Methods are comparable to those of other European countries using administrative tax data. They are compliant with the european regulation (EBS).

Consistency over time is ensured through the use of stable methods. In the case of methodological changes, or change of base period, past indices are backcast to ensure comparability over time.

A benchmarking with other STS data, structural data or national accounts can be carried out. In addition, national accountants use turnover indices for quarterly estimates or provisional annual estimates and provide feedback on consistency with past account data.

Internal consistency is ensured through the aggregation method.