Retail Trade Index is the index of deflated sales/turnover measures the monthly (and/ or quarterly) changes in the sales/turnover of retail trade units. It is calculated either as sales/turnover at current prices deflated by an appropriate deflator, or as a quantity index derived directly from the quantity of goods sold. The scope of retail trade index includes the activities listed in Division 47, section G, of ISIC Rev.4 (Retail trade, except of motor vehicles and motorcycles). The index data are presented in a seasonally adjusted form, where available.

Sales/Turnover comprises the totals invoiced by the establishment during the reference period and corresponds to market sales of goods or services supplied to other enterprises or transferred to other establishments of the same enterprise. It includes all other charges (transport, packaging, etc.) passed on to the customer, even if these charges are listed separately in the invoice. Value Added Tax and other similar deductible taxes directly linked to sales/turnover as well as all duties and taxes on the goods or services invoiced by the unit are usually excluded.