OASPA member organisations pay the following dues. All dues are in Euros (EUR) and based on a calendar year.
| Professional Publishing Organisation (Small) | €262.50 |
| Professional Publishing Organisation (Medium) | €1050 |
| Professional Publishing Organisation (Large) | €2625 |
| Professional Publishing Organisation (Very Large) | €5000 |
| Other Organisation (Non-Commercial) | €262.50 |
| Other Organisation (Commercial) | €500 |
| Scholar Publisher | €75 |
Size of Professional Publishing Organisations is determined by total annual publishing revenue (Small = below €500,000; Medium = between €500,000 and €5,000,000; Large = between €5,000,000 and €100,000,000; Very Large = above €100,000,000). More information about all membership categories can be found here.
New members joining OASPA after August 31st are charged half the yearly membership dues for that calendar year.