The number of jobs caused by work is still very high. The implementation of Occupational Safety and Health (OSH) is an obligation for all parties. Occupational accidents and diseases will have a negative impact on the project. Projects can be carried out well if the course of the project can be controlled properly. Based on previous research conducted in October-December 2022 located at Simpang Joglo, Surakarta (City) with a discussion of the effect of implementing an occupational safety and health management system on worker productivity which resulted in a very good percentage of OSH Management System implementation of 88.37%, then development is carried out with the aim of knowing the effect of implementing OSH Management Systemon project implementation time and costs. With data analysis using the Earned Value Method and field observations, several conclusions were obtained. Based on the application of OSH Management System and the results of calculations, it can be seen that the project runs faster than the planned time with a positive Schedule Variance (SV) value, that is: IDR 428,204,245 (positive) and a Schedule Performance Index (SPI) value of 3.857, but a deeper study is needed of the possibility of unrealistic plans. The budgeted costs incurred during the work in October-December 2022 are smaller (saving) than the planned budget or it can be said that the project is profitable with a Cost Variance (CV) value of IDR 76,941,045 and a Cost Performance Index (CPI) of 1.153. It can be concluded that the application of OSH Management System will affect the achievement of project performance.