| Costs | |
| Pre-audit fees | - |
| Audit fees* | € 125/hour |
| Surveillance fees (every 3 year) | Only travelling costs and living allowance fees in case of an onsite audit. |
|
Annual fees** |
€ 500 |
* The audit fees for interworking and functionality tests are usually limited to one day. The audit fees for lower layer tests could take up to 2 days.
** The annual surveillance fees are always invoiced in December.