Thanks for your question! Typically, your personal auto policy will extend to a rental car for you. Sometimes, depending on how old you are, you may need to purchase extra coverage. The rental company may require you to buy this extra coverage if you’re under 25.
To learn more about your options for insuring a rental car, check out this article: https://getjerry.com/advice/do-i-need-rental-car-insurance-or-is-my-personal-car-insurance-enough-by-brady-klopfer.