GITNUXREPORT 2026

Public Accounting Industry Statistics

Big Four audits still dominate the public-company audit market with 98% share in 2023, yet PCAOB inspections flagged deficiencies in 40% of audits the same year. Pair that tension with 25,000 average audit hours at Fortune 500 firms and $1.5 million average SOX 404 costs per issuer to see exactly where scrutiny, time, and expense collide across audit, assurance, tax, and advisory work.

95 statistics5 sections7 min readUpdated 18 days ago

Statistic 1

Global public company audits conducted by Big Four: 98% market share in 2023

Statistic 2

U.S. public companies changing auditors: 4.2% rate in 2023

Statistic 3

Average audit hours for Fortune 500 firms: 25,000 in 2023

Statistic 4

PCAOB inspections found deficiencies in 40% of audits in 2023

Statistic 5

SOX 404 audit costs averaged $1.5 million per issuer in 2023

Statistic 6

Big Four audit market concentration: 95% for largest clients in 2023

Statistic 7

Integrated audits grew 15% in demand post-2023 regulations

Statistic 8

Audit quality scores: Deloitte 92/100 in PCAOB 2023 review

Statistic 9

PwC audit remediation rate 85% for 2023 deficiencies

Statistic 10

EY global audits: 12,000 public company audits in 2023

Statistic 11

KPMG audit backlog reduced by 20% in 2023 initiatives

Statistic 12

Non-audit services banned in 25% of PCAOB cases in 2023

Statistic 13

Crypto asset audits: 150 engagements in 2023 by major firms

Statistic 14

Audit committee oversight meetings averaged 9 per year in 2023

Statistic 15

Revenue recognition audits: 30% increase in scrutiny 2023

Statistic 16

Internal audit outsourcing: 60% of public firms in 2023

Statistic 17

PCAOB fines for audit failures totaled $100 million in 2023

Statistic 18

Sustainability assurance standards adopted by 70% of audits in 2023 EU

Statistic 19

U.S. CPA firms employment totaled 1.4 million in 2023

Statistic 20

Big Four employed over 1.2 million people globally in 2023

Statistic 21

Women comprise 62% of public accounting workforce in U.S. entry-level positions

Statistic 22

Average U.S. CPA salary was $134,000 in 2023

Statistic 23

75,000 new CPAs licensed in U.S. annually as of 2023

Statistic 24

Public accounting turnover rate averaged 19% in 2023 U.S. firms

Statistic 25

45% of public accountants in U.S. are millennials in 2023

Statistic 26

Global accounting talent shortage affects 80% of firms in 2023 survey

Statistic 27

U.S. public accounting added 50,000 jobs in 2023

Statistic 28

Diversity: 22% of partners in U.S. CPA firms are women in 2023

Statistic 29

Remote work adopted by 70% of public accounting firms post-2023

Statistic 30

Median tenure for public accountants is 4.2 years in U.S.

Statistic 31

15% increase in accounting internships offered in 2023

Statistic 32

PwC hired 20,000 new graduates globally in 2023

Statistic 33

EY workforce diversity: 50% non-white employees in 2023

Statistic 34

KPMG U.S. staff count reached 36,000 in 2023

Statistic 35

Deloitte U.S. professionals total 120,000 in 2023

Statistic 36

Public accounting age demographics: 40% under 35 in 2023

Statistic 37

The global public accounting services market was valued at approximately $642 billion in 2022

Statistic 38

U.S. public accounting industry revenue reached $179.5 billion in 2023

Statistic 39

The Big Four accounting firms collectively generated over $212 billion in global revenue in 2022

Statistic 40

Public accounting market in North America grew by 5.2% CAGR from 2018-2023

Statistic 41

Asia-Pacific public accounting sector expected to grow at 7.1% CAGR through 2030

Statistic 42

U.S. accounting firms numbered over 46,000 in 2023

Statistic 43

Global forensic accounting market within public accounting projected to reach $10.2 billion by 2027

