The emergence of information and communication technology (ICT) creates new means that permit interaction between employers and employees via apps and systems. The gig economy has arisen as a key theme in a recent independent review of modern employment practices. However, most of the existing literature focused on the implications of growth in these arrangements for workers and their families. Realizing the importance of the research on job involvement for Malaysian citizens specifically among B40 and M40 to opt for gig work is still largely unexplored, hence, this study aims to explore the factors influencing the involvement of a gig worker among B40 and M40 while examining the effect on the enhancement of the B40 and M40 segment’s socio-economic sustainability. Using a purposive sampling method, the data were collected through a survey among gig workers in Malaysia. A total of 1415 valid questionnaires were gathered from the gig workers in 14 states of Malaysia. Additionally, SPSS 28.0 was applied to test the hypotheses. The results indicated that circumstances, earnings, risk, prospects, and workload had a positive relationship with the B40 and M40 socio-economic sustainability while flexibility is not significant toward B40 and M40 socio-economic sustainability. The result also shows that there is a significant difference between B40 and M40 income groups toward socio-economic sustainability. Findings from this study contributed new knowledge on the gig economy in Malaysia. The research also assists policymakers in understanding holistically the current job scenario of gig workers to formulate policies, incentives, and development programs.