Actualizes the progressiveness of digital business, gig economy brings easiness for people to search and do project using platforms. This opportunity may affect many treats, such as inefficient business processes and lack of professionalism. Many operators of gig platform govern their business processes intuitively without clear method or roadmap so that their growth is not predictable. This study proposes maturity model for gig economy business process to standardize growth of gig economy by considering the differentiating factors. It encompasses five levels: Initial, Defined, Standardized, Measured, and Optimized. They are appraised using eight staged Business Process Areas, related Specific Goals, and detail Specific Practices. This model relies on the evidence as Work Product to decide the compliance on each level. This maturity model is developed through five phases with hierarchy from CMMI-Service. It produces guidance to evaluate current reflection and formulate necessary improvement towards mature and qualified business processes in gig economy. Therefore, gig economy can generate more benefits and contributions for society.