Methodology tends to be largely harmonized (a methodological guide has been prepared jointly by Eurostat and the OECD, and will be updated soon). The services producer price indices measure the evolution of transaction prices, excluding taxes, benefits from the activities of services, depending on their "market" (French businesses, households in France, the rest of the world).

Thus, they are evaluated according to the concept of basic prices.

The aggregated indices (French classification of products - CPF4 and upper levels) are chained Laspeyres indices, taking 2010 as a the basis.

The weights used to aggregate the quarterly price evolutions are updated in June in order to calculate the final first quarter, from the sources of national accounts and the latest possible structural statistics, generally covering the year n-2 (n -1 in the ideal and in practice for the years 2006 to 2011 calculated backcasting). Indices branches and levels below, although calculated using the same formulas are Laspeyres fixed base, because the weights are usually updated every five years during the renewal sample (20% of branches are renewed annually: companies, suppliers, control series, weights).