Entrepreneurs do not need to memorize an insurance dictionary. Start with the terms that determine whether a loss is covered, how much you pay yourself, and how much protection the policy can provide.

A premium is the amount an insurance company charges for a policy. A business may pay annually, monthly, or according to another payment schedule offered by the insurer.

Premiums can depend on the business’s industry, location, revenue or payroll classifications, property values, vehicles, claims history, selected limits, deductibles, and other underwriting factors.

A deductible is an amount the insured generally absorbs before applicable insurance pays a covered loss. Deductibles are common in commercial property, auto physical damage, cyber, and other types of insurance.

Higher deductibles can reduce premiums in some circumstances because the business retains more of each eligible loss. The tradeoff is greater out-of-pocket exposure after a claim.

Hypothetical Example

Suppose a hypothetical commercial property policy has a $2,500 deductible and an eligible covered loss is valued at $20,000. The business could be responsible for the first $2,500, with the policy responding to the remaining eligible amount subject to limits and all other terms. These figures are illustrative only and are not recommended deductibles or national averages.

A policy limit is the maximum amount of insurance available for a covered loss or category of claims under the applicable provisions.

A policy can contain several different limits. General liability insurance, for example, can use separate limits for individual occurrences and an aggregate limit for claims during the policy period.

Commercial property policies can likewise assign different limits to buildings, business personal property, business income, and specialized property categories.

Occurrence Limit

An occurrence limit is generally the most the policy will pay for applicable covered damages arising from a single occurrence, subject to the contract.

Aggregate Limit

An aggregate limit generally caps how much coverage is available for specified claims during the applicable policy period. Multiple claims can reduce the remaining aggregate available for later covered losses.

An exclusion is policy language that removes or restricts coverage for a particular risk, cause of loss, property type, activity, person, or circumstance.

Exclusions are one of the most important parts of any commercial policy because they show where insurance stops. A general liability policy, for example, commonly does not substitute for commercial auto, workers’ compensation, or professional liability coverage.

An endorsement changes the standard policy. Depending on its wording, an endorsement can add coverage, remove coverage, modify limits, change definitions, add an insured, or impose special conditions.

Two businesses can purchase policies with the same basic form but receive materially different protection because their endorsements differ. Review the complete endorsement schedule rather than only the declarations page.

Named Insured

The named insured is the person or business entity identified as an insured on the policy declarations. The named insured generally receives important contractual rights and responsibilities under the policy.

Additional Insured

An additional insured is another person or organization provided insured status under specified circumstances. Landlords, project owners, contractors, or customers sometimes require additional-insured status in commercial agreements.

Additional-insured coverage is not automatically identical to the protection provided to the named insured. The applicable endorsement determines its scope.

A certificate of insurance, often called a COI, provides evidence of insurance information such as the insurer, policy type, policy period, and listed limits.

Businesses commonly provide certificates to landlords, customers, general contractors, lenders, or other parties that want evidence of coverage.

Commercial general liability insurance, often abbreviated CGL, is the standard liability coverage used by many businesses.

It commonly addresses covered claims involving:

• Third-party bodily injury.
• Damage to another person’s property.
• Premises liability.
• Products and completed operations liability.
• Certain personal and advertising injury claims.

CGL coverage can also include defense against covered lawsuits according to the contract. It generally does not insure the business’s own building, inventory, or equipment against physical damage.

Commercial property insurance protects eligible physical business property against covered causes of loss.

Depending on the policy, protected property can include:

• Buildings.
• Furniture.
• Machinery and equipment.
• Computers and office equipment.
• Inventory.
• Certain property of others in the insured’s care where coverage applies.

Coverage depends on the insured cause of loss, location, property description, valuation provision, limits, deductibles, exclusions, and endorsements.

Business personal property generally refers to eligible movable property used in the business rather than the building itself.

Examples can include desks, computers, equipment, inventory, shelving, furnishings, and other insured property. Entrepreneurs should update property values as they purchase equipment or accumulate additional inventory.

Replacement Cost

Replacement cost generally refers to the cost to repair or replace covered property with property of comparable kind and quality without subtracting depreciation, subject to the policy’s conditions and limits.

Actual Cash Value

Actual cash value generally reflects depreciation or other valuation considerations under the contract. It can produce a lower claim payment than replacement-cost valuation for older property.

A Business Owners Policy, or BOP, is a package designed for many qualifying small businesses. NAIC and state regulator guidance describe BOPs as typically combining several core coverages in one policy.

• General liability insurance.
• Commercial property insurance.
• Business interruption or business income insurance.

A BOP can simplify buying insurance and may be cost-effective compared with purchasing comparable coverage separately, but not every business qualifies.

Business interruption insurance, also called business income insurance, can help protect a company from certain monetary losses when operations are suspended because a qualifying covered event causes property damage.

Depending on the contract, coverage can help with lost income and certain continuing or extra expenses during the restoration period.

A decline in sales alone generally does not create a covered business income claim. The loss must satisfy the policy’s coverage trigger, cause-of-loss requirements, waiting periods, restoration provisions, and exclusions.

Professional liability insurance, commonly called errors and omissions insurance or E&O in many industries, addresses specified claims arising from professional services.

Claims can allege:

• Professional negligence.
• Errors or omissions.
• Failure to perform promised professional services.
• Failure to meet applicable professional standards.

Consultants, accountants, technology firms, designers, real estate professionals, and other service businesses may have professional liability exposures that a standard general liability policy does not cover.

