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Rental property vacancy rate calculator

Calculate physical vacancy rate, lost rent, effective rental income, and turnover-related vacancy costs for one or more units.

  • USD inputs · transparent calculation assumptions
  • Instant updates as inputs change
  • Data is calculated in this browser only
USD inputs · transparent calculation assumptions
Your scenario
Updates as you type
Effective annual rental income$27,967.12
Physical vacancy rate
4.11%
Gross potential rent
$30,000.00
Rent lost to vacancy
$1,232.88
Turnover repair and advertising
$800.00
Total vacancy impact
$2,032.88
Property units
1
Calculation notes

Understand the Rental property vacancy rate calculator

The Rental Property Vacancy Rate Calculator validates every input, normalizes monthly and annual amounts, and calculates physical vacancy, lost rent, effective income, and turnover costs from one consistent scenario.

Formula and logic

How does the Rental Property Vacancy Rate Calculator calculate physical vacancy, lost rent, effective income, and turnover costs?

Physical vacancy v = vacant days per unit / 365. Potential rent G = monthly rent × 12 × units. Lost rent = G × v. Effective annual income here = G × (1−v) − units × (turnover repairs + advertising). All units are assumed to share the entered vacancy days.

Worked example

What does a worked Rental Property Vacancy Rate Calculator example show?

Two units at $1,800 per month yield $43,200 potential rent. With 30 vacant days per unit, vacancy is 8.22% and rent loss is about $3,550.68. At $500 repairs plus $100 advertising per unit, effective income is about $38,449.32.

How to read the result

How should I interpret the Rental Property Vacancy Rate Calculator results?

  • This output deducts entered turnover costs as well as lost rent, so it is not NOI.
  • Use unit-days if units have different vacancy durations instead of treating all units identically.
Limits and assumptions

Which costs, rules, or risks are outside the Rental Property Vacancy Rate Calculator?

  • Assumes a 365-day year and prorated rent. Concessions, unpaid rent, multiple turnovers and ongoing property expenses are not fully represented.

Content and calculation reviewed:

Understand the calculation

How to use it and the math behind it

Read the complete explanation

Four steps to check your inputs and results

  1. Confirm currency and monthly versus annual amounts. U.S. tax and loan models should be used within their stated scope.
  2. Prepare Property type, Monthly rent per unit, Vacancy days per year, Number of units, Turnover repair costs, Re-advertising costs. Defaults demonstrate the model rather than your personal circumstances.
  3. Check the headline result and its components. A key interpretation for this tool is: This output deducts entered turnover costs as well as lost rent, so it is not NOI.
  4. Compare the baseline with a changed scenario: Use unit-days if units have different vacancy durations instead of treating all units identically.

A cash-flow waterfall and scenario sensitivity

Income and costs form successive layers. Subtracting financing before computing NOI changes the definition and distorts cap-rate comparisons. Principal repayment uses cash but can also build equity, so a tax profit, operating profit and cash-flow result may legitimately differ.

Effective income = potential income × (1 − vacancy)
NOI = effective income − operating expenses
Cash flow = NOI − debt service
DSCR = NOI / debt service

The detailed guide adds variable definitions, a reproducible example, a practice question and model limitations.

Keep calculating
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