Most of them do, and even those that don't generally are pricing their services higher to reflect estimated CAM expenses anyways, since they are essential overhead costs and must be accounted for. CAM charges are very common in NNN (triple net) leases, where the lessees take responsibility for the three net expenses (or category of expenses) on top of the lease fee. These three pillars are: Property taxes Insurance CAM expenses A triple net lease usually allocates these expenses according to a basic pro rata calculation (as explained in the next section). On one hand, it could be to the advantage of the property owner, who has outsourced the cost of all expenses – but on the other, it gives the tenants a huge incentive to control more of the services in order to cut costs. Triple net leases are a type of absolute net lease, where all expenses are paid by the tenant, as opposed to a gross lease where the expenses are borne by the landlord. Most leases are somewhere in the middle, and there are also double- and single-net leases in which the tenants are responsible for two or one of the three pillars, respectively. No matter what method is used, ensuring the expenses accurately reflect (A) services actually received and (B) the lease terms is important. The tenant must know they are not overcharged, and the owner must ensure they remain competitive and maintain a good reputation in their business community by charging CAM expenses fairly.