How to Use the Commercial Rental Yield & Vacancy Calculator
Commercial property carries much higher vacancy risk than residential rentals, and once a space goes empty it can take months to find a new tenant. This calculator takes your purchase price, deposit, and monthly rent, then applies your expected vacancy rate to show both the gross yield and the vacancy-adjusted effective yield.
The gross yield assumes zero vacancy, while the effective yield reflects the income you'd actually lose at your assumed vacancy rate. The wider the gap between the two, the more sensitive your return is to vacancy risk.
Beyond vacancy, factor in mortgage interest if financed, property tax and common area fees that keep running during vacant periods, and tenant build-out or restoration costs between leases. Newer buildings or areas where the retail district is still developing tend to see longer initial vacancy stretches, so it's wise to model a higher-than-expected vacancy rate rather than an optimistic one.
Frequently Asked Questions
A stable ground-floor retail space might see 5-10% annual vacancy, while a riskier location or upper-floor unit could run 15-20% or more. Checking the actual vacancy history of nearby properties over the past 2-3 years gives the most reliable estimate.
The effective (vacancy-adjusted) yield is the safer number to base a decision on. Mortgage interest and operating costs keep running during vacant periods, so relying on the gross yield alone can leave you unprepared for the real cash flow.