As web technology spreads, the number, variety and sophistication of web-based information services is literally exploding. These information services are as web technology is increasingly adopted. The management of the finances of a business or organization in order to achieve financial objectives. The key elements to the process of financial management are financial planning, financial control and financial decision-making. This study introduces a model to manage financial activities for individual and organization by proposing a web-based management system. Online Finance Management System is a web based application which is used to manage personal financial accounts. To design and develop the system existing finance management systems were analyzed to make the newly developed system more flexible and user friendly. Different software tools such as XHTML, PHP, CSS, Java Script, Photoshop, MySQL and Apache Server were used to develop the system. One E-R diagram, data model diagram and two use case model for admin and user were developed.