Triple Net Lease Calculator
Triple Net Lease Calculator
Annual base rent in dollars per square foot
Annual property tax — tenant-paid in NNN
Total lease duration in years
Annual NNN expense increase percentage
Enter Your Lease Details
Fill in the base rent, square footage, and NNN expenses above to see your total monthly payment, expense breakdown, and year-by-year rent schedule.
Important
This calculator is provided for general information only and is not financial, tax, or legal advice. Results are estimates and do not reflect your full circumstances, current rates, fees, or eligibility rules. Speak to a qualified professional before making a financial decision.
Calculate NNN tenant costs, landlord NOI, cap rate, and rent escalation schedules
A Triple Net (NNN) lease is one of the most common commercial real estate lease structures in the United States. Understanding your total occupancy costs — including base rent plus property taxes, insurance, and common area maintenance — is essential whether you are a tenant negotiating a new lease or a landlord evaluating a property investment. Our Triple Net Lease Calculator gives you a complete picture of every dollar involved in an NNN lease. Enter the base rent per square foot, the leasable square footage, and the annual NNN expenses (property taxes, insurance, and CAM) to instantly see your total monthly payment, all-in cost per square foot, and the full breakdown of where each dollar goes. For investors and landlords, switch to Landlord Perspective mode to calculate Net Operating Income (NOI) and cap rate. The calculator accounts for vacancy loss and property management fees — giving you the true cash return on a triple net investment property. A typical NNN property trades at cap rates between 4% and 7%, depending on tenant credit quality, lease term remaining, and market location. Lease escalation is another critical factor. Most NNN leases include annual rent bumps of 2%–3% per year. Our rent escalation schedule projects your payments year by year across the full lease term, so you can see exactly how much the total lease will cost and how your monthly payment changes over time. This is essential for both lease negotiation and financial modeling. We also provide a three-way lease type comparison. NNN leases keep the base rent lower because tenants absorb operating expenses. Modified Gross leases split expenses differently, while Full Service Gross leases bundle everything into a single monthly payment. Seeing these side by side helps you make an informed decision about which lease structure best matches your risk tolerance and financial goals. For tenants evaluating a particularly competitive deal, the Effective Rent section accounts for tenant improvement (TI) allowances and free rent periods. Landlords often provide these concessions to attract tenants — the effective rent calculation lets you compare lease deals apples-to-apples by amortizing these incentives across the full lease term. Multi-tenant properties use pro-rata allocation to divide shared NNN expenses across tenants based on square footage. Our multi-tenant section calculates your proportional share automatically. For example, if you lease 3,000 sq ft in a 15,000 sq ft building, your pro-rata share is 20% of all NNN expenses. All results can be exported to CSV for use in spreadsheets or printed for lease negotiations and investor presentations.
Understanding Triple Net Leases
What Is a Triple Net (NNN) Lease?
A Triple Net lease requires the tenant to pay three operating expenses in addition to base rent: (1) property taxes, (2) building insurance, and (3) common area maintenance (CAM). These three costs are the 'three nets' that give NNN leases their name. In a standard gross lease, the landlord covers these expenses from the rent collected. In an NNN lease, these costs pass directly to the tenant, allowing landlords to set lower base rents while maintaining predictable net income. NNN leases are the dominant structure for single-tenant commercial properties occupied by major retailers, fast food chains, pharmacies, and other national credit tenants. They are favored by investors because the landlord receives a stable, predictable income stream with minimal management responsibilities.
How NNN Lease Costs Are Calculated
The total annual tenant cost in a triple net lease equals: Annual Base Rent (base rent per sq ft × leasable sq ft) plus Annual NNN Costs (property taxes + insurance + CAM). Monthly tenant payment is simply the total annual cost divided by 12. The all-in cost per square foot divides total annual tenant cost by the leased square footage. For landlords, Net Operating Income (NOI) equals annual base rent minus vacancy loss minus property management fees. NNN expenses are pass-through costs — they do not affect landlord NOI. Cap rate is calculated as NOI divided by property value, expressed as a percentage. Rent escalation uses compound growth: Year N base rent = Year 1 base rent × (1 + escalation%)^(N-1). Total lease cost sums all annual payments across the full term.
Why NNN Lease Analysis Matters
Tenants who focus only on the advertised base rent can be surprised by the true all-in cost of an NNN lease. In some markets, NNN expenses can add $5–$15 per square foot annually on top of base rent — representing 20%–40% of total occupancy cost. Understanding the full cost picture protects tenants from budget surprises and helps them compare NNN properties with gross lease alternatives fairly. For investors and landlords, proper NNN analysis determines whether a property is priced correctly relative to the income it generates. A 5,000 sq ft retail NNN property generating $150,000 in annual NOI should be priced at $2–$3 million at prevailing 5%–7% cap rates. Misunderstanding these relationships leads to overpaying or underpricing investment properties.
