This research aims to analyze and describe the implementation as well as the supporting and inhibiting factors in the business licensing service policy through the Online Single Submission Risk Based Approach (OSS-RBA) for MSMEs in the Pasuruan District Investment and One-Stop Service Office (DPMPTSP). The research location was conducted is located at the One Stop Investment and Services Agency (DPMPTSP) Pasuruan Regency, East Java. Because there were complaints from several business actors about the lack of optimal business licensing and unclear licensing procedures, which made them feel dissatisfied business actors complained on official social media accounts. There were complaints from several business actors about the need for optimal business licensing and unclear procedures permits that made them feel dissatisfied, so business actors complained on official social media accounts. Research results found DPMPTSP Pasuruan Regency prioritizes business licensing through OSS-RBA with appropriate procedures from BKPM. However, significant obstacles in the business licensing process include legal uncertainty, system compatibility issues, and a need for more knowledge among business actors. However, this obstacle can be overcome by the DPMPTSP of Pasuruan Regency, which prioritizes the OSS-RBA application as the primary licensing system.