Quick answer
Vacancy rate is the percentage of time, units, or rental inventory that is not occupied. For one rental home, owners often think about vacancy as lost days between tenants. For multi-family or portfolios, vacancy may be measured across multiple units.
Vacancy matters because empty time reduces rental income while many owner expenses continue.
How vacancy rate is calculated
For a single property, vacancy can be estimated by dividing vacant days by total days in the period. For example, 18 vacant days in a 365-day year is about a 4.9% vacancy rate.
For multiple units, vacancy can also be measured by vacant units divided by total units.
Why vacancy rate matters
Vacancy reduces gross rental income and can affect cash flow, reserves, and annual owner revenue. A property with strong rent but repeated vacancy may perform worse than expected.
Owners should include vacancy assumptions when estimating rental performance.
Vacancy rate vs physical vacancy
Physical vacancy looks at whether a unit is occupied. Economic vacancy looks at income not collected, which can include concessions, nonpayment, or below-market rent.
Both ideas can matter, especially for multi-family properties.
How owners can reduce vacancy risk
Owners can reduce vacancy risk with realistic pricing, strong make-ready work, quality listing photos, responsive showings, good tenant screening, and timely renewal planning.
Vacancy cannot be eliminated, but it can be managed.
Related resources
- Rental Investing Terms category
- How do vacancy and maintenance affect rental income?
- What affects rental income?
- What is rental property cash flow?
- Rental Revenue Calculator
Frequently asked questions
Is vacancy rate always measured annually?
No. It can be measured monthly, quarterly, annually, or across a specific leasing period.
Does vacancy affect cash flow?
Yes. Vacancy reduces rent collected while many expenses continue.
Is vacancy rate different for multi-family properties?
It can be measured across multiple units, which makes it especially useful for portfolios.
Can property managers reduce vacancy?
They can help through pricing, marketing, leasing, renewal planning, and make-ready coordination.