Looking for the best accounting firms in the USA? Whether you are a startup founder, a growing business, or a large enterprise, choosing the right accounting partner can directly influence your financial clarity, compliance, and long-term growth.
The United States has one of the most complex financial and regulatory systems in the world. Businesses must manage tax filings, financial reporting, audits, compliance requirements, payroll, and strategic financial planning. Without the right accounting support, these responsibilities can quickly become overwhelming.
This is where professional accounting firms play a critical role. The right firm does not just handle numbers. It helps businesses optimize tax efficiency, stay compliant with regulations, plan financial growth, and make better strategic decisions. For many companies, accounting partners act as long-term advisors rather than just service providers.
In this guide, we have compiled a list of the top accounting firms in the USA that businesses can consider. These firms are selected based on their reputation, service range, global presence, and overall value for different types of clients, from startups to multinational corporations.
Whether you need audit services, tax advisory, bookkeeping, or financial consulting, this list will help you understand which firms are best suited for your needs and what each one brings to the table.
Quick List
- Deloitte
- PwC
- EY
- KPMG
- BDO USA
- RSM US
- Grant Thornton
- Crowe
- Baker Tilly
- Moss Adams
How We Ranked These Firms
Our rankings are based on a combination of service capabilities, global presence, industry expertise, and overall usefulness for businesses operating in the United States.
- Audit, tax, and advisory service depth
- Global and national presence
- Industry specialization
- Client portfolio and reputation
- Support for startups vs enterprises
- Scalability of services
Note: Rankings are editorial and may evolve based on market changes and firm positioning.
Top Firms
1. Deloitte
Deloitte is one of the largest professional services firms globally and a dominant force in the USA accounting market. It provides a full suite of services including audit, consulting, tax, and financial advisory. The firm is known for working with Fortune 500 companies and large enterprises.
Deloitte’s strength lies in its ability to combine accounting with deep consulting capabilities. This makes it particularly useful for businesses undergoing transformation, expansion, or complex restructuring.
Best for: large enterprises, global corporations
Services: audit, tax, consulting, risk advisory
Website: Visit Deloitte
2. PwC
PwC is another Big Four firm with strong presence across the United States. It is widely recognized for its audit and assurance services, as well as strategic advisory capabilities.
PwC works across multiple industries and is known for delivering structured financial insights and compliance support for complex organizations.
Best for: enterprise-level accounting and advisory
Services: audit, assurance, tax, consulting
Website: Visit PwC
3. EY
EY focuses heavily on assurance, tax, and advisory services, with a strong emphasis on business transformation and long-term growth strategies.
The firm is particularly relevant for companies looking to combine accounting with strategic advisory.
Best for: transformation-focused businesses
Services: assurance, tax, advisory
Website: Visit EY
4. KPMG
KPMG offers strong audit, tax, and advisory services with a global network supporting multinational businesses.
Best for: compliance-heavy industries
Services: audit, tax, advisory
Website: Visit KPMG
5. BDO USA
BDO is one of the largest accounting networks outside the Big Four and is known for serving mid-sized businesses and growing enterprises.
Best for: mid-market companies
Services: audit, tax, advisory
Website: Visit BDO
6. RSM US
RSM focuses on middle-market businesses, offering tailored accounting and consulting services.
Best for: mid-sized businesses
Services: audit, tax, consulting
Website: Visit RSM
7. Grant Thornton
Grant Thornton offers advisory-led accounting services with strong expertise in helping businesses grow and transform.
Best for: advisory-driven accounting
Services: audit, tax, advisory
Website: Visit Grant Thornton
8. Crowe
Crowe is known for industry-focused accounting solutions, particularly in healthcare and financial services.
Best for: industry-specific accounting
Services: audit, tax, consulting
Website: Visit Crowe
9. Baker Tilly
Baker Tilly provides a wide range of accounting and advisory services for businesses of all sizes.
Best for: growing businesses
Services: audit, tax, advisory
Website: Visit Baker Tilly
10. Moss Adams
Moss Adams is a leading accounting firm focused on providing services to middle-market companies in the USA.
Best for: regional and mid-market clients
Services: accounting, consulting, tax
Website: Visit Moss Adams
Comparison Table
| Firm | Best For | Core Strength |
|---|---|---|
| Deloitte | Enterprises | Global scale |
| PwC | Large businesses | Audit expertise |
| EY | Transformation | Advisory |
| KPMG | Compliance | Global network |
| BDO | Mid-market | Scalability |
| RSM | Mid-size firms | Customization |
| Grant Thornton | Growth | Advisory focus |
| Crowe | Industries | Specialization |
| Baker Tilly | SMEs | Flexibility |
| Moss Adams | Regional | Local expertise |
Final Thoughts
The USA offers a wide range of accounting firms, from global giants to mid-market specialists. The right firm depends on your business size, complexity, and growth plans.
Choosing the right accounting partner is not just about compliance. It is about building a long-term financial strategy that supports your business growth.
