Accountants handle financial information that can have a major impact on their clients. Whether they prepare tax returns, provide bookkeeping services, perform audits, or offer financial advice, clients depend on accountants to perform their work accurately and professionally.

But mistakes can happen.

An incorrect calculation, a missed deadline, an inaccurate financial statement, or an overlooked detail could result in a client claiming financial damages. Even if an accountant believes the allegation is unfounded, defending a professional liability claim can be expensive.

This is where an accountant’s professional liability insurance can be important.

Also known as errors and omissions (E&O) insurance, accountants’ professional liability insurance is designed to address certain claims arising from professional accounting services.

This guide explains how professional liability insurance works for accountants in the United States, what it may cover, what it generally does not cover, how much it can cost, and what accountants should consider when selecting a policy.

What Is Accountants Professional Liability Insurance?

Accountants’ professional liability insurance is a form of E&O coverage designed for professionals who provide accounting-related services.

Depending on the policy, coverage may address certain allegations involving:

• Professional errors
• Professional omissions
• Negligence
• Failure to provide professional services
• Incorrect professional advice
• Certain financial losses suffered by clients

For example, a client could claim that an accountant made an error in preparing financial information and that the mistake caused financial damage.

If the claim is covered, the insurance policy may help with defense costs and potentially covered settlements or judgments, subject to policy limits and exclusions.

The exact protection varies between insurance policies.

Why Do Accountants Need Professional Liability Insurance?

Accounting work involves substantial responsibility.

Clients may rely on accountants for:

• Tax preparation
• Bookkeeping
• Financial statements
• Payroll services
• Tax planning
• Business consulting
• Accounting systems
• Auditing
• Financial reporting

A mistake can potentially have significant consequences.

For example, an accountant misses a tax filing deadline, and the client claims that the mistake resulted in penalties and financial losses.

The client may demand compensation.

Even if the accountant disputes responsibility, responding to the claim could require professional legal assistance.

Professional liability insurance may provide a defense for covered claims.

What Does Accountants E&O Insurance Cover?

Coverage depends on the policy, but several types of professional allegations may be relevant.

1. Accounting Errors

An accountant may make an accidental error while performing professional services.

For example, an accountant enters incorrect information into a financial report.

The client claims the error caused financial losses.

If covered, an E&O policy may respond to the claim.

2. Omissions

An omission occurs when an accountant allegedly fails to include something that should have been included.

For example, an accountant may overlook an important item while preparing financial information for a client.

The client later alleges that the omission caused financial harm.

Professional liability coverage may potentially address a covered claim.

3. Professional Negligence

A client could allege that an accountant failed to provide services with the appropriate level of professional care.

Examples might include allegations involving:

• Incorrect accounting work
• Inadequate review
• Failure to identify an issue
• Incorrect professional recommendations

Whether a claim is covered depends on the policy and circumstances.

4. Certain Financial Loss Claims

Accounting clients may suffer financial losses that they believe were caused by professional services.

This can make E&O insurance particularly relevant to accounting practices.

Unlike general liability claims, these disputes may not involve physical injury or property damage.

Examples of Accountant Professional Liability Claims

Scenario	Potential Allegation
Tax return error	Client claims financial loss.
Missed deadline	Client alleges penalties resulted.
Incorrect financial statement	Client claims business losses.
Bookkeeping error	Client alleges inaccurate records caused damage.
Incorrect tax advice	Client claims advice resulted in financial consequences.
Payroll mistake	Client alleges professional error caused losses.

These are examples only. Insurance coverage depends on the actual policy.

Does Accountants Professional Liability Cover Tax Errors?

It may cover certain claims arising from alleged professional errors in tax services, depending on the policy.

For example, a client may allege that an accountant made an error while preparing a tax return and that the error caused financial harm.

However, not every tax-related dispute is necessarily covered.

Accountants should carefully review:

• Tax service coverage
• Exclusions
• Defense provisions
• Policy limits
• Regulatory exclusions
• Fraud provisions

The exact policy language determines coverage.

Does E&O Insurance Cover CPA Services?

