Also known as: casualty coverage · casualty lines
Casualty insurance covers financial losses your business causes to third parties — primarily through liability claims for bodily injury, property damage, or professional errors.
Casualty insurance is the broad category of coverage that protects your business when it becomes legally liable to pay damages to someone else. It is the liability side of the property-and-casualty (P&C) pair that makes up most commercial insurance. For startups, casualty lines typically include General Liability (bodily injury and property damage), Professional Liability / Tech E&O (errors in your product or service), Cyber Liability (data breach costs), and Directors & Officers liability (management decisions). Unlike property insurance — which covers damage to things you own — casualty insurance covers claims made against you by others. Underwriters categorize risk into property lines (your assets) and casualty lines (your obligations to third parties). Most startup policies are casualty-heavy because the primary exposures are professional errors and data-related liabilities, not physical property.
Vendor contracts often require "commercial casualty coverage" or list specific casualty lines such as "Commercial General Liability" and "Professional Liability" in their insurance exhibit.
Property insurance covers physical assets your business owns — equipment, office space, inventory — when they are damaged or destroyed. Casualty insurance covers your legal liability to third parties — customers, vendors, or the public — when they are injured, their property is damaged, or they suffer a financial loss because of your actions. Most startup policies are casualty-focused because the biggest exposures are professional errors and data-related liabilities, not physical assets.
The main casualty lines for startups are: General Liability (bodily injury and property damage), Technology Errors & Omissions (professional mistakes in your product), Cyber Liability (data breaches and ransomware), and Directors & Officers liability (board-level decisions). Workers Compensation and Umbrella/Excess coverage are also casualty lines, though they serve different functions.
Yes — almost every enterprise vendor agreement and SaaS MSA requires proof of active casualty coverage as a condition of signing. The contract's insurance exhibit will specify the required lines (typically General Liability and Tech E&O) and minimum limits. RiskCube can review the contract and bind the required coverage, usually within one to two business days.
In practice, yes — "casualty insurance" and "liability insurance" are often used interchangeably. Technically, casualty is the broader industry classification that encompasses liability, workers compensation, and certain accident coverages. When a vendor contract or broker refers to casualty insurance, they almost always mean liability protection for third-party claims.
Definitions are educational and may be modified by your specific policy language, endorsements, and state rules. For regulatory guidance, refer to the California Department of Insurance or the NAIC.
Last updated: July 2026.