Stress tests have indicated Spanish banks require €59.3bn in fresh capital.
Seven of the 14 banks stress-tested require capital, seven do not.
The two biggest banks in Spain, Santander and BBVA do not require extra capital.
The stress tests are a precondition for a potential €100bn rescue package for the stricken Spanish banking sector, which was agreed by eurozone partners in June.
The tests are part of the government's continuing efforts to convince investors that it has got to grips with problems in the Spanish economy.
They are also a precursor to Spain setting up a NAMA-style bad bank.