What Does a Landlord Pay in a Triple Net Lease?

How a Triple Net Lease Works

A triple net lease requires the tenant to pay three categories of operating expenses in addition to base rent. These three "nets" are the defining feature of the structure.

The first net is property taxes, meaning the annual real estate taxes assessed by local government. The second is insurance, which includes building and property insurance premiums covering hazard, liability, and casualty coverage. The third is maintenance, encompassing day-to-day upkeep, repairs, and common area maintenance (CAM) charges.

Because the tenant absorbs these operating costs, the base rent in an NNN lease is typically lower than in a gross lease for the same property. The landlord benefits from more predictable net income because fluctuations in operating expenses pass through to the tenant rather than eroding the landlord's returns.

NNN leases are most common in single-tenant retail properties. Pharmacies, fast-food restaurants, dollar stores, and auto parts retailers frequently operate under NNN lease structures. These leases also appear in office and industrial properties, though they are less prevalent in those sectors. For details on specific property types that commonly use NNN leases, see our Asset Classes Hub.

What the Tenant Pays in a Triple Net Lease

The tenant's financial obligations in an NNN lease extend well beyond the base rent. Understanding the full scope of tenant-paid expenses helps clarify what remains the landlord's responsibility.

Base rent is the agreed-upon monthly rental amount. Most NNN leases include annual escalation clauses, either as fixed percentage increases or adjustments tied to the Consumer Price Index (CPI).

Property taxes are paid by the tenant, either directly to the taxing authority or as a reimbursement to the landlord. These are assessed annually and often adjusted during year-end reconciliation.

Insurance premiums are the tenant's responsibility. The tenant typically secures and pays for building insurance, with the landlord named as an additional insured party on the policy.

Maintenance and CAM costs cover routine repairs, landscaping, parking lot upkeep, HVAC servicing, janitorial services, snow removal, and other standard operating expenses.

Utilities including electricity, water, gas, internet, and trash removal are also tenant-paid.

In multi-tenant NNN properties, operating expenses are typically allocated on a pro rata basis according to each tenant's share of the total leasable square footage.

What the Landlord Pays in a Triple Net Lease

Despite shifting three major expense categories to the tenant, landlords in a triple net lease retain several financial obligations. These costs can be significant and should be factored into any acquisition analysis or underwriting model.

Mortgage and Debt Service

If the property is financed, the landlord makes monthly mortgage payments covering principal and interest. Tenant rent offsets this cost but does not cover it directly. The mortgage is entirely the landlord's obligation regardless of lease structure.

Structural Repairs and Maintenance

The landlord is typically responsible for the building's structural integrity. This includes the roof (repairs, maintenance, and full replacement), the foundation, exterior and load-bearing walls, structural framing, and exterior cladding. Major utility infrastructure, such as replacement of primary plumbing lines, electrical panels, or sewer and water mains, also falls to the landlord. Routine HVAC servicing and interior plumbing fixtures are typically tenant responsibilities and are not included in this category.

Roof expense deserves particular attention. It is often the single largest landlord cost in an NNN lease, and the lease language determines exactly where the landlord's obligation begins and the tenant's ends. This topic is covered in detail below.

Capital Expenditures (CapEx)

Large-scale improvements or replacements that extend the useful life of the property are the landlord's responsibility. Common examples include full HVAC system replacement (as opposed to routine servicing, which the tenant handles), parking lot resurfacing or reconstruction (not patching or striping, which may fall under CAM), ADA compliance upgrades triggered by building code changes, and environmental remediation such as asbestos abatement or soil contamination cleanup.

Certain Insurance Obligations

While the tenant pays for building insurance, the landlord may need to carry umbrella or excess liability coverage, lender-required insurance if a mortgage exists, and loss-of-rent or business interruption insurance to cover income gaps during vacancy.

Vacancy Costs

When the property is unoccupied between tenants, the landlord absorbs all operating expenses. Property taxes, insurance, maintenance, and utilities all revert to the landlord's responsibility until a new tenant is secured. This is a meaningful risk factor, particularly for single-tenant NNN properties where there is no rent diversification.

Leasing Costs

Securing a new tenant involves broker commissions, tenant improvement (TI) allowances, and legal fees for lease negotiation. These transaction costs can represent a substantial one-time expense, especially for larger commercial properties or those requiring significant tenant buildout.

Why NNN Properties Appeal to 1031 Exchange and DST Investors

NNN properties are among the most popular replacement property types in 1031 exchanges, and for practical reasons.

Investors completing a 1031 exchange are often transitioning out of actively managed rental properties. NNN properties offer predictable income with minimal day-to-day management, making them well suited for investors who want to defer capital gains taxes under IRC Section 1031 while simultaneously reducing their operational involvement. The long lease terms typical of NNN properties, often ranging from 10 to 25 years, provide income stability throughout the exchange holding period. Creditworthy tenants such as national retailers, pharmacy chains, and fast-food operators further reduce default risk.

Many investors describe NNN acquisitions as a "retirement-grade" investment strategy: stable income, minimal landlord responsibilities, and a long-term lease backed by an established tenant. However, no investment is without risk, and suitability depends on individual financial circumstances. Investors should consult a qualified financial advisor.

Delaware Statutory Trusts (DSTs) frequently hold portfolios of NNN-leased properties. This structure gives 1031 exchange investors fractional access to institutional-quality NNN assets without the burden of direct ownership or active property management. For these investors, understanding exactly which landlord obligations remain is a critical part of the due diligence and underwriting process. To learn more about how NNN properties fit into a 1031 exchange strategy, see our Asset Classes Hub.

