Posted on: September 15, 2026 by Huntersure
A manufacturing client sends its accounting firm a year of sales figures, and the firm uses them to prepare the company’s tax return. Two years later, an IRS examination finds unreported income, and the client blames the firm for the penalties and interest.
Does the fact that the client supplied the numbers eliminate the firm’s exposure? The answer depends less on who supplied the data than on what the firm agreed to do with it. When a client claims an accounting firm’s work cost them money, accountants professional liability becomes part of the conversation.
Incorrect information from a client does not automatically make an accountant liable for the resulting error. The key question is what the accountant was hired to do and whether the information should have prompted additional scrutiny under the standards governing that engagement.
Consider the same incorrect inventory count used for several services. A bookkeeper engaged to record information supplied by the client has a different responsibility from a tax preparer using that figure to calculate the cost of goods sold. Tax practitioners may generally rely on information supplied by a client in good faith, but federal tax rules require reasonable inquiries when the information appears incorrect, inconsistent, or incomplete.
An audit carries different responsibilities. Auditing standards require professional skepticism and sufficient appropriate evidence to support the auditor’s conclusions. If the inventory figure conflicts with other evidence, simply accepting management’s explanation may not be enough.
A professional liability claim may turn on what the accountant reasonably should have questioned or investigated within the scope of the engagement. The client’s own role can also affect the case. Comparative-fault rules vary by state, and some jurisdictions, such as New York, limit when a client’s negligence can be used as a defense if it did not interfere with the accountant’s work.
Once agents understand the firm’s service mix, the next question is how the firm manages information that appears incomplete, inconsistent, or unsupported.
Engagement letters are one place to start. They can define the scope of the work, identify the responsibilities of the accountant and client, and clarify what information management is expected to provide.
Internal procedures can be just as important. Does the firm document follow-up questions when something does not add up? Who decides when additional support is needed? What happens if a client refuses to provide requested information or insists on using figures the accountant believes are unreliable?
Those practices can give agents a clearer view of how the firm handles potential problems before they turn into allegations. They also help distinguish firms that perform similar services but approach documentation, client communication, and escalation differently.
Who supplied inaccurate data does not, by itself, determine whether a professional liability allegation exists or whether a particular claim is covered. Coverage depends on the allegations, the facts, the policy’s definition of professional services, applicable exclusions and conditions, and the timing requirements of a claims-made policy. The professional services giving rise to the claim generally must fall on or after the applicable retroactive date, while the claim must also satisfy the policy’s requirements for when it is made and reported.
Start by comparing the services the firm performs with the definition of professional services in the policy under consideration. A firm that has added consulting or advisory work since its last application should confirm how the proposed policy treats those services. Service mix, firm size, and revenue can also influence underwriting and the available insurance options.
Claims tied to earlier work may surface after a firm is acquired or dissolves, or when accountants leave to join another firm or retire. A stand-alone prior-acts program may provide an option for addressing those exposures, subject to the policy’s terms and eligibility requirements.
When client-provided information turns out to be wrong, the key question is what the accounting firm was hired to do with that information, not simply where it came from. For agents, evaluating that responsibility requires looking closely at the firm’s services, the professional standards that apply to each one, and the procedures in place when information appears incomplete, inconsistent, or questionable.
Those details can lead to a more informed accountants professional liability review, along with factors such as firm size, practice mix, and prior-acts needs. Contact Huntersure for help evaluating an accountant client’s professional liability coverage.
Huntersure LLC is a full-service Managing General Agency that has provided insurance program administration for professional liability products to our partners across the United States since 2007. We specialize in providing insurance solutions for businesses of all sizes. Our program features can cover small firms (grossing $2.5 million annually) to large corporations (grossing $25 million annually or more). We make doing business with us easy with our breadth and depth of knowledge of E&O insurance, our proprietary underwriting system that allows for responsive quoting, binding, and policy issuance and tailored products to meet the needs of your insureds. Give us a call at (855) 585-6255 to learn more.
Posted in: Accountant Professional Liability
