Every business that gives advice, designs something or performs a service for a fee carries a risk that a general liability policy was never built to handle: a client claiming that a mistake, an oversight or bad advice cost them money. Professional liability insurance, usually called errors and omissions (E&O) insurance, exists for exactly that situation. This guide explains what it covers, who needs it and how to avoid the most common buying mistakes.
What professional liability insurance does
According to the Insurance Information Institute (Triple-I), professional liability insurance pays the cost of legal defense against covered claims and the judgments against you, up to the policy limit. Defense matters as much as the indemnity: even a claim with no merit can take months of attorney time to dismiss. The typical allegations are negligence, misrepresentation, inaccurate advice and failure to deliver what was promised, which are financial-loss claims that general liability insurance does not address. General liability responds to bodily injury and property damage; E&O responds to economic harm caused by your professional work.
Who should consider it
Triple-I lists accountants, architects, engineers, graphic designers, IT consultants, insurance professionals, investment advisors, management consultants, real estate agents and brokers, and software developers among the professionals who should consider the coverage. Doctors and lawyers buy specialized versions, and some states require them to carry it; see our guides to medical malpractice insurance and lawyers professional liability. In practice, many businesses buy E&O because a client contract, a government tender or a lender requires a certificate showing a minimum limit.
What a policy usually covers and excludes
A typical E&O policy covers:
- defense costs, including attorneys, experts and court costs;
- settlements and judgments for covered claims;
- claims alleging negligent acts, errors, omissions or misstatements in your professional services;
- in some forms, costs such as licensing board proceedings, as Triple-I notes.
Common exclusions include intentional or dishonest acts and non-financial losses (both cited by Triple-I), bodily injury and property damage (left to general liability), liability you assumed under a contract beyond what the law would impose, fines and penalties, and matters you knew about before the policy began. Read the definition of "professional services" carefully: if it does not describe what you actually do, a claim may fall outside the policy.
Claims-made timing: the part most buyers miss
Most professional liability policies are written on a claims-made basis. Triple-I explains that the policy must be in effect both when the event took place and when the lawsuit is filed for the claim to be paid. Three terms control your protection:
- Retroactive date — work performed before this date is not covered. Keep it unchanged when you renew or switch insurers.
- Extended reporting period ("tail") — extra time to report claims after a policy ends, important when you retire, close or sell the business.
- Prior acts coverage — when moving to a new insurer, ask it to honor your existing retroactive date.
A gap of even a few weeks between policies can leave years of past work uninsured.
Limits, deductibles and what drives price
Policies are written with a per-claim limit and an annual aggregate. Many forms include defense costs within the limit, so a long lawsuit can consume coverage before any settlement is paid. Triple-I reports that deductibles generally range from $1,000 to $25,000. Pricing depends on your profession, revenue, the type and size of client contracts, claims history, the limit you choose and your risk controls, such as written engagement letters, documented scope changes and quality reviews. We do not quote prices here; rates vary by insurer and state.
E&O is not part of a standard business package
Triple-I notes that professional liability coverage is not included in an in-home business policy or a business owners policy (BOP), although it can be added to a commercial package policy as an endorsement. Most professional firms combine a BOP or general liability policy with a separate professional liability policy, and technology firms often add cyber insurance.
How to buy and how to report a claim
- List every service you provide and check that the policy wording covers each one.
- Compare limits with the requirements in your largest client contracts.
- Confirm the retroactive date, the tail options and the consent-to-settle clause.
- Report any claim or demand letter promptly, in writing, before the policy period ends, and do not admit liability or offer refunds without the insurer's agreement.
Rules differ by state and by profession. Policies are issued by licensed insurers and placed through licensed producers in your state. To compare options, request a quote or contact Polis Re.