Professional liability insurance can be particularly relevant to Certified Public Accountants and accounting firms.

However, CPA practices may provide a wide variety of services.

These can include:

• Tax preparation
• Auditing
• Attestation
• Bookkeeping
• Advisory services
• Consulting
• Financial reporting

Accountants should make sure their insurer knows which services they actually provide.

Specialized services can create different insurance requirements.

What Does Accountants Professional Liability Insurance Not Cover?

Professional liability insurance is not designed to cover every possible risk faced by an accounting practice.

Depending on the policy, exclusions may apply to:

• Intentional wrongdoing
• Fraud
• Criminal acts
• Certain contractual liabilities
• Bodily injury
• Property damage
• Employment-related claims
• Certain cyber incidents
• Certain disputes involving unauthorized services

Accountants should review their policy exclusions carefully.

Professional Liability vs. General Liability for Accountants

An accounting firm may need both professional and general liability insurance.

The policies address different risks.

Professional Liability	General Liability
Professional errors	Certain bodily injury claims
Professional omissions	Certain property damage claims
Professional negligence	Certain premises liability
Certain client financial losses	Certain personal and advertising injury
Accounting service claims	General business operations

Example

A client claims that an accountant made an error that caused financial losses.

Professional liability may be relevant.

A client visits the accounting office and slips and falls.

General liability may be relevant.

The two policies are not interchangeable.

Cyber Liability for Accounting Firms

Cybersecurity is another major consideration for modern accounting practices.

Accountants frequently handle confidential information, potentially including:

• Tax records
• Bank information
• Social Security numbers
• Business financial records
• Payroll information
• Employee information
• Client identification documents

A cyberattack or data breach could create high costs.

Cyber liability insurance may address certain cyber-related risks, depending on the policy.

Professional liability and cyber liability are different forms of insurance, although some policies may combine certain coverages.

Accounting firms should evaluate both exposures.

How Much Does an Accountant’s Professional Liability Insurance Cost?

There is no universal premium.

The cost can vary depending on the accounting practice.

Insurers may consider:

• Annual revenue
• Number of employees
• Services provided
• Claims history
• Location
• Coverage limits
• Client industries
• Size of the practice

Factors That Can Affect Cost

Factor	Potential Impact
Higher revenue	May increase exposure
Larger staff	May increase underwriting exposure
Tax services	May affect risk assessment
Audit/attestation work	May involve specialized exposure
Claims history	May affect premiums
Higher limits	May increase premium
Complex clients	May affect underwriting

The best way to determine the cost is to request quotes based on accurate business information.

How Much E&O Coverage Does an Accountant Need?

There is no universal coverage limit for every accounting professional.

Common limits may include:

• $500,000
• $1 million
• $2 million
• $5 million or more

The appropriate limit depends on the firm’s circumstances.

Consider:

• Client contract requirements
• Annual revenue
• Client size
• Services provided
• Potential financial loss
• Regulatory requirements
• Number of professionals

A small bookkeeping practice may have different insurance needs from a large CPA firm performing complex engagements.

Claims-Made Coverage for Accountants

Many professional liability policies are written on a claims-made basis.

This means the timing of a claim can affect coverage.

Accountants should understand:

• Retroactive dates
• Prior acts coverage
• Claim reporting requirements
• Policy expiration
• Extended reporting periods

Why the Retroactive Date Matters

A retroactive date can determine how far back covered professional services may extend.

For example, a policy may have a retroactive date of January 1, 2024.

A claim made during the current policy period involving services performed before that date may not be covered, depending on the policy.

This is particularly important when switching insurance carriers.

What Is Prior Acts Coverage?

Prior acts coverage can protect against certain claims involving professional services performed before the current policy period.

For an established accounting firm, this can be particularly important.

Before switching insurers, accountants should compare the prior acts provisions of both policies.

Maintaining continuous professional liability coverage can help reduce the risk of unexpected gaps.

Extended Reporting Period for Accountants

An extended reporting period, sometimes called tail coverage, can allow certain claims to be reported after a claims-made policy ends.

