A triple net lease (NNN) is a lease in which the tenant pays the property’s three major expense categories — real estate taxes, insurance, and maintenance — in addition to rent. The landlord receives rent largely free of operating obligations, which is why NNN properties are real estate’s closest approximation of a bond.
How triple net leases work
The “nets” are the expense categories passed to the tenant; a net lease can pass one (single net: taxes), two (double net: taxes and insurance), or all three. In the pure form — often called absolute net — the tenant handles everything including roof and structure, and the landlord’s role reduces to collecting rent and monitoring compliance. Typical NNN deals involve freestanding, single-tenant buildings — pharmacies, quick-service restaurants, dollar stores, distribution facilities — leased for long initial terms (10–25 years) with contractual rent escalations and renewal options.
The economics follow from the structure. Income is predictable and expense-insulated: property tax hikes and repair bills belong to the tenant. The valuation logic is credit-driven — the property is priced substantially on the strength of the lease and the tenant behind it, so cap rates on NNN assets track tenant credit quality and remaining lease term as much as real estate fundamentals. A property with 20 years of investment-grade lease term trades like a corporate bond with a building attached; the same building with 3 years remaining trades on its re-leasing prospects.
The risk that hides in the simplicity
NNN’s passivity concentrates rather than eliminates risk. Single-tenant binary exposure is the big one: occupancy is 100% or 0%, and a tenant bankruptcy or non-renewal converts a bond-like asset into a vacant box with carrying costs — the “dark store” problem, where re-leasing often requires re-tenanting capital and rent concessions, and where buildings purpose-built for one user (a bank branch, a specific restaurant format) carry real repositioning risk. Duration risk is the quieter one: long, flat-or-slow-escalating leases behave like long bonds, losing relative value when rates rise, and fixed escalations can lag inflation for decades. Residual value — what the real estate is worth when the lease ends — is the discipline that separates good NNN underwriting from lease-buying.
The sector’s investment vehicles span the access spectrum: public net-lease REITs, non-traded REITs with net-lease strategies, DSTs holding single-tenant assets (a natural 1031 fit given the passive management), and direct ownership — the classic endpoint for exchange investors who want mailbox income with a deed. Sale-leasebacks are the sector’s supply engine, converting corporate-owned real estate into investable NNN product. Portfolio metrics worth checking in any vehicle: WALT, tenant credit mix and concentration, escalation structure, and lease expirations against debt maturities.
FAQ
What does triple net lease mean?
The tenant pays the three major property expenses — taxes, insurance, and maintenance — on top of base rent, leaving the landlord with largely passive income.
What's the difference between NNN and a gross lease?
They’re opposites: in a gross lease the landlord pays operating expenses out of the rent; in a triple net lease the tenant bears them. Modified gross structures split categories in between.
Why do investors like triple net properties?
Long leases, contractual escalations, minimal management, and expense insulation — income quality that resembles fixed income, often with 1031 compatibility and financing-friendly cash flows.
What are the main risks of NNN investing?
Tenant credit and renewal risk on single-tenant assets, rate sensitivity of long flat leases, and residual value when the lease ends. The lease makes the income; the tenant and the box determine whether it lasts.
Related terms
Net Lease · Sale-Leaseback · WALT · Cap Rate · Ground Lease · Delaware Statutory Trust (DST)
Educational content only; not investment, tax, or legal advice. Consult qualified professionals regarding your specific circumstances.
