RDI’s annual membership fees are set according to each organization’s annual income. Fees are payable in the first trimester of each year. RDI’s current fee scale is as follows:
| Member Annual Income in € | Membership Fees |
| Less than 50 000 | 0 € |
| Between 50 000 and 199 999 | 100 € |
| Between 200 000 and 499 999 | 250 € |
| Between 500 000 and 999 999 | 350 € |
| More than 1 000 000 | 750 € |