An operating expense stop is a lease provision that sets a maximum dollar threshold for operating expenses included in the base rent — the landlord bears all operating costs up to the stop amount, and the tenant is responsible for any expenses above that threshold. The stop is expressed as a dollar amount per square foot per year (e.g., "$12.00 per RSF"), and operates as the demarcation point between gross and modified gross lease structures.
By Angel Campa, Founder · Updated March 2026
Operating expense stops fundamentally determine the actual occupancy cost of a gross or modified gross lease. A tenant who negotiates a stop at $15 per RSF in a building where actual operating expenses are $14 per RSF is effectively paying a gross lease — the landlord bears all expenses. But if expenses grow to $18 per RSF, the tenant pays $3 per RSF in additional costs beyond base rent. Over a 10-year lease with 5% annual expense growth, misunderstanding the stop can result in tens of thousands of dollars in unexpected occupancy costs.
Negotiate the stop at or slightly above the first-year actual operating expenses, ensuring an effective full-gross lease for at least the first year. Cap the tenant's annual expense obligation growth rate (e.g., no more than 3%–5% above the stop per year) to limit upside exposure. Include an exclusion for capital expenditures from the operating expense calculation, as tenants should not bear capital costs through an operating expense stop structure. Require annual expense reconciliation statements with full supporting documentation to verify that expenses above the stop are properly categorized. Property managers automating CAM reconciliation can use <a href="https://www.capveri.com" target="_blank" rel="noopener noreferrer">CapVeri.com</a> to track expense stops across their entire portfolio, automatically flagging tenants when actual operating expenses exceed their stop threshold and generating accurate reconciliation statements.
Fixed dollar stop (most common in office leases), base-year stop (operating expenses in a defined base year serve as the stop), and gross lease structures where the landlord bears all operating expenses without a stop mechanism.
Lextract extracts these fields directly from your lease PDF when this clause is present:
Base Year Clause
A base year clause establishes a reference year — typically the first full calendar year of the lease term — against which future operating expense increases are measured.
Gross-Up Provision
A gross-up provision requires the landlord to adjust the operating expense reconciliation to reflect what expenses would have been if the building were 95%–100% occupied, rather than the actual occupancy level during the measurement year.
Rent Escalation Clause
A rent escalation clause is a lease provision that provides a predetermined mechanism for increasing the base rent over the lease term.
An operating expense stop sets a maximum dollar threshold per RSF per year for operating expenses included in the base rent. The landlord bears all costs up to the stop amount, and the tenant pays any excess. For example, with a $12 per RSF stop on a 5,000 RSF space, the tenant pays nothing additional if expenses are $12 or less, but owes $5,000 annually if expenses reach $13 per RSF ($1 overage x 5,000 RSF). The stop demarcates gross versus modified gross lease structures.
Negotiate the stop at or slightly above the first-year actual operating expenses, ensuring an effectively gross lease for at least year one. Cap the tenant's annual expense growth above the stop at 3% to 5% per year to limit upside exposure in inflationary periods. Exclude capital expenditures from the operating expense calculation — tenants should not bear capital costs through an expense stop structure. Require annual reconciliation statements with full supporting documentation to verify that overages are properly categorized.
If operating expenses start at $14 per RSF (equal to the stop) and grow at 4% annually, the tenant pays no overage in year 1, $0.56 per RSF in year 2, $1.14 per RSF in year 3, and so on — reaching $6.17 per RSF by year 10. On a 10,000 RSF space, cumulative overage payments total approximately $244,000 over 10 years. With a 3% annual cap on overage growth negotiated by the tenant, cumulative payments would be approximately $180,000 — a savings of $64,000.
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