Business interruption insurance should be considered to be as important to your insurance portfolio as a business as fire insurance. Most people would never consider opening a business without buying insurance to cover damage due to fire and windstorms. But too many small business owners fail to think about how they would manage if a fire or other disaster damaged their business premises so that they were temporarily unusable. Business interruption coverage is not sold separately. It is added to a property insurance policy or included in a package policy.