What Is a Triple Net Lease? NNN Explained for Tenants and Landlords

A triple net lease, often written as NNN, is a commercial lease in which the tenant pays base rent plus the three nets: property taxes, building insurance, and common area maintenance (CAM). The landlord collects a relatively predictable rent, and the tenant carries most of the property's operating costs on top of it.

Last updated July 2026. This is general information, not legal advice. Commercial lease rules and terminology vary by state, by property type, and by how each lease is drafted, so have a real estate attorney review any lease before you sign.

The confusing part of commercial leasing is that the quoted rent rarely tells you what you will actually pay. A gross lease and a triple net lease can look similar on the first line of a term sheet and behave completely differently once the operating costs are added in. This guide explains what a triple net lease is, how it compares to a gross lease, who pays the property taxes, what the three nets cover, and the real pros and cons for a tenant. It also covers how a commercial lease gets signed once the terms are settled.

What is a triple net lease?

A triple net lease is a commercial lease structure where the tenant pays base rent plus three additional expense categories, called nets: property taxes, building insurance, and common area maintenance. The landlord passes these operating costs through to the tenant instead of building them into the rent, which makes NNN common for single-tenant and freestanding properties.

The name comes from those three nets. In a full triple net arrangement, the tenant is responsible for base rent and its share of all three, so the landlord's income is closer to a clean return with fewer variable costs to absorb. This is why NNN is the standard structure for freestanding retail (think a drugstore, a bank branch, or a fast food building) and other single-tenant properties, where one tenant occupies the whole site and can reasonably carry the whole cost of running it. On a multi-tenant property, each tenant usually pays a pro rata share of the nets based on the square footage it occupies. Because so much of the real cost lives in those pass-through categories rather than the headline rent, it helps to extract the key economic terms from the lease so nothing in the NNN math surprises you after you move in.

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

In a gross lease, the landlord pays the operating costs (taxes, insurance, and maintenance) out of the rent it collects, so the tenant pays one predictable number. In a triple net lease, the tenant pays a lower base rent but also pays those operating costs directly. A modified gross lease splits the costs between the two.

The trade-off is predictability versus control. Under a gross lease the tenant's payment is stable, but the landlord builds an estimate of the operating costs (and a cushion) into the rent. Under a triple net lease the tenant sees a lower base rent and pays actual costs, which can be cheaper but rises and falls with tax assessments, insurance premiums, and maintenance. Comparing two quotes only makes sense once you know which structure each one uses.

One caution when you compare quotes: a triple net base rent will almost always look lower than a gross rent for a similar space, because the operating costs are not in it yet. Add the estimated nets to the NNN base rent before you decide which deal is actually cheaper.

Who pays property taxes in a triple net lease?

In a triple net lease, the tenant pays the property taxes. That is the first of the three nets. On a single-tenant property the tenant typically covers the full real estate tax bill, and on a multi-tenant property each tenant pays a pro rata share based on the portion of the building it leases.

This is one of the biggest differences from a gross lease, where the landlord absorbs the tax bill. Because property taxes can rise when a jurisdiction reassesses the property or raises its rate, an NNN tenant carries that risk directly. Some leases let the tenant review the tax bills or protest an assessment, and some cap how much a controllable expense can increase in a year. Those protections are worth negotiating, so read the tax net closely rather than assuming it is a fixed number. When you review a lease agreement before signing, confirm exactly how the tax net is calculated and billed.

What is included in a triple net lease?

A triple net lease includes base rent plus the three nets: property taxes, building insurance, and common area maintenance (CAM). CAM typically covers upkeep of shared areas such as parking lots, landscaping, lighting, and structural or system maintenance depending on how the lease is written. The base rent is separate from all three.

Here is how the three nets break down.

Terminology varies, so read the definitions rather than the label. A single net lease usually passes through only property taxes, a double net (NN) lease passes through taxes and insurance, and an absolute net (sometimes called a bondable lease) can push essentially every cost, including major structural repairs and the roof, onto the tenant. The plain phrase triple net does not always mean the same list of responsibilities from one lease to the next, which is why the definitions section matters more than the name.

What are the pros and cons of a triple net lease for tenants?

For a tenant, the main advantage of a triple net lease is a lower base rent and more transparency into the actual operating costs, plus more control over how the property is maintained. The main disadvantage is exposure to variable and sometimes unpredictable expenses: taxes, insurance, and maintenance can all rise during the term.

On the plus side, a tenant paying the nets is not funding the landlord's padded estimate, and on a single-tenant site the tenant often controls maintenance decisions and vendors. On the minus side, the tenant absorbs cost increases it may not control, and an absolute net structure can even put a failing roof or HVAC system on the tenant. The practical protections to negotiate are a cap on annual increases in controllable expenses, the right to audit the landlord's CAM statements, a clear line between structural costs and routine upkeep, and a base year or expense stop if you can get one. Understanding the full structure before you sign is far cheaper than discovering it in year two. If you want the broader context, our guide on the difference between a lease agreement and other rental documents is a useful companion.

Can a commercial lease be signed electronically?

Yes. A commercial lease is a contract between businesses, so an electronic signature on it is valid and enforceable under the federal ESIGN Act and state UETA laws, with no notary required in the ordinary case. What matters in a dispute is provable agreement to the specific terms, which an electronic audit trail records cleanly with names, timestamps, and the exact document version.

Commercial leases are long, and a triple net lease adds exhibits for the CAM definitions, the expense schedules, and the tenant's pro rata share. Signing on paper means printing, initialing every page, scanning, and chasing signatures across the landlord, the tenant, and sometimes a guarantor. Doing it electronically keeps the full executed lease, every exhibit, and the audit trail in one place and dated. When the terms are settled, you can sign a commercial lease online and route it to every party in order without mailing anything. Ready to get your NNN lease executed? Send your commercial lease for signature with SignSend and capture every signature and initial in one place.

This guide is general information and not legal advice. Commercial lease structures, expense pass-throughs, and the meaning of net terms vary by state, by property, and by how each lease is drafted. Consult a qualified real estate attorney about your specific situation.