Top 20 Audit Firms Worldwide
This article highlights 20 of the leading audit firms worldwide, from the Big Four — Deloitte, PwC, EY and KPMG — to other major international networks and established mid-tier firms. These firms help businesses navigate financial reporting requirements, strengthen internal controls and maintain confidence in their financial statements.
The list takes into account each firm's international presence, reputation, range of audit and assurance services, and position in the accounting industry. It is intended as a practical overview rather than a definitive ranking, as the right firm will depend on the size of the business, its sector, geographical footprint and specific audit requirements.
No. 1: Deloitte
Global Audit, Assurance, and Professional Services Firm
Deloitte is one of the world's largest professional services networks, providing audit and assurance, consulting, tax, risk advisory, and financial advisory services. Its audit teams help organizations assess the accuracy of their financial statements, strengthen reporting processes, and meet regulatory requirements.
The firm serves clients across a broad range of industries, including financial services, consumer goods, technology, energy, manufacturing, healthcare, and telecommunications. With an extensive international network, Deloitte works with multinational corporations, public-interest entities, public-sector organizations, and privately owned businesses.
🔗 Website: https://www.deloitte.com/
No. 2: PwC (PricewaterhouseCoopers)
Global Audit, Assurance, and Professional Services Network
PwC is one of the world's leading professional services networks, offering audit and assurance, tax, and business advisory services. Its audit teams help organizations improve the reliability of financial reporting, comply with accounting standards, and maintain transparency with investors, regulators, and other stakeholders.
PwC serves clients across industries such as banking, insurance, technology, energy, consumer markets, healthcare, industrial manufacturing, and telecommunications. Its international network supports multinational groups, listed companies, public-sector entities, and privately owned businesses with complex reporting and compliance requirements.
🔗 Website: https://www.pwc.com/
No. 3: EY (Ernst & Young)
Global Audit, Assurance, and Professional Services Firm
EY is a major international professional services firm providing audit and assurance, tax, consulting, and transaction advisory services. Its audit teams help businesses assess the reliability of financial information, meet regulatory obligations, and strengthen confidence among investors and other stakeholders.
EY works with organizations across sectors including financial services, technology, energy, consumer products, healthcare, manufacturing, and real estate. Its global network supports multinational corporations, listed companies, public-sector entities, and growing businesses facing complex financial reporting and governance requirements.
🔗 Website: https://www.ey.com/
No. 4: KPMG
Global Audit, Tax, and Advisory Firm
KPMG is one of the world's leading professional services organizations, providing audit and assurance, tax, and advisory services. Its audit practice helps companies and institutions assess the accuracy of financial statements, improve internal controls, and comply with relevant accounting standards and regulatory requirements.
KPMG serves clients across industries including banking, insurance, asset management, energy, technology, healthcare, consumer markets, and industrial manufacturing. Its international network supports multinational groups, listed companies, public-sector organizations, and privately owned businesses with financial reporting, governance, and risk management needs.
🔗 Website: https://kpmg.com/
No. 5: BDO
International Audit, Tax, and Advisory Network
BDO is a major international professional services network offering audit and assurance, tax, and advisory services. Its audit teams help organizations improve financial reporting reliability, meet statutory and regulatory obligations, and strengthen their internal control and governance frameworks.
BDO serves businesses across a wide range of sectors, including financial services, manufacturing, technology, real estate, healthcare, retail, and professional services. Its international network combines local market knowledge with cross-border capabilities, supporting privately owned companies, growing businesses, multinational groups, and public-interest entities.
🔗 Website: https://www.bdo.global/
No. 6: Grant Thornton
Global Audit, Assurance, Tax, and Advisory Firm
Grant Thornton is an international professional services network providing audit and assurance, tax, and advisory services. Its audit practice helps organizations strengthen financial reporting, comply with accounting standards, and improve transparency, governance, and risk management.
The firm works with clients across sectors including financial services, technology, manufacturing, healthcare, real estate, consumer markets, and energy. Grant Thornton is particularly active in supporting privately held businesses, mid-market companies, growing enterprises, and international groups seeking both local expertise and cross-border support.
