A net lease is a commercial real estate agreement in which the tenant pays base rent plus some or all of the property’s operating costs — property taxes, insurance, and maintenance — rather than rolling those costs into a single bundled payment to the landlord. The four main variants (single, double, triple, and absolute net) differ by how many of those cost categories shift from the owner to the occupant. Which version you sign determines who absorbs rising taxes, who pays when the roof leaks, and how much financial risk you carry over the life of the agreement.
How a Net Lease Differs From a Gross Lease
In a gross lease, the tenant pays one flat amount each month and the landlord covers all property-related costs out of that payment. If property taxes spike or insurance premiums jump, the landlord absorbs the increase. A net lease separates the base rent from those fluctuating costs. The tenant pays a lower base rent and takes on specific operating expenses, paying them either directly to the taxing authority, insurer, or vendor, or reimbursing the landlord.
That separation gives landlords a steadier income stream because rising property costs don’t eat into their returns. For tenants, the tradeoff is transparency. You see exactly what you’re spending on taxes, insurance, and upkeep rather than having those amounts buried in an inflated rent figure. The base rent per square foot in a net lease is typically lower than what a comparable gross lease would charge, precisely because the tenant is picking up the additional expenses separately.
Single Net Lease
A single net lease (sometimes called an “N” lease) is the most basic form. The tenant pays base rent plus the property taxes assessed by the local government. The landlord keeps responsibility for everything else, including insurance premiums, building maintenance, and structural repairs.
Single net leases are uncommon in modern commercial real estate because they transfer so little risk away from the landlord. They occasionally appear as a middle ground when an owner wants property tax payments handled directly by the occupant while retaining full control over the building’s physical condition and insurance coverage.
Double Net Lease
A double net lease (or “NN” lease) adds insurance premiums to the tenant’s obligations. On top of base rent and property taxes, the tenant pays the annual cost of insuring the building. These payments go directly to the insurance carrier or taxing authority rather than being funneled through the landlord.
The landlord still handles the building’s structural integrity and the maintenance of shared spaces. In a shopping center, for example, the owner would continue to pay for major repairs to the roof, foundation, or common walkways. Keeping those duties protects the long-term value of the property while shifting the more volatile annual operating costs to the tenant.
Triple Net Lease
The triple net lease (NNN) is the most widely used net lease structure for freestanding commercial buildings and retail centers. The tenant pays base rent plus property taxes, insurance, and common area maintenance (CAM) charges. CAM covers day-to-day operational costs of the property and surrounding grounds, including:
- Parking lot repairs such as repaving, striping, and pothole filling
- Landscaping, including seasonal planting, irrigation, and snow removal
- Common space upkeep like lobby cleaning, exterior lighting, and shared restroom maintenance
- Security services and utilities for shared areas
Triple net leases typically run 10 to 15 years, though some extend much longer, particularly for national retail brands.1Legal Information Institute (LII) / Cornell Law School. Triple Net Lease The length of the term matters because it determines how long the tenant bears the risk of rising costs and how long the landlord enjoys a stable, hands-off income stream.
How CAM Charges Are Calculated
Landlords usually prepare an annual budget estimating CAM costs for the entire property. Each tenant pays a proportional share based on the square footage they occupy relative to the total leasable space. If your unit is 3,000 square feet in a 30,000-square-foot building, you’d pay roughly 10% of the total CAM budget. At the end of each year, the landlord reconciles estimated charges against actual expenses. If the real costs came in higher than the estimate, you owe the difference. If they came in lower, you receive a credit.
Capital Improvements vs. Routine Maintenance
The most common source of disputes in triple net leases is the line between routine maintenance, which the tenant pays for, and capital improvements, which generally remain the landlord’s responsibility. Routine maintenance includes servicing an HVAC system, patching a small roof leak, or repainting common areas. A capital improvement adds lasting value or replaces a major structural element: a full roof replacement, a new HVAC system, or foundation work.
No single legal standard draws a bright line between the two categories. The distinction depends almost entirely on how the lease is drafted. Vague language gives landlords room to pass capital costs through as maintenance expenses, and gives tenants room to argue those same costs belong to the owner. The best protection on both sides is precise lease language specifying dollar thresholds, listing which systems are tenant-maintained versus landlord-replaced, and defining what qualifies as a capital expenditure.
