Choosing the right Accounting Firms is one of the most important decisions a business can make. In today’s competitive global market, top firms like Deloitte, PwC, EY, and KPMG dominate the headlines — but small businesses and startups also need reliable, affordable partners who deliver world-class services without the high corporate price tags.
In this guide, we’ll explore the Top 10 Accounting Firms in the World (2025) — what makes them industry leaders, their areas of expertise, and how 5K Advisory offers a smart, cost-effective alternative for startups and small business owners looking for personalized accounting and financial advisory services.
Why Choosing the Right Accounting Firms Matters
Whether you’re a startup or an established company, the right Accounting Firm can do more than balance your books. They provide:
- Financial strategy and tax compliance
- Audit and assurance services
- Business and risk advisory
- Cloud-based bookkeeping solutions
- Payroll and compliance management
Top firms combine deep industry expertise with technology and data insights — and emerging firms like 5K Advisory follow the same professional standards, offering tailored accounting solutions designed specifically for small business growth.
The Top 10 Global Accounting Firms (2025 Rankings)
Below is a summary table of the Top 10 Global Accounting Firms based on annual revenue, service diversity, and global presence.
| Rank | Accounting Firm | Key Services | 2024 Revenue (Approx.) |
|---|---|---|---|
| 1 | Deloitte | Audit, Tax, Consulting | $67.2B |
| 2 | PwC (PricewaterhouseCoopers) | Audit, Tax, Advisory | $55.4B |
| 3 | EY (Ernst & Young) | Audit, Consulting, Tax | $51.2B |
| 4 | KPMG | Audit, Advisory, Risk | $38.4B |
| 5 | BDO International | Audit, Tax, Business Advisory | $14.0B |
| 6 | RSM International | Audit, Tax, Consulting | $9B |
| 7 | Grant Thornton | Audit, Advisory, Outsourcing | $7.5B |
| 8 | Baker Tilly International | Accounting, Tax, Advisory | $5B |
| 9 | Nexia International | Audit, Tax, Consulting | $4.5B |
| 10 | Crowe Global | Audit, Tax, Risk Consulting | $4B |
Overview of the Top 10 Accounting Firms
The year 2025 is graced with several establishments and start-ups that reign over the industry. These accounting firms are prominent in terms of their revenues, reputation, and comprehensive service offerings.
From the ‘Big 4’ to the mid-sized, the following is a brief overview of them.
Deloitte
The largest accounting company in the US has earnings of $67.2 billion (2024). They are significantly known for their interests in green technology and AI-driven systems.
PwC (PricewaterhouseCoopers)
This organization has been honored as the most prestigious in 2025 for accounting services. They have been acclaimed as the best in public accounting for the year 2026 by Vault. PwC caters to a vast majority of the Fortune Global 500 companies. Their transnational revenue sums up to $55.4 billion in 2024.
Ernst & Young (EY)
The global chair and CEO of EY is Janet Truncale. She has the honor of becoming the first woman to lead one of the Big 4 companies. She strongly stresses unity and strategic growth. The agency is worth $51.2 billion for the year 2024.
KPMG
KPMG is valued at $38.4 billion. Over the past year, the venture has successfully achieved strong income increment amongst the Big 4. The achievement is credited to the breakthroughs in tech infrastructure and ESG initiatives.
BDO International
BDO provides mid-market businesses with customized accounting and assurance services. Its flexible structure makes it ideal for SMEs expanding globally.
Although the central office is based in Belgium, it continues to expand its universal presence. Albeit standing at $14.0 billion in international sales, resumes to serve clients across various industries.
RSM International
This accounting company is ranked 6th in Vault’s 2026 Accounting 25 list. Their main aim is to provide assurance, tax, and consulting assistance to middle-tier segments.
Grant Thornton
Have a worldwide revenue of $7.5 billion as of 2023. The headquarters are situated in the United Kingdom. The office is known for its tailored approach to client assistance and commitment to quality.
Baker Tilly International
Baker Tilly emphasizes technology adoption and sustainable financial planning for businesses of all sizes.
Nexia International
A robust network serving clients in more than 120 countries, Nexia specializes in cross-border audit and tax strategies.
Crowe Global
Crowe offers expertise in risk consulting, tax, and financial advisory, emphasizing industry-specific solutions.
5K Advisory — The Smart Choice for Startups & Small Business Owners
While global giants serve large corporations, 5K Advisory bridges the gap for entrepreneurs, small business owners, and startups who need affordable, transparent, and expert accounting services without sacrificing quality.
Why 5K Advisory stands out
- Tailored accounting and CFO advisory for small businesses
- Cloud-based bookkeeping and financial automation
- Strategic tax planning and compliance for startups
- Personalized consultation — not just reports and numbers
- Competitive pricing and responsive support
Just like the top accounting firms, 5K Advisory brings the same professional excellence with an agile, client-first approach designed to help new businesses grow sustainably.
How to Choose the Right Accounting Firms for Your Business
When comparing Accounting Firms, look beyond size or name recognition. Evaluate:
- Experience in your industry (tech, retail, healthcare, etc.)
- Pricing transparency and scalability
- Cloud accounting tools and automation options
- Tax compliance expertise for your region
- Personalized support and ongoing advisory
If you’re a startup or small business, a firm like 5K Advisory offers direct communication, real-time reporting, and financial clarity that large firms often can’t match.
FAQs
What services do Accounting Firms provide?
Most Accounting Firms offer auditing, bookkeeping, payroll, tax planning, business consulting, and financial reporting. Some, like 5K Advisory, also provide outsourced CFO and financial advisory services.
Which Accounting Firms is best for startups?
For startups, affordability and expertise matter most. While firms like EY and PwC are global leaders, 5K Advisory is a top choice for new and small businesses due to its flexible pricing and personalized approach.
How can I select the best Accounting Firm for my small business?
Look for firms that understand your growth stage, provide digital tools, and communicate proactively. Local or boutique firms such as 5K Advisory can deliver faster and more tailored results than global corporations.
What makes 5K Advisory different from large Accounting Firms?
5K Advisory combines the professionalism of top global firms with personalized service, making it ideal for startups that need both financial strategy and day-to-day accounting support.
Conclusion
The world’s Top Accounting Firms—from Deloitte and PwC to EY and KPMG—set the gold standard for financial expertise. However, startups and small businesses often need a partner who understands their unique challenges and budgets.
That’s where 5K Advisory excels. With a focus on affordability, accuracy, and proactive guidance, 5K Advisory delivers the same quality you’d expect from the world’s biggest accounting firms — tailored perfectly for entrepreneurs, small business owners, and emerging companies aiming for sustainable growth.