Industry snapshot
Key public data points
Historical & forecast
Base year 2025. Each series is official through its own latest government-data year (shown in the legend on each chart), and years beyond that are Claight estimates. As of July 2026 the current year is still in progress (2026 annual data is not yet published), so the forecast runs to 2030.
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Connect to an analyst →Industry Definition and Scope
What does the Accounting Services in the US industry cover?
The accounting services industry encompasses businesses that prepare and examine financial records, ensure accuracy, compute taxes, and provide advice to clients on financial matters. This includes public accounting firms, tax preparation services, payroll processing companies, and internal audit functions within organizations.
- •Includes firms providing financial audit services required by the Sarbanes-Oxley Act for publicly traded companies
- •Covers services ranging from basic bookkeeping to complex forensic accounting and corporate finance consulting
- •Encompasses both large international networks and small local accounting practices
Market Structure and Operators
Who operates in the industry and how is it structured?
The accounting services market consists of a diverse range of providers from the 'Big Four' international firms to regional practices and sole practitioners. The market is characterized by high barriers to entry for full-service auditing due to regulatory requirements.
- •The Big Four accounting firms (Deloitte, EY, PwC, and KPMG) collectively audit approximately 99% of Fortune 500 companies
- •According to the American Institute of CPAs, there are approximately 46,000 public accounting firms in the US (AICPA Statistics 2022)
- •The IRS reported processing approximately 155 million individual tax returns in 2023 (IRS Data Book 2023)
Demand Drivers
What drives demand in the industry?
Demand for accounting services is driven by regulatory requirements, business expansion, tax complexity, and evolving financial reporting standards. The increasing need for data analytics and advisory services is reshaping traditional accounting offerings.
- •Corporate tax reform and changing federal regulations increase compliance requirements
- •Small business growth creates demand for outsourced accounting services
- •Technological advances require accounting professionals to develop new skillsets in data analytics and cybersecurity
Competitive Landscape and Notable Public Companies
Who are the notable companies in the industry?
The competitive landscape includes both major international accounting networks and specialized public companies providing accounting-related services. Technology integration is becoming a key differentiator in the market.
- •Deloitte & Touche LLP provides audit, tax, consulting, and advisory services to Fortune 500 companies
- •Ernst & Young LLP operates in 150 countries offering assurance, tax, transaction, and advisory services
- •PwC (PricewaterhouseCoopers LLP) serves multiple industries with audit and assurance services
- •KPMG LLP provides professional services including audit, tax, and advisory solutions
Recent Trends and Outlook
What are the recent trends and outlook?
The industry is experiencing significant transformation through digitalization, automation, and shifting client expectations. Focus areas include ESG reporting, cybersecurity consulting, and value-added advisory services beyond compliance.
- •The IRS reported a 15% increase in electronic filings for individual tax returns in 2023 (IRS Data Book 2023)
- •According to the Bureau of Labor Statistics, employment for accountants and auditors is projected to grow 4% from 2022 to 2032 (BLS Occupational Outlook Handbook 2022-23)
- •The AICPA reports that 37% of accounting firms are investing in AI and machine learning technologies (AICPA Technology Trends 2023)
Regulation and Compliance
How is the industry regulated?
The industry is heavily regulated by federal and state agencies, with stringent requirements for audit quality and ethical standards. Recent regulatory developments focus on cybersecurity, data privacy, and ESG reporting standards.
- •The Public Company Accounting Oversight Board (PCAOB) oversees audits of public companies and sets auditing standards
- •The Sarbanes-Oxley Act of 2002 imposes strict requirements on corporate governance and financial disclosures
- •State boards of accountancy regulate CPA licensing and practice requirements
- •SEC regulations mandate financial disclosures and reporting requirements for public companies
Sources
Government, statistical and trade sources used for this Claight analysis.
- U.S. Bureau of Labor Statistics Occupational Outlook Handbook 2022-23 ·
- American Institute of CPAs Statistics 2022 ·
- Internal Revenue Service Data Book 2023 ·
- Public Company Accounting Oversight Board (PCAOB) ·
- Securities and Exchange Commission (SEC)
Claight analysis of public industry data.