Competition in the retail banking market has intensified in recent years, and private customers have become more willing to switch providers. This work addresses customer loyalty as a potential response for cooperative banks to this situation. Customer loyalty generates various effects on business success through increased cross-buying, referrals, and higher enforceable prices. However, to leverage this phenomenon in business practice, the determinants and means of influencing them must be known. After analyzing the existing literature, the work develops a determinants model of customer loyalty, which is divided into four areas: attachment, commitment, customer characteristics, and competition. Attachment includes trust, familiarity, and image as psychological switching barriers and social switching barriers.