Commercial auto insurance is designed for vehicle exposures arising from business operations.

Depending on the selected coverage, a commercial auto policy can include liability, collision, comprehensive, uninsured or underinsured motorist, medical payments or PIP where applicable, and provisions for hired or non-owned vehicles.

A typical BOP does not automatically include commercial auto coverage.

Hired auto generally refers to qualifying vehicles a business rents, leases, hires, or borrows rather than owns.

Non-owned auto generally refers to certain vehicles used for business that the company does not own, such as an employee’s personal car used for a company errand.

Coverage for these exposures is especially important to review when a business regularly rents vehicles or allows employees to drive personal cars for work.

Workers’ compensation insurance provides benefits for qualifying work-related employee injuries and occupational illnesses according to applicable state law.

Benefits can address medical care, wage replacement, rehabilitation, disability, or death benefits depending on the jurisdiction and circumstances.

Requirements differ substantially among states, including which employers must carry coverage and which workers or business owners may be exempt.

Cyber insurance can address specified financial losses arising from cyber incidents and data-security events. Coverage varies considerably among insurers.

Depending on the contract, coverage can address some combination of:

• Data breach response expenses.
• Data restoration.
• Cyber-related business interruption.
• Specified cyber extortion expenses.
• Privacy or security liability claims.
• Certain investigation, notification, or crisis-management expenses.

Cyber policies can be highly customized, making exclusions, security conditions, sublimits, waiting periods, and definitions particularly important.

Commercial umbrella insurance provides additional liability protection above specified underlying policies when its requirements are satisfied.

A business may consider umbrella coverage when a serious liability claim could exceed the limits of general liability, commercial auto, or another qualifying underlying policy.

Umbrella insurance is not simply unlimited coverage. It has its own limits, exclusions, required underlying insurance, and other contractual conditions.

Inland marine insurance is a category of property coverage commonly used for certain equipment, tools, goods, or other property that moves between locations or has exposures not adequately addressed by standard premises-based property insurance.

Contractors, installers, photographers, technology firms, and businesses transporting specialized equipment may have inland marine exposures, depending on the property involved and policy design.

A claim is a request for coverage or payment under an insurance policy after an event that may fall within the contract.

After receiving a claim, the insurer can investigate the facts, determine whether coverage applies, estimate the covered loss, apply deductibles and limits, and issue payment or a coverage decision according to the policy and applicable law.

Prompt notice, documentation, photographs, receipts, contracts, inventories, financial records, and other evidence can be important depending on the type of loss.

Underwriting is the insurer’s process for evaluating a business and deciding whether to offer insurance and on what terms.

An underwriter can consider factors such as:

• Industry and business operations.
• Location.
• Property construction and protection features.
• Revenue, payroll, or other exposure measurements.
• Claims history.
• Vehicles and drivers.
• Risk-management procedures.

The policy period is the period during which insurance is in effect, subject to the contract. The declarations page normally identifies the effective and expiration dates.

Businesses should review renewal information before expiration because premiums, limits, deductibles, forms, endorsements, and insurer appetite can change.

Liability policies can use different coverage triggers. Two important structures entrepreneurs may encounter are occurrence and claims-made forms.

An occurrence-based policy generally focuses on when the covered injury or damage occurred. A claims-made policy generally places greater importance on when the claim is first made and reported, together with any applicable retroactive date and reporting provisions.

Professional liability and certain specialized policies are frequently written on a claims-made basis, making continuity of coverage and reporting rules particularly important.

Insurance terminology is most useful when it helps you compare actual protection rather than simply recognize definitions. When reviewing quotes, examine the complete structure of each proposal.

• Compare premiums. Determine what each policy costs using equivalent payment assumptions.
• Compare deductibles. Know how much your business must absorb before applicable coverage responds.
• Compare limits. Look at per-occurrence, aggregate, property, business income, cyber, auto, and other relevant limits.
• Read exclusions. Identify important exposures that remain uninsured.
• Review endorsements. Determine how each policy has been changed from its standard form.
• Confirm insured entities. Make sure the correct legal business names and required additional insureds are addressed.
• Check valuation. Review whether important property is insured on replacement-cost, actual-cash-value, or another basis.
• Identify specialized gaps. Consider commercial auto, workers’ compensation, professional liability, cyber, flood, crime, and other risks separately.
• Review coverage as the company grows. New employees, vehicles, locations, equipment, products, contracts, and services can change insurance needs.

Business insurance terminology tells you how risk is divided between your company and the insurer. Premiums determine what coverage costs, deductibles establish how much of certain losses you retain, limits cap available insurance, exclusions identify important gaps, and endorsements change the standard contract.

Understanding coverage names is equally important. General liability, commercial property, business income, professional liability, commercial auto, workers’ compensation, cyber, umbrella, and inland marine policies solve different problems. Compare the actual wording, limits, deductibles, exclusions, insured entities, and endorsements rather than assuming a broad policy name protects every part of the business.

• National Association of Insurance Commissioners, Glossary of Insurance Terms, accessed August 2026.
• National Association of Insurance Commissioners, Small Business Insurance, accessed August 2026.
• National Association of Insurance Commissioners, Business Interruption and Business Owner Policy, updated June 25, 2026.
• U.S. Small Business Administration, Launch Your Business, accessed August 2026.
• California Department of Insurance, Commercial Insurance Guide, revised June 14, 2024.