🔗 Website: https://www.grantthornton.global/
No. 7: RSM
Global Audit, Tax, and Consulting Network
RSM is a leading international network of audit, tax, and consulting firms focused on serving middle-market businesses. Its audit and assurance services help organizations assess financial reporting, meet statutory requirements, and strengthen internal controls and corporate governance.
RSM works with companies across industries including financial services, manufacturing, technology, real estate, healthcare, energy, and consumer markets. The network combines local market knowledge with international capabilities to support growing businesses, privately owned companies, and multinational groups operating across multiple jurisdictions.
🔗 Website: https://www.rsm.global/
No. 8: Crowe
International Audit, Tax, and Advisory Network
Crowe is an international professional services network providing audit, tax, and advisory services to businesses and organizations. Its audit teams help clients improve the reliability of financial statements, meet regulatory requirements, and strengthen internal controls and risk management practices.
Crowe serves a broad range of industries, including financial services, healthcare, technology, manufacturing, real estate, hospitality, and consumer markets. Its network supports privately owned businesses, mid-sized companies, multinational groups, and public-interest entities, combining local expertise with international reach.
🔗 Website: https://www.crowe.com/
No. 9: Baker Tilly
International Audit, Tax, and Business Advisory Firm
Baker Tilly is a global network of independent accounting and advisory firms offering audit and assurance, tax, and business consulting services. Its audit teams help organizations assess the accuracy of financial statements, meet regulatory requirements, and improve financial reporting and internal control processes.
The network serves clients across industries including manufacturing, financial services, technology, real estate, healthcare, retail, and professional services. Baker Tilly supports privately owned businesses, family-owned companies, mid-market organizations, and international groups, combining local market knowledge with access to cross-border expertise.
🔗 Website: https://www.bakertilly.global/
No. 10: Forvis Mazars
International Audit, Tax, and Advisory Firm
Forvis Mazars is an international professional services organization offering audit and assurance, tax, and advisory services. Its audit teams help businesses and institutions strengthen the reliability of financial reporting, comply with accounting standards, and improve transparency and governance.
The firm serves clients across a wide range of industries, including financial services, manufacturing, energy, technology, healthcare, consumer markets, and real estate. With an international presence and a strong audit practice, Forvis Mazars works with privately owned businesses, listed companies, public-interest entities, and multinational groups.
🔗 Website: https://www.forvismazars.com/
No. 11: Moore Global
International Audit, Accounting, and Advisory Network
Moore Global is an international network of independent accounting and consulting firms providing audit and assurance, tax, accounting, and business advisory services. Its audit professionals help organizations improve financial reporting, meet regulatory obligations, and strengthen their governance and internal control frameworks.
The network serves clients across industries including financial services, manufacturing, technology, real estate, healthcare, energy, and professional services. Moore Global supports privately owned businesses, mid-market companies, international groups, and public-interest entities, combining local expertise with access to a global network of professionals.
🔗 Website: https://www.moore-global.com/
No. 12: Nexia
Global Audit, Accounting, and Advisory Network
Nexia is an international network of independent accounting and consulting firms offering audit and assurance, tax, and advisory services. Its audit teams help organizations maintain reliable financial reporting, comply with applicable accounting standards, and strengthen internal controls and corporate governance.
The network works with clients across industries such as financial services, manufacturing, technology, real estate, healthcare, energy, and consumer markets. Nexia supports privately owned businesses, growing companies, mid-market organizations, and international groups that need local expertise and coordinated cross-border services.
🔗 Website: https://www.nexia.com/
No. 13: PKF
Global Audit, Accounting, and Business Advisory Network
PKF is an international network of independent accounting and advisory firms providing audit and assurance, tax, accounting, and business consulting services. Its audit professionals help organizations improve the quality of financial reporting, meet statutory obligations, and strengthen internal controls and risk management processes.
The network serves clients across industries including financial services, manufacturing, technology, real estate, healthcare, hospitality, and retail. PKF supports privately owned businesses, growing companies, mid-market organizations, and international groups seeking local expertise alongside cross-border capabilities.
