What Is a Triple Net Lease? NNN Explained

A triple net lease, written NNN, is a commercial lease where the tenant pays the three main property operating costs (property taxes, building insurance, and common area maintenance) on top of base rent and utilities. The landlord collects a rent that is closer to net income because the variable operating costs flow through to the tenant. NNN is the standard structure for industrial, warehouse, and single-tenant retail real estate in the United States.

If you own, buy, or finance commercial property, the lease structure decides how much of your gross rent you actually keep. A triple net lease moves the unpredictable costs (taxes that get reassessed, insurance premiums that climb, repairs that come due) onto the tenant, which is why investors prize it for steady, predictable cash flow. But the word triple net hides a lot of detail. Two NNN leases on the same building can pass through very different costs depending on the caps, exclusions, and repair carve-outs buried in the document. This guide walks through what NNN means, who pays what, and the fields that matter when you read one.

Last updated July 2026.

What does triple net mean?

Triple net means the tenant covers the three nets: net property taxes, net building insurance, and net common area maintenance (CAM). The base rent is quoted separately and lower than it would be on a gross lease, because the operating costs sit on top of it rather than inside it. The phrase comes from how each cost is treated as a separate pass-through line the tenant reimburses, either monthly as an estimate that is reconciled annually or directly as bills come due.

What does a tenant pay in a triple net lease?

In a triple net lease the tenant pays base rent plus its pro-rata share of property taxes, building insurance, and common area maintenance, plus its own utilities and interior upkeep. On a single-tenant building the tenant often pays essentially all property costs. On a multi-tenant warehouse or shopping center, each tenant pays a share based on its square footage, and retail centers often layer a co-tenancy clause on top that can cut that rent if an anchor goes dark. The pass-through is usually estimated monthly and trued up once a year, so the tenant either owes a balance or gets a credit after the landlord reconciles actual costs.

What is the difference between a gross lease and a triple net lease?

In a gross lease the landlord pays the operating costs out of a single all-in rent, so the tenant has one predictable number and the landlord absorbs cost swings. In a triple net lease the tenant pays a lower base rent plus the actual taxes, insurance, and CAM, so the tenant carries the cost risk and the landlord keeps a cleaner net income. A modified gross lease sits between the two, splitting some costs and passing through others, often using a base-year stop. The structure changes who wins when costs rise, which is why it is one of the first things to confirm when you read a lease.

Who pays for repairs in a triple net lease?

It depends on the specific clause, which is exactly why the repair language has to be read carefully. Many triple net leases push routine maintenance and even roof, HVAC, and parking-lot upkeep onto the tenant, but the carve-outs vary: structural elements, the slab, and foundation often stay with the landlord, and some leases cap or amortize major capital replacements. A single missed carve-out can leave a six-figure roof or HVAC replacement with the owner instead of the tenant, so the repair split is one of the highest-stakes fields in any industrial abstract.

How do you calculate triple net charges?

Add the building's annual property taxes, insurance, and CAM, then multiply by the tenant's pro-rata share (its square footage divided by the building's leasable square footage) to get that tenant's annual NNN charge. Divide by twelve for the monthly estimate. For example, on a 100,000 square foot warehouse with 500,000 dollars of total taxes, insurance, and CAM, a tenant in 20,000 square feet carries 20 percent, or 100,000 dollars a year, about 8,333 dollars a month, on top of base rent. Caps and exclusions in the lease can lower the tenant's share, which is why the abstract should capture them.

What is a NNN lease in industrial real estate?

In industrial real estate, a NNN lease is the default. Warehouse, distribution, and logistics tenants typically take long terms (often five to ten years or more) and pay base rent plus all three nets, plus their own equipment and interior costs. Because the term is long and the building is cost-intensive, the recovery structure and the repair obligations are where the real economics live. Owners read those terms across the whole portfolio to make sure recoveries are billed correctly and capital liability is priced in. That portfolio read is the job of lease abstraction for industrial and logistics leases, which pulls the NNN pass-through terms, caps, repair split, and options into one consistent abstract.

Is a triple net lease good for the landlord or the tenant?

