NNN Lease Calculator
The NNN lease calculator for a triple net or other commercial lease quote: base rent plus taxes, insurance, and CAM, per square foot, across your footage — monthly and annual, split between rent and pass-throughs.
All-in rate
Monthly total
Annual total
Base rent / pass-throughs
Shareable: inputs live in the page URL.
How do you compute true NNN occupancy cost?
Add base rent, taxes, insurance, and CAM per square foot, then multiply by the square footage. A 2,500 SF drive-thru pad quoted at $30 base with $4.50 taxes, $1.50 insurance, and $4.00 CAM is really a $40.00/SF lease: $100,000 a year, $8,333 a month. The pass-throughs — $25,000 of the total — are the piece that moves after closing: a county reassessment or insurance repricing lands there. Quoting "thirty dollars a foot" without the nets understates the tenant's cost by a third, which is exactly why the sector quotes all-in.
What occupancy ratio should an NNN buyer watch?
Divide the annual total by the tenant's sales to get the occupancy ratio: under 8% is comfortable for most retail, 8–10% is watch-list, above that the renewal is a negotiation. On single-tenant deals, this arithmetic is your tenant-health screen — see the triple net lease guide for how the structures allocate each cost.
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What does an NNN or triple net lease calculator add to base rent?
It adds property taxes, insurance, and CAM — the three nets in a triple net quote — each entered per square foot per year, then multiplies that all-in rate by square footage. Use the same total when a commercial lease quote is gross or modified gross and you need one occupancy-cost number. Take the tax, insurance, and CAM figures from the offering package or lease abstract; on freestanding single-tenant buildings, taxes also come from the county assessor and insurance from a broker quote.
What does this NNN lease calculator actually add up?
The tenant's true occupancy cost: base rent plus the three nets — property taxes, insurance, and CAM (common-area maintenance) — each entered per square foot per year, multiplied across your footage. The output shows the all-in rate per SF, plus monthly and annual totals split between base rent and pass-throughs, which is exactly how landlords and brokers quote and compare NNN space.
Where do I find the taxes, insurance, and CAM numbers to enter?
From the landlord's offering package or lease abstract — ask for the current-year NNN estimate, usually quoted as one combined per-SF figure you can split or enter across the three fields. On freestanding single-tenant buildings, taxes come straight off the county assessor's site and insurance from a broker quote. Estimates get reconciled annually against actuals; budget for that true-up.
Why do investors use a tenant-cost calculator when buying property?
Because tenant occupancy cost is the landlord's early-warning system. Rent-plus-nets as a share of store sales tells you whether the lease survives renewal: a QSR paying 8% of sales all-in renews; one paying 14% negotiates or leaves. Buyers who compute the tenant's full cost — not just the rent they'd collect — catch fragile deals the cap rate hides.
How is NNN rent different from gross or modified gross rent?
Gross rent bundles everything into one number the landlord pays expenses from; NNN unbundles it so the tenant pays expenses directly and base rent stays lean. Modified gross splits selected expenses. Comparing quotes across structures requires converting to all-in occupancy cost per SF — which is precisely the number this calculator produces.
Is a triple net lease calculator different from this NNN lease calculator?
No. Triple net and NNN name the same lease: base rent plus property taxes, insurance, and CAM. Enter each of those per square foot per year with the square footage, and this tool returns the all-in rate, the monthly total, and the annual split between base rent and pass-throughs.
What should a commercial lease calculator compare?
All-in occupancy cost per square foot, not the headline rent alone. A gross quote bundles expenses into one landlord-paid number, an NNN quote unbundles them, and a modified gross quote splits selected expenses. This page turns the NNN inputs into that shared monthly and annual cost so the quotes can be compared.
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