Statistic 44

European public accounting revenue hit €250 billion in 2022

Statistic 45

Cloud accounting software adoption drove 4.8% market expansion in 2023

Statistic 46

U.S. small business accounting services segment valued at $45 billion in 2023

Statistic 47

Deloitte's global revenue from audit and assurance was $29.3 billion in FY2023

Statistic 48

PwC worldwide revenue grew 12% to $53.1 billion in FY2023

Statistic 49

EY global revenue reached $49.9 billion in FY2023, up 11.3%

Statistic 50

KPMG international revenue hit $36.8 billion in FY2023

Statistic 51

Public accounting M&A deals in U.S. totaled 104 in 2023

Statistic 52

Indian public accounting market size estimated at $15 billion in 2023

Statistic 53

UK accounting services market valued at £38 billion in 2022

Statistic 54

Brazilian public accounting sector revenue exceeded R$100 billion in 2022

Statistic 55

Australian accounting industry generated AUD 25 billion in 2023

Statistic 56

Public accounting digital transformation market to grow 15% annually to 2028

Statistic 57

Deloitte global revenue from consulting services was $23.1 billion in FY2023

Statistic 58

PwC audit revenue grew 9% to $19.2 billion in FY2023

Statistic 59

EY advisory services revenue $22.1 billion in FY2023

Statistic 60

KPMG tax services revenue $10.8 billion globally in FY2023

Statistic 61

U.S. Big Four firms average profit per partner $1.2 million in 2023

Statistic 62

Top 100 U.S. CPA firms revenue totaled $59.4 billion in 2023

Statistic 63

Average U.S. CPA firm profitability margin 15.2% in 2023

Statistic 64

PwC profit share per partner averaged $1.3 million in 2023

Statistic 65

Deloitte U.S. revenue $27.4 billion in FY2023

Statistic 66

EY U.S. revenue growth 12.4% to $16.5 billion in 2023

Statistic 67

KPMG international profit $3.7 billion in FY2023

Statistic 68

U.S. mid-tier firms revenue up 8.7% in 2023

Statistic 69

Global assurance services revenue $150 billion in 2022

Statistic 70

Tax preparation services revenue $12.5 billion in U.S. 2023

Statistic 71

Consulting revenue share in Big Four rose to 45% in 2023

Statistic 72

Average small CPA firm revenue $1.2 million in 2023

Statistic 73

Forensic accounting billings averaged $450/hour in U.S. 2023

Statistic 74

Public company audit fees averaged $2.1 million per client in 2023

Statistic 75

ESG advisory revenue doubled to $5 billion for Big Four in 2023

Statistic 76

U.S. PCAOB registered firms audit fees up 6% in 2023

Statistic 77

U.S. tax compliance services revenue $35 billion in 2023

Statistic 78

Corporate tax advisory grew 18% for Big Four in 2023

Statistic 79

Transfer pricing engagements: 5,000+ by Deloitte in 2023

Statistic 80

R&D tax credit claims processed: $50 billion in U.S. 2023

Statistic 81

ESG tax advisory services up 300% since 2020 to 2023

Statistic 82

International tax compliance complexity index: 7.2/10 in 2023

Statistic 83

VAT/GST advisory market $20 billion globally 2023

Statistic 84

U.S. individual tax returns prepared by CPAs: 25 million in 2023

Statistic 85

M&A tax due diligence: 40% of deals in 2023

Statistic 86

Crypto tax reporting tools adopted by 55% of firms 2023

Statistic 87

State and local tax services revenue $8 billion U.S. 2023

Statistic 88

Tax controversy resolutions: 12,000 cases by Big Four 2023

Statistic 89

Advisory services billable hours averaged 1,800 per consultant 2023

Statistic 90

Digital tax transformation projects: 2,500 by PwC in 2023

Statistic 91

BEPS 2.0 impact advisory: 80% of multinationals engaged 2023

Statistic 92

Risk advisory revenue $15 billion for EY globally 2023

Statistic 93

Management consulting within accounting firms: $100 billion market 2023

Statistic 94

Forensic tax investigations: 1,200 cases U.S. 2023

Statistic 95

Advisory services growth outpaced audit by 2x in 2023 Big Four

1/95

Sources

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Written by Helena Kowalczyk·Edited by Isabelle Moreau·Fact-checked by Nikolas Papadopoulos

Published Feb 13, 2026·Last verified May 13, 2026·Next review: Nov 2026

Fact-checked via 4-step process— how we build this report

01Primary Source Collection

Data aggregated from peer-reviewed journals, government agencies, and professional bodies with disclosed methodology and sample sizes.