Important Limitations and Caveats
This calculator provides estimates based on the inputs you provide. Actual NNN lease costs vary significantly by property age, location, and lease negotiations. Property taxes can increase annually based on local assessments, and CAM charges may include administrative fees, management markups, and capital expenditure reserves not always disclosed upfront. Always request an NNN expense reconciliation from prior years before signing a lease. Modified Gross lease comparisons in this calculator use a simplified model (tenant pays ~30% of NNN expenses). Actual MG lease terms vary widely by negotiation. Effective rent calculations depend on the actual TI allowance and free rent period in your specific lease. Consult a commercial real estate attorney and broker before signing any commercial lease agreement.
NNN Lease Formulas
Annual Base Rent
Annual Base Rent = Base Rent ($/sqft) × Leasable Square Footage
Total base rent obligation per year before NNN expenses
Annual NNN Costs
Annual NNN = Property Taxes + Insurance + CAM
Sum of the three tenant-paid operating expenses
Total Annual Tenant Cost
Total Annual Cost = Annual Base Rent + Annual NNN Costs
Full all-in occupancy cost per year
Monthly Payment
Monthly Payment = Total Annual Cost ÷ 12
Total monthly tenant obligation
Landlord NOI
NOI = Annual Base Rent − Vacancy Loss − Management Fee
Net Operating Income (NNN expenses are pass-through and do not reduce NOI)
Cap Rate
Cap Rate = (NOI ÷ Property Value) × 100
Return rate used to value NNN investment properties
Rent Escalation
Year N Rent = Year 1 Rent × (1 + Escalation%)^(N−1)
Compound annual rent increase formula
Effective Rent
Effective Rent = (Total Rent − TI Allowance − Free Rent Value) ÷ Lease Months
Monthly rent after amortizing landlord concessions
Pro-Rata NNN Allocation
Tenant NNN Share = (Tenant Sq Ft ÷ Total Building Sq Ft) × Total NNN Costs
Multi-tenant NNN cost allocation by square footage
NNN Lease Reference
Typical NNN Cap Rates by Tenant Type
Market cap rate ranges for triple net lease properties (2024–2025)
| Tenant Type | Typical Cap Rate | Lease Term |
|---|---|---|
| Investment-grade national (e.g., Walgreens, McDonald's) | 4.0%–5.5% | 15–20 years |
| National credit tenant (e.g., Dollar General, Autozone) | 5.0%–6.5% | 10–15 years |
| Regional chain or franchise | 6.0%–7.5% | 7–12 years |
| Local / non-credit tenant | 7.0%–9.0% | 5–10 years |
Lease Structure Comparison
Who pays what under different commercial lease structures
| Expense | NNN (Triple Net) | Modified Gross | Full Service Gross |
|---|---|---|---|
| Base Rent | Tenant | Tenant | Tenant (bundled) |
| Property Taxes | Tenant | Landlord | Landlord |
| Insurance | Tenant | Landlord | Landlord |
| CAM | Tenant | Landlord | Landlord |
| Utilities | Tenant | Tenant | Landlord |
| Janitorial | Tenant | Tenant | Landlord |
Typical NNN Expense Ranges
Common annual NNN expense ranges per square foot
| NNN Component | Low | Mid | High |
|---|---|---|---|
| Property Taxes | $0.50/sqft | $1.50/sqft | $4.00/sqft |
| Insurance | $0.25/sqft | $0.75/sqft | $1.50/sqft |
| CAM | $1.00/sqft | $3.00/sqft | $8.00/sqft |
| Total NNN | $1.75/sqft | $5.25/sqft | $13.50/sqft |
NNN Lease Examples
Retail Strip Mall NNN Lease
A tenant leases 3,500 sq ft in a strip mall at $22/sqft/year base rent. Annual NNN: taxes $8,400, insurance $3,500, CAM $7,000. 5-year lease with 2.5% annual escalation.
Annual Base Rent = $22 × 3,500 = $77,000
Annual NNN = $8,400 + $3,500 + $7,000 = $18,900
Total Annual Cost = $77,000 + $18,900 = $95,900
Monthly Payment = $95,900 ÷ 12 = $7,992
All-In Cost Per Sq Ft = $95,900 ÷ 3,500 = $27.40/sqft
Year 5 Base Rent = $77,000 × (1.025)^4 = $84,904
Total 5-Year Cost ≈ $520,000
Monthly all-in payment: $7,992. The tenant's true cost is $27.40/sqft/year — 24.5% higher than the advertised base rent of $22/sqft.
NNN Investment Property Cap Rate
A landlord owns a 5,000 sq ft pharmacy NNN property. Base rent: $30/sqft/year. Property value: $1,800,000. Vacancy: 5%, management fee: 4%.
