Professional liability (E&O) insurance explained

Professional liability insurance, also called errors and omissions (E&O), pays defense costs and covered damages when a client or other third party says your professional work was negligent and caused them a financial loss. It is written on a claims-made basis, so the policy that responds is the one in force when the claim is first made and reported, not the one in force when the work was done. It does not replace general liability, which handles bodily injury and property damage.

What the policy actually covers

Most professional liability forms are built around one insuring agreement: the insurer agrees to pay damages the insured becomes legally obligated to pay because of a wrongful act, error or omission in the rendering of, or failure to render, professional services. Three phrases carry the weight.

Wrongful act. Usually negligence: the work fell below the standard of care a reasonable member of your profession would meet. A missed filing deadline, a wrong calculation in a report, a campaign that never launched, a recommendation that turned out badly. Many forms also reach related allegations such as breach of duty or misstatement, and some add defamation or similar torts when they arise from the services.

Professional services. This is a defined term, and it is the part of the form most worth reading. Some policies tie it to a schedule or to the description on the application ("management consulting, marketing strategy and website design"). Work outside that description can be uncovered even if a client would call it part of your job. If you add a service line, tell your broker before the next renewal, not after the claim.

Financial loss. Professional liability responds to economic harm: lost profits, wasted fees, remediation costs. As IRMI's definition notes, most of these policies cover third parties' economic or financial losses rather than bodily injury or property damage, which belong on the general liability policy. The dividing line is covered in E&O vs general liability: what each one covers.

Most forms also include defense costs. Some carriers have a duty to defend; others reimburse defense costs as they are incurred and let the insured choose counsel from a panel. Either way, read whether defense sits inside or outside the limit. See defense costs inside vs outside policy limits: why it matters.

Claims-made: the trigger that drives everything

A claims-made policy covers claims first made against you and reported to the insurer during the policy period (or an extended reporting period), for wrongful acts that happened on or after the policy's retroactive date. Three consequences follow:

• Dropping coverage is dangerous. If you cancel the policy when you retire or close the business, a claim that arrives next year has no policy to land on unless you bought an extended reporting period. That is the subject of tail coverage and extended reporting periods.
• Switching carriers can strip protection. A new policy with a retroactive date of its inception date leaves every earlier job uninsured. Ask for the prior retroactive date to carry over. See prior acts coverage and retroactive dates.
• Late notice can forfeit coverage. A demand letter, a threat to sue or a client's written complaint is often a "claim" under the definition. Report it right away. Many forms also let you report a "circumstance" that might become a claim, which locks it into the current policy.

The general comparison with occurrence forms is in occurrence vs claims-made policies.

What it does not cover

Exclusions vary by carrier and profession, but the usual list includes:

• Bodily injury and property damage. These belong on the general liability policy. The CGL itself does not automatically exclude professional services; per IRMI's analysis of the ISO program, the standard form must be endorsed to do that. Insurers commonly attach ISO endorsements such as CG 22 43 (engineers, architects or surveyors), CG 22 79 (contractors) or CG 22 80 (the limited contractors exclusion for design-build firms), so a gap can open between the two policies.
• Intentional, dishonest or fraudulent acts. Usually the exclusion applies after a final adjudication, and the policy still defends until then. Innocent co-insureds, such as partners who did nothing wrong, are often protected by a severability clause.
• Contractual liability beyond the liability you would have anyway. If you guarantee a result, warrant a completion date or promise a savings figure, the breach of that promise may fall outside the policy.
• Prior knowledge. If you knew about a problem before the policy began, the insurer can decline the resulting claim. The application usually asks you to confirm that you know of none.
• Fee disputes and return of fees. A client demanding its money back is not the same as a damages claim, and many forms carve out fee refunds.
• Employment claims, benefit plan fiduciary duties, cyber events and punitive damages where uninsurable. These sit on other policies: employment practices liability, fiduciary liability and cyber. IT firms that need a blend of technology E&O and cyber should see Technology E&O insurance for software, SaaS and IT firms.

Carriers write their own professional liability forms rather than a single industry-standard one, so exclusions differ and the policy wording, not a summary like this one, controls.

Limits, retentions and the cost drivers

Limits are quoted per claim and in the aggregate, for example $1 million per claim / $2 million aggregate. A self-insured retention or deductible, often applying to defense as well as damages, comes before the insurer pays. What drives the price is a short list: your revenue, the type of work, the size of the projects or clients, whether you use written contracts with limitation-of-liability clauses, loss history, years in practice, and whether you take responsibility for outcomes (a consultant who implements is rated differently from one who only advises). Premium numbers belong in a quote, not a guide; a quote should be tied to the application you sign.

