Project control is an essential aspect of project management. The earned value method is one of the control methods available for use. This research aims to assess the extent of time and cost deviations in the Mayang-Kalisat-Ajung road improvement project in Jember Regency, utilizing the earned value method as an analytical tool. This research employs secondary data, such as the Cost Budget Plan (RAB), project schedule, and weekly or monthly project reports, to measure key indicators such as Actual Cost Work Performed (ACWP), Budgeted Cost of Work Scheduled (BCWS), and Budgeted Cost of Work Performed (BCWP), to identify deviations in project cost and schedule performance. This research employs a quantitative analysis method, utilizing Microsoft Project and Microsoft Excel software to generate metrics like the cost performance index (CPI) and schedule performance index (SPI). The research results show that the project experienced a time delay of -10.63% with a time realization of 89.37%, as well as cost overruns with an Estimate at Completion (EAC) value reaching Rp20,298,475,550.24. The CPI value during the research period was 0.90, indicating low-cost efficiency. The results show that the project experienced significant deviations in cost and time. The implications of this research provide important insights for improvements in the management of similar construction projects, emphasizing the evaluation of cost efficiency and timeliness using the earned value method to reduce the risk of delays and cost overruns in the future.