Last Updated on October 15, 2026 by Syed Sarim Naqvi
Professional liability insurance, also called errors and omissions (E&O) insurance, covers claims that your professional advice or services caused a client financial loss through a mistake, oversight or failure to perform. Small businesses pay a median of about $61 a month, or roughly $735 a year, and most policies are written on a claims-made basis, so retroactive dates and tail cover decide whether an old job is still protected.
Key Takeaways
- Professional liability covers financial loss from your work, while general liability covers bodily injury and property damage
- Insureon reports a median of $61 a month ($735 a year), and a trade glossary cites $61 to $78 a month ($730 to $940 a year)
- Most policies are claims-made: they pay only if the claim is made while the policy is active, and the work falls after the retroactive date
- Limits commonly run from $1 million to $5 million per claim, and many client contracts set a minimum
- Tail cover extends the reporting window after a policy ends, which matters if you retire, sell the business or switch insurers
What Is Professional Liability Insurance?
Insurance Business describes it as cover, sometimes called professional indemnity, for claims related to errors, omissions or negligence in delivering a professional service. The Hartford adds that it can help pay the costs of defending a negligence lawsuit and any settlements. MoneyGeek explains the dividing line with general liability: if you slip and injure a client, that is general liability; if your accounting error costs a client money, that is professional liability. Consultants, designers, accountants, IT firms and freelancers are typical buyers.
How Is It Different From General Liability?
| Aspect | Professional Liability | General Liability |
|---|---|---|
| What it covers | Errors, omissions, bad advice and failure to perform contracted work | Bodily injury, property damage and advertising-related claims |
| Cost drivers | Type of business, number of employees, claims history, risk level | Business size, industry, location, risk exposure |
| Typical policy basis | Claims-made | Occurrence-based |
The table follows Insurance Business Magazine’s comparison and Insureon’s note that claims-made wording is common in professional liability and directors and officers cover.
How Much Does It Cost?
Insureon reports that small businesses pay an average premium of about $61 a month, or $735 a year, drawn from the median cost of policies its customers bought, and says your industry has the biggest effect on the price. Insurance Business puts the range at $61 to $78 a month, or $730 to $940 a year. As an illustration only, $61 a month for five years is about $3,660 in premiums, which is small next to a claim that can run into six figures in defense and settlement costs.
- Industry and services: higher-risk professions pay more
- Claims history and size: past claims and more employees raise the price
- Limits: MoneyGeek says limits typically run $1 million to $5 million per claim, and higher-risk professions or large clients often need $2 million to $5 million
What Does Claims-Made Mean?
Insurance Business explains that a claims-made policy provides cover only if the claim is made while the policy is active, and that both the alleged act and the claim must occur during the policy period unless a retroactive date is specified. TechInsurance adds that if a client lets a claims-made policy lapse before reporting an incident, the insurer will not recognize the claim. For this reason, Insureon warns that buying cover for a project and dropping it afterward can backfire with claims-made policies.
What Are the Retroactive Date and Tail Cover?
Insureon explains that the retroactive date determines how far back an incident can occur for the policy to still protect you, and that if you have had continuous cover, your retro date is the earliest date from which you kept coverage active. TechInsurance defines tail cover as protection for incidents that occurred while you held the policy but were not reported until after it expired, and prior acts (nose) cover as protection for events before the policy began, back to the retroactive date. Indeed notes that tail coverage extends the claim period but not the policy period. MoneyGeek says to keep continuous cover so claims arising years after completing work are still protected.
What Is Not Covered?
MoneyGeek says most insurers will not cover known claims or circumstances that could lead to claims, so you need cover before problems arise. Work performed before the retroactive date is also outside the policy. Bodily injury and property damage belong to general liability, and your own equipment and data losses belong to separate property or cyber policies.
How Does This Connect to the Rest of Specialty Insurance?
E&O is the standard protection for people who sell expertise. See how it fits alongside media and gear cover in Content Creator and Influencer Insurance Explained, and how cyber-style risks are handled in Deepfake Insurance Explained. For protecting a business that depends on one expert, read Key Person Insurance Explained, for small-operator bundles Food Truck Insurance Explained, and for liability above limits, Umbrella Insurance Explained.
FAQ
What is professional liability insurance?
Cover for claims that your professional services or advice caused a client financial loss through mistakes, omissions or negligence.
Is E&O the same as professional liability?
Yes. Errors and omissions insurance is another name for professional liability insurance.
How much does it cost?
Reported small-business averages are about $61 to $78 a month, or $730 to $940 a year, depending on industry and risk.
What is a claims-made policy?
A policy that pays only if the claim is made while it is active and the work falls after the retroactive date.
What is tail coverage?
An add-on that extends the window to report claims about work done while you were insured, after the policy ends.
How much cover do I need?
Limits commonly range from $1 million to $5 million per claim, and many contracts specify minimums.
Can I cancel it after a project ends?
You can, but with claims-made cover that can leave you uninsured when a claim surfaces later, so consider tail cover or continuous cover.
Glossary
- Errors and Omissions (E&O): another name for professional liability cover.
- Claims-Made Policy: cover that responds to claims reported while the policy is active.
- Retroactive Date: the earliest date of work the policy will cover.
- Tail Coverage: an extended reporting period after the policy ends.
- Prior Acts (Nose) Coverage: cover for events before the policy began, back to the retro date.
- Aggregate Limit: the most the insurer pays for all claims in a policy period.
Sources
- Insureon: Errors and Omissions Insurance Cost (median premium, industry effect, dropping cover)
- Insureon: Retroactive Date (retro date mechanics, claims-made basics)
- Insurance Business: Professional Liability Insurance (definition, cost range, claims-made, comparison with general liability)
- MoneyGeek: Professional Liability Insurance (limits, known-claim exclusion, general versus professional)
- TechInsurance: E&O Insurance Glossary (tail, nose, lapsed claims-made policies)
- Indeed: Professional Liability Insurance Options (tail cover purpose, retroactive policies)
- The Hartford: Professional Liability Insurance (defense and settlement costs, claims-made example)
Related reading: Short-Term Rental Insurance Explained · Landlord Insurance Explained · Drone Insurance Explained
Published October 2026. Prices and plan terms vary by insurer and profession and change often; always read the retroactive date and exclusions, and refresh this article periodically.
Leave a Reply