XBRL/iXBRL tagging: In-house solution vs. service provider
The implementation of the ESEF Regulation involves considerable effort. The amount of effort required on your part is particularly dependent on whether you implement XBRL/iXBRL tagging etc. yourself or commission a service provider to do so.
If you decide on an in-house solution for XBRL tagging, the initial costs are significantly higher. You will first have to invest in a corresponding software, in the associated system adaptations and probably in the expansion of your personnel resources in accounting/investor relations. Once everything has been implemented, the requirements can be implemented semi-automatically, thus significantly reducing manual effort and sources of error. It is important, however, that you make this decision on a group level, if necessary.
The ESEF taxonomy is based on the IFRS taxonomy of the IFRS Foundation. Experience with the IFRS taxonomy shows that frequent changes and additions are to be expected. You must ensure that the taxonomy and technical standards are always up to date and that innovations at all levels are incorporated into your accounting system. This effort is probably not manageable without additional manpower.
By hiring an ESEF service provider, you can outsource this risk. In addition, the initial investment and additional costs for accounting, IT and investor relations are lower. The costs are calculated per report. You also retain full control over conversion and tagging.