Professional liability (E&O) insurance quotes for your business

How much does professional liability insurance cost in 2026?

Your premium depends on your profession and its risk, your annual revenue, the coverage limits you choose, your claims history, and how long you’ve been in business. Most professionals pay $50–$150 a month; higher-risk fields like architecture, engineering, and financial advice cost more. The figures below are illustrative averages, not quotes.

💡 Example: An independent consultant might pay around $65 a month for a $1 million policy. Your premium scales with the size of the contracts you take on and the limits clients require — many enterprise and government contracts mandate $1M–$2M in E&O before you can sign.

A plain-English guide to professional liability insurance

What is professional liability insurance?

Professional liability insurance — widely known as errors & omissions, or E&O — protects you when a client claims your professional services, advice, or work caused them a financial loss. It covers your legal defense and any settlement or judgment, even when the claim turns out to be groundless. If people pay you for your expertise, this is the coverage that protects you when they’re unhappy with the result.

E&O vs. general liability — what’s the difference?

This is the distinction that matters most. General liability covers bodily injury and property damage — a client slips in your office, or you damage their property. Professional liability covers financial harm from your work — a mistake, a missed deadline, or bad advice that costs a client money. A simple way to remember it: general liability is slips and damage; E&O is mistakes and advice. Many service businesses need both, because the two cover completely different risks.

What does it actually cover?

• ✓Negligence — actual or alleged errors in your professional work.
• ✓Mistakes and omissions — something done wrong, or left undone.
• ✓Misrepresentation — claims you misstated your services or results.
• ✓Missed deadlines — failing to deliver as promised.
• ✓Legal defense — attorney fees and settlements, even for baseless claims.

Claims-made coverage and the retroactive date

E&O usually works differently from other business policies. Most policies are written on a claims-made basis, which means they cover claims reported while the policy is active, for work done after a retroactive date. Two practical takeaways follow from this: you’ll want to keep coverage continuous rather than letting it lapse, and when you retire or switch carriers, you may want “tail” coverage (an extended reporting period) so a claim that surfaces later is still covered. A licensed agent can make sure your retroactive date and limits line up with your history.

Is it required?

No single law requires E&O across the board, but in practice it’s often non-negotiable. Client contracts frequently require it — enterprise customers and government agencies commonly mandate $1M–$2M in coverage before you can sign. Some professions must carry it to keep their license, depending on the state and field. And even when no one requires it, a single claim can cost far more than years of premium.

E&O, tech E&O, and cyber

Technology businesses sit at a crossroads: a software bug that costs a client money is an E&O issue, while a data breach is a cyber issue — and the two often come packaged together as “tech E&O with cyber.” If your work involves handling client data or building the systems they rely on, it’s worth quoting both so there’s no gap between them.

How is the price determined?

Carriers weigh your profession and its risk, your annual revenue, the limits and deductible you choose, your claims history, the specific services you offer, and how long you’ve been in business. Because insurers assess professional risk very differently, comparing carriers is the simplest way to avoid overpaying for the same protection.

How Dean Insurance helps

We’re an independent marketplace, so we shop multiple carriers instead of selling one company’s products. You answer a few questions once; we match you with the carriers and licensed agents best suited to your profession and the limits your clients require. The agents and carriers you connect with are licensed and authorized to sell in your state — they handle the advice, the policy, and your certificate of insurance. Using Dean Insurance is free; we’re paid by our partners only when you choose a policy, and your information is never sold to unrelated third parties. See our Privacy Policy for details.