Commercial leases are much more complicated than housing rental contracts because the terms are negotiable and flexible. To learn more about the commercial lease and its responsibilities and rights vis-à-vis each party, check out the rest as we explain everything. NOTE: For net leases, the tenant usually pays a “proportionate” share of the expenses they are willing to pay. “Pro-rata” means “in equal shares”, which means that the tenant only pays expenses equal to the area he rents in the property. For example, if a tenant rents a 3,000 m² office in a 10,000 m² building, only 30% (30%) of the building`s property taxes, insurance, etc. are charged. .