Machine learning for insurance applications is provided to customers, potential customers, underwriters, and/or other insurance industry associates. An insurance application portal receives an insurance application from a customer regarding an insurance line of business of an insurance carrier. The portal can complete another insurance application for the customer for another line of business of the insurance carrier. The other insurance application is completed using information from the received insurance application and machine learning of customer data to infer inputs of information that does not overlap between the two applications. The portal can provide the completed second insurance application to the customer for approval to apply for the second line of business.