Gillnet is one of the fishing gear used by fishermen in the District of Cilamaya Wetan, Karawang Regency. This study aims to analyze financial feasibility of fishing efforts at sea using gillnet and analyze the level of welfare of fishermen in the District of Cilamaya Wetan, Karawang Regency. This research was conducted using the case study methods and the methods of sampling use purposive sampling. The results indicated that analysis of fishing efforts at sea using gillnet in the district of Cilamaya Wetan, Karawang Regency are the profit value of IDR. 50,433,333 / year, profitability 59.64%, R/C 1.60, payback period 4.6 months, the fishing business using gillnet in the District of Cilamaya Wetan, Karawang Regency is feasible to be developed. Monthly income of IDR. 4,202,777