Finance category
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Vacancy Rate Calculator
Measure how often your rentals sit empty and how much rent you are leaving on the table. Calculate both physical vacancy and economic vacancy so you can see the full impact on cash flow.
Physical vacancy
Measures how often units were empty over the period tracked.
Economic vacancy
Compares gross potential rent with rent actually collected. Captures concessions, delinquency, and loss-to-lease.
Physical vacancy rate
4.17%
Occupancy rate
95.83%
Rent lost to vacancy
$3,700
Economic vacancy rate
7.55%
What the vacancy numbers tell you
Vacancy is in the typical underwriting range many lenders and investors use for stabilized rentals.
Total unit-months
48
Economic loss (annual)
$6,700
Collection ratio
92.5%
Physical vacancy = vacant unit-months ÷ total unit-months. Economic vacancy = (gross potential rent − collected rent) ÷ gross potential rent, which also picks up concessions, delinquency, and loss-to-lease that a pure occupancy number can hide.
EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.
Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.
Learn more about our review process on the EveryCalc methodology page.
How this calculator works
What this page estimates
This Vacancy Rate Calculator is built to give a quick, browser-based estimate for vacancy rate. Measure how often your rentals sit empty and how much rent you are leaving on the table. Calculate both physical vacancy and economic vacancy so you can see the full impact on cash flow. The inputs stay on the page during normal use, and the result should be treated as an estimate for planning, comparison, or education rather than professional advice.
Calculation approach
The calculator applies the standard relationship implied by the inputs, then formats the answer so it can be checked and reused. For finance tools, the most important step is using consistent units, rates, time periods, and assumptions before comparing the result with another calculator or outside quote.
Example workflow
For example, start with a realistic value you already know, change one input at a time, and watch how the answer moves. That makes it easier to tell whether the result is being driven by the main amount, the rate, the time period, or a unit conversion.
Practical checks
- Use current, real-world numbers when the result affects money, health, tax, or legal decisions.
- Run a low, base, and high case when the inputs are estimates.
- Check the related calculators below when the next decision depends on a different assumption.
How to interpret the vacancy rate result
Best use
Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.
Cross-check
Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.
Watch for
Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.
This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.
Before relying on this vacancy rate estimate
Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.
Confirm source numbers
Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.
Separate cash flow from total cost
A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.
Run conservative cases
Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.
Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.
How to Use
- Enter the total number of units in the property or portfolio and the number of months you are measuring over.
- Add the number of unit-months vacant during that window — one unit empty for three months is three unit-months.
- Include average monthly rent so the calculator can translate vacant time into dollars lost.
- For economic vacancy, enter gross potential rent and rent actually collected to capture concessions and delinquency.
- Use the resulting physical and economic vacancy rates when underwriting cap rate, cash flow, and DSCR.
Frequently Asked Questions
What is the difference between physical and economic vacancy?
Physical vacancy measures time with no tenant. Economic vacancy measures the rent you would have collected if every unit were fully paying market rent. Economic vacancy also captures concessions, delinquency, and loss-to-lease.
What is a typical vacancy rate?
Stabilized single-family and small multifamily rentals in strong markets often run 4–7% physical vacancy. Workforce housing, higher-turn markets, or older assets may underwrite at 8–12%. Lender underwriting usually floors vacancy at 5–7% even when history is lower.
How do I calculate unit-months vacant?
Add up the months each unit was empty during the measurement period. For example, one unit vacant 1 month plus another vacant 2 months is 3 total unit-months vacant, regardless of portfolio size.
Why does economic vacancy matter for underwriting?
A property can be 100% physically occupied while collecting well below market rent because of concessions, delinquency, or renewal discounts. Economic vacancy is the metric that reveals that gap and keeps cash flow projections honest.
How should I use the vacancy rate from this calculator?
Feed the higher of your historical rate and a conservative market-standard rate into cap rate, cash flow, and DSCR calculators so the deal math stays defensible if the market softens.
Related Calculators
Rental Cash Flow Calculator
Apply your vacancy assumption inside a full monthly rental cash flow build-up.
Cap Rate Calculator
Bake vacancy into NOI and see how it moves cap rate on a property.
Cash-on-Cash Return Calculator
See how higher vacancy compresses leveraged return on the actual cash invested.
DSCR Calculator
Pressure-test whether NOI after vacancy clears lender minimums on the rental loan.
Rent Roll Vacancy Gap Calculator
Expand vacancy into six leakages — loss-to-lease, downtime, concession, bad debt, non-revenue units.
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