Commercial Lease Calculator
Calculate commercial lease costs for NNN, gross, and modified gross leases.
See your monthly rent, annual cost, and total lease expense.
Monthly Lease Cost
Commercial lease costs depend on the lease type:
Gross Lease: Tenant pays one flat rent amount. Landlord covers all operating expenses.
Monthly Cost = (Price per Sq Ft × Total Sq Ft) / 12
NNN (Triple Net) Lease: Tenant pays base rent PLUS property taxes, insurance, and maintenance (CAM).
Monthly Cost = (Base Rent per Sq Ft + NNN Costs per Sq Ft) × Total Sq Ft / 12
Modified Gross: Tenant pays base rent plus some (but not all) operating expenses.
Example: 2,000 sq ft office, NNN lease at $25/sq ft base + $8/sq ft NNN costs:
- Annual base rent = $50,000
- Annual NNN costs = $16,000
- Total annual = $66,000
- Monthly cost = $5,500
Tips:
- NNN leases appear cheaper but add 30-50% in operating costs
- Always calculate the total occupancy cost, not just base rent
- Negotiate caps on annual NNN cost increases
- Price per square foot is quoted annually in the US