Triple Net (NNN) Lease Calculator
Use our free Triple Net (NNN) Lease Calculator to quickly estimate annual NNN charges (taxes, insurance, CAM), effective net rent, and tenant total occupancy cost, based on inputs like base rent, property taxes, insurance, CAM, and leased area. Perfect for landlords, tenants, brokers, and asset managers.
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Tenant Cost Breakdown
Tenant Pro-Rata Share
Monthly Payment
$0
Estimated monthly obligation
All calculations are estimates and should be verified by a professional.
Triple Net (NNN) Lease Formula
These calculations split building-level expenses to tenants by their pro-rata share and add them to base rent to get the total occupancy cost. Adjust for caps, contribution structures, or specific lease clauses as needed.
How this Triple Net calculator works
The calculator takes building-level recoverable expenses (tax, insurance, CAM, others), multiplies each by the tenant's pro-rata share, and sums them to generate tenant NNN charges. It then adds those charges to base rent to show the tenant's total cost and the landlord's effective net rent. Use it to compare lease structures, evaluate offers, and prepare rent-roll projections. For precise lease negotiation, include documented expense definitions, caps, audit rights, and reconciliation rules.
When to use this Triple Net calculator
During lease negotiations to compare gross vs NNN offers
To model tenant total occupancy cost for budgeting and underwriting
For rent-roll projections and forecasting landlord net cash flow
When verifying CAM reconciliations or estimating year-end reconciliations
To compare full-service gross leases vs NNN leases across properties
Want to simplify lease modeling and reconciliation?
Use ServiceAgent.ai to automate rent-rolls, model NNN reconciliations, generate tenant-facing CAM summaries, and track lease expirations and escalations from one dashboard.
Book a Free DemoTypical NNN Expense Ranges & Benchmarks
NNN costs vary widely by property type, location, and property condition. Use these rough ranges to sanity-check inputs:
Property taxes
$0.50 – $6.00+ per sq ft per year (varies by market & assessed value)
Insurance
$0.05 – $1.00 per sq ft per year (depends on property type & risk)
CAM (maintenance, landscaping, common utilities)
$0.25 – $3.00 per sq ft per year (depending on building class and amenities)
Total NNN typical (low-mid markets)
$1.00 – $6.00+/sq ft/yr; prime markets or high-service properties can be higher
Use local data and historical operating statements to refine these benchmarks—market taxes and service levels drive the largest variance.
Frequently Asked Questions
What is a Triple Net (NNN) lease?
A lease where the tenant pays property taxes, insurance, and common area maintenance (CAM) in addition to base rent—shifting many property-level operating expenses to the tenant.
How is tenant pro-rata share calculated?
Usually: Leased Area ÷ Total Building Area. Some leases use rentable vs usable area or specific negotiated shares.
Do NNN charges include capital expenditures?
Typically no—capital expenditures are usually excluded or amortized per lease terms; some leases allow amortized capital pass-throughs with limits.
What are CAM caps and why do they matter?
CAM caps limit annual increases or set ceilings on tenant recoveries—protecting tenants from large unexpected expense spikes. They should be modeled when present.
How do taxes get reconciled?
Landlord provides year-end reconciliations showing actual expenses vs tenant estimated payments; tenants then pay shortfalls or receive credits per lease terms.
Can NNN leases include management or administrative fees?
Yes—many leases include a management fee (%) added to recoverable expenses; confirm if the lease allows this and whether it's capped.
Should I include vacancy/collection loss in landlord net rent?
Yes—underwriting often deducts a vacancy/collection loss % from gross base rent to estimate effective rent and NOI.
Is this calculator suitable for triple net retail, industrial, and office equally?
The calculator works for any NNN structure, but expense mixes differ by asset class—retail often has higher CAM and utilities; industrial may have lower CAM but different tax profiles. Customize inputs per asset class.