Humble Vacancy · Estimate
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Enter your unit counts and monthly rent, then calculate.
Estimated monthly lost rent
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A simple estimate based on vacant units × average monthly rent.
Total units —
Vacant units —
Average rent / unit — Formulas: Vacancy rate = vacant units ÷ total rental units × 100. Estimated monthly lost rent = vacant units × average monthly rent per unit.
Example: 2 vacant units out of 20 total units gives a 10% vacancy rate. At $1,200 average monthly rent, estimated monthly lost rent is $2,400.
Note: This simplified estimate assumes a full month of lost rent for each vacant unit at the average rent entered. Scenario comparisons use the same rent for each case and annualize the monthly amount by multiplying by 12. They don't model lease-up timing, seasonality, partial months, rent differences, concessions, other income, or expenses.
What to verify next The numbers above are planning estimates built from the amounts you entered. These are checks for you to complete with local quotes, documents, and qualified professionals — they are not advice, verified quotes, or confirmed terms.
Confirm the total and vacant unit counts for the same date or measurement period. Check the average rent assumption against current leases or local comparable rentals. Adjust for partial-month vacancy, concessions, or different unit rent levels if relevant to your scenario. Compare the estimate with your rent roll and operating records; verify local requirements with qualified professionals. Your next step See how vacancy assumptions fit into a broader property cash-flow review.
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Planning estimate only. Vacancy is measured using the counts and monthly rent you enter and may not reflect market vacancy or actual collected rent. Not investment, financial, legal, or tax advice.