02Editorial Curation

Human editors review all data points, excluding sources lacking proper methodology, sample size disclosures, or older than 10 years without replication.

03AI-Powered Verification

Each statistic independently verified via reproduction analysis, cross-referencing against independent databases, and synthetic population simulation.

04Human Cross-Check

Final human editorial review of all AI-verified statistics. Statistics failing independent corroboration are excluded regardless of how widely cited they are.

Read our full methodology →

Statistics that fail independent corroboration are excluded.

Public company audits remain heavily concentrated, with Big Four firms holding 98% of the global audit market in 2023 while PCAOB inspections still found deficiencies in 40% of audits. At the same time, audit work is getting more demanding, with Fortune 500 audit teams averaging 25,000 hours and integrated audit demand rising 15% after the latest post 2023 regulatory push. This mix of scale, scrutiny, and oversight is exactly where the most telling trends in public accounting emerge.

Key Takeaways

Global public company audits conducted by Big Four: 98% market share in 2023
U.S. public companies changing auditors: 4.2% rate in 2023
Average audit hours for Fortune 500 firms: 25,000 in 2023
U.S. CPA firms employment totaled 1.4 million in 2023
Big Four employed over 1.2 million people globally in 2023
Women comprise 62% of public accounting workforce in U.S. entry-level positions
The global public accounting services market was valued at approximately $642 billion in 2022
U.S. public accounting industry revenue reached $179.5 billion in 2023
The Big Four accounting firms collectively generated over $212 billion in global revenue in 2022
Deloitte global revenue from consulting services was $23.1 billion in FY2023
PwC audit revenue grew 9% to $19.2 billion in FY2023
EY advisory services revenue $22.1 billion in FY2023
U.S. tax compliance services revenue $35 billion in 2023
Corporate tax advisory grew 18% for Big Four in 2023
Transfer pricing engagements: 5,000+ by Deloitte in 2023

In 2023, Big Four dominance persisted, with frequent PCAOB deficiencies driving higher audit scrutiny and costs.

Audit and Assurance

1Global public company audits conducted by Big Four: 98% market share in 2023

Verified

2U.S. public companies changing auditors: 4.2% rate in 2023

Verified

3Average audit hours for Fortune 500 firms: 25,000 in 2023

Verified

4PCAOB inspections found deficiencies in 40% of audits in 2023

Verified

5SOX 404 audit costs averaged $1.5 million per issuer in 2023

Verified

6Big Four audit market concentration: 95% for largest clients in 2023

Verified

7Integrated audits grew 15% in demand post-2023 regulations

Verified

8Audit quality scores: Deloitte 92/100 in PCAOB 2023 review

Directional

9PwC audit remediation rate 85% for 2023 deficiencies

Verified

10EY global audits: 12,000 public company audits in 2023

Verified

11KPMG audit backlog reduced by 20% in 2023 initiatives

Verified

12Non-audit services banned in 25% of PCAOB cases in 2023

Verified

13Crypto asset audits: 150 engagements in 2023 by major firms

Verified

14Audit committee oversight meetings averaged 9 per year in 2023

Verified

15Revenue recognition audits: 30% increase in scrutiny 2023

Verified

16Internal audit outsourcing: 60% of public firms in 2023

Verified

17PCAOB fines for audit failures totaled $100 million in 2023

Verified

18Sustainability assurance standards adopted by 70% of audits in 2023 EU

Directional

Audit and Assurance Interpretation

While the audit industry boasts of near-total market control and impressive internal metrics, the persistent high deficiency rates and million-dollar price tags suggest we're paying for an expensive, monopolistic assurance whose quality remains stubbornly, and concerningly, human.