CAM Audit Rights
Because CAM reconciliation relies on the landlord’s accounting, tenants should negotiate audit rights into the lease. An audit right lets you, or an accountant you hire, review the landlord’s invoices, vendor contracts, tax assessments, and insurance statements to verify that the charges billed match what the lease permits. Common issues uncovered in audits include double-billed expenses, incorrect square footage used for your proportional share, and costs that don’t qualify as CAM under the lease, such as capital improvements or legal fees unrelated to property management.
Most audit clauses give tenants 30 to 90 days after receiving the annual reconciliation statement to request supporting documentation and initiate an audit. Leases often allow a lookback period of one to three years, meaning you can recover overcharges from prior periods as well. A well-drafted clause also requires the landlord to reimburse your audit costs if the overcharge exceeds a specified threshold, commonly 3% to 5% of the total billed amount.
Absolute Net Lease
An absolute net lease (also called a bondable lease) goes further than a triple net by transferring virtually all property risk to the tenant. In addition to taxes, insurance, and CAM, the tenant bears responsibility for major structural failures, including full roof replacement and foundation repair. Even if the building suffers severe damage from a fire or natural disaster, the tenant remains obligated to continue paying rent and to fund the restoration.
This structure often includes a “hell or high water” clause, which means the tenant’s obligation to pay rent is absolute and unconditional regardless of what happens to the property. Courts and the Uniform Commercial Code recognize these provisions, particularly in financing-related lease transactions, making them enforceable even in extreme circumstances. The landlord functions as a completely passive investor, collecting rent with no management duties.
Absolute net leases are typically limited to long-term arrangements of 15 to 25 years with financially strong tenants: national retailers, pharmacy chains, or fast-food franchises that have the resources to manage extensive property liabilities. They appeal to institutional investors looking for bond-like returns from real estate.
Rent Escalation Over the Lease Term
Net leases spanning 10 or more years almost always include a mechanism for increasing the base rent over time. Without escalation, inflation would erode the landlord’s real return. The three most common approaches are fixed increases, CPI-linked adjustments, and percentage rent.
Fixed increases specify a set dollar amount or percentage increase at regular intervals, such as a 2% bump every year or a $1.00 per-square-foot increase every five years. This is the simplest method and gives both parties certainty about future costs.
CPI-linked adjustments tie the annual rent change to movement in the Consumer Price Index. If the CPI rises 3% in a given year, the rent rises 3%. Tenants should negotiate a cap on annual CPI increases to avoid sharp jumps during periods of high inflation.
Percentage rent, common in retail leases, adds a percentage of the tenant’s gross sales on top of the base rent, usually after sales exceed a specified threshold called a “breakpoint.” The lease should clearly define what counts as gross sales and whether online sales or returns are excluded.
Who Benefits and Who Takes the Risk
The appeal of a net lease depends on which side of the agreement you’re on and how much risk you’re willing to absorb.
For Landlords
Rental income stays relatively stable because tenants pay operating expenses directly, insulating returns from swings in tax assessments, insurance markets, and maintenance costs. Day-to-day management is minimal under triple net and absolute net structures. Net leases also tend to run longer than gross leases, reducing vacancy and turnover costs. The base rent collected is lower than a gross lease would generate for the same space, though total tenant payments across all categories may be comparable.
For Tenants
You pay less per square foot in base rent than you would under a gross lease, and you can see exactly what you’re spending on taxes, insurance, and maintenance rather than having those amounts hidden inside an all-inclusive figure. Direct payments for property taxes, insurance, and maintenance are generally deductible as business operating expenses.2Office of the Law Revision Counsel. 26 U.S. Code 162 – Trade or Business Expenses
The flip side is exposure. If property taxes jump sharply or a major repair hits, you absorb the cost. There is no averaging into a flat rent payment. Negotiate caps on annual CAM increases and clear definitions of which expenses qualify as pass-throughs to limit that risk. Under triple net and absolute net structures, you may also be responsible for coordinating repairs and vendor relationships, which takes time and expertise beyond running your own business.