Triple Net Lease Calculator — How It Works
Our triple net lease calculator gives you an instant breakdown of your total commercial lease cost — no signup, no spreadsheet, no waiting. Enter your square footage, base rent per sq ft, and your three annual net estimates (taxes, insurance, CAM), and your monthly NNN payment appears in real time.
Unlike basic NNN calculators that require you to click a "Calculate" button, this tool updates every figure live as you type — exactly the way a broker works through numbers with a client on-site.
How to Calculate a Triple Net Lease — Step by Step
Knowing how to calculate a triple net lease is essential for any commercial tenant, landlord, or broker. The formula has four steps:
- Step 1 — Annual Base Rent: Multiply the base rent per sq ft by the total leased area.
Example: $20/sq ft × 2,500 sq ft = $50,000/year - Step 2 — Total Annual NNN: Add property taxes + building insurance + CAM charges.
Example: $5,000 + $2,000 + $3,000 = $10,000/year - Step 3 — Total Annual Cost: Add base rent to total NNN.
Example: $50,000 + $10,000 = $60,000/year - Step 4 — Monthly Payment: Divide total annual cost by 12.
Example: $60,000 ÷ 12 = $5,000/month
The calculator above handles all four steps automatically. Just enter your numbers and read your monthly figure — no manual math needed.
What is a Triple Net (NNN) Lease?
A Triple Net lease (NNN) is the most common commercial real estate lease structure in the United States, Canada, and Australia. Unlike a gross lease — where the landlord pays all operating costs — an NNN lease passes three expense categories directly to the tenant:
- Net 1 — Property Taxes: Your pro-rata share of the building's annual property tax bill.
- Net 2 — Building Insurance: Your portion of the landlord's hazard and liability insurance premiums.
- Net 3 — Common Area Maintenance (CAM): Shared costs — parking lot, landscaping, exterior lighting, and building management fees.
Because tenants absorb operating cost fluctuations, base rents on NNN leases are typically 10–25% lower than equivalent gross leases. This makes NNN structures attractive for businesses with stable cash flow who want lower upfront rent.
What Are Typical NNN Costs Per Square Foot?
NNN charges vary widely by property type, age, and market. Here are typical US ranges to use as a benchmark when running your triple net lease calculation:
- Retail Strip Centers: $3 – $8 per sq ft / year
- Industrial / Warehouse: $2 – $5 per sq ft / year
- Class A Office Buildings: $8 – $20 per sq ft / year
- Single-Tenant Net Lease (e.g. fast food): $4 – $10 per sq ft / year
Always ask the landlord for a 3-year history of actual NNN expenses — not just estimates — before signing. Use this calculator to stress-test different NNN scenarios before committing.
What Space Can I Afford? (Reverse NNN Calculator)
Most tenants approach leasing the wrong way — they find a space first, then calculate the cost. Our reverse NNN calculator flips that process. Enter your maximum monthly budget, and the tool instantly tells you the maximum square footage you can afford at the current rent and NNN rates.
This is especially useful for small business owners comparing multiple spaces, or brokers presenting budget options to a client during a site tour.