|OA Professional Publishing Organization||€250 / €1000 / €2500|
|OA Scientist/Scholar Publisher||€75|
All dues are in Euros (EUR) and based on a calendar year. New members joining the organization after August 31st are charged half the yearly membership dues for that calendar year.
Size of OA Professional Publishing Organizations is determined by total annual publishing revenue (Small = below €500,000; Medium = between €500,000 and €5,000,000; Large = above €5,000,000).