A triple net lease favors the landlord on cost predictability: the owner collects a stable net rent and passes the variable, rising costs to the tenant, which is why NNN single-tenant assets trade as bond-like investments. The tradeoff for the tenant is a lower base rent and full control of how the space is maintained. Neither side is automatically better off; it comes down to the caps, exclusions, and repair carve-outs in the actual document, which is why both sides should abstract the lease before they sign or buy.

What does PSF NNN mean?

PSF NNN means the rent is quoted per square foot on a triple net basis, so the number you see is the base rent only and the tenant pays taxes, insurance, and CAM on top. A space listed at "$18.00 PSF NNN" charges $18 per rentable square foot in base rent, plus the property's net charges, which often add another $4 to $12 PSF. Always ask for the NNN estimate before you compare quotes.

What is the difference between N, NN, and NNN leases?

The difference is how many of the three net expenses the tenant covers. In a single net (N) lease the tenant pays base rent plus property taxes. In a double net (NN) lease the tenant adds building insurance. In a triple net (NNN) lease the tenant pays all three: taxes, insurance, and common area maintenance. Base rent usually drops as the tenant takes on more of the expenses.

Does a NNN lease include utilities?

A NNN lease does not include utilities in the "three nets." Taxes, insurance, and CAM are the net charges the tenant reimburses, while utilities (electricity, gas, water, trash) are billed separately, usually direct from the provider or metered by the landlord. In single-tenant NNN buildings the tenant typically holds the utility accounts directly, so read the utilities clause to confirm who pays and how.

What is an absolute NNN lease?

An absolute NNN lease, sometimes called a bondable lease, is the most tenant-responsible structure: the tenant pays taxes, insurance, and CAM plus every other cost, including roof, structure, and major repairs, with no landlord obligations and no right to terminate or abate rent. It differs from a standard NNN lease, where the landlord often keeps roof and structural responsibility. Absolute NNN leases back the bond-like, single-tenant assets investors buy for hands-off income. The full comparison, including the casualty and condemnation clauses that decide the label, is in absolute NNN lease vs NNN lease.

What is a single tenant net lease?

A single tenant net lease is a net lease covering an entire property occupied by one tenant, most often on triple net or absolute net terms. Because one tenant carries the whole rent, the asset is really a credit instrument: the income is either fully in place or fully gone. Investors price it on the tenant credit, the remaining term, and the rent bumps rather than on leasing upside. We cover the structure and its risks in single tenant net lease explained.

Is a ground lease the same as a triple net lease?

No. A triple net lease is a lease of a building where the tenant reimburses taxes, insurance, and maintenance. A ground lease is a lease of the land, usually for 50 to 99 years, under which the tenant builds and owns the improvements until they revert to the landowner at expiration. Ground leases are frequently written on net terms, which is why the two get confused. See what a ground lease is for the distinction and how leasehold financing works.

What should you abstract from a NNN lease before you buy?

The rent schedule with its escalation mechanism, the recovery structure for each of the three nets, caps on controllable expenses and whether they are cumulative, the expense exclusions, the pro rata share, the landlord carve-outs for roof and structure, the guaranty and any burn-off, and every option including go-dark and early termination. Those fields are what NNN lease abstraction exists to capture, and missing any one of them changes the income you underwrote.

Reading NNN terms across a portfolio

One triple net lease is manageable by hand. A portfolio of them is not, because each lease passes through costs a little differently and the differences are exactly what move net operating income. Pulling the recovery structure, caps, exclusions, repair obligations, and options into a consistent abstract is what lets an owner bill recoveries correctly and a buyer price the asset accurately. The mechanics of truing up the pass-throughs each year are covered in how to do a CAM reconciliation, and the full field list a complete abstract carries is in the commercial lease abstract template. For the tool that reads every lease and links each field back to its clause, see our lease abstraction software.

Once the NNN terms are in hand, the pass-through taxes, insurance, and CAM bills the tenant reimburses still have to be processed and paid, and landlords who automate the accounts payable behind those operating expenses reconcile far faster at year end. If you are comparing structures before you sign, our explainers on NN vs NNN leases and gross lease vs net lease set out who pays what, and how to calculate triple net rent works the arithmetic through with a full example. Landlords running a gross or full service structure instead should start from gross lease abstraction.

The takeaway: triple net is not a single number, it is a structure with a lot of variable detail. Read the caps, the exclusions, and the repair carve-outs before you assume what net you actually keep.