What a NNN Lease Actually Is, and the Different Kinds of Commercial Leases That Exist

By Cole Borror · Director of Acquisitions, Sierra Capital Club · Reviewed September 2026

The short answer: In a triple net (NNN) lease, the tenant typically pays base rent plus the property's real estate taxes, building insurance, and maintenance or operating expenses. It sits on a spectrum that runs from gross leases, where the landlord pays nearly everything, through single net, double net, and triple net, to absolute net and ground leases, where the tenant carries almost all property costs. None of those labels is standardized. The executed lease decides who actually pays for what.

In this article

1. The three-letter label that pretends to be a complete answer
2. What the three nets actually mean
3. Every commercial lease type in one view
4. Why the label is not the lease
5. Same rent, same cap rate, three different deals
6. What "absolute" should make you check
7. What still lands on the landlord
8. Seven clauses to read before calling a deal passive
9. FAQ

The Three-Letter Label That Pretends to Be a Complete Answer

NNN is one of commercial real estate's most useful shortcuts, and one of its most abused.

Here is how the abuse usually goes. A listing says "NNN." The buyer reads that as "the tenant pays everything, I collect a check." Then the roof fails in year four, the lease says the landlord replaces it, and the "passive" 6% deal is a 4% deal for a while.

The baseline is real: in a triple net lease, the tenant commonly pays base rent plus property taxes, building insurance, and maintenance or operating expenses. But NNN is a category, not a description of risk. It tells you which broad expense buckets moved to the tenant. It does not tell you who replaces the roof, what happens after a fire, or whether rent can stop.

Below is where NNN sits among every other commercial lease type you will run into, from gross to ground lease, and where to look in the lease so you never have to trust the acronym again.

What the Three Nets Actually Mean

Each "N" stands for one category of property expense that the tenant pays on top of base rent.

First net: property taxes. The tenant pays, or reimburses the landlord for, real estate taxes and assessments. In a single-tenant building that is the full bill; in a multi-tenant center it is an allocated share.

Second net: building insurance. The landlord's property policy on the building itself. This is separate from the tenant's own liability, contents, and business-interruption coverage, which the tenant carries under any lease type.

Third net: maintenance and operating expenses. Landscaping, snow removal, parking lot upkeep, exterior lighting, shared systems, and common-area services.

Utilities and janitorial are frequently tenant costs too, but they are not what the three Ns traditionally count. Cornell's Legal Information Institute describes the same progression: single net adds taxes, double net adds insurance, triple net adds CAM "and sometimes other costs such as utilities or repairs."

One mechanical point. Some leases have the tenant pay taxes and insurance directly. Others have the landlord pay and bill the tenant back through monthly estimates trued up annually. Either way the expense is net to the landlord. Direct payment versus reimbursement does not change the category.

Every Commercial Lease Type in One View

Think of commercial leases as a dial. On one end the landlord pays almost everything and the tenant writes one check. On the other end the tenant pays almost everything and the landlord's job is to cash the check and read the mail. Every lease type is a setting on that dial. Here is the comparison people usually have to hunt across five pages to assemble. Treat it as common market usage, not law. Every row has exceptions.

A few notes on the ends of the dial.

Gross and modified gross are the office and small-bay retail world. The landlord operates the building and prices the expenses into rent, sometimes with the tenant paying increases over a "base year." They are not the subject of this article, but you need them on the dial to see what NNN is a departure from.

Ground leases are a different animal. What is being leased is the dirt, not a building. The tenant typically constructs its own improvements, so it naturally carries every cost on the property. That makes a ground lease functionally absolute net, but its real distinguishing features are term length, leasehold financing, and who owns the building at the end. Those are structure questions, covered in nine ways net lease deals get done, not expense-allocation questions.

Two caveats on the middle of the table. Brokers use "NN" loosely: in the net lease market it often means a modified NNN lease where the tenant pays CAM but the landlord keeps roof and structure, which is not the textbook definition. And some sources treat absolute net and bondable as synonyms, while others reserve "bondable" for the strongest form, where the tenant must rebuild after a casualty and keep paying rent no matter what. At least one SEC-filed offering document draws exactly that line between bondable and ordinary NNN leases.

Why the Label Is Not the Lease

Respected industry sources disagree with each other about what NNN means, which should tell you something.

NAIOP's 2024 terms and definitions guide defines a triple net lease as one where the tenant pays "taxes, maintenance and property insurance as well as all operating costs," then adds that the landlord "is typically responsible for the roof, HVAC, structure and sometimes the parking lot." Other net lease sources, including Northmarq, describe a true NNN lease as including roof and structure. Both are credible. They are just describing different leases that happen to share a label.

