**GAO-08-163**                      Published: Jan 09, 2008. Publicly Released: Jan 09, 2008.                  

-   
-   
-   
-   

    Jump To:  
-  Elder Abuse 
-  Services for Older Adults 
-  State and Local-Level Drivers and Trends 
-  State and Local Fiscal Projections 
-  Federal Borrowing 
-  Managing the Debt 
-  Summary of Funding Provisions 
-  Auditing the Government's Books 
-  Unpacking the Financial Report 
-  Highlights 
-  Recommendations 
-  Background 
-  About This Work 
-  About This Work 
-  Trends 
-  About the Center 
-  Why It's High Risk 
-  What Remains To Be Done 
-  Key Reports 
-  Newest COVID-Related Reports 
-  AI Use Cases 
-  Flood Insurance 
-  Past Pandemic-Related Reports 
-  CARES Act Oversight Reports 
-  All COVID-19 Reports 
-  Report Suspected Fraud 
-  Subjects 
-  How to Get Notified 
-  Past Reports 
-  Public Health Threats 
-  Explore the FY 2022 and 2023 Funds 
-  Status of FY22 Projects 
-  Lessons Learned 
-  Agency Reports 
-  Recent Reports 
-  Recommendations 
-  Supplemental Material 
-  Full Report 
-  Additional Data 
-  View Decision 
-  Downloads 
-  Previously Identified Actions 
-  Related Pages 
-  Associated Agencies 
-  Tough Choices and Opportunities Ahead 
-  Americas Fiscal Future Key Areas 
-  Retirement Security Key Areas 
-  Current List 
-  About The High Risk List 
-  Area Ratings 
-  Previous High Risk Products 
-  Search Federal Vacancies 
-  Past Federal Vacancies 
-  Violation Letters 
-  About the Yellow Book 
-  Advisory Council 
-  Related Resources 
-  Comment Letters 
-  Related Publications 
-  Contacts and Resources 
-  Major Issues Facing the Nation 
-  Meeting Strategic Challenges 
-  Additional Resources 
-  Resources 
-  GAO Contacts 
-  Mission Teams 
-  Operations and Staff Offices  
-  Organization Chart  
-  Why a Career at GAO? 
-  Am I Qualified? 
-  Company Culture 
-  Reasonable Accommodations 
-  Video Gallery 
-  Paid Internships 
-  Student Volunteers 
-  Professional Development Program 
-  Advancement 
-  Executive Candidate Program 
-  Summer Associates 
-  Externships 
-  Benefits 
-  Contacts 

Skip to Highlights

## Highlights

GAO has prepared this report under the Comptroller General's authority as part of a continued effort to assist Congress in reviewing concentration in the market for public company audits. The small number of large international accounting firms performing audits of almost all large public companies raises interest in potential effects on competition and the choices available to large companies needing an auditor. This report examines (1) concentration in the market for public company audits, (2) the potential for smaller accounting firms' growth to ease market concentration, and (3) proposals that have been offered by others for easing concentration and the barriers facing smaller firms in expanding their market shares. GAO surveyed a random sample of almost 600 large, medium, and small public companies on their experiences with their auditors. GAO also interviewed the four largest accounting firms and surveyed all other U.S. accounting firms that audit at least one public company. GAO also developed an econometric model that analyzed the extent to which various factors, including concentration and new auditing requirements, affected fee levels. To supplement this work, GAO interviewed market participants, including public companies, investors, accounting firms, academics, and regulators. This report makes no recommendations.

## Full Report

Highlights

Full Report (120 pages)

Accessible Text 

## Office of Public Affairs

### Media Inquiries

Sarah Kaczmarek
kaczmareks@gao.gov

(202) 512-4800

### Public Inquiries

Public Affairs
PublicAffairs@gao.gov

(202) 512-4800

## Topics

Auditing and Financial Management

AccountantsAuditing proceduresAuditing standardsAuditorsAuditsCompetitionCorporate auditsFeesProgram evaluationReporting requirementsAccounting proceduresCost accountingAccounting standards