Commercial real estate
CAM Charges Calculator
Estimate common-area maintenance charges for a commercial tenant. Replace every default with figures that apply to your property and location.
Calculate your result
What this calculator estimates
Estimate common-area maintenance charges for a commercial tenant. It combines the inputs below to produce Annual CAM charges. 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 $42,000. This is an illustration, not a market quote. Change one input at a time to understand what drives the result.
Inputs and assumptions
- Tenant rentable area — sample input: 5000 sq. ft.
- Annual CAM rate per area unit — sample input: 8 currency units per sq. ft.
- CAM administration fee — sample input: 5 %
- Annual cap — optional — sample input: 0 currency units
How to interpret the result
Use lease definitions and verified operating statements. Compare a conservative case with an expected case and keep a record of the assumptions used.
Common mistake to avoid
Do not compare properties using inconsistent NOI definitions. Local definitions, taxes, lending practices and measurement requirements can materially change the result.
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Reviewed 2026-09-08.