The accounting industry in the United States plays a critical role in guiding businesses toward financial transparency, compliance, and growth. Whether dealing with tax planning, auditing, mergers and acquisitions, or forensic accounting, the top firms deliver unmatched expertise to companies ranging from startups to multinationals. Let’s explore the top five accounting firms in the USA—those that have reshaped the profession through innovation, scale, and an enduring commitment to excellence.
1. Deloitte
Deloitte is consistently ranked as one of the largest and most influential accounting firms in not just the U.S., but the world. With a presence in over 150 countries and more than 415,000 employees globally, its American operations remain one of its strongest arms.
- Headquarters: New York City, NY
- Founded: 1845 (Global), Deloitte US in 1895
- Specialties: Auditing, financial advisory, consulting, tax services, risk management
Deloitte is especially known for its cutting-edge use of technology in auditing and tax advisory services. It’s a favorite among Fortune 500 companies and a pioneer in integrating AI and analytics into financial services.
2. PricewaterhouseCoopers (PwC)
PwC continues to hold a dominant role among the “Big Four” accounting firms. Known for its strong consulting capabilities and a client list that spans almost every industry, PwC has earned a reputation for delivering exceptional, tailored services.
- Headquarters: New York City, NY
- Founded: 1998 (Merger of Price Waterhouse and Coopers & Lybrand)
- Specialties: Assurance, tax services, digital transformation, cybersecurity, ESG consulting
The firm invests heavily in digital tools and platforms that help businesses navigate complex issues like global tax regulation and sustainability. PwC’s hands-on approach and innovative strategies make it a preferred choice for companies undergoing transformation.
3. Ernst & Young (EY)
EY is renowned for its global reach and significant emphasis on entrepreneurship and innovation. Its U.S. division is a vital component of its global operations, offering services tailored to both large enterprises and middle-market businesses.
- Headquarters: New York City, NY
- Founded: 1989 (Merger of Ernst & Whinney and Arthur Young)
- Specialties: Auditing, IT risk services, transaction advisory, wealth & asset management
An interesting hallmark of EY is its commitment to building a better working world by focusing on long-term value creation. The firm is also a leader in diversity and inclusion efforts within the accounting sector.
4. KPMG
KPMG might be the smallest in size among the Big Four, but it remains a juggernaut in key industries such as healthcare, financial services, and government contracting. The U.S branch offers high-end solutions that go beyond traditional accounting services.
- Headquarters: New York City, NY
- Founded: 1987 (Merger of Peat Marwick International and Klynveld Main Goerdeler)
- Specialties: Audit, tax, consulting, forensic accounting, regulatory compliance
KPMG’s strength lies in its approach to risk management and sustainability reporting. It has also been hailed for its top-tier training programs and use of cloud-based technologies to enhance data transparency.
5. BDO USA
BDO USA often flies under the radar compared to the Big Four, but it should not be overlooked. With a network that spans over 160 countries and a strong domestic presence, BDO delivers agile and personalized services that appeal especially to mid-sized and rapidly growing companies.
- Headquarters: Chicago, IL
- Founded: 1910
- Specialties: Assurance, tax planning, business valuation, advisory, real estate consulting
BDO stands apart with its focus on industry-specific services and strong local presence with over 65 offices throughout the U.S. It’s an alternative for businesses seeking high-quality service without the intricacies of a massive firm.
Why These Firms Matter
These top-tier accounting firms shape the economy by ensuring transparency, reducing fraud, and improving performance across sectors. They are also key influencers in setting global accounting standards and practices. Moreover, these firms are highly sought after by young professionals for their career development programs, mentorship, and global reach.
As companies face increasing complexities in the realms of digital transformation, regulatory compliance, and corporate responsibility, these firms aren’t just number crunchers—they’re strategic advisors. In a fast-changing business landscape, their role is more important than ever.