The trouble word is "maintenance." Routine service, repair, capital replacement, and rebuilding after a casualty are four different obligations with four different price tags. A flyer collapses them into one bucket. The lease does not. A tenant can be responsible for "maintaining" the HVAC and still hand the landlord a $40,000 replacement bill when the unit dies, because maintenance and replacement were defined separately.

The practical rule: the flyer and the offering memorandum summarize the deal. The executed lease allocates the risk. NNN is the label on the file folder, not the contents of the file.

The right question is not, "Is this lease NNN?" It is, "Who pays for this item, under this clause, in this circumstance?"

Same Rent, Same Cap Rate, Three Different Deals

Here is a hypothetical that shows why the label is not enough. Three freestanding retail buildings, each priced at $2,000,000 with $120,000 of annual rent. All three get marketed at a 6.0% cap rate. All three are called "NNN" in the listing.

Property A: NNN with landlord roof and structure. The tenant pays taxes, insurance, and all maintenance, but the lease leaves roof and structure with the landlord. The roof is 18 years old. Assume a $25,000 replacement in year four. Over a ten-year hold the landlord collects $1,200,000 of rent and spends $25,000, a 5.9% average yield instead of 6.0%. Not fatal. The real issue is that the landlord holds an unpriced obligation that could be $25,000 or $60,000 depending on what an inspection finds.

Property B: tenant has roof, but rent abates after casualty. Roof and structure sit with the tenant, so this looks stronger than A. But rent abates while the building is unusable, and the landlord controls restoration using insurance proceeds. A kitchen fire takes the building offline for eight months. That is $80,000 of rent gone, plus any gap between insurance proceeds and rebuild cost, plus the risk the tenant exercises a termination right if restoration runs long.

Property C: absolute net with narrow exceptions. The tenant pays everything at the property level, replaces the roof, rebuilds after casualty whether or not proceeds cover it, and pays rent without abatement or setoff. The landlord's carve-outs are its own debt service, income taxes, and financing costs. What remains is tenant credit and the cost of enforcing the lease.

All three are "6% NNN deals." Only one is close to the passive check the label implies, and you only know which by reading the repair, casualty, and rent clauses.

What "Absolute" Should Make You Check

"Absolute net" is a superlative, and superlatives should trigger a checklist, not relief. It does not mean every expense in existence. It means an intent to make rent net to the landlord across nearly all property-level events, subject to whatever exceptions were negotiated. Test these:

Roof and structure. Does the tenant repair and replace, or only perform routine maintenance? Look for the word "replace."

Capital replacements. Who pays for HVAC, paving, utility lines, code-required upgrades, and major building systems? Is there a dollar cap or an end-of-term amortization formula?

Casualty. Must the tenant rebuild even if insurance proceeds are insufficient? Does the tenant get a termination right if damage occurs in the last few years of the term?

Condemnation. If the government takes part of the parking lot, can the tenant terminate or reduce rent?

Rent obligation. Is rent payable without abatement, deduction, setoff, or termination? A publicly filed absolute net lease between NHI and National HealthCare Corporation puts it plainly: the tenant pays "without abatement, deduction or set-off" and is not entitled to "any abatement, reduction, suspension or deferment of the Rent." That is the language you want to see.

Express exclusions. Even a lease that calls itself absolute will carve things out. In a filed "absolute triple net" bank branch lease, the tenant takes on roof, foundation, HVAC, and all capital improvements, but the landlord's mortgage interest and principal, income and franchise taxes, lease preparation costs, and refinancing costs are expressly excluded. Those are ordinary and reasonable exclusions. The point is that you find them in the lease, not on the flyer.

What Still Lands on the Landlord

Shifting cost is not the same as shifting ownership. Even under a lease where the tenant has taken every property expense, the landlord may still carry lender compliance and reporting, title matters, lease administration, and the job of confirming the tenant actually renewed its insurance and paid the tax bill. Some legal duties to third parties cannot be delegated by contract at all. And when the tenant simply fails to perform, every obligation that was "the tenant's problem" becomes the landlord's problem again, along with the legal cost of enforcing it.

Tenant credit, vacancy, rollover, and residual value are never on any list of nets. A lease can be absolutely net and still be a bad investment because the tenant is thin or the building has no second user. That is the subject of the corporate versus franchisee guaranty article, and it matters more than which expenses got allocated.

Seven Clauses to Read Before Calling a Deal "Passive"

If you only have thirty minutes with a lease, spend them here.

