A gross lease is a commercial lease in which the tenant pays a single flat rent and the landlord covers the property operating expenses, meaning taxes, insurance, and maintenance. The operating costs are imputed into the quoted rent rather than billed separately. It gives the tenant a predictable payment and is often called a full-service lease.
How Does a Gross Lease Work?
A gross lease works by bundling operating expenses into one rent figure that the landlord absorbs. The tenant pays a fixed amount each period and the landlord pays property taxes, insurance, and maintenance out of that rent. Because the landlord carries expense risk, the quoted gross rent is higher than a comparable net rent, with the operating costs priced in.
Per Wikipedia and SquareFoot, a full-service gross lease bills the tenant only base rent while the landlord pays all outgoings, which are imputed into the price of the lease. This structure is common in multi-tenant office buildings, where splitting expenses tenant by tenant would be impractical.
Feature | Gross lease treatment |
Rent structure | Single flat payment |
Property taxes | Paid by landlord |
Insurance | Paid by landlord |
Maintenance | Paid by landlord |
Tenant cost predictability | High; one fixed figure |
Because the landlord bears operating cost, a true gross lease exposes the landlord to expense inflation over the term. Most modern "gross" leases are therefore modified gross, using a base year or expense stop so the tenant absorbs cost growth above a set floor.
Why Gross Lease Matters
A gross lease matters because it assigns operating-expense risk to the landlord, which simplifies the tenant's budgeting but raises the quoted rent. The tenant knows its full occupancy cost in advance, while the landlord must forecast taxes, insurance, and maintenance and price them into the rent. Misjudging that forecast erodes the landlord's return over a multi-year term.
Per National Lease Advisors, a pure gross lease is less common today than the modified gross form, because landlords prefer to shift expense growth back to the tenant through a base year or expense stop. Under a modified gross lease, the landlord pays expenses up to the base year amount and the tenant pays its share of increases above it.
The quotable point for an operator: a gross lease trades a higher, predictable rent for the landlord's promise to absorb operating costs, so the tenant pays for certainty and the landlord prices in the risk.
Example
A tenant occupies 10% of an office building on a modified gross lease with a 2025 base year. Building operating expenses were $500,000 in 2025, the base year amount. In 2026 they rise to $540,000, an increase of $40,000. The tenant owes 10% of that increase on top of the flat gross rent, while the landlord absorbs everything up to the base year.
Step | Calculation | Result |
Base year expenses (2025) | Given | $500,000 |
Current-year expenses (2026) | Given | $540,000 |
Expense increase | $540,000 - $500,000 | $40,000 |
Tenant proportionate share | Given | 10% |
Tenant pass-through | 10% x $40,000 | $4,000 |
Under a true full-service gross lease the tenant would owe nothing beyond the flat rent, and the landlord would absorb the full $40,000 increase. The base year mechanic, per PropertyMetrics, is what separates a modified gross lease from a pure gross lease and pushes expense growth back to the tenant.
Variations and Edge Cases
A gross lease is not a single standard, and how much the tenant truly absorbs depends on whether it is full-service or modified with a base year or expense stop. The same building can be quoted as full-service gross or modified gross with materially different tenant exposure. The table below covers the variants an operator should confirm.
Variant | Treatment |
Full-service gross | Landlord pays all operating expenses; tenant pays flat rent only |
Modified gross | Landlord pays expenses to a base year; tenant pays its share of increases |
Expense stop | Landlord's obligation capped at a fixed dollar per square foot, set at signing |
Industrial gross | Landlord pays some expenses; tenant covers others such as its own utilities |
Gross-up provision | Restates expenses as if the building were full, protecting the tenant from lease-up spikes |
The most common mistake is assuming "gross" means the tenant never pays operating costs. A modified gross lease with a low base year set during vacancy can pass substantial expense growth to the tenant. Always confirm whether the lease is full-service or modified and check the base year.
Gross Lease vs Net Lease
A gross lease is often confused with a net lease, and both quote a base rent, but they assign operating expenses in opposite directions. Under a gross lease the tenant pays one flat rent and the landlord absorbs taxes, insurance, and maintenance. Under a net lease the tenant pays base rent plus some or all of those expenses.
Per National Lease Advisors, the distinction is which party carries operating-cost risk. A gross lease bundles expenses into a higher, predictable rent and leaves the risk with the landlord. A net lease strips expenses out, quotes a lower base rent, and passes the cost to the tenant. A tenant wanting certainty prefers gross; a landlord wanting an insulated yield prefers net.
Frequently Asked Questions
What is a gross lease in commercial real estate?A gross lease is a commercial lease in which the tenant pays a single flat rent and the landlord covers property operating expenses, meaning taxes, insurance, and maintenance. The costs are imputed into the quoted rent, giving the tenant a predictable payment and often called a full-service lease.
What is the difference between a full-service and a modified gross lease?A full-service gross lease has the landlord pay all operating expenses while the tenant pays only flat rent. A modified gross lease uses a base year or expense stop, so the landlord pays expenses up to a set floor and the tenant pays its share of any increases above it.
Does the tenant ever pay operating expenses under a gross lease?Under a true full-service gross lease the tenant pays only the flat rent. Under a modified gross lease the tenant pays its proportionate share of operating-expense increases above the base year amount, so "gross" does not always mean the tenant is fully shielded from cost growth.
Related Terms
Net Lease
Triple Net Lease
Base Year
Operating Expenses
Modified Gross Lease