In a triple net lease, the landlord pays only the mortgage, property taxes, and insurance—the tenant covers everything else

A triple net lease (also called an NNN lease) shifts most operating costs to the tenant. The landlord's responsibility shrinks to three things: the mortgage payment on the building, property taxes, and building insurance. The tenant pays the remaining costs—utilities, maintenance, repairs, property management, and often a share of common area expenses. This structure is common in commercial real estate, especially for retail spaces, office buildings, and industrial properties.

The appeal to landlords is predictable income with minimal involvement. The tenant essentially operates the property and covers its upkeep. But the trade-off is that the rent itself is usually lower than it would be under a gross lease, where the landlord covers most costs. Understanding what you actually pay as a landlord under this arrangement requires looking at each category separately.

Key Takeaways

  • The landlord pays the mortgage principal and interest, property tax bill, and the building's hazard insurance premium.
  • The tenant pays utilities, maintenance, repairs, janitorial services, and often a proportional share of common area costs.
  • The lease specifies which party pays for capital improvements (major renovations) and which covers routine maintenance.
  • Property tax increases and insurance rate hikes directly reduce the landlord's profit, since rent is fixed and the tenant does not share these costs.
  • Triple net leases work best for landlords who want passive income but require careful lease language to avoid disputes over what counts as maintenance versus improvement.

The Three Costs the Landlord Covers

The mortgage payment is the landlord's largest obligation. This includes both principal and interest on the loan used to purchase or refinance the building. If the property is owned outright with no mortgage, this cost is zero, but the landlord still owns the building and bears the risk if it loses value.

Property taxes are the second cost. The landlord receives the tax bill from the county or municipality and must pay it in full. These taxes are based on the assessed value of the land and building, not on the lease rate or the tenant's income. If property values rise in the area, the tax bill rises—and the landlord absorbs that increase. The tenant does not reimburse the landlord for tax increases.

Building insurance (also called hazard or property insurance) is the third cost. This covers damage to the structure itself from fire, weather, theft, or other covered events. The landlord typically names the insurance company as the loss payee, meaning any insurance payout goes to the landlord first to cover the mortgage lender's interest. The tenant may be required to carry liability insurance for their own operations, but the building's structural insurance is the landlord's responsibility.

What the Tenant Pays Instead

The tenant covers operating expenses, which can be substantial. Utilities—electricity, gas, water, sewer, trash—are almost always the tenant's cost. So are routine maintenance and repairs: HVAC servicing, roof repairs, parking lot patching, plumbing fixes, and painting. The tenant also pays for janitorial services, landscaping, and security if those are provided.

In multi-tenant buildings, the lease usually requires the tenant to pay a proportional share of common area maintenance—hallways, lobbies, parking structures, and exterior grounds. This is often calculated as a percentage of the tenant's square footage divided by the total rentable square footage. If the building has 100,000 square feet and the tenant leases 10,000 square feet, they pay 10 percent of common area costs.

The lease language determines who pays for capital improvements—major work like roof replacement, foundation repair, or HVAC system replacement. Some leases require the tenant to pay; others split the cost; still others make it the landlord's responsibility. This is a major negotiation point and should be spelled out clearly in the lease.

How Triple Net Leases Affect Landlord Profit

The rent in a triple net lease is lower than in a gross lease because the tenant is absorbing operating costs. A landlord might charge $20 per square foot annually in a triple net lease but $30 per square foot in a gross lease where the landlord covers utilities and maintenance. The trade-off is that the landlord's expenses are predictable and low.

However, the landlord's profit is vulnerable to two things outside the lease: property tax increases and insurance rate increases. If the county reassesses the property and raises the tax bill by $5,000 per year, the landlord's profit drops by $5,000—the tenant does not share this burden. Similarly, if the insurance company raises the premium by $3,000, that comes directly out of the landlord's pocket. Over a 10-year lease, these increases can be substantial.

Some landlords negotiate lease language that allows them to pass through tax and insurance increases to the tenant, but this is less common and usually requires the tenant to accept a higher base rent in exchange. Without this clause, the landlord bears the full risk of rising taxes and insurance costs.

