Errors and Omissions (E&O) Insurance Explained

Errors and omissions insurance has a name that actually tells you what it does: it covers the errors you make and the things you omit in your professional work — when a client claims those mistakes cost them money. It's the same thing as professional liability insurance, and for any business that sells expertise, it's the coverage that keeps a single dissatisfied client from becoming a financial crisis.

What "errors and omissions" actually means

The name splits your professional risk into two halves:

• Errors — something you did wrong. A miscalculation, a flawed recommendation, a coding mistake, a misfiled document.
• Omissions — something you failed to do. A step skipped, a risk not flagged, a deadline missed, advice not given.

E&O responds when a client alleges either one caused them a financial loss, covering both your legal defense and any settlement or judgment up to the policy limit. The defense coverage matters enormously, because clients can sue over a perceived error even when you handled the work correctly. What is professional liability.

What E&O typically covers

• Negligence or alleged negligence in your professional services.
• Mistakes, errors, and oversights in your work.
• Failure to deliver promised services or meet a professional standard.
• Missed deadlines that caused a client harm.
• Defense costs — often the single biggest reason to have it.

Common professional liability claims.

What E&O does NOT cover

• Bodily injury and property damage — that's general liability. E&O vs general liability.
• Intentional, fraudulent, or criminal acts.
• Employment disputes — that's EPLI.
• Cyber and data breaches — that's cyber liability (though some overlap exists for tech E&O).
• Your own business property — that's commercial property.

The claims-made structure (read this carefully)

Most E&O policies are claims-made, not occurrence-based. The difference is crucial:

• A claims-made policy covers claims reported while the policy is in force, for work done after a set retroactive date.
• If you cancel and a claim arrives later — even for work done while you were insured — it may not be covered unless you bought tail coverage (an extended reporting period).

This is the most misunderstood feature of E&O. The practical takeaways: don't let coverage lapse between policies, preserve your retroactive date when you switch carriers, and buy tail coverage if you close or change the business. A broker who understands claims-made policies prevents the gap that catches people years after the work. Understanding professional risk.

The analogy

E&O works like a warranty on your professional judgment — but a claims-made warranty that has to be active when the complaint is made, not just when the work was done. Imagine a contractor's warranty that only honors claims while you're still paying for it: stop the coverage, and a complaint about last year's job has no warranty behind it. That's why continuity matters so much with E&O — the protection lives in the policy being active when the claim lands, not in when you did the work. What is professional liability.

Who needs E&O

If clients pay you for advice, expertise, or a professional service, you have E&O exposure. That's consultants, agencies, accountants, IT and tech firms, real estate professionals, architects, engineers, designers, financial professionals, and many more. Some clients and contracts require it before they'll engage you. Who needs professional liability.