liability insurance coverage
Liability insurance coverage is insurance that protects an insured party against covered legal liability to a third party. Depending on the policy, it may cover sums the insured becomes legally obligated to pay because of bodily injury, property damage, professional errors or omissions, employment practices, management-related wrongful acts, or other specified risks. Common forms include automobile liability, commercial general liability, professional liability (errors and omissions), directors and officers (D&O) liability, employment practices liability, and umbrella or excess coverage.
Liability coverage is determined by the insurance policy as a whole. The insuring agreement identifies the initial grant of coverage, while definitions, declarations, endorsements, exclusions, conditions, deductibles or self-insured retentions, and policy limits shape the insurer's obligations. An insured's legal liability alone does not establish insurance coverage: the claim also must fall within the policy's grant, satisfy applicable conditions, and not fall within an applicable exclusion. State law governs many questions of policy interpretation and insurer obligations.
Many liability policies distinguish the duty to defend from the duty to indemnify. A duty to defend requires the insurer to provide or fund a defense against a covered or potentially covered suit; the duty to indemnify concerns payment of covered liability, such as a covered judgment or settlement, subject to the policy's terms. The defense duty is often broader. For example, New York courts require a defense when the allegations of the underlying complaint suggest a reasonable possibility of coverage. The policy and governing law remain critical, because some policies reimburse defense costs rather than impose a duty to defend, and defense expenses may be paid in addition to, or may reduce policy limits. See: Automobile Insurance v. Cook, 7 N.Y.3d 131 (2006).
Timing also matters. An occurrence policy generally covers claims arising from a covered occurrence during the policy period, even if the claim is made later. A claims-made policy generally responds when a claim is first made against the insured during the policy period, subject to any retroactive date and other terms. A claims-made-and-reported policy additionally requires the claim to be reported to the insurer within the time specified by the policy. An extended reporting period, often called tail coverage, can permit later reporting of certain claims but ordinarily does not expand the underlying scope of covered acts.
An insurer may defend under a reservation of rights while preserving one or more coverage defenses. Either party may seek a declaratory judgment to resolve whether the insurer must defend or indemnify. Notice, cooperation, consent-to-settle, and other conditions can affect coverage, and excess or umbrella insurance may attach only after specified underlying insurance has been exhausted. Because wording and state law vary, a coverage analysis usually requires the actual policy, the allegations, the facts, and the law of the relevant jurisdiction.
[Last reviewed in July of 2026 by the Wex Definitions Team]
Wex