The phrase "bag fee" refers to a charge or extra payment that is required when you want to use or obtain a bag, usually at a store or a specific location. Full definition
Supporters of the plastic bag fee say it's designed to cut down on environmentally harmful waste and surcharges in other cities have worked better than outright bans. (nystateofpolitics.com)
I didn't like that I paid almost $ 100 on bag fees for one basically empty check bag. (kayak.sg)
First and second bag fee waivers for you and one companion. (thepointsguy.com)