Do all Open Access journals charge Article Processing Charges (APC)?

No.

Many OA journals do not charge Articlepublication Processing Chargesfees (APC)APCs). In fact,Indeed, 74% of the journals listed in the Directory of Open Access Journals, DOAJ , do not charge APCs.

PublishingThe publishing process is not free.without cost. Gold OA journals that don'tdo not charge APCs rely on funding from universities, academies, funding agencies,funders, libraries, etc,etc., to function.operate. These are subsidised OA journals and constitute the Platinum OA modelmodel, in which articles are free toboth publishfor the author and freefor tothe read.reader.