This may become relevant if an accountant:

• Retires
• Closes the practice
• Sells the business
• Changes insurance providers

The exact terms vary by policy.

Accountants should discuss extended reporting options with their insurance professional before terminating coverage.

Do Accounting Clients Require E&O Insurance?

Some clients may require professional liability insurance as part of an engagement agreement.

A client contract could require:

• Minimum E&O limits
• Proof of insurance
• A Certificate of Insurance
• Specific insurance provisions
• Particular policy conditions

Large business clients may have more detailed insurance requirements than individual clients.

Always review the contract before agreeing to the engagement.

Certificate of Insurance for Accountants

Clients may ask an accounting firm for a Certificate of Insurance (COI).

A COI generally summarizes information about the firm’s insurance coverage.

It may show:

• Named insured
• Insurance carrier
• Policy number
• Coverage type
• Policy limits
• Effective dates
• Expiration date
• Certificate holder

A certificate is generally not the insurance policy itself.

The actual policy and endorsements determine coverage.

How to Get Professional Liability Insurance for Accountants

Getting E&O insurance usually starts with contacting an insurance agent, broker, or insurer that works with professional service businesses.

Step 1: Describe Your Services

Clearly explain whether you provide:

• Tax preparation
• Bookkeeping
• Payroll
• Auditing
• Accounting
• Consulting
• Advisory services

Step 2: Provide Business Information

You may need to provide:

• Annual revenue
• Number of employees
• Years in business
• Claims history
• Location
• Client industries

Step 3: Determine Required Limits

Check your client contracts and professional requirements.

Step 4: Compare Policies

Do not compare premiums alone.

Review:

• Limits
• Deductibles
• Exclusions
• Retroactive date
• Prior acts
• Defense costs
• Reporting requirements

Step 5: Consider Other Coverage

An accounting firm may also need to evaluate:

• General liability
• Cyber liability
• Workers’ compensation
• Commercial property
• Employment practices liability

The appropriate coverage depends on the firm.

Common Insurance Mistakes Accountants Make

Choosing Coverage Based Only on Price

A cheaper policy may have different limits or exclusions.

Failing to Disclose All Services

If your firm adds consulting, advisory, or other services, notify your insurer.

Ignoring Claims-Made Provisions

Accountants should understand retroactive dates and prior acts coverage.

Allowing Coverage to Lapse

A gap can create problems for claims involving previous professional work.

Assuming General Liability Covers Accounting Errors

General liability generally does not replace professional liability insurance.

Ignoring Cyber Risks

Accounting firms hold valuable client information and should evaluate whether cyber insurance is appropriate.

Accountant Insurance Checklist

Coverage Consideration	Review
Professional liability/E&O	✓
General liability	✓
Cyber liability	✓
Workers’ compensation	✓
Business property	✓
Client contract requirements	✓
Coverage limits	✓
Policy exclusions	✓
Retroactive date	✓
Prior acts coverage	✓
Extended reporting options	✓
Certificate of Insurance	✓

Final Thoughts

Accountants’ professional liability insurance can be an important form of protection for accounting professionals and firms in the United States.

Accountants handle information that can directly affect a client’s finances, taxes, business decisions, and regulatory obligations. An alleged professional error can therefore lead to a substantial financial claim.

Professional liability insurance may help address certain covered allegations involving errors, omissions, negligence, and other issues related to professional services.

However, E&O insurance is not a complete insurance program on its own. Accounting firms may also need to consider general liability, cyber liability, workers’ compensation, business property coverage, and other policies depending on their operations.

Accountants should also pay close attention to claims-made provisions. Retroactive dates, prior acts coverage, reporting requirements, and extended reporting periods can become particularly important when changing insurers or closing a practice.

Before purchasing coverage, accurately describe every professional service your firm provides and review the insurance requirements contained in client agreements.

Because insurance requirements, regulations, and available policies vary across the United States, consider speaking with a licensed insurance agent or broker familiar with accounting professionals and your state.

The right policy should do more than provide a Certificate of Insurance. It should provide coverage that reflects the actual professional risks associated with your accounting practice.