The degree addresses the development of a web application for a well-known Slovenian insurance company, which will help marketing of insurance products and gaining new customers. First part of the degree starts with introduction of the insurance company, its products and problems with their accessibility to the customers. Further on, the author introduces the complexity of existing form application, which is used by agents outside offices and the differences between slightly curtailed version which will be available to customers via Internet. The main part of the degree, which is divided into several sub-sections, deals the whole development process of the web portal and the work that was done before the actual development to make it run smoothly. Writing of functional specification and defining business requirements is one of the tasks that must be performed prior to development. Development section describes the procedures for designing and constructing the data model and later database, selection and presentation of user interface, descriptions of selected tools and descriptions of selected components on the user interface. The main part is followed by the chapter dealing with safety, maintenance and options for upgrading the web portal. The objective of implementing such solution is to increase the number of new customers who are directed through the portal to contact an insurance agent.