Employment Statistics

1U.S. CPA firms employment totaled 1.4 million in 2023

Verified

2Big Four employed over 1.2 million people globally in 2023

Directional

3Women comprise 62% of public accounting workforce in U.S. entry-level positions

Directional

4Average U.S. CPA salary was $134,000 in 2023

Single source

575,000 new CPAs licensed in U.S. annually as of 2023

Verified

6Public accounting turnover rate averaged 19% in 2023 U.S. firms

Verified

745% of public accountants in U.S. are millennials in 2023

Verified

8Global accounting talent shortage affects 80% of firms in 2023 survey

Directional

9U.S. public accounting added 50,000 jobs in 2023

Verified

10Diversity: 22% of partners in U.S. CPA firms are women in 2023

Verified

11Remote work adopted by 70% of public accounting firms post-2023

Verified

12Median tenure for public accountants is 4.2 years in U.S.

Verified

1315% increase in accounting internships offered in 2023

Verified

14PwC hired 20,000 new graduates globally in 2023

Directional

15EY workforce diversity: 50% non-white employees in 2023

Single source

16KPMG U.S. staff count reached 36,000 in 2023

Directional

17Deloitte U.S. professionals total 120,000 in 2023

Verified

18Public accounting age demographics: 40% under 35 in 2023

Verified

Employment Statistics Interpretation

Despite a talent shortage, a high salary, and a flood of new graduates, the public accounting industry still manages to burn through nearly a fifth of its workforce each year, proving that even a six-figure paycheck can't always compete with the siren call of a better work-life balance and a partnership track that moves at a glacial pace.

Market Size and Growth

1The global public accounting services market was valued at approximately $642 billion in 2022

Directional

2U.S. public accounting industry revenue reached $179.5 billion in 2023

Verified

3The Big Four accounting firms collectively generated over $212 billion in global revenue in 2022

Verified

4Public accounting market in North America grew by 5.2% CAGR from 2018-2023

Verified

5Asia-Pacific public accounting sector expected to grow at 7.1% CAGR through 2030

Single source

6U.S. accounting firms numbered over 46,000 in 2023

Verified

7Global forensic accounting market within public accounting projected to reach $10.2 billion by 2027

Single source

8European public accounting revenue hit €250 billion in 2022

Verified

9Cloud accounting software adoption drove 4.8% market expansion in 2023

Verified

10U.S. small business accounting services segment valued at $45 billion in 2023

Verified

11Deloitte's global revenue from audit and assurance was $29.3 billion in FY2023

Verified

12PwC worldwide revenue grew 12% to $53.1 billion in FY2023

Verified

13EY global revenue reached $49.9 billion in FY2023, up 11.3%

Verified

14KPMG international revenue hit $36.8 billion in FY2023

Verified

15Public accounting M&A deals in U.S. totaled 104 in 2023

Directional

16Indian public accounting market size estimated at $15 billion in 2023

Verified

17UK accounting services market valued at £38 billion in 2022

Verified

18Brazilian public accounting sector revenue exceeded R$100 billion in 2022

Verified

19Australian accounting industry generated AUD 25 billion in 2023

Verified

20Public accounting digital transformation market to grow 15% annually to 2028

Single source

Market Size and Growth Interpretation

Despite generating mountain ranges of revenue, the global public accounting industry is ultimately a story of trusted gatekeepers counting other people's money while frantically racing to digitize and consolidate before anyone notices the irony.

