Purpose What is the current level of integration of the retail and wholesale banking sectors in the European Union (EU) countries, and what are the main factors and challenges affecting it? What are the solutions to promote the integration and convergence of the retail banking sector in the European countries?. Design/methodology/approach Evaluated the level of integration of the banking sector, focusing on the EU banking context, retail banking especially. The paper will adopt a comprehensive and multidimensional approach, considering different criteria and indicators of integration, such as price, quantity and information, as well as different segments and dimensions of the EU banking sector, such as wholesale and retail, assets and liabilities, products, services, price indicators and institutions and markets. Findings It reveals that while significant integration has been realized in domains like the money market and wholesale banking, it is less pronounced in the retail banking and capital markets. Originality/value This paper is an original research. The entire study belongs to me.