The company said it made TWD 1.56bn ($51.57m) on a netbasis, from TWD 1.82bn in 2012.
Transport revenue declined to TWD 7.14bn from TWD 7.64bn.
Operating costs shrank to TWD 6.36bn from TWD 6.76bn.
Taiwanese bulker owner U-Ming has seen earnings eroded by falling revenue in 2013.
The company said it made TWD 1.56bn ($51.57m) on a netbasis, from TWD 1.82bn in 2012.
Transport revenue declined to TWD 7.14bn from TWD 7.64bn.
Operating costs shrank to TWD 6.36bn from TWD 6.76bn.