This study investigates the impact of Fintech Adoption, MSME Digital Readiness, and the Regulatory Environment on Financial Performance in Indonesia's micro, small, and medium enterprises (MSMEs). Using a quantitative analysis with a sample size of 170, data was collected using Likert scales and analyzed through Structural Equation Modeling - Partial Least Squares (SEM-PLS 3). Results indicate that all relationships hypothesized (Fintech Adoption, MSME Digital Readiness, and Regulatory Environment -> Financial Performance) are positively significant. Specifically, Fintech Adoption positively influences Financial Performance, MSME Digital Readiness shows a significant positive impact on Financial Performance, and a supportive Regulatory Environment enhances Financial Performance significantly. These findings underscore the importance of technological integration, digital preparedness, and regulatory support in bolstering financial outcomes for MSMEs in Indonesia.