Business
Professional Liability Insurance: What It Costs and What to Check
Published September 24, 2026 · Last updated October 1, 2026
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The short answer
Professional liability insurance cost for a small business is often about $88 a month. Most pay somewhere from about $400 to more than $7,000 a year. It covers you if a client says your work, advice, or service cost them money, and it pays your legal bills.
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What is professional liability insurance?
Professional liability insurance protects you when a client blames your work for a money loss. Maybe you missed a deadline, made a mistake, or gave advice that didn't work out. It pays for your legal defense and any settlement or judgment, up to your policy limit.
You may also hear it called errors and omissions insurance, or E&O. In medicine and law, it's usually called malpractice insurance. They all do the same basic job.
What professional liability insurance covers
A typical policy covers claims that your work was:
- Wrong. You made a mistake or gave bad advice.
- Late. You missed a deadline and the client lost money.
- Incomplete. You didn't deliver everything you promised.
- Careless. A client says you didn't do the job with enough skill or care. This is called negligence.
- Misleading. A client says you told them something that wasn't true.
It also pays for your lawyer, even if the claim has no merit. Defense costs alone can add up fast.
What it doesn't cover
- Injuries and property damage. If a client trips in your office, that's general liability insurance.
- Your employees' injuries. That's workers' comp.
- Data breaches and hacks. That's cyber insurance.
- Intentional or dishonest acts.
Who needs professional liability insurance?
If people pay you for advice, a plan, a design, or a service they could blame for a loss, you may need it. Some states require it for lawyers and doctors. Many clients also require it in their contracts.
Businesses that often carry it include:
- Accountants, bookkeepers, and tax preparers
- Consultants and IT pros
- Architects and engineers
- Real estate and insurance agents
- Graphic designers, marketers, and software developers
How much does professional liability insurance cost?
Small businesses pay about $88 a month on average for professional liability, based on one online marketplace's customers. That same data shows a range from about $400 to more than $7,000 a year.
What changes your price:
- Your line of work. Jobs where mistakes are costly, like finance or engineering, usually cost more.
- Your coverage limit. Higher limits cost more.
- Your deductible. Deductibles often range from $1,000 to $25,000. A higher one lowers your price.
- Your size. More revenue, clients, and staff mean more risk.
- Your claims history. Past claims can raise your rate.
Prices change based on your business and your state. The quickest way to know your price is to get a quote.
Claims-made vs. occurrence: why timing matters
Most professional liability policies are "claims-made." That means the policy must be active both when the mistake happened and when the client files the claim. If you cancel your policy and a client sues next year over old work, you may not be covered.
An "occurrence" policy covers events that happened while the policy was active, even if the claim comes later. If you're retiring or changing careers, ask about occurrence coverage or tail coverage. Tail coverage extends the time you can report claims after a claims-made policy ends.
How much professional liability insurance do you need?
Start with your contracts. Many clients spell out a minimum limit you must carry. After that, think about the size of your projects. A mistake on a big job can lead to a big claim.
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What to ask before you choose
- Is this claims-made or occurrence?
- Does it cover work I did before the policy started? This is called prior acts coverage.
- Do my legal costs reduce my coverage limit, or are they paid on top?
- What limit do my client contracts require?
- What does tail coverage cost if I close or retire?
Keep reading
Build out your business coverage with general liability insurance, a business owner's policy, cyber insurance, and workers' comp.
Core business insurance: Small business insurance cost · General liability · Workers' comp · Business owner's policy · Commercial auto · Commercial property · Cyber insurance · LLC insurance · General liability vs. a BOP · Home-based business insurance · All business services
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