A CAM cap is a limit on how much a landlord can increase a tenant's share of controllable common area maintenance expenses from one year to the next. Because CAM charges can add 30 to 60% to base rent, the cap is one of the most financially significant terms in a commercial lease — and one of the most commonly misread, because its mechanics are subtle.
What the Cap Limits
A standard CAM cap limits controllable expense increases to typically 3% to 5% annually. The key word is controllable: caps usually apply to expenses within the landlord's management, while uncontrollable costs — utilities, insurance, and real estate taxes — are often carved out and can rise without limit. A reviewer has to confirm exactly which expenses the cap covers, because a "5% cap" that excludes the fastest-rising costs offers far less protection than it appears to.
Where It Lives in the Lease
The CAM cap is in the operating expense or additional rent section, but its full meaning often requires cross-referencing the CAM definition (what's included), the exclusions list, and any amendment that modified the cap. The cap percentage alone is not the whole story — the application method matters as much as the number.
The Detail That Decides the Dollars
The single most important sub-term is whether the cap is cumulative or non-cumulative, which determines whether unused capacity from low years can be banked and applied later. The AI agent extracts the cap percentage, what it applies to, the exclusions, and the cumulative/non-cumulative structure together — the full picture. It's demonstrated at omnionlinestrategies.com/ai-agent-cre-lease-abstraction.