Shopping centers and malls can institute a type of charge added to a base rent price. This charge is calculated -in most cases - based on the tenant's monthly revenue. In most cases the turnover charges will be calculated as a percentage of the store revenue.
For example, a store's monthly base rent is 8,000 dollars, but in addition there is a stipulation that the store needs to pay 10% of its revenue. If it sells $100,000 one month, it needs to pay $10,000 (and if it sells $70,000 it needs to pay the base $8,000).
What is the proper term for this stipulation, in American English?
Example sentence:
The rent is $8,000, but together with this month's _________, $10,000.