GfK's consumer climate survey asks around 2,000 German consumers every month about their assessment of economic conditions. The questions focus on economic and income expectations and consumers' willingness to buy. Having calculated the differences between the positive and negative responses for each question the results are synthesized into a single number that reflects overall consumer expectations for the coming month.

Any insight into household expenditure is vital to understanding how the economy as a whole is shaping up. The monthly correlation between the GfK consumer gauge and actual spending is not especially high but trends in the index can offer useful information about potential underlying developments in consumer behavior. As a forward looking indicator, the GfK index is one input used by analysts in the construction of their forecasts of future German retail sales.