Resources · Glossary
What is a CAM gross-up?
A CAM gross-up is an adjustment that restates variable operating expenses as if a building were at a stated occupancy, often 95% or 100%, so tenants in a partly vacant building pay a fair share. It applies only to costs that rise and fall with occupancy.
| Term | Area |
|---|---|
| CAM gross-up | Commercial leases |
| CAM reconciliation | Modules |
| Base year | Glossary |
How does a gross-up work?
Operating costs split into fixed costs, such as insurance and property tax, and variable costs, such as janitorial services and some utilities. When a building is partly empty, variable costs are lower than they would be at full occupancy. A gross-up scales the variable costs up to what they would have been at the occupancy named in the lease.
The grossed-up pool is then shared across tenants in the normal way. Gross-ups matter most in base-year leases, where an artificially low base year would otherwise make later years look like large increases.
See also: CAM reconciliation.

What does a gross-up calculation look like?
Example (illustrative figures). A building is 70% occupied. Variable expenses for the year are $210,000. Grossed up to 95% occupancy: $210,000 ÷ 0.70 × 0.95 = $285,000. Fixed costs are not adjusted.
A tenant with a 10% share would be allocated 10% of the grossed-up variable pool plus 10% of fixed costs, under its lease terms.

Is a gross-up fair to tenants?
A gross-up is designed to be neutral. Without it, tenants in a partly empty building could pay sharp increases as the building fills, simply because variable costs rise with occupancy. Applied consistently to both the base year and later years, it removes that distortion. It should not let the landlord recover more than 100% of the costs actually incurred.
Which expenses can be grossed up?
Only expenses that vary with occupancy should be grossed up, such as janitorial services, trash removal and some utilities. Fixed costs like insurance, property tax and most security contracts stay the same whatever the occupancy, so they are not adjusted. Leases usually say which categories may be grossed up.
What occupancy level is used?
The lease states the occupancy level, commonly 95% or 100%. Some leases gross up only when actual occupancy falls below that level. The chosen level should match the assumptions used for the base year, so that each year is compared on the same basis.
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