What is another word for additional fee?
Pronunciation: [ɐdˈɪʃənə͡l fˈiː] (IPA) 
There are various synonyms for the term "additional fee," including extra charge, surcharge, supplementary cost, ancillary expense, and added fee. An extra charge refers to any fee paid besides the basic or regular charge. A surcharge is an extra charge added on top of the original fee, usually to cover an additional service or product. Supplementary cost refers to any additional expense incurred as a result of the initial charge. Ancillary expense means an expense that is not part of the main fee but is incurred in addition to it. Lastly, an added fee means any additional cost beyond what was initially agreed upon.