Common Disputes Over What the Landlord Pays

The biggest source of conflict in triple net leases is the line between maintenance and capital improvement. If the roof develops a small leak and needs patching, that is maintenance—the tenant pays. If the entire roof needs replacement because it has reached the end of its life, that is a capital improvement—and the lease determines who pays. If the lease is silent on this, disputes can be expensive and time-consuming.

Another common issue is the definition of "common area." In a shopping center, does the parking lot count? What about the landscaping around the building? If the lease says the tenant pays a share of common area maintenance but does not define common area, the tenant may refuse to pay for parking lot repairs, claiming it is the landlord's responsibility. Clear lease language prevents this.

Insurance is a third area of dispute. Some tenants assume they do not need liability insurance because the landlord carries building insurance. In reality, the tenant should carry commercial general liability insurance to cover injuries or damage caused by the tenant's operations. If the lease does not require this, the landlord may end up uninsured for certain claims.

Comparing Triple Net to Other Lease Structures

In a gross lease, the landlord covers most operating costs and the tenant pays a single rent amount. The landlord's expenses are higher, but the rent is higher too, and the landlord controls maintenance quality. In a modified gross lease, the landlord and tenant split certain costs—for example, the landlord pays base utilities and the tenant pays overages, or the landlord pays property tax up to a certain amount and the tenant pays increases above that threshold.

A triple net lease gives the landlord the lowest operating costs but the least control. The tenant has an incentive to defer maintenance to save money, which can damage the building over time. A gross lease gives the landlord more control but higher expenses and lower profit margins. The choice depends on the landlord's preference for involvement and risk tolerance.

How to Structure a Triple Net Lease to Protect Your Interests

Define every cost category in writing. Specify which party pays for roof replacement, foundation repair, parking lot resurfacing, and HVAC replacement. Do not assume the tenant will interpret "maintenance" the same way you do. Include a clause that requires the tenant to maintain the property in good condition and prohibits deferred maintenance.

Consider negotiating a clause that allows you to pass through tax and insurance increases above a certain threshold. For example, you might agree that the tenant pays their proportional share of property tax increases above 5 percent in any year. This protects you if the county reassesses the property upward.

Require the tenant to carry liability insurance and name you as an additional insured on their policy. This protects you if someone is injured on the tenant's space due to the tenant's negligence. Also require the tenant to provide proof of insurance annually.

Include a clause that requires the tenant to pay for repairs within a certain timeframe—for example, within 30 days of notice. This prevents the tenant from ignoring a broken HVAC system or a leaking pipe, which could cause further damage.

Frequently Asked Questions

Can I pass through property tax increases to the tenant?

Only if the lease says so. In a standard triple net lease, the landlord pays property taxes in full regardless of increases. Some leases include a "tax stop" clause that requires the tenant to pay their share of taxes above a baseline year, but this must be negotiated upfront. Without this clause, rising taxes reduce your profit.

What if the tenant stops paying for maintenance?

The lease should include a clause allowing you to perform the maintenance yourself and bill the tenant, or to deduct the cost from the security deposit. You can also include language that allows you to terminate the lease if the tenant fails to maintain the property. Document all maintenance requests in writing and keep records of the tenant's response.

Who pays if a major system like the HVAC fails?

The lease determines this. If it says the tenant pays for all repairs, they pay. If it says the landlord pays for capital improvements, you pay. If the lease is silent, you may end up in court. Always specify in the lease whether major system replacement is the tenant's or landlord's responsibility.

Do I need to carry liability insurance in addition to property insurance?

Property insurance covers the building structure. Liability insurance covers injuries or damage claims. Most landlords carry both. You should also require the tenant to carry liability insurance for their operations. This protects both parties if someone is injured on the property.

What happens if the tenant's business fails and they stop paying rent?

You have the same remedies as in any lease: you can serve notice to cure or quit, and if the tenant does not pay, you can file for eviction. The triple net structure does not change your rights as a landlord. However, if the tenant stops paying, they may also stop maintaining the property, so include language that allows you to perform maintenance and deduct it from rent.