1. Repairs and maintenance. Find where routine work ends and replacement or capital improvement begins. Those are usually separate paragraphs with separate obligors.
2. Roof, structure, and building systems. Check both who is responsible and whether there is a dollar cap, a useful-life amortization, or a landlord contribution.
3. Operating expenses and CAM. Review inclusions, exclusions, administrative fees, allocation formulas, annual caps, and audit rights. This is where multi-tenant deals leak.
4. Taxes and insurance. Confirm payment method, reassessment exposure on sale, deductibles, and required coverage. A reassessment at your purchase price can sharply raise the tax bill the tenant now pays, which strains their rent coverage even if it does not touch your rent.
5. Casualty and condemnation. Identify restoration duties, termination rights, and rent abatement. This is where Property B above went wrong.
6. Default, assignment, and guaranty. Determine which entity actually owes these obligations and what happens if it fails or assigns the lease to a weaker successor.
7. Surrender and end-of-term condition. Find the standard for returning the property. A tenant that must return the building "in the condition received, ordinary wear excepted" and a tenant that must return it "in good condition and repair" are handing you two different buildings.

The clause I see buyers skip most often is the surrender clause. Everyone reads the roof paragraph. Almost nobody reads what condition the building has to be in on the last day of the term, and that is where fifteen years of deferred maintenance quietly becomes the landlord's cost.

Two warnings to close. For investors: passing costs through does not remove credit risk, vacancy, rollover, or the need to enforce the lease. For tenants: a low quoted base rent can hide a volatile all-in occupancy cost, and the "N" that matters most is the one you did not notice you agreed to.

On any specific deal, have a commercial real estate attorney licensed in the property's state read the lease. This article is education, not legal advice.

Count the Obligations, Not the Ns

The dial, cleanly:

Gross means the landlord pays and prices it in. Modified gross splits expenses by negotiation. Single net adds taxes to the tenant, NN adds insurance, NNN adds maintenance or operating expenses. Absolute net commonly adds structural and capital responsibility. Bondable language tests what happens when the property is damaged, taken, or unusable. A ground lease hands the tenant the dirt and lets it build the rest.

Every one of those statements is a starting presumption, not the last word. A serious buyer or tenant does not underwrite the acronym. They underwrite the obligations behind it.

Once you have the obligations mapped, the next questions are who is actually promising to pay (corporate vs. franchisee guaranty), how you verify the lease facts before closing (estoppels and SNDAs in plain English), and how the lease came to exist in the first place (nine ways net lease deals get done). And if you are pricing the deal off the cap rate alone, read why cap rate is not a return before you do.

Frequently Asked Questions

Is a NNN lease maintenance-free for the landlord? Usually not entirely. The tenant typically handles routine maintenance and operating expenses, but many NNN leases leave roof, structure, or major system replacement with the landlord. The lease's repair clause, not the label, tells you.

Who replaces the roof in a NNN lease? It depends on the lease. In a standard NNN lease the landlord often retains roof and structure. In an absolute net lease the tenant usually does. Look for the words "repair" and "replace" in the roof and structure paragraph and confirm which party each verb attaches to.

Is absolute net the same as triple net? No. Absolute net is generally a stronger form of triple net in which the tenant also takes roof, structure, and capital replacements, and often pays rent without abatement. The terms are not standardized, so verify the specific obligations rather than relying on either label.

What happens to rent after a casualty or condemnation? It varies. Some leases abate rent while the building is unusable and give the tenant a termination right. Bondable or true absolute net leases require the tenant to keep paying and to restore the property. Read the casualty and condemnation sections together with the rent clause.

Is a ground lease the same as a NNN lease? Not quite. A ground lease covers land only, and the tenant usually builds and maintains its own improvements, so it behaves like an absolute net lease on the tenant's cost side. What sets it apart is the long term, leasehold financing, and the landlord's reversion of the building at expiration.

Related reading in this series

• Cap rate is not a return: what it actually tells you
• Corporate guaranty vs. franchisee guaranty: what you're actually buying
• Estoppels and SNDAs in plain English
• Nine ways a net lease deal actually gets done
• Sale-leasebacks from the operator's side of the table
• PropCo/OpCo separation: an operator's guide
• The 1031 exchange timeline that kills deals
• How to underwrite a c-store net lease

About the author. Cole Borror is Director of Acquisitions at Sierra Capital Club, a Dallas-based net lease investment and development firm. He works on NNN and NN acquisitions, build-to-suit development, sale-leasebacks, and operator partnerships, and has read more leases than he would like to admit. Connect at coleborror.com.

This article is for educational purposes only and is not legal, tax, or investment advice. Lease terminology and obligations vary by document and jurisdiction. Consult a licensed commercial real estate attorney in the property's state before relying on any lease interpretation.