A potential EU enlargement to nine new member states could significantly alter the bloc's budget, particularly affecting cohesion funds for less-developed regions. Current regions in southern Spain, Italy, Portugal, Greece, and eastern Europe may be reclassified, leading to funding cuts for Italy and Spain, while Poland's funding remains stable. The overall EU budget could increase from €1,211 billion to €1,356 billion, with expected economic benefits for existing members, including increased exports and foreign direct investments.