Property Cash Flow Calculator.
Connect delinquency to cash flow
Scheduled rent can make a property look healthy while cash collections lag. Underwriting should distinguish contractual revenue, actual collections and eventual write-offs because each affects liquidity differently.
Watch concentration as well as the headline rate
A 5% delinquency rate spread across many tenants can behave differently from the same rate caused by one large tenant. Review tenant concentration, aging and payment history before drawing conclusions.
Worked example
If $50,000 of rent was due during the month and $3,000 remained unpaid at the measurement date, the simple delinquency rate is 6%. If $2,000 is collected the following week, the ending delinquent balance and the eventual bad-debt amount can be lower.
Common mistakes and limitations
Do not use delinquency rate as a synonym for vacancy or bad debt. A delinquent occupied tenant, a vacant unit and a written-off receivable are different economic events.
Lease terms and state/local law may specify a different proration convention; calculator does not determine legal entitlement.
Frequently asked questions
How do you calculate a simple rent delinquency rate?
Divide unpaid rent for the defined period by scheduled rent due for the same period, using a consistent measurement date.
Is delinquent rent always a permanent loss?
No. Some late balances are collected later, so delinquency should be tracked separately from write-offs.
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.
- IRS — Publication 527 (2025), Residential Rental PropertyRental income and expense concepts; operating/rental expense context.
- Office of the Comptroller of the Currency — Comptroller's Handbook — Commercial Real Estate LendingNOI, direct capitalization, cap-rate valuation and DCF concepts for commercial real estate.
Read our editorial policy for the scope of these educational methods.