(15)National competent authorities incur costs when carrying out work pursuant to Regulation (EU) No 648/2012 and, in particular as a result of any delegation of tasks in accordance with Article 74 of Regulation (EU) No 648/2012. The fees charged by ESMA to trade repositories should also cover those costs. In order to avoid competent authorities incurring a loss or profit from carrying out delegated tasks or from assisting ESMA, ESMA should reimburse only the actual costs incurred by that national competent authority.