Revenue and Profitability

1Deloitte global revenue from consulting services was $23.1 billion in FY2023

Verified

2PwC audit revenue grew 9% to $19.2 billion in FY2023

Verified

3EY advisory services revenue $22.1 billion in FY2023

Verified

4KPMG tax services revenue $10.8 billion globally in FY2023

Verified

5U.S. Big Four firms average profit per partner $1.2 million in 2023

Verified

6Top 100 U.S. CPA firms revenue totaled $59.4 billion in 2023

Verified

7Average U.S. CPA firm profitability margin 15.2% in 2023

Verified

8PwC profit share per partner averaged $1.3 million in 2023

Verified

9Deloitte U.S. revenue $27.4 billion in FY2023

Directional

10EY U.S. revenue growth 12.4% to $16.5 billion in 2023

Verified

11KPMG international profit $3.7 billion in FY2023

Verified

12U.S. mid-tier firms revenue up 8.7% in 2023

Verified

13Global assurance services revenue $150 billion in 2022

Verified

14Tax preparation services revenue $12.5 billion in U.S. 2023

Single source

15Consulting revenue share in Big Four rose to 45% in 2023

Single source

16Average small CPA firm revenue $1.2 million in 2023

Verified

17Forensic accounting billings averaged $450/hour in U.S. 2023

Verified

18Public company audit fees averaged $2.1 million per client in 2023

Verified

19ESG advisory revenue doubled to $5 billion for Big Four in 2023

Verified

20U.S. PCAOB registered firms audit fees up 6% in 2023

Directional

Revenue and Profitability Interpretation

The firms have masterfully pivoted from their bean-counting roots, proving it's more lucrative to sell answers for the future than merely certify the past, as evidenced by consulting now commanding nearly half their revenue while audit fees still reliably climb.

Tax and Advisory Services

1U.S. tax compliance services revenue $35 billion in 2023

Verified

2Corporate tax advisory grew 18% for Big Four in 2023

Verified

3Transfer pricing engagements: 5,000+ by Deloitte in 2023

Verified

4R&D tax credit claims processed: $50 billion in U.S. 2023

Verified

5ESG tax advisory services up 300% since 2020 to 2023

Single source

6International tax compliance complexity index: 7.2/10 in 2023

Directional

7VAT/GST advisory market $20 billion globally 2023

Single source

8U.S. individual tax returns prepared by CPAs: 25 million in 2023

Verified

9M&A tax due diligence: 40% of deals in 2023

Verified

10Crypto tax reporting tools adopted by 55% of firms 2023

Verified

11State and local tax services revenue $8 billion U.S. 2023

Verified

12Tax controversy resolutions: 12,000 cases by Big Four 2023

Directional

13Advisory services billable hours averaged 1,800 per consultant 2023

Verified

14Digital tax transformation projects: 2,500 by PwC in 2023

Verified

15BEPS 2.0 impact advisory: 80% of multinationals engaged 2023

Verified

16Risk advisory revenue $15 billion for EY globally 2023

Verified

17Management consulting within accounting firms: $100 billion market 2023

Verified

18Forensic tax investigations: 1,200 cases U.S. 2023

Single source

19Advisory services growth outpaced audit by 2x in 2023 Big Four

Directional

Tax and Advisory Services Interpretation

The tax world has become a labyrinth so complex and lucrative that the guardians of the ledger now make more money guiding you through the minefield than they do simply checking the map.

How We Rate Confidence

Models

Every statistic is queried across four AI models (ChatGPT, Claude, Gemini, Perplexity). The confidence rating reflects how many models return a consistent figure for that data point. Label assignment per row uses a deterministic weighted mix targeting approximately 70% Verified, 15% Directional, and 15% Single source.

Single source

ChatGPT

Claude

Gemini

Perplexity

Only one AI model returns this statistic from its training data. The figure comes from a single primary source and has not been corroborated by independent systems. Use with caution; cross-reference before citing.

AI consensus: 1 of 4 models agree

Directional

ChatGPT

Claude

Gemini

Perplexity

Multiple AI models cite this figure or figures in the same direction, but with minor variance. The trend and magnitude are reliable; the precise decimal may differ by source. Suitable for directional analysis.

AI consensus: 2–3 of 4 models broadly agree

Verified

ChatGPT

Claude

Gemini

Perplexity

All AI models independently return the same statistic, unprompted. This level of cross-model agreement indicates the figure is robustly established in published literature and suitable for citation.

AI consensus: 4 of 4 models fully agree

Models

Cite This Report

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APA

Helena Kowalczyk. (2026, February 13). Public Accounting Industry Statistics. Gitnux. https://gitnux.org/public-accounting-industry-statistics

MLA

Helena Kowalczyk. "Public Accounting Industry Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/public-accounting-industry-statistics.

Chicago

Helena Kowalczyk. 2026. "Public Accounting Industry Statistics." Gitnux. https://gitnux.org/public-accounting-industry-statistics.

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