The company will employ over 300 people at the centre within the next few years, the government said in a press release.
Workers at the centre will mainly be engaged in activities in the field of human resources, project management, IT, risk management, property management, etc.
KBC picked Varna after looking into several other cities in Central and Eastern Europe, the government noted.
KBC is the owner of Bulgaria's third-largest lender by assets - United Bulgarian Bank (UBB).