Definition
An Expense Stop is a commercial lease provision that establishes a baseline amount of operating expenses that the landlord is responsible for. If actual operating expenses exceed that baseline, the tenant must reimburse the landlord for their proportionate share of the increase.
In simple terms: the landlord pays expenses up to a set level; anything above that level is passed through to the tenant.
How Expense Stops Work
The lease sets a base year or fixed dollar amount as the expense stop. Tenants reimburse the landlord for increases above that base.
Example
- Base year operating expenses: $10.00 per SF
- Current year expenses: $12.00 per SF
- Tenant space: 5,000 SF
Increase above stop = $2.00 per SF
Tenant reimbursement = 5,000 SF × $2.00 = $10,000
Expense Stop vs. Base Year
- Base Year Stop: Based on actual expenses in the first lease year.
- Fixed Stop: Set at a negotiated dollar amount per square foot.
Base year stops are common in office leases, especially full-service gross leases.
Common in Office Leases
Expense stops are typically found in:
- Full Service Gross (FSG) Leases
- Modified gross leases
They are less common in Triple Net (NNN) leases, where tenants usually pay all operating expenses directly.
What Counts as Operating Expenses?
- Property taxes
- Insurance
- Common area maintenance (CAM)
- Utilities for common areas
- Management fees
- Janitorial services
Lease language defines inclusions and exclusions.
Gross-Up Provisions
Many leases include a gross-up clause, adjusting base year expenses to reflect stabilized occupancy. This prevents artificially low base year expenses in partially leased buildings.
Why Expense Stops Matter to Investors
- Inflation hedge: Protects landlord from rising costs.
- NOI stability: Shifts variable expenses to tenants.
- Valuation impact: Predictable reimbursements improve underwriting.
- Risk allocation: Shares cost risk with tenants.
Risks & Pitfalls
- Incorrect base year calculations.
- Failure to apply gross-up properly.
- Disputes over excluded expenses.
- Underwriting unrealistic expense growth assumptions.
Investor Checklist
- Review base year expense documentation.
- Confirm gross-up provisions in leases.
- Model future expense growth carefully.
- Verify reconciliation and audit rights.
- Evaluate tenant credit quality for reimbursement reliability.
Expense Stop vs. Triple Net (NNN)
- Expense Stop: Landlord covers expenses up to a threshold.
- NNN Lease: Tenant pays nearly all property expenses.
Expense stop leases create partial expense protection, whereas NNN leases fully shift expense risk to tenants.