This study aimed to estimate the economic benefits of the mangrove ecosystem resulting from coastal rehabilitation efforts in the coastal area of Karawang Regency, West Java Province, Indonesia. The estimation results are crucial for convincing stakeholders, including the government, that the budget allocated for coastal rehabilitation will provide significant benefits for human well-being and the sustainability of coastal ecosystems. The study employed an economic valuation analysis method, focusing on the three areas most severely affected by coastal erosion in Karawang Regency. The results showed that the total annual economic benefit from mangrove planting as part of coastal rehabilitation in these areas amounted to IDR 4,257,468,324,946. These findings are intended to support efforts to achieve the Sustainable Development Goals (SDGs).