NNN vs. NN vs. N vs. Gross: Who Pays What

Not all net leases are the same. The "net" spectrum determines how much financial responsibility shifts from the landlord to the tenant, and the differences between lease types are significant.

Gross lease. The landlord bundles all operating costs into one higher rent amount. This is simpler for tenants and provides predictable occupancy costs, but the landlord bears all operating expense risk. If property taxes or insurance premiums increase, the landlord absorbs those increases entirely.

Single net (N). The tenant pays property taxes in addition to base rent. The landlord retains responsibility for insurance, maintenance, and structural items. Single net leases are relatively uncommon in current commercial real estate practice.

Double net (NN). The tenant pays property taxes and insurance. The landlord retains maintenance and structural responsibility. This structure appears more frequently in older multi-tenant retail properties.

Triple net (NNN). The tenant pays property taxes, insurance, and maintenance/CAM costs. The landlord retains responsibility for structural components and capital expenditures. This is the most common structure for single-tenant retail investment properties.

Absolute NNN, also called bondable. The tenant is responsible for every expense associated with the property, including roof replacement and structural repairs. The landlord's only remaining obligation is the mortgage. These are the most passive NNN investments and typically involve investment-grade tenants such as Walgreens, McDonald's, or Dollar General. The term "bondable" reflects the fact that the landlord's income stream is nearly as predictable as a bond coupon.

The critical takeaway: the term "triple net" is used broadly across commercial real estate, but the actual allocation of costs varies significantly based on lease language. Always read the specific lease agreement rather than relying on general assumptions about what "NNN" means. For a detailed overview of NNN lease structures, see our Triple Net Lease Guide.

Roof Replacement: Landlord vs. Tenant Responsibility

Roof repair and replacement is one of the most debated and frequently misunderstood expenses in NNN leasing. The answer depends entirely on the lease structure and the specific contract language.

Standard NNN lease. The landlord is typically responsible for roof replacement and major structural roof repairs. The tenant handles routine maintenance, which includes periodic inspections, minor patching, gutter cleaning, and preventive upkeep. The line between "routine maintenance" and "major repair" is where most disputes arise, which is why precise lease language matters.

Modified NNN or double net lease. Roof responsibility may be shared between landlord and tenant. Some leases include a "roof cap" provision, where the tenant pays for roof maintenance up to a specified dollar amount per year and the landlord covers anything above that threshold. This approach distributes the risk rather than assigning it entirely to one party.

Absolute NNN or bondable lease. The tenant is responsible for everything, including full roof replacement. This is the exception rather than the standard arrangement, and it is typically found only in leases with investment-grade national tenants.

The financial stakes are meaningful. Commercial roof replacement costs generally range from $5 to $15 or more per square foot, depending on roofing material and building size. For a 10,000-square-foot retail building, that translates to $50,000 to $150,000, a cost that directly affects the landlord's return on investment if not budgeted in advance.

Before acquiring any NNN property, review the roof's age, current condition, and estimated remaining useful life. Budget for replacement reserves accordingly. Read the lease language carefully to understand exactly where the landlord's financial responsibility begins and the tenant's ends.

CAM Charges and Expense Reconciliation

In multi-tenant NNN properties, Common Area Maintenance (CAM) charges are allocated among tenants based on their pro rata share of the total leasable space. A tenant occupying 20% of a building's square footage would pay 20% of total CAM expenses.

CAM typically covers landscaping, parking lot maintenance and lighting, snow removal, security, common area janitorial services, shared HVAC for common areas, and property management fees.

Controllable vs. Uncontrollable Expenses

Controllable expenses are costs the landlord or property manager can influence, such as landscaping, janitorial services, and supplies. Uncontrollable expenses are those outside the landlord's direct control, including property taxes, insurance premiums, and utility rate increases. Many leases distinguish between these categories and may cap annual increases on controllable expenses to protect tenants from excessive cost growth.

Annual Reconciliation

Tenants typically pay estimated CAM charges on a monthly basis throughout the year. At year-end, actual expenses are reconciled against those estimates. If actual costs exceeded the estimates, the tenant owes the difference. If actual costs came in below the estimates, the tenant receives a credit. This reconciliation process, sometimes called a "true-up," ensures that tenants ultimately pay their share of actual operating costs rather than inflated projections.

Management Fees

In multi-tenant NNN properties, the landlord or property manager typically charges a management fee, generally ranging from 3% to 8% of collected rent, that is included in CAM pass-throughs. This fee compensates for property oversight and administrative work.

Single-Tenant NNN Properties

CAM reconciliation is considerably simpler in a single-tenant arrangement. The one tenant covers all operating expenses directly, and there is no pro rata allocation to calculate or reconcile.

Frequently Asked Questions

Conclusion

Triple net leases shift most day-to-day operating costs to the tenant, but landlords retain meaningful financial responsibilities. Structural repairs, capital expenditures, mortgage payments, vacancy-period expenses, and leasing costs all remain on the landlord's side of the ledger and must be budgeted accordingly.

The exact division of costs depends entirely on the lease language. "Triple net" describes a spectrum of arrangements, not a single uniform standard. Before acquiring an NNN property or entering into an NNN lease, investors should read every clause of the lease agreement, assess the property's physical condition, and establish reserves for structural maintenance and capital replacement.

For investors seeking NNN exposure without direct landlord responsibilities, DSTs offer a passive alternative with institutional-grade triple net properties. With 1,500+ real estate transactions across our team, Anchor1031 provides access to NNN-focused offerings through our DST marketplace. Schedule a consultation to explore what is currently available.

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