This study aims to apply the RothC model for predicting the carbon storage potential of Deciduous Broadleaf Forest (DBF) in Dak Lak province. The prediction results revealed that soil organic carbon of the DBF shows an increasing trend during the period of 2020 - 2050. The results of the prediction of organic components indicated that Humified Organic Mater (HUM) and Resistant Plant Material (RPM) are the main components of total soil organic matter in the DBF region. Decomposable Plant Material (DPM), Microbial Biomass (BIO), and Inert Organic Matter (IOM) account for smaller percentages. The different states of the DBF are projected to have approximately the same soil carbon storage levels. Specifically, the moderate DBF is predicted to store a soil organic amount of 70.42 tons per hectare. The poor DBF is forecasted to have an average organic amount of 70.37 tons per hectare. The very poor DBF is projected to store an amount of 72.15 tons per hectare. Forecasting of the DBF soil carbon storage potential is the basis for the assessment of the total organic carbon stock of the DBF ecosystem, as a basis for payment of local forest carbon storage service.