Accountants typically pay $800 - $2,500/yr for $1M coverage

E&O Insurance Cost for Accountants and CPAs (2026)

Accountants face unique professional liability exposure. Tax preparation errors, audit oversights, and financial statement mistakes can result in significant client losses and regulatory consequences. Here is what E&O coverage costs by practice type.

Cost by Practice Type

Practice Area	Annual Cost	Risk Level
Tax Preparation Higher risk during filing season; missed deadlines are common claims	$700 - $1,800	Moderate
Audit / Assurance Financial statement errors can trigger securities litigation	$1,200 - $3,500	High
Advisory / Consulting Business advice claims similar to management consulting exposure	$800 - $2,200	Moderate
Bookkeeping Lower claim severity but payroll and cash management errors still occur	$500 - $1,200	Lower
Forensic Accounting Expert witness testimony and litigation support create high exposure	$1,500 - $4,000	High

CPA-Specific Requirements

AICPA Professional Standards

While the AICPA does not mandate E&O coverage, their professional liability program through CNA is the most widely used CPA E&O policy in the US. CPAs who participate in peer review programs and maintain good standing often receive premium discounts of 5-10%. The AICPA Professional Liability Insurance Program covers over 80,000 CPA firms nationwide.

State Board Recommendations

Several state boards of accountancy recommend or require E&O coverage for CPAs performing attest services (audits, reviews, compilations). Even in states without mandates, most state CPA societies offer discounted group E&O programs. These group programs typically save 10-20% compared to individual market rates and often include risk management training credits.

Client Expectations

Business clients increasingly request proof of E&O coverage before engaging accounting firms. This is especially true for audit clients, where the engagement letter typically requires disclosure of your professional liability coverage. Banks and financial institutions almost universally require their auditors to carry $1M+ in E&O coverage.

Common CPA E&O Claims

40%

Tax Preparation Errors

Incorrect returns, missed deductions, late filings, failure to apply current tax law changes

25%

Financial Statement Mistakes

Material misstatements, failure to detect fraud, inadequate disclosures in audited financials

15%

Data Breaches

Client data exposure, unauthorized access to financial records, HIPAA-adjacent violations

20%

Advisory Disputes

Business valuation errors, transaction advice failures, estate planning miscalculations

How to Reduce CPA E&O Premiums

✓Participate in your state CPA society group E&O program (10-20% savings vs individual market)
✓Complete peer review requirements and maintain good standing with your state board
✓Use standardized engagement letters with clear scope definitions for every client
✓Implement a quality control system per SQCS standards for your practice
✓Maintain continuing education credits, especially in emerging risk areas like cybersecurity
✓Consider the AICPA Professional Liability Insurance Program through CNA for competitive group rates

FAQ

How much does E&O insurance cost for a solo CPA?

A solo CPA with a tax preparation practice and revenue under $200,000 typically pays $800 to $1,500 per year for a $1M/$1M claims-made policy. CPAs who perform audits or forensic accounting pay more due to higher claim severity. Practice area is the biggest cost driver after revenue, so a bookkeeper may pay 40% less than an auditor with the same revenue.

Does the AICPA require E&O insurance?

The AICPA does not mandate E&O insurance, but their professional standards strongly recommend it. Many state CPA societies offer group E&O programs at discounted rates. Some state boards require E&O coverage for CPAs performing certain services, particularly audits and attest engagements. Even without a mandate, most client engagement letters reference your E&O coverage.

What are the most common CPA E&O claims?

Tax preparation errors account for approximately 40% of CPA E&O claims, including incorrect returns, missed deductions, and late filings. Financial statement errors represent about 25% of claims. Client data breaches and confidentiality violations are growing rapidly, now accounting for 15% of claims. Advisory and consulting disputes make up the remaining 20%, often involving business valuation or transaction advice.

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