SISMIOP is the heart of the United Nations because all aspects of administrative management that can manage data objects and tax subjects that have been computerized start from the process of data collection, assessment, penyangihan, acceptance and service. The existence of SISMIOP is intended to create an accurate and up to date database by intercepting all UN administration activities into a container, so that the implementation is more uniform, simple, Fast and efficient. To know how far the management of the Tax Object Management Information System (SISMIOP) that has been used by the Financial and Asset Management Revenue Service, it is necessary to measure by using good method and framework. The tools or tools used to evaluate the governance of SISMIOP are using Control Objective For Information and Related Technology 5 (COBIT 5.0). The COBIT 5.0 maturity model does not intend to measure a level very accurately or certify when a level is achieved, but rather to a relevant picture or condition of some level of maturity to be achieved, this model is appropriate when management wants to see conformity to the conditions of information technology development And proper maturity.