Cumulative CAM Cap
A compounding annual cap on controllable CAM expenses that allows unused cap room to carry forward to future years, giving landlords more flexibility than non-cumulative caps.
Model Lease Language Variations
“Controllable Operating Expenses shall not increase by more than five percent (5%) per annum on a cumulative, compounding basis over the Base Year amount. Any unused portion of the permitted increase shall carry forward to subsequent years.”
Compounding 5% cap with explicit carry-forward. By year 5, the cap ceiling is 27.6% above base year — significantly higher than non-cumulative equivalent.
“Tenant's share of Controllable Expenses shall not exceed the Base Year amount increased by five percent (5%) per annum, calculated on a cumulative compounding basis. For purposes hereof, 'Controllable Expenses' excludes taxes, insurance, utilities, and snow removal.”
Cumulative compounding with clear exclusion list. Standard market provision balancing landlord recovery with tenant predictability.
“Controllable Expenses shall not increase by more than four percent (4%) per annum on a cumulative but non-compounding basis over the Base Year amount. The cap shall apply to Tenant's proportionate share, not the gross expense.”
Cumulative but non-compounding (simple interest). Applied to tenant's share rather than gross — prevents landlord from allocating cap room across tenants.
Calculation Methodology
1. Establish base year controllable expense amount. 2. For compounding: multiply base by (1 + cap rate)^n where n = lease year. 3. For non-compounding: multiply base by (1 + cap rate × n). 4. Compare actual controllable expenses to the cap ceiling. 5. Pass through the lesser of actual or cap ceiling. 6. Track cumulative cap room carried forward annually.
Common Drafting Errors
Failing to specify whether the cap is compounding or simple — a 5% compounding cap allows 27.6% increase by year 5 vs. 25% simple
Not defining 'controllable expenses' — leaves open whether insurance, taxes, or utilities are capped
Applying the cap to gross expenses instead of tenant's proportionate share — creates allocation problems in multi-tenant buildings
Omitting whether the cap resets on lease renewal or continues from the original base year
Relevant Case Law
Dispute over whether cumulative cap applied to gross expenses or tenant's share. Court held ambiguous lease language was construed against landlord drafter, limiting recovery by $182K over lease term.
Billing System Implications (Yardi / MRI)
In Yardi, cumulative caps require custom recovery pool configuration with year-over-year tracking. Common error: configuring a non-cumulative cap when the lease says cumulative, losing carry-forward amounts. In MRI, use the Cap Accumulator feature in Recovery Analysis — verify compounding vs. simple calculation method matches lease terms.
CapVeri Analysis
Cumulative caps are more landlord-friendly than non-cumulative caps because unused cap room carries forward. However, the compounding vs. non-compounding distinction is frequently misconfigured in billing systems, creating multi-year errors that compound over the lease term.
Related Resources
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