The shares of the national central banks (NCBs) in the ECB's capital key reflect the shares of the Member States in the total population and gross domestic product of the EU, in equal weightings.
Eurosystem NCBs are required to pay up their subscribed capital in full. The non-euro area NCBs only have to pay up a minimal percentage of their subscribed capital as a contribution to the operational costs of the ECB.
For details, see www.ecb.europa.eu/ecb/orga/capital
OR.006 01/12European Central Bank