Triple Net Total Cost Calculator

In a Triple Net lease, the tenant pays base rent plus three additional expense categories: property taxes, building insurance, and operating/maintenance expenses (CAM). This shifts most ownership costs to the tenant, making the all-in cost significantly higher than the quoted base rent.

NNN expenses (taxes + insurance + CAM) typically range from $8 to $20 per SF annually depending on property type, age, and location. Retail properties in high-tax states often run above $15/SF. Always request a prior-year actual expense breakdown before signing.

Yes, most NNN leases exclude structural repairs, roof replacement, and capital improvements. These remain the landlord's responsibility. However, some landlords attempt to pass through amortized CapEx in CAM. Review your lease carefully for exclusion language.

Landlord quotes are often based on prior-year actuals, not current expenses, and some cost categories are added quietly at reconciliation. Start by requesting an itemized prior-year expense breakdown and comparing it to what you are currently paying. CAMAudit's Excluded Service Charges rule and other detection rules analyze your actual lease and reconciliation together to identify costs that should not be in your NNN pool.