Property operations

Loss-to-Lease Calculator

Measure revenue below or above current market rent. Enter your own assumptions and local rates.

What this calculator estimates

Measure revenue below or above current market rent. It combines the inputs below to produce Annual loss-to-lease. Every assumption remains editable so the estimate can reflect the property, financing and location being evaluated.

Worked example

Using the displayed sample assumptions, the calculator produces $45,600. This is an illustration, not a market quote. Change one input at a time to understand what drives the result.

Inputs and assumptions

• Comparable units or spaces — sample input: 20 units
• Average monthly contract rent — sample input: 1800 currency units
• Average monthly market rent — sample input: 2000 currency units
• Physical occupancy — sample input: 95 %

How to interpret the result

Reconcile the result with leases, invoices and property records. Compare a conservative case with an expected case and keep a record of the assumptions used.

Common mistake to avoid

Do not mix physical occupancy with economic occupancy. Local definitions, taxes, lending practices and measurement requirements can materially change the result.

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Reviewed 2026-09-08.