Updated June 17, 2026
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Open the calculatorGeneral liability insurance covers physical risks: bodily injury to third parties, damage to someone else's property, and certain advertising injuries. Professional liability insurance covers financial risks: claims that your professional advice, services, or work product caused a client to suffer an economic loss. Most businesses that provide any kind of expertise or service need both policies because neither covers the other's territory.
What General Liability Insurance Covers
General liability (GL) is designed for the tangible, physical things that can go wrong when you operate a business in the world. The three core coverage areas are:
- Bodily injury to third parties: A customer slips on a wet floor in your shop. A visitor is injured at your job site. A bystander is hurt by your equipment. GL covers the medical costs and legal defense if the injured party sues.
- Third-party property damage: A contractor accidentally breaks a client's window. A cleaning crew damages expensive flooring. GL covers repair or replacement costs and any resulting lawsuit.
- Personal and advertising injury: Claims that your advertising copied someone else's work, that you made a false statement about a competitor, or that you invaded someone's privacy. This is a less commonly triggered coverage but matters for businesses that advertise actively.
GL does not cover injuries to your own employees (that is workers compensation), damage to your own property (that is commercial property), or financial losses your clients claim because of mistakes in your professional work (that is professional liability).
What Professional Liability Insurance Covers
Professional liability, also called errors and omissions (E&O) insurance or, in some professions, malpractice insurance, covers claims that your professional work caused a client a financial loss. Specific scenarios include:
- An accountant files a tax return with an error that results in a penalty for the client.
- A web designer delivers a site that does not function as specified, and the client loses sales.
- A consultant's strategic recommendation is implemented and causes measurable financial damage.
- An IT firm fails to complete a project on deadline, and the client incurs costs from the delay.
- An engineer specifies the wrong materials, and the resulting construction defect requires expensive remediation.
Professional liability policies are typically written on a claims-made basis, meaning the policy in force when the claim is filed (not when the alleged error occurred) responds to the claim. This means gaps in coverage, even brief ones, can leave you exposed for prior work. Tail coverage or an extended reporting period endorsement addresses this issue when switching carriers or closing a business.
Who Is Required to Carry Professional Liability
Licensed professionals in certain fields are required by state law or professional licensing bodies to carry professional liability insurance. This includes:
- 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 when not legally required, professional liability coverage is effectively mandatory for any business that signs contracts promising a professional result. Clients increasingly request certificates of E&O insurance before signing service agreements.
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, for example, faces GL exposure every time a client visits the office (slip and fall, property damage) and professional liability exposure every time a campaign underperforms or a deliverable has an error. Carrying only one policy leaves a significant gap.
Pure product sellers or manufacturers with no advisory component may need only GL (plus product liability). Pure remote consultants with no physical office and no client visits may argue they have minimal GL exposure, though most carriers and 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 business. Start with the business insurance cost calculator to estimate what both policies might cost for your situation.
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 and breaks 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 is a professional liability claim (financial loss from a professional error). One visit, two policies.
Scenario 2: Graphic Designer
A graphic designer works entirely remotely and has no clients visit a home office. The designer's GL exposure is low (mainly advertising injury). But the designer delivers a logo that turns out to infringe an existing trademark, and the client faces legal costs. That is a professional liability claim. For this designer, E&O coverage is the more critical purchase.
Scenario 3: Restaurant Owner
A restaurant has high GL exposure (customer injuries, food-related illness, property damage). It has essentially no professional liability exposure because it does not provide professional advice. A BOP covering GL and commercial property is the right starting point, not E&O.
How Premiums Are Calculated
GL premiums are typically based on revenue, square footage, payroll, and number of employees. Professional liability premiums are based on the profession, revenue, years in practice, policy limits, and claims history. Both are influenced by your state of operation, industry classification, and prior claims record.
The OSHA safety standards for your industry can indirectly affect your GL premiums: businesses that document strong safety practices and maintain incident-free records over time often see lower renewal rates.
Choosing the Right Limits
Standard GL limits are $1 million per occurrence and $2 million aggregate annually. Many commercial leases and client contracts require at least these minimums. Professional liability limits vary more widely: $500,000 to $2 million is common, and some contracts or licensing requirements mandate higher limits.
An umbrella or excess liability policy can provide additional limits above your underlying GL policy at a relatively low additional cost, which is a practical option if you need higher total coverage without paying for full standalone higher-limit policies on each line.
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