Business Insurance Writer

Resides In

San Francisco Bay area


University of Delaware, Oklahoma City University


Commercial Insurance, Business Insurance, Insurance Underwriting, Property-Casualty Insurance


  • Writes about business insurance for Investopedia, covering topics from commercial insurance to policies and underwriting
  • Worked 30 years in the property-casualty insurance industry, including as an analyst and underwriter 
  • Holds numerous professional designations, including the Chartered Property and Casualty Underwriter (CPCU) and the Associate in Risk Management (ARM) 
  • Extensive knowledge of commercial insurance coverages and policy forms


Marianne Bonner covers a variety of small business insurance topics for Investopedia, with expertise in commercial insurance, policies, underwriting, and more. A designated Chartered Property and Casualty Underwriter (CPCU) and Associate in Risk Management (ARM), Marianne worked for 30 years in the property-casual insurance industry, including as an analyst and underwriter.

Marianne began her insurance career as a casualty underwriter at the Continental Insurance Company. She went on to work for Maryland Casualty, Safeco, and Continental International. After 13 years in commercial underwriting, Marianne joined Marsh USA, a large insurance brokerage. At Marsh she served as a coverage analyst and vice president.

Since 2010, Marianne has worked as a freelance writer and insurance consultant. She wrote for The Balance for 10 years, and has written many articles for The Risk Report, a subscription publication distributed by the International Risk Management Institute. 


Marianne has a bachelor's degree in dietetics from the University of Delaware and a master's degree in business administration from Oklahoma City University.