The Postgraduate Department of Commerce is one of the oldest Departments of Newman College which started in 1964. The Department offers course since 1980 and it was elevated as PG Department in 1995. Currently the Department offers two programmes viz., B.Com (Finance and Taxation) and M.Com (Financial Management). Since its inception the Department has contributed substantially to the development of commerce education in Kerala especially in Idukki District. The Department creates stimulating environment for the academic growth of its students. Apart from the curricular activities, the Department provides environment to improve their professional expertise, work ethics and leadership skills. The Department has organized national level conferences and inter-collegiate competitions for the researchers and students across the country.

The faculty of the Department is known for their expertise and imparts practical knowledge on the subjects. The department has faculty strength of 9 (Aided), of which 3 have PhD and 3 have M.Phil as their highest qualification.  Debates, panel discussions, quizzes, Union budget analysis, industrial visits and paper presentations are organized regularly to enhance the skills of students. The faculty of Commerce Department has undertaken various major and minor research projects funded by UGC. Currently, One major project and Three minor projects are ongoing. The vital presence of academic writings in the department is reflected by many published works. The faculty has authored many books and published research papers in journals of national and international repute.  Trade Wind(ISSN 2320-5393), started in the year 2004, is the annual publication of the post-graduate Department of Commerce. The journal is standing at its 10th volume.  The journal is intended to promote research and debate in the area of commerce, business, management and legal practices. The journal is indexed at ISID of Indian Council of Social Science Research.