Gross Lease vs Net Lease: Who Pays What in a Commercial Lease

In a gross lease the tenant pays a single rent figure and the landlord covers property taxes, insurance, maintenance, and usually utilities. In a net lease the tenant pays a lower base rent plus some or all of those operating expenses directly. The structures allocate risk rather than cost: a gross lease buys the tenant budget certainty and pays the landlord for absorbing expense volatility, so a gross rent is always higher than the net rent on an otherwise identical space.

This is the first distinction anyone reading a commercial lease has to get right, and it is routinely mangled in comparisons. A $38 gross quote and a $27 net quote are not $11 apart. They may be identical, or the net deal may be more expensive. What separates them is a set of expense clauses that neither number tells you anything about.

Last updated July 2026.

What is the difference between a gross lease and a net lease?

The difference is who carries the risk that operating expenses rise. In a gross lease the landlord pays the property expenses out of the rent it collects, so a tax reassessment or an insurance premium spike is the landlord's problem. In a net lease the tenant pays those expenses on top of base rent, so the same reassessment lands on the tenant. Landlords price that risk into gross rent, which is why gross rents run higher. Neither structure is inherently cheaper. What decides the outcome over a ten year term is the expense clause, not the label.

How do the four common structures compare?

Most US commercial leases fall into one of four buckets. The table below shows the standard allocation, though every line is negotiable and the labels are used loosely enough that you should verify each one against the actual lease.

What is a full service gross lease?

A full service gross lease quotes a rent covering taxes, insurance, maintenance, utilities, and janitorial service. It is the standard in institutional office space, and the reason tenants like it is that occupancy cost becomes a single predictable line in the budget. The catch is that full service almost never means fixed for the whole term. Nearly every full service gross lease establishes a base year, and from the second year onward the tenant pays its pro rata share of any increase in operating expenses above that base year. After-hours HVAC is billed separately, at a rate stated in the lease.

Tenants who read full service as one number forever are the ones surprised when the first reconciliation statement arrives in year two.

What is a modified gross lease?

A modified gross lease is a hybrid in which the parties negotiate which operating expenses stay with the landlord and which pass through. It is the most flexible structure and the least standardized, so the label carries almost no information. One modified gross lease means the rent covers everything except electricity and janitorial. Another means the tenant pays its pro rata share of every expense above a fixed dollar stop. A third behaves, in practice, almost like a net lease. Reading the expense clause and its exhibits is the only reliable way to know which one you have signed.

What is a base year and why does it matter?

The base year is the year of operating expenses baked into base rent. In later years the tenant pays its pro rata share of expenses only to the extent they exceed that base amount. If the base year is 2026 and building expenses run $12.00 per square foot, a tenant occupying ten percent of the building pays ten percent of anything above $12.00 in later years.

Two details decide whether that arithmetic is fair. First, whether the base year is a calendar year or a lease year, since a lease commencing in July with a calendar base year gives the tenant only half a year of actual costs in the baseline. Second, whether base year expenses were grossed up to full occupancy. A base year set while a building sat half empty produces an artificially low baseline and inflates every pass-through for the rest of the term. Both traps are worked through in our explainers on the base year and the gross-up provision.

What is an expense stop?

An expense stop is a fixed dollar amount per square foot of operating expenses that the landlord absorbs, with the tenant paying its share of everything above it. It does the same job as a base year, but states the number directly rather than deriving it from a year of actual costs. A stop of $11.50 per square foot means the tenant pays its pro rata share of expenses above $11.50, regardless of what the building actually spent in any particular year. Stops are cleaner to administer and they remove the gross-up argument entirely, which is why many tenants ask for them.

Is a gross lease better for the tenant?

It is better for a tenant that values predictability and does not want to argue about operating expenses every spring. It is not automatically cheaper. The landlord sets gross rent high enough to cover expected expenses plus a margin for the risk that they rise, so over a long term a tenant in a well-run building may pay more under a gross lease than it would have net. Where gross clearly wins is in a building with volatile or opaque expenses, or for a tenant too small to audit a reconciliation. Where net wins is for a tenant confident it can control or scrutinize costs.

Which is better for the landlord or investor?

For an owner-operator who can run a building efficiently, a gross lease captures the upside of that efficiency, because every dollar saved below the rent drops to net operating income. For a passive investor, net leases produce cleaner and more predictable income, which is why net leased assets trade at tighter cap rates than gross leased ones with the same headline rent. The structure you want depends on whether you intend to manage the asset or simply own it.

When you underwrite either one, the number that matters is net operating income after the expense allocation, not the rent. Lenders reach the same conclusion from the other direction, since debt service coverage is computed on NOI, and any credible analysis of the borrower's property income has to start from what the leases actually say about who pays what.

How do you compare a gross quote to a net quote?

Convert both to an effective gross occupancy cost per square foot. Take the net quote's base rent and add the tenant's estimated share of taxes, insurance, and CAM for the coming year, which the landlord should provide as an estimate. Take the gross quote's rent and add the estimated pass-through above the base year, which in year one is zero and in later years is not. Then project both forward across the full term with a realistic expense growth assumption, because that is where the two structures diverge. A gross lease with a badly set base year can cost more over ten years than the net lease you rejected for having a higher all-in first year number.

Do not forget the concessions. Free rent and tenant improvement allowances change the comparison materially, and both belong in a net effective rent calculation rather than a headline rent comparison.

What does an abstract need to capture for each structure?

For a gross or full service gross lease: base rent and escalations, the base year or expense stop, whether it is calendar or fiscal, whether it is grossed up, the pro rata share, the operating expense definition with its inclusions and exclusions, any cap on controllable expenses, the tenant audit right and its deadline, and the services the landlord must provide.

For a net lease: which of taxes, insurance, and CAM the tenant pays, the pro rata share, the landlord roof and structural carve-outs, capital expenditure exclusions, caps, and the reimbursement mechanism. Our NN vs NNN guide covers the net side in detail, and gross lease abstraction covers the expense mechanics on the gross side.

Miss the exclusions list and you cannot challenge a reconciliation. Miss the audit deadline and the right expires quietly. These fields belong in every abstract, which is what our commercial lease abstract template is for.

The practical takeaway

Gross versus net is a question about who absorbs expense risk, and the answer is written in the expense clause rather than on the cover page. Compare deals on projected all-in occupancy cost across the full term, never on headline rent. And when you own more than a handful of leases with different structures, abstract them into one consistent dataset so the base years, stops, shares, and carve-outs sit side by side. That is the only way to see what a portfolio actually costs. Upload a lease to our lease abstraction software and it will pull those fields out with a page citation for each, or read how commercial lease abstraction works end to end.