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Big 4 Audit Oligopoly Essay

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Bo Kim Professor Gurtovoy Economics 315 Spring 2015 The “Big 4” Audit Oligopoly I. Introduction In the world of public accounting, there are four firms that dominate the audit services market. The “big four” accounting firms are made up of Deloitte & Touche, Ernst & Young (EY), KPMG, and PricewaterhouseCoopers (PwC) that provide tax, audit/assurance, and advisory services to the majority of FORTUNE 1000 companies, government entities, and high net worth individuals. By creating a large network of firms that operate under a partnership but maintained independently, they are able to provide high quality of service under one brand name, and share resources and data that are not available to small and mid-sized firms. All of the “big four” firms provide tax, audit/assurance, and advisory services to their respective clients. Tax services include but are not limited to state and local tax (SALT), international taxation, global trade and compliance, and private client services. Assurance services are comprised of financial compliance and reporting, sustainability assurance, financial statement audits, and fraud investigation & dispute services. Lastly, advisory services include any consulting engagement not within tax or assurance services. Advisory services can be performance improvement, IT risk and assurance, financial risk management, and transaction services (mergers & acquisitions and due diligence). The size and revenue of the different service lines vary by firm due to

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