Is E&O on a claims-made or occurrence basis?

CPA professional liability E&O policies are almost always written on a claims-made basis — meaning the policy in effect when the claim is filed must cover the time period of the alleged error (the retroactive date). This means you need continuous coverage without gaps, and you need to arrange 'tail coverage' (extended reporting period endorsement) if you ever cancel or change insurers, to cover claims that arise from past work after your policy lapses. This is one of the most important coverage concepts for CPAs managing their E&O program.

What cyber liability exposures do CPAs face?

CPAs face some of the highest cyber liability exposure of any professional: tax returns contain SSNs, EINs, account numbers, and detailed financial information. State data breach notification laws require prompt client notification of breaches. IRS e-file providers have specific cybersecurity requirements (IRS Publication 4557) that CPAs must meet. A breach can trigger client lawsuits for failure to safeguard data, state regulatory action, and IRS e-file suspension. Cyber liability coverage pays for forensic investigation, breach notification, client credit monitoring, and defense of breach-related lawsuits.

Do I need insurance if I only prepare taxes for friends and family?

If you are paid for tax preparation — even for friends and family — you are operating a professional service business with professional liability exposure. The fact that the client is known to you does not reduce the legal claim if an error occurs. Additionally, if you hold a CPA license, preparing paid returns without E&O coverage may conflict with AICPA professional standards regarding client care obligations. The cost of E&O for a very small practice ($80–$100/month) is minimal relative to the potential claim from even a single error.

What errors trigger the most CPA E&O claims?

The most common CPA E&O claim triggers are: missed filing deadlines (returns or extensions not filed on time, triggering penalties), mathematical errors in tax calculations (less common with modern software but still occur in complex returns), failure to advise clients of a material tax savings opportunity (omissions claims), errors in financial statements used for lending or investment decisions, and audit failures (failure to detect fraud or material misstatements). Claims involving failed audits and financial statement errors tend to be the highest-severity claims for accounting firms.

Is E&O on a claims-made or occurrence basis?

CPA professional liability E&O policies are almost always written on a claims-made basis — meaning the policy in effect when the claim is filed must cover the time period of the alleged error (the retroactive date). This means you need continuous coverage without gaps, and you need to arrange 'tail coverage' (extended reporting period endorsement) if you ever cancel or change insurers, to cover claims that arise from past work after your policy lapses. This is one of the most important coverage concepts for CPAs managing their E&O program.

What cyber liability exposures do CPAs face?

CPAs face some of the highest cyber liability exposure of any professional: tax returns contain SSNs, EINs, account numbers, and detailed financial information. State data breach notification laws require prompt client notification of breaches. IRS e-file providers have specific cybersecurity requirements (IRS Publication 4557) that CPAs must meet. A breach can trigger client lawsuits for failure to safeguard data, state regulatory action, and IRS e-file suspension. Cyber liability coverage pays for forensic investigation, breach notification, client credit monitoring, and defense of breach-related lawsuits.

Do I need insurance if I only prepare taxes for friends and family?

If you are paid for tax preparation — even for friends and family — you are operating a professional service business with professional liability exposure. The fact that the client is known to you does not reduce the legal claim if an error occurs. Additionally, if you hold a CPA license, preparing paid returns without E&O coverage may conflict with AICPA professional standards regarding client care obligations. The cost of E&O for a very small practice ($80–$100/month) is minimal relative to the potential claim from even a single error.

What errors trigger the most CPA E&O claims?

The most common CPA E&O claim triggers are: missed filing deadlines (returns or extensions not filed on time, triggering penalties), mathematical errors in tax calculations (less common with modern software but still occur in complex returns), failure to advise clients of a material tax savings opportunity (omissions claims), errors in financial statements used for lending or investment decisions, and audit failures (failure to detect fraud or material misstatements). Claims involving failed audits and financial statement errors tend to be the highest-severity claims for accounting firms.

Professional Services

Business Insurance for Accountants & CPAs

A missed tax deadline, an audit failure, or an IRS penalty your client blames on your advice can trigger a claim worth multiples of your annual fee. CPA insurance is not optional.

$80–$250/ monthSolo CPAs (individual practice): $80–$130/month for E&O + GL. Adding cyber liability: $130–$200/month. Small CPA firms (2–5 CPAs): $200–$400/month. Larger firms with complex client portfolios (public companies, investment funds): $400–$1,500/month depending on revenue and client risk profile.

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Coverage Types for Accountants & CPAs

These are the key insurance policies most relevant to your business type — ranked by importance.

📋

Professional Liability (E&O)

Required

The most critical coverage for CPAs and accountants. Covers claims arising from professional errors, missed deadlines, tax preparation mistakes, incorrect financial statements, audit errors, and advice that results in financial loss. The AICPA and most state CPA licensing boards strongly recommend or require E&O for licensed CPAs.

🛡️

General Liability

Required

Covers premises liability (client injured in your office), incidental property damage, and advertising injury. Required for any accountant with a physical office location or client-facing operations. Often bundled with E&O in a professional liability package.

🔒

Cyber Liability

Highly Recommended

CPAs and accountants handle the most sensitive personal and business financial data of any professional service provider — SSNs, EINs, bank accounts, tax returns. A data breach triggers state notification requirements, AICPA ethics obligations, and significant client harm. Cyber liability covers breach response, notification costs, and client claims.

💼

Business Property

Recommended

Covers office equipment, computer systems, accounting software infrastructure, and physical files. Business property is particularly important for sole practitioners who own their office equipment outright and could not operate without it.

⏸️

Business Interruption

Recommended

Tax season is income-critical for accounting firms — a system failure, office fire, or disaster during January–April can cost tens of thousands in lost revenue. Business interruption coverage replaces income lost during a covered property event.

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What You Need to Know

→Professional liability (E&O) is the most important coverage for accountants — it is the only coverage that addresses your core professional risk (errors in your work product).
→The statute of limitations for CPA malpractice claims is typically 3–6 years — E&O policies are usually written on a 'claims-made' basis, meaning coverage must be active when the claim is filed, not just when the alleged error occurred.
→Many state CPA licensing boards and the AICPA Code of Professional Conduct reference professional liability insurance as a best practice — some states require disclosure to clients if you don't carry E&O.
→Cyber liability is increasingly critical: CPAs who file e-returns handle taxpayer PINs, account numbers, and SSNs — a breach triggers IRS e-file provider requirements in addition to state breach notification laws.
→CPAs who provide investment advice may need additional FINRA/SEC-related E&O coverage — standard CPA E&O may not cover investment advisory services.

What Does It Cost?

$80–$250per month

Solo CPAs (individual practice): $80–$130/month for E&O + GL. Adding cyber liability: $130–$200/month. Small CPA firms (2–5 CPAs): $200–$400/month. Larger firms with complex client portfolios (public companies, investment funds): $400–$1,500/month depending on revenue and client risk profile.

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Frequently Asked Questions

Yes — professional liability E&O covers claims from clients who suffered financial loss due to your professional error, including IRS penalties and interest that resulted from a mistake you made in preparing their return. The claim must allege a professional error (something below the standard of care expected of a competent CPA) — not just a difference of opinion on tax strategy. Your E&O insurer will investigate whether the penalty was caused by your error or by information the client failed to provide.

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