Annual Base Rent = $30 × 5,000 = $150,000
Vacancy Loss = $150,000 × 5% = $7,500
Management Fee = $150,000 × 4% = $6,000
NOI = $150,000 − $7,500 − $6,000 = $136,500
Cap Rate = ($136,500 ÷ $1,800,000) × 100 = 7.58%
NOI: $136,500/year. Cap Rate: 7.58% — above the 5%–7% typical range for pharmacy NNN properties, suggesting either a favorable purchase price or above-average risk.
How to Use This Calculator
Enter Base Rent and Square Footage
Input the annual base rent per square foot (e.g., $25/sqft/year) and the total leasable square footage. These two values determine your annual base rent obligation before NNN expenses.
Add the Three NNN Expenses
Enter the annual property taxes, building insurance, and CAM (Common Area Maintenance) costs. These are the three 'nets' that tenants pay directly in addition to base rent. Ask the landlord for prior-year actuals to estimate future costs.
Set Lease Term and Escalations
Enter the lease term in years and the annual rent escalation percentage (typically 2%–3%). The calculator will generate a year-by-year payment schedule showing how your costs grow over time and the total cost over the full lease term.
Review Results and Export
Switch to Landlord View to see NOI and cap rate. Expand the Concessions section to calculate effective rent. Use the Export CSV button to download the full analysis, or Print for lease negotiation meetings.
Frequently Asked Questions
What does NNN mean in commercial real estate?
NNN stands for Triple Net, referring to the three operating expenses that tenants pay in addition to base rent: property taxes, building insurance, and common area maintenance (CAM). In a standard gross lease, the landlord pays these costs from the rent collected. In a triple net lease, the costs pass through to the tenant. This arrangement gives landlords predictable, nearly passive income and allows them to advertise lower base rents. Tenants must budget for these additional costs, which typically add $3–$15 per square foot annually depending on the property's age, size, and location.
What is a typical cap rate for a triple net lease property?
NNN lease properties typically trade at cap rates between 4% and 8%, depending on several factors. Properties occupied by investment-grade national tenants (like Walgreens, McDonald's, or Dollar General) with long lease terms often trade at 4%–5% cap rates because of their perceived safety and stability. Smaller tenants or shorter remaining lease terms command higher cap rates — 6%–8% or more — to compensate investors for increased risk. Location matters greatly: urban markets trade at lower cap rates than rural or suburban locations. A higher cap rate means lower property price relative to income, and a lower cap rate means a higher price.
What is CAM in a triple net lease?
CAM stands for Common Area Maintenance and includes costs for maintaining shared areas of a property such as parking lots, landscaping, hallways, lobbies, and building exteriors. CAM charges can include snow removal, security, pest control, property management fees, and sometimes capital expenditures like roof repairs or parking lot repaving. CAM is often the most variable and negotiable NNN expense. Tenants should always request a CAM reconciliation for prior years and negotiate caps on controllable CAM expenses, typically limiting annual increases to 3%–5% per year regardless of actual cost increases.
How is effective rent different from face rent in an NNN lease?
Face rent (or asking rent) is the advertised base rent per square foot stated in the lease. Effective rent accounts for landlord concessions that reduce the actual cost — specifically tenant improvement (TI) allowances and free rent periods. For example, if a landlord offers $20/sqft/year for 5 years but provides 3 months of free rent and a $30/sqft TI allowance, the effective rent is substantially lower than $20/sqft. Calculating effective rent allows tenants to compare two lease offers fairly even if they have different base rents and concession packages. Always compare effective rents, not just face rents, when evaluating competing lease options.
What is the difference between a triple net and a modified gross lease?
In a triple net (NNN) lease, the tenant pays all three operating expenses: property taxes, insurance, and CAM — in addition to base rent. In a modified gross lease, expenses are shared between tenant and landlord. A common modified gross structure has the tenant pay utilities and janitorial costs while the landlord covers taxes, insurance, and CAM within the gross rent. Modified gross leases are more common in multi-tenant office buildings, while NNN leases dominate single-tenant retail. Full service gross leases include everything in one monthly payment with the landlord absorbing all operating costs. NNN leases typically have lower base rents to reflect the additional tenant responsibility.
How does annual rent escalation work in a triple net lease?
Most NNN leases include annual rent escalations — scheduled rent increases built into the lease agreement. The two most common structures are percentage increases (e.g., 2% or 3% per year) and CPI-based increases tied to inflation. Fixed percentage escalations are more predictable for budgeting. A $25/sqft base rent with a 3% annual escalation becomes $25.75 in Year 2, $26.52 in Year 3, and so on. Over a 10-year lease, this compounds significantly — the Year 10 rent would be $33.60/sqft, 34% higher than the starting rate. Understanding the cumulative impact of escalations is critical for both tenant budget planning and investor underwriting.