Liability Insurance Showdown: CGL vs. Professional—You Need Both

There’s a misconception floating around that a Commercial General Liability (CGL) policy is all the liability insurance you need. It’s wrong—dangerously wrong. Here’s the thing: a CGL covers physical risks like a customer slipping on your lobby floor, but it won’t help if you give bad advice that costs a client $150,000. That’s where professional liability (also called errors and omissions, or E&O) steps in. I’ve seen too many small businesses assume they’re protected, only to face a claim that their policy flat-out won’t touch. Let’s break down the differences, because you likely need both.

What does a CGL actually cover?

General liability insurance (GLI) is your frontline defense against third-party claims of bodily injury, property damage, and personal/advertising injury. It helps pay for legal fees, judgments, and settlements, plus minor medical expenses if someone gets hurt at your business—regardless of fault (The Hartford, General Liability). That’s essential, but it’s only half the story.

What does professional liability cover?

Professional liability (E&O) protects you when you make a mistake in the professional services you provide—think negligence, misrepresentation, inaccurate advice, or even copyright infringement (The Hartford, Professional Liability). It does not cover intentional misconduct or fraud, and it won’t touch bodily injury claims, which is why you can’t replace one with the other (Cornell Law School Wex, Errors and Omissions).

Where do people get confused?

The big mix-up is thinking a CGL covers everything. It doesn’t. A CGL is occurrence-based, meaning it covers incidents that happen during the policy period, even if the claim comes later. Professional liability is usually claims-made-and-reported, so it only covers claims made while the policy is active—and it has a retroactive date that can bite you if you’re not careful (IRMI). If you drop a client’s expensive equipment, your CGL might help, but if you give flawed tax advice, you’re on the hook without E&O.

How do the limits and costs compare?

Typical CGL limits are $1 million per occurrence with a $2 million aggregate (IRMI). Professional liability limits often start at $1 million per claim, with higher limits available for larger projects (IRMI). Average annual cost for a CGL is about $810 from The Hartford (The Hartford, General Liability). For professional liability, Hartford’s average minimum monthly premiums range from $38 for healthcare professionals to $146 for tech companies (The Hartford, Professional Liability). That’s a few hundred to a few thousand a year—small compared to a $150,000 attorney bill.

Do I really need both?

Yes. Think of a freelance IT consultant. Their CGL covers a client tripping over their laptop bag, but if their software error causes a client to lose $500,000 in sales, that’s an E&O claim. Without E&O, they’re paying out of pocket. The Hartford explicitly recommends carrying both for full protection (The Hartford, Professional Liability). A Business Owner’s Policy (BOP) bundles CGL with property insurance—average cost $1,687 a year—but it still doesn’t include professional liability (The Hartford, Business Owner's Policy). You need a separate policy or endorsement.

What about umbrella insurance?

Umbrella insurance extends your liability limits, but it only kicks in after your underlying policies are exhausted. Commercial umbrella can broaden coverage across multiple policies, like CGL and auto, but it won’t cover property claims or replace missing coverage (The Hartford, Commercial Umbrella). It’s a safety net, not a substitute.

Quick tip: When comparing policies, check the retroactive date on your professional liability—it sets the earliest incident you’re covered for, and you want it to match when you started your business.

Bottom line

The single best move is to buy both a CGL and professional liability policy, and consider a commercial umbrella to boost your limits. It’s not about spending more—it’s about covering the two distinct risks every business faces: physical harm and professional mistakes. Don’t learn this the hard way.

Sources

• IRMI – Contractors Professional Liability and the CGL
• The Hartford – General Liability Insurance
• The Hartford – Professional Liability Insurance
• The Hartford – Business Owner's Policy
• The Hartford – Commercial Umbrella
• Cornell Law School Wex – Errors and Omissions