Is designed to measure inflation in a harmonised manner across Member States.

Harmonized Indices of Consumer Prices (HICP) are computed according to uniform methodology of European Union by member states. The basis of calculation of HICP for Poland is: - an observation of representatives of consumer goods and services; - the weight system based on the structure of individual consumption expenditure in the households sector from national account two years ago. The grouping of consumer goods and services has been based on the European Classification of Individual Consumption by Purpose (ECOICOP, until 2013 — COICOP/ /HICP). Harmonized price index is calculated by the Laspeyres formula. In accordance with inflation criterion included in the Maastricht Treaty, HICP is a base for the stabilization price assessment. In Poland this index has been computed since 1997. In accordance with the EU regulations, the retrospective data in the scope of HICP may undergo a change as a result of verification connected with the methodology modification.

• regulation (EU) 2016/792 of the European Parliament and of the Council of 11 May 2016 on harmonised indices of consumer prices and the house price index, and repealing Council Regulation (EC) No 2494/95
  Place of publication: (Dz. Urz. UE L 135 z 24.05.2016, str. 11)