Some carriers sell small professional liability limits as an add-on to a business owner's policy. Travelers, for instance, describes its miscellaneous professional liability coverage as available with a BOP, as an add-on with broader limits, or standalone for more complex exposures. Add-ons suit low-risk advisory work; heavy-exposure firms usually need the standalone form.

Who needs it, and who requires it

Anyone whose product is advice, design, judgment or a service delivered to a client can face a negligence claim. The usual buyers are consultants, accountants, Architect and engineer insurance, marketing agencies, IT firms, real estate and insurance agents, financial advisers, designers, staffing firms and healthcare practices. Physicians and lawyers buy in their own specialty markets.

The requirement usually comes from one of three places:

1. Client contracts. The most common source by far, especially with corporate and government clients.
2. Licensing boards and regulators. Some states set minimums for some professions. Connecticut, for example, requires licensed dentists providing direct patient care to carry professional liability insurance or other indemnity of at least $500,000 per occurrence and $1,500,000 aggregate, according to the Connecticut Department of Public Health. Rules differ by state and by profession, so check your licensing board; the workers' comp and benefits requirements by state covers workers' comp and benefits, not licensing-board mandates.
3. Lenders, landlords and franchisors, which sometimes add it to their insurance schedules.

A contract clause, line by line

Here is a hypothetical but typical consulting-agreement clause:

"Consultant shall maintain professional liability insurance with limits not less than $1,000,000 per claim and $2,000,000 in the aggregate. If written on a claims-made basis, the retroactive date shall precede the effective date of this Agreement, and coverage shall be maintained, or an extended reporting period purchased, for three years after completion of the services."

• $1,000,000 / $2,000,000. A limit you must hold, not necessarily the amount you can be sued for. If your policy has defense inside limits, claims erode the aggregate for the rest of the year.
• Claims-made basis and retroactive date. The client wants your policy to reach back to the start of the work. A retro date after the contract start fails the clause.
• Three years of continuing coverage. If you end the policy early, you breach the contract unless you buy the tail. Price that in. The tail coverage cost calculator shows the arithmetic.

Some clients also ask to be named an additional insured. Professional liability policies seldom allow it, or allow it only by a narrow endorsement; raise the point early. The difference between the two issues is explained in additional insured endorsements explained.

A hypothetical claim, start to finish

Say a six-person marketing consultancy has a $1 million per claim / $1 million aggregate policy with a $10,000 retention, defense inside limits, and a retroactive date matching its first day in business. In March, a retailer client sends a letter alleging the consultancy's missed launch date cost it $400,000 in lost holiday sales. The consultancy reports the letter that week.

Defense counsel is appointed and the case settles after mediation. Defense costs reach $120,000 and the settlement is $250,000. The insurer pays $360,000 after the $10,000 retention, and the remaining aggregate limit for that policy year drops to $640,000. On a policy with defense outside the limit, only the $240,000 of settlement net of the retention would have reduced the limit. And if the consultancy had cancelled its policy in February without buying a tail, the March letter would have found no policy to respond.

Buying checklist

1. Match the policy's definition of professional services to what you actually do, including new service lines.
2. Confirm the retroactive date, and ask for full prior acts if you are switching carriers.
3. Check whether defense costs reduce the limit and whether the retention applies to defense.
4. Look for consent-to-settle (hammer clause) wording; see the hammer clause: what happens if you refuse a settlement.
5. Ask how circumstances are reported, and whether a first extended reporting period is automatic.
6. Match the limits to your contracts, then ask what happens to an aggregate shared with cyber or management liability.
7. Keep claims-reporting instructions where your office manager can find them.

For what to expect after a report, see how professional liability claims unfold.

Key takeaways

• Professional liability pays for economic loss from negligent professional work; bodily injury and property damage belong on the general liability policy.
• It is nearly always claims-made, so the retroactive date, timely reporting and a plan for the tail matter as much as the limit.
• Read the definition of professional services first; work outside it can be uncovered.
• Contracts, not statutes, are the usual reason to buy it, but some licensing boards set minimums, and the rules differ by state and profession.
• Whether defense costs erode the limit changes what a $1 million limit really buys.