Commercial Lease Calculator

Calculate commercial rent for NNN, gross, or modified leases with CAM and escalation.
$
Lease Type
$
%

Monthly Rent

$5,500.00

Annual Rent

$66,000.00

Total Cost

$350,402.96

Escalation Schedule

Effective Rate/sqft$33.00
Year 1$66,000.00
Year 2$67,980.00
Year 3$70,019.40
Year 4$72,119.98
Year 5$74,283.58

Use the Commercial Lease Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

A Commercial Lease Calculator helps business owners and investors determine the total cost of leasing commercial real estate, including base rent, operating expenses, and additional charges. With commercial real estate costs projected to rise 4-6% in 2026 due to inflation and increased demand, accurate lease calculations are crucial for budgeting and cash flow planning.

The calculator combines base rent per square foot with additional costs like Common Area Maintenance (CAM), property taxes, and insurance, typically expressed as NNN (triple net) charges. It factors in lease escalations, percentage rent clauses, and tenant improvement allowances to provide a comprehensive annual and monthly cost analysis.

Always verify whether quoted rates include or exclude operating expenses, as this can significantly impact total costs. Be aware that percentage rent clauses can add substantial costs if your business exceeds sales thresholds, and factor in potential annual rent increases of 2-4% when planning long-term budgets.

5,000 sq ft retail space at $28/sq ft with $8/sq ft NNN charges

  1. 1 Calculate base annual rent: 5,000 square feet × $28 per square foot = $140,000 annual base rent
  2. 2 Add operating expenses (NNN): 5,000 square feet × $8 per square foot = $40,000 annual operating costs
  3. 3 Total annual lease cost: $140,000 + $40,000 = $180,000 per year
  4. 4 Monthly lease payment: $180,000 ÷ 12 months = $15,000 per month, equivalent to $36 per square foot annually including all expenses

Source: CFPB — Owning a Home · Last updated: April 2026

Frequently Asked Questions

What is a NNN lease?
A triple net (NNN) lease means the tenant pays base rent plus all three "nets": property taxes, building insurance, and common area maintenance (CAM). The total occupancy cost is significantly higher than the quoted base rent.
How do you calculate commercial rent per square foot?
Annual rent per square foot = total annual rent / rentable square feet. For a 2,000 sq ft space at $30/sq ft/year, annual rent is $60,000 or $5,000/month. Add NNN charges for total occupancy cost.
What is a typical commercial lease escalation?
Most commercial leases include annual rent increases of 2-4% or CPI-based adjustments. Some leases have fixed step-ups (e.g., $2/sq ft increase every year). Negotiate caps on CPI escalations to limit exposure.

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