Commercial Lease Calculator

Free Commercial Lease Calculator — break out base rent, escalations, NNN/CAM/insurance/tax and total cost for office, retail, and industrial leases.

938.2K uses Updated · 2026-05-14 Runs locally · zero upload
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How to Use Commercial Lease Calculator

The Commercial Lease Calculator delivers fast, transparent calculations with a clear step-by-step output.

  1. Choose the rate basis (per sqft yearly/monthly, or flat monthly/yearly).
  2. Enter leased area, base rate, term, and annual escalation.
  3. Add NNN, CAM, insurance, and property tax as needed.
  4. View monthly total, annual cost, lifetime cost, and average month.

Formula & Theory — Commercial Lease Calculator

Commercial leases blend base rent, recurring add-ons, and contractual escalation. The Commercial Lease Calculator normalizes each component to the same monthly basis so you can compare offers across landlords.

Annual base = Area × Rate (per-sqft basis) or Flat × period factor
Annual addons = Area × (NNN + CAM + Insurance + Tax)
Lifetime = Σ (year_i base × (1 + esc)^i + addons)
SymbolMeaning
AreaRentable square feet
NNNTriple net pass-through cost
CAMCommon area maintenance
EscalationAnnual base rent growth

Use Cases for Commercial Lease Calculator

  • Tenants comparing competing office or retail offers.
  • Brokers presenting LOIs with normalized cost.
  • CFOs forecasting occupancy cost on a rolling basis.
  • Startups budgeting space relative to revenue.
  • Landlords showing tenants the full lease cost.
  • Real-estate students learning lease economics.

Whether you are a homeowner, investor, or analyst, the Commercial Lease Calculator produces instant results with formulas and explanations you can rely on.

Frequently asked questions about Commercial Lease Calculator

What does NNN mean?

Triple Net — the tenant pays the landlord base rent plus property tax, insurance, and CAM, typically expressed per sqft per year.

What is annual escalation?

A contractual increase in base rent each year, commonly 2–4% or tied to CPI.

Does the calculator include free rent?

Not directly. Treat free months as a credit on lifetime cost or subtract them from the deposit field.

Should I use rentable or usable area?

Use rentable square feet, which includes the load factor for common areas; brokers and landlords quote rate per rentable foot.

Is my data stored?

No. All calculations run locally in your browser; nothing is sent to a server.