An expense stop is the fixed level of operating expenses, usually stated per square foot, that a landlord agrees to pay under a lease. The tenant reimburses any expenses above that level. The expense stop caps the owner's exposure to rising costs and shifts the overage to the occupant.
How an Expense Stop Works
An expense stop works by dividing a building's operating expenses at a contractual threshold. The landlord pays everything up to the stop, and the tenant pays its pro rata share of everything above it. PropertyMetrics states the tenant reimburses the difference between actual expenses and the stop, multiplied by rentable area.
The formula is direct:
Tenant reimbursement = (Actual OpEx per SF - Expense Stop per SF) x Tenant rentable SF
If a lease sets the expense stop at $10 per square foot and actual operating expenses reach $11 per square foot, the tenant owes $1 per square foot. On 5,000 rentable square feet, that is $5,000 for the year. When actual expenses fall below the stop, the tenant owes nothing, and the landlord keeps the savings.
Why an Expense Stop Matters
An expense stop matters because it fixes the operating-cost risk each party carries for the full lease term. The landlord locks in a predictable ceiling on its share, while the tenant absorbs inflation, tax reassessments, and utility spikes above the stop. Coy Davidson, a tenant advisor, notes that a poorly set stop can raise a tenant's occupancy cost materially year over year.
For an operator underwriting a deal, the stop level drives net effective rent. A stop set below current expenses recovers cost from day one, effectively raising rent. A stop set at or above current expenses gives the tenant a cushion and lowers early recovery. "The expense stop decides who pays for inflation, and where the line sits is worth more than the headline rent." Getting the number wrong on either side leaves money on the table for years.
Example
The table compares two ways to set the stop on 5,000 rentable square feet where actual operating expenses run $11.00 per square foot. The base-year stop equals first-year actuals; the fixed-dollar stop is negotiated at $9.50.
Item | Base-Year Stop | Fixed-Dollar Stop |
|---|---|---|
Expense stop per SF | $10.00 | $9.50 |
Actual OpEx per SF | $11.00 | $11.00 |
Overage per SF | $1.00 | $1.50 |
Rentable SF | 5,000 | 5,000 |
Tenant reimbursement | $5,000 | $7,500 |
The $0.50 lower stop recovers an extra $2,500 per year from this tenant. Across a 5-year term, that is $12,500 before any expense growth.
Variations and Edge Cases
Expense stops vary in how the threshold is defined and which costs count against it. The two dominant forms are the base-year stop and the fixed dollar stop.
Variation | Behavior |
|---|---|
Base-year stop | Stop equals actual operating expenses in year one; tenant pays increases after that |
Fixed dollar stop | Stop set as a negotiated $/SF figure, independent of any base year |
Gross-up | Expenses are grossed up to full occupancy so the stop is not understated in a partly empty building |
Expense exclusions | Capital items, leasing commissions, and debt service are commonly carved out of countable OpEx |
Caps on controllable expenses | Tenant negotiates an annual ceiling on the growth of expenses it can be billed for |
A base year set during a low-occupancy period can understate the stop, so a gross-up provision is standard protection for the tenant.
Expense Stop vs Base Year
An expense stop is often confused with a base year. An expense stop is any fixed operating-expense level, stated in dollars per square foot, above which the tenant reimburses the excess. A base year is one method of setting that level: the stop equals the building's actual operating expenses in the first lease year. First National Realty Partners describes the base year as a type of expense stop, not a separate concept.
Every base year is an expense stop, but not every expense stop is a base year. A fixed dollar stop of $9.50 per square foot is an expense stop with no reference to any year's actuals. The practical difference is negotiability: a base year is set by the building's real costs, while a fixed stop is a number both sides argue over at signing.
Frequently Asked Questions
Is a lower expense stop better for the landlord or the tenant?
A lower expense stop favors the landlord. The lower the stop, the sooner and the more the tenant reimburses, because reimbursement equals actual expenses minus the stop. A higher stop favors the tenant by giving a larger cushion before any pass-through begins.
Does the tenant pay the full overage or only a share?
In a multi-tenant building the tenant pays its pro rata share of the overage, based on its rentable square footage as a percentage of the building. A stop is typically stated per square foot precisely so it scales to each tenant's leased area.
What expenses count against the expense stop?
Operating expenses such as property taxes, insurance, utilities, and common area maintenance count. Capital expenditures, leasing commissions, tenant improvements, and debt service are commonly excluded by negotiation, which is why the lease definition of operating expenses matters as much as the stop itself.