🔗 Website: https://www.pkf.com/
No. 14: HLB International
Global Audit, Tax, and Business Advisory Network
HLB International is a global network of independent advisory and accounting firms offering audit and assurance, tax, and business consulting services. Its audit professionals help organizations improve financial reporting, comply with regulatory requirements, and reinforce governance and internal control practices.
HLB serves clients across sectors including financial services, manufacturing, technology, real estate, healthcare, energy, and consumer markets. The network supports privately owned businesses, mid-sized companies, growing enterprises, and international groups, combining local market knowledge with access to a worldwide professional network.
🔗 Website: https://www.hlb.global/
No. 15: CLA Global
International Audit, Accounting, and Advisory Network
CLA Global is an international network of independent accounting and advisory firms providing audit and assurance, tax, accounting, and consulting services. Its member firms help organizations improve financial reporting, meet compliance requirements, and strengthen internal controls and business processes.
The network serves clients across industries including financial services, manufacturing, technology, healthcare, real estate, and consumer markets. CLA Global supports privately owned businesses, mid-market companies, growing enterprises, and international organizations seeking local expertise and coordinated cross-border support.
🔗 Website: https://www.claglobal.com/
No. 16: Crowe Global
International Audit, Tax, and Advisory Network
Crowe Global is an international network of independent accounting and advisory firms providing audit and assurance, tax, and consulting services. Its audit professionals help organizations maintain reliable financial statements, meet regulatory requirements, and improve internal controls and risk management.
The network serves clients across sectors including financial services, manufacturing, technology, healthcare, real estate, hospitality, and energy. Its member firms work with privately owned businesses, mid-market companies, multinational groups, and public-interest entities, combining local market knowledge with international capabilities.
🔗 Website: https://www.crowe.com/
No. 17: S&W (Shaw & Co)
UK-Based Audit, Tax, and Advisory Firm
S&W is a UK-based professional services firm providing audit and assurance, tax, corporate finance, and business advisory services. Its audit teams help organizations meet statutory reporting requirements, improve financial transparency, and strengthen internal controls and governance.
The firm works with clients across sectors including financial services, technology, real estate, manufacturing, healthcare, and professional services. S&W supports privately owned businesses, entrepreneurs, owner-managed companies, and mid-market organizations with audit and advisory services tailored to their needs.
🔗 Website: https://www.swgroup.com/
No. 18: UHY International
Global Audit, Accounting, and Advisory Network
UHY International is a network of independent accounting and consulting firms providing audit and assurance, tax, accounting, and business advisory services. Its audit professionals help organizations improve financial reporting, comply with statutory requirements, and strengthen governance and internal control processes.
The network serves clients across industries including financial services, manufacturing, technology, real estate, healthcare, energy, and consumer markets. UHY supports privately owned businesses, mid-sized companies, growing enterprises, and international groups seeking local expertise and cross-border coordination.
🔗 Website: https://www.uhy.com/
No. 19: Russell Bedford International
International Audit, Accounting, and Business Advisory Network
Russell Bedford International is a global network of independent accounting firms offering audit and assurance, tax, accounting, and business advisory services. Its member firms help organizations meet financial reporting obligations, strengthen internal controls, and address regulatory requirements across different jurisdictions.
The network works with businesses ranging from privately owned companies and growing enterprises to larger international groups. Its combination of local market knowledge and international collaboration supports clients operating across borders and across sectors, including manufacturing, professional services, technology, and financial services.
🔗 Website: https://www.russellbedford.com/
No. 20: Allinial Global
International Association of Independent Accounting and Advisory Firms
Allinial Global is an international association of independent accounting and advisory firms providing audit and assurance, tax, accounting, and consulting services. Its members help businesses improve financial transparency, meet statutory reporting requirements, strengthen internal controls, and manage financial and regulatory challenges.
The association connects local firms with international expertise, supporting privately held businesses, mid-market companies, and organizations with cross-border operations. Its collaborative model combines knowledge of local markets with access to professional resources and expertise across multiple jurisdictions.
🔗 Website: https://www.allinialglobal.com/
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