Nigeria’s top audit firms reported over N175 billion in combined revenue for the 2025 financial year, according to Financial Reporting Council of Nigeria transparency reports. KPMG Nigeria led the revenue rankings with N67 billion, despite having fewer clients than PricewaterhouseCoopers (PwC). PwC, which topped the market by client count with 295 entities, recorded N55.36 billion in revenue, followed by Ernst & Young (EY) at N42.27 billion. The data highlights a significant shift in the professional services sector, where advisory, tax, and consulting services increasingly drive revenue growth over traditional statutory audit engagements. Deloitte, BDO, Grant Thornton, and Forvis Mazars also maintained substantial market influence, though Deloitte did not disclose specific revenue figures.