Voluntary social insurance is a crucial component of the national social security system, aimed at providing stability for workers and their families in the face of potential risks. Building upon previous research on the factors influencing workers participation in social insurance, this study surveyed 200 workers in Thai Nguyen province who have either never participated in voluntary social insurance or have temporarily stopped their contributions to compulsory social insurance. The findings indicate that awareness of the necessity of voluntary social insurance has a positive impact on the participation of individual . However, factors such as understanding of the policy, satisfaction with the number of subsidy regimes, and conditions for receiving pensions through social insurance have a negative impact on participation. Based on these results, the study puts forth recommendations to address these negative impacts and promote the development of voluntary social insurance participants in Thai Nguyen province in the future.