Taking unjust and unlawful benefits of children’s labour for someone’s gain or gratification can be termed as economic exploitations in child labour. The study aimed to explore the prevalence of economic exploitations and their determinants among child labourers (CLs). Lalbagh, Hazaribagh, and Kamrangirchar sub-districts of Dhaka district were rationally chosen as the areas of the study. The study adopted a mixed-method design, where a proportional probability sampling was used. A list of 1753 CLs comprising 543, 587 and 626 from the selected study areas was prepared through a short enumeration survey and 324 CLs were interviewed systematically from the list to collect quantitative data using a face-to-face structured interview schedule. The study also collected qualitative data through 15 in-depth case interviews (five from each sub-district). Multivariate logistic regression was employed to determine the associated factors with the economic exploitations. Thematic analysis was followed, and then a concurrent technique was employed for data analysis. Results showed that 97% of the CLs were economically exploited. The multivariate logistic regression analysis identified that the socio-economic and occupational factors were significantly associated with these economic exploitations in different variables used in the study. On the other hand, the qualitative findings showed that the CLs were physically and verbally abused, engaged long working hours with less than minimum wage, involved in various hazardous jobs while hardly received treatment costs due to occupational injury. Finding would be an important guideline for the governmental and non-governmental organizations, policymakers, human rights workers and development practitioners in the related field.