Updated June 17, 2026
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Open the calculatorGeneral liability covers physical risks: bodily injury to third parties, damage to someone else's property, and certain advertising injuries. Professional liability covers financial risks, specifically claims that your professional advice, services, or work product caused a client an economic loss. Most businesses that provide any kind of expertise or service need both, because neither covers the other's territory.
What General Liability Insurance Covers
General liability (GL) covers the physical, tangible things that go wrong when you operate a business. The three core coverage areas are:
- Bodily injury to third parties. A customer slips on a wet floor. A visitor is hurt at your job site. A bystander catches the wrong end of your equipment. GL covers medical costs and legal defense if the injured party sues.
- Third-party property damage. A contractor breaks a client's window. A cleaning crew damages expensive flooring. GL covers the repair or replacement costs and any resulting lawsuit.
- Personal and advertising injury. Claims that your ad copied someone else's work, that you made a false statement about a competitor, or that you invaded someone's privacy. It is triggered less often than the first two, but it matters for any business that advertises.
GL does not cover employee injuries (that is workers compensation), damage to your own property (commercial property), or financial losses a client claims from errors in your professional work (professional liability).
What Professional Liability Insurance Covers
Professional liability, also called errors and omissions (E&O) or malpractice in some fields, covers claims that your professional work caused a client a financial loss. Common scenarios:
- An accountant files a tax return with an error, and the client faces a penalty.
- A web designer delivers a site that does not work as specified, and the client loses sales while waiting for a fix.
- A consultant's recommendation is implemented and causes measurable financial damage.
- An IT firm misses a project deadline, and the client incurs direct costs from the delay.
- An engineer specifies the wrong materials, and the construction defect requires expensive remediation.
Professional liability policies are typically written on a claims-made basis. The policy in force when the claim is filed responds, not the policy in force when the error allegedly occurred. A brief gap in coverage can leave prior work unprotected. Tail coverage (an extended reporting period endorsement) keeps you covered after the policy ends.
Who Is Required to Carry Professional Liability
Some licensed professionals are required by state law or their licensing board to carry professional liability, including:
- Physicians and other healthcare providers, where state law or hospital credentialing requires it
- Attorneys, in some states and through bar association rules
- Architects and engineers, often required for licensure or state contracts
- Real estate agents and brokers, required by many state real estate commissions
Even without a legal requirement, professional liability is a practical necessity for any business that signs contracts promising a professional result. Clients often ask for a certificate of E&O coverage before they will sign a service agreement.
The SBA's insurance guidance recommends that service-based businesses specifically evaluate professional liability as a distinct coverage need, separate from general liability.
Side-by-Side Comparison
| Feature | General Liability | Professional Liability |
|---|---|---|
| Primary risk covered | Physical injury or property damage to others | Financial loss caused by professional errors |
| Policy trigger | Occurrence (when the event happens) | Claims-made (when the claim is filed) |
| Who needs it | Nearly all businesses | Service, consulting, and advice-based businesses |
| Typical annual cost | $500 to $2,000 | $800 to $3,000 |
| Covers employee injuries | No | No |
| Covers your own property | No | No |
| Covers client financial loss from your error | No | Yes |
| Covers slip-and-fall at your office | Yes | No |
Do You Need Both?
Most service-based businesses need both. A marketing agency faces GL exposure whenever a client visits the office and professional liability exposure whenever a campaign underperforms or a deliverable has an error. One policy without the other leaves a gap you will not enjoy discovering.
Product sellers or manufacturers with no advisory component may need only GL, plus product liability. Fully remote consultants with no client visits have minimal GL exposure, though most contracts still require it.
Costs vary by industry, state, payroll, and claims history. The only reliable way to know your actual cost is to get quotes for your specific situation. The business insurance cost calculator gives you a starting estimate for both policies.
Real-World Scenarios That Illustrate the Difference
Scenario 1: IT Consultant
An IT consultant visits a client's office to upgrade their server. While there, the consultant knocks over a $3,000 monitor. That is a GL claim (property damage to a third party). Later, the new server configuration causes two hours of downtime, and the client claims $15,000 in lost productivity. That one goes to professional liability. One visit, two separate policies.
Scenario 2: Graphic Designer
A graphic designer works entirely remotely with no clients visiting. GL exposure is low, mainly advertising injury. But the designer delivers a logo that infringes an existing trademark, and the client faces legal costs. That is a professional liability claim, not GL. For this designer, E&O coverage is the more important purchase.
Scenario 3: Restaurant Owner
A restaurant has high GL exposure: customer injuries, food illness, property damage. It has essentially no professional liability exposure. A BOP covering GL and commercial property is the right starting point, not E&O.
How Premiums Are Calculated
GL premiums are based on revenue, square footage, payroll, and headcount. Professional liability premiums are based on profession, revenue, years in practice, limits, and claims history. Both are influenced by your state, industry classification, and prior claims record.
OSHA safety standards for your industry can indirectly affect GL premiums. Businesses that document safety practices and keep clean incident records tend to see lower renewal rates over time.
Choosing the Right Limits
Standard GL limits are $1 million per occurrence and $2 million aggregate per year. Most commercial leases and client contracts require at least those minimums. Professional liability limits vary more: $500,000 to $2 million is common, and some contracts or licensing requirements mandate higher amounts.
An umbrella or excess liability policy adds limits above your GL at a relatively low additional cost. If you need higher total coverage without paying full standalone higher-limit premiums on each line, an umbrella is usually the more economical path.
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