PwC, EY jointly command an estimated 35.9% of Nigeria’s corporate audit market in 2025`

PricewaterhouseCoopers (PwC) and Ernst & Young (EY) have emerged as the leading auditors among 128 major Nigerian companies reviewed in 2025, with each firm auditing 23 companies, representing 17.97% of the total.

The analysis of the 2025 auditor disclosures of selected 128 listed and unlisted companies shows that the Nigerian audit market remains concentrated around a handful of established professional services firms, although several other local and international audit practices continue to compete for corporate engagements across different sectors.

PwC and EY jointly occupy the top spot, with 23 companies each, followed by Deloitte & Touche, which audited 17 companies, and KPMG Professional Services, with 13 companies.

Together, the four firms audited 76 of the 128 companies reviewed, accounting for 59.38% of the total sample, while the top 5 companies with PKF Professional Services inclusive audited 86 companies, accounting for 67.19% of the 128 companies reviewed.

PricewaterhouseCoopers (PwC) and Ernst & Young (EY) each audited 23 companies, giving both firms a 17.97% share of the 128-company dataset.

In practical terms, each firm audited approximately one in every six companies covered in the review. The narrow gap at the top highlights the intense competition among Nigeria’s largest audit firms for corporate mandates.

PwC’s 23-company portfolio cuts across several important segments of the Nigerian economy, including banking and financial services, consumer goods, industrial goods, energy, agriculture, telecommunications infrastructure and other sectors. This is the same number of companies audited by the firm in the previous year.

PwC’s portfolio includes leading names such as BUA Cement, BUA Foods, Cadbury Nigeria, Dangote Sugar Refinery, Guinness Nigeria, Julius Berger, Providus Bank, Stanbic IBTC Holdings, Presco Plc and Seplat Energy, reflecting a strong presence across industrial goods, consumer goods, agriculture, financial services and oil and gas.

Similarly, EY maintained a diversified client base that spans Access Holdings, AIICO Insurance, Coronation Insurance, Guaranty Trust Holding Company, Nestlé Nigeria, MTN Nigeria, NGX Group, Sterling Financial Holdings and Honeywell Flour Mills, reinforcing its position as one of the most influential audit firms in Nigeria’s capital market.

Although EY audited 22 companies in 2024, down from the 23 companies audited in 2025. Together, PwC and EY audited 46 companies, accounting for 35.94% of all companies reviewed, meaning more than one in every three companies in the dataset audited either of the two firms.