A lease clause that allows the landlord to increase recoverable expenses which vary with occupancy to an amount that would be incurred if a defined level of occupancy was achieved. Gross-up clauses typically allow the landlord to gross-up variable operating expenses to 95% or 100% occupancy. EXAMPLE: ABC Tenant's lease allows the Landlord to gross-up variable operating expenses to 100% occupancy for expense recovery purposes. During the year, the average actual occupancy of Ellipsis Tower is 90%. The Landlord identifies Cleaning Expense as the only variable operating expense, and the actual cost for such year is $90,000. Due to the gross-up clause, the Landlord may include $100,000 in recoverable expenses for cleaning, reflecting a gross-up of the $90,000 actual cleaning expense to $100,000 ($90,000 divided by 90%).