Professional liability insurance - also called Errors and Omissions (E&O) - covers claims that your professional advice, services, or work product caused a client financial harm due to a mistake, oversight, or failure to perform. General liability covers physical injury and property damage; professional liability covers financial losses from your professional work. If a client sues you for a missed deadline, an error in your deliverable, or advice that cost them money, this is the policy that responds.
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Who needs professional liability?
Any business that provides advice, designs, plans, consulting, or professional services to clients needs professional liability coverage. This includes accountants, architects, engineers, IT consultants, real estate agents, insurance agents, marketing agencies, financial advisors, attorneys, healthcare practitioners, and technology companies. Many client contracts require proof of E&O coverage before you can start work - especially in government contracting, healthcare, and financial services. Professional licensing boards for certain professions may also require or strongly recommend it. Even if it's not legally required, one dissatisfied client alleging your work cost them money can generate $50,000–$150,000+ in legal defense costs alone, regardless of whether the claim has merit. In our experience, professional services firms that skip E&O are betting their business on never making a mistake and never facing a disgruntled client - that's not a sustainable strategy. We shop top-rated commercial carriers to match E&O coverage to your specific profession and risk profile.
What does professional liability cover?
- Claims alleging errors or mistakes in your professional work product
- Claims of negligence in performing professional services
- Failure to deliver services as promised or contracted
- Missed deadlines that cause a client financial loss
- Unintentional breach of contract related to professional services
- Legal defense costs - even if the claim is frivolous, defense costs are covered
- Settlements and judgments up to policy limits
- Regulatory proceedings and disciplinary hearings (varies by policy)
What professional liability does NOT cover
- Bodily injury or physical property damage - that's covered by general liability
- Intentional wrongdoing, fraud, or criminal acts
- Claims arising from services performed before the policy's retroactive date
- Employment-related claims (discrimination, wrongful termination) - that's EPLI
- Known claims or circumstances you were aware of before buying the policy
- Contractual guarantees of results or outcomes (e.g., guaranteeing a specific ROI)
- Personal injury claims - libel, slander outside professional services context
What does professional liability cost?
Professional liability insurance typically costs $500 to $3,000 per year, though some high-risk professions like architects, engineers, and medical practitioners pay more. Annual revenue is the primary rating factor - a solo consultant with $150,000 in revenue might pay $500–$800, while a 10-person firm with $1.5 million in revenue could pay $2,000–$5,000. Your profession, claims history, years in business, and the retroactive date on the policy all factor in. Claims-made policies (the standard form for E&O) require continuous coverage to maintain protection for past work. We shop top-rated carriers and make sure your retroactive date covers all the work you've done, not just current projects.
Frequently asked questions
General liability covers bodily injury and property damage - a client slips in your office, or you damage someone's property. Professional liability covers financial losses from your professional work - an error in your design, bad advice, or missed deadline that costs a client money. They cover different types of claims and most businesses that provide professional services need both.
Professional liability policies are almost always written on a claims-made basis, meaning the policy that's in force when the claim is filed is the one that responds - not the policy that was in force when the work was done. This means you need continuous, uninterrupted coverage. If you let your E&O lapse and a client files a claim about work you did two years ago, you'd have no coverage. When switching carriers, make sure the new policy's retroactive date matches your original inception date.
Yes, especially if your work involves advice, designs, or deliverables that a client relies on to make business decisions. A sole proprietor has no corporate shield - a professional liability claim could reach your personal assets. The cost for a solo professional is often $500–$1,000 per year, which is far less than a single demand letter from a client's attorney would cost to defend.
Only if the policy's retroactive date extends back to when the work was performed. The retroactive date is the earliest date for which the policy will cover claims. If your retroactive date is January 2024 and a client sues over work you did in 2023, the claim would not be covered. When we write a new E&O policy, we work to set the retroactive date as far back as possible - ideally to the date you first started offering professional services.
Accountants and CPAs, architects and engineers, IT consultants and managed service providers, attorneys, real estate agents and brokers, insurance agents, financial advisors, marketing and advertising agencies, healthcare practitioners, and construction design professionals. If clients pay you for your expertise, judgment, or professional opinion rather than physical labor, you likely need E&O coverage. Many of these professions also have client contract requirements or licensing board expectations for coverage.
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Related coverage to consider
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Reviewed by
Sheilia Royal, Agency Principal / Licensed Agent
Licensed in KY, IN & TN | 20 years experience | Last reviewed: March 2026