Kuppuswamy's socio economic status scale takes into account education, occupation and monthly family income. Since he is a post graduate he gets 6 points for education. His job as a clerk gives him 5 points and a monthly family income of 20000 Rs gives him 12 points which gives him a total of 23 points and so he belongs to upper middle socioeconomic class. Socio economic status Total score Upper socio economic status 26 - 29 Upper middle socioeconomic status 16 - 25 Lower middle socioeconomic status 11 - 15 Upper lower socioeconomic status 5 - 10 Lower socioeconomic status <5 Ref: Park, Edition 21, Page 639