FREE OWNER CALCULATOR
What is one tenant’s triple-net share?
Enter the property’s annual taxes, insurance, and CAM, plus the tenant’s square footage. See their allocated share for each bucket, the monthly estimate, the per-square-foot cost, and the balance against what they’ve already paid.
Allocate taxes, insurance, and CAM by square footage
Enter the property’s annual totals for each bucket and this tenant’s space. Every figure is editable.
This tenant’s share is 6.67% of the property. Their allocated NNN for the year is $10,000 ($833/month, $3.33/sq ft).
How the calculation works
Tenant square footage ÷ property rentable square footage. A 3,000 sq ft space in a 45,000 sq ft center is 6.67%.
Taxes, insurance, and CAM are each multiplied by the pro-rata share and by the fraction of the year the tenant occupied, then rounded to whole dollars per line.
The allocated total minus the NNN estimates already billed and paid. Positive means the tenant owes a true-up; negative means a credit is due back.
GOOD TO KNOW
Questions owners ask about NNN allocation.
What does NNN (triple net) mean?
In a triple-net lease the tenant pays base rent plus its share of the three 'nets': property taxes, property insurance, and common area maintenance (CAM). The landlord passes those operating costs through rather than absorbing them in the rent.
How is a tenant's share usually calculated?
Most leases use a pro-rata share: the tenant's rentable square footage divided by the property's total rentable square footage. Some leases define the denominator differently (leased area, or a gross-up to an assumed occupancy), so check the lease's exact definition before relying on this calculator.
Why is the monthly figure divided by months occupied rather than 12?
If a tenant occupied for six months, its allocation is already prorated to half the annual expense. Dividing that by six shows the realistic monthly estimate the tenant actually experienced, rather than an artificially low twelfth.
What isn't included here?
Caps on controllable expenses, base-year expense stops, excluded cost categories (capital items, leasing costs, management fees beyond an allowed percentage), administrative fees, and vacancy gross-ups. Each of those is lease-specific; the CAM reconciliation calculator handles a controllable-expense cap.