Commercial Lease Calculator
Calculate Triple Net (NNN), Modified Gross, and Full Service Gross rents with CAM charges and annual escalation schedules.
Commercial Lease & Rent Expense Calculator
Compare Triple Net (NNN), Modified Gross, and Full Service Gross commercial leases with annual escalations.
Year-By-Year Cash Flow Projection
| Year | Effective $/SF | Monthly Rent | Annual Rent |
|---|---|---|---|
| Yr 1 | $42.00 | $12,250 | $147,000 |
| Yr 2 | $42.96 | $12,530 | $150,360 |
| Yr 3 | $43.95 | $12,818 | $153,821 |
| Yr 4 | $44.97 | $13,115 | $157,385 |
| Yr 5 | $46.02 | $13,421 | $161,057 |
How Commercial Lease Rents Are Structured
Unlike residential leases where rent is fixed and inclusive, commercial real estate leases involve pass-through expenses, square footage measurements, and compounding annual escalations. Calculating the true cost per square foot prevents catastrophic budgeting shortfalls for business owners.
Total Triple Net (NNN) Rent Formula
Total Monthly Rent = [Square Feet × (Base Rent + CAM + Taxes + Insurance)] ÷ 12
Commercial Tenant & Landlord Scenarios
- ✓Retail Storefront & Restaurant Budgeting
Forecast true total occupancy expenses when leasing high-visibility shopping center retail spaces with heavy CAM and property tax pass-throughs.
- ✓Corporate Office Space Negotiations
Compare landlord offers between Full Service Gross (all utilities and janitorial included) versus Modified Gross structures.
- ✓Warehouse & Light Industrial Facilities
Accurately calculate large-footprint distribution center occupancy costs over 5 to 10-year master lease contracts.
- ✓Landlord Pro Forma Rent Roll Forecasting
Model future gross revenues with standard 2.5% to 4% annual compounding rent escalation clauses across multi-tenant buildings.
Key Calculator Features
Side-by-Side NNN vs Gross Comparison
Easily switch between Triple Net (NNN), Modified Gross, and Full Service Gross lease models to understand true out-of-pocket costs.
Itemized Operating Expense (OPEX) Pass-Throughs
Breaks down Common Area Maintenance (CAM), building insurance, and municipal property taxes on a per-square-foot basis.
Multi-Year Escalation Modeling
Simulates compound annual rent increases over lease terms up to 10 years with exact year-by-year cash flow projections.
Spreadsheet CSV Export
Export the complete year-by-year rent roll and cash expenditure schedule straight into Microsoft Excel or Google Sheets.
Frequently Asked Questions
What is a Triple Net (NNN) commercial lease?
In a Triple Net lease (abbreviated NNN), the tenant pays base rent plus the three 'nets': property taxes, building insurance, and Common Area Maintenance (CAM) expenses such as landscaping, parking lot maintenance, and exterior repairs.
How is commercial rent per square foot calculated?
Commercial rent is typically quoted as an annual rate per square foot ($/SF/Yr). To find the monthly rent: (Square Feet × Annual Rate) ÷ 12. For example, 3,000 SF at $30/SF/Yr = (3,000 × $30) ÷ 12 = $7,500 monthly base rent.
What is the difference between Modified Gross and Full Service Gross?
In a Full Service Gross lease, the landlord pays all operating expenses, taxes, insurance, and utilities out of the base rent. In a Modified Gross lease, the tenant pays base rent plus a negotiated portion of operating expenses (typically interior utilities and janitorial services).
What are typical commercial lease escalation rates?
Standard commercial lease contracts usually feature annual rent increases between 2.5% and 3.5%, or increases tied directly to the Consumer Price Index (CPI) to protect landlords against inflation.
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