The increase in payment periods poses a major risk to European recovery. What determines payment periods in the different sectors? Automobiles and automotive components: the problem for subcontractors. Air transport: an instrument of globalisation but marked by regional differences. Chemicals: supplying industries and supporting the industrial fabric via client credit. Pharmaceuticals: no cash flow problems. Aeronautic components: stability in payment periods � sign of a healthy sector. Construction: the sector with the greatest disparities.