There is no fee to make a FOIA request. However, TSA may charge a fee for search, duplication, or review of records depending on the category of the requester.  

Search fees will be charged for all requests except those made by academic institutions, noncommercial scientific institutions, or members of the press.

Review fees will be charged for all commercial use requests. You will be advised if the fees total more than $25. You may also seek a fee waiver in accordance with the DHS FOIA regulations.