What is the difference between a Gross lease and a NNN lease?

In a Full-Service Gross lease, the tenant pays one flat monthly rate and the landlord pays taxes, insurance, and maintenance. In a NNN lease, base rent is lower, but the tenant pays all operational expenses separately.

Updated: August 2026 • Verified v1.2

Commercial Real Estate Triple Net (NNN) Lease Calculator

Finance & MathPopular

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Monthly_Total = (Sqft * (BaseRent + CAM + Taxes + Ins)) / 12; Gross_Rate = BaseRent + NNN_Expenses

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Understanding Your Results

Calculates total monthly lease obligation, guaranteed monthly base rent, monthly NNN pass-through expenses (CAM, taxes, insurance), and equivalent all-in gross rent per square foot.

Practical Guidance & Next Steps

Always audit the building CAM reconciliations annually, as CAM costs can fluctuate significantly based on snow removal, roof maintenance, and property management fees.

What is this?

A commercial property utility that calculates tenant obligations under Triple Net (NNN) lease structures.

How does it work?

1. Enter rentable square footage and base rent ($/sqft/year). 2. Enter property taxes, insurance, and CAM fees ($/sqft/year). 3. View total monthly payment, expense breakdown, and gross equivalent rate.

Why use it?

Prevents financial surprises by revealing the true all-in monthly cost of commercial leases.

Technical Scope & Calculation Limitations

Calculates standard commercial NNN lease pass-through schedules.

Frequently Asked Questions

In a Triple Net lease, the tenant pays a base rent plus the property's three operational expense nets: real estate property taxes, building insurance, and common area maintenance (CAM).

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