The main task of the Branch is preparation of Budget (Annual Financial Statement) and estimates of resources for five-year plans and annual plans, and managing the ways and means position of the State. For smooth functioning of this Branch, a few Cells have been formed. These are RIDF (Rural Infrastructure Development Fund) cell, Externally Aided Projects (EAP), Statistical Cell, PPP Cell and Record Cell.

The Statistical Cell in the Budget Branch of Finance Department was constituted with the objective to compile, tabulate and analyze the data/information received from the various sources like RBI, Planning Commission etc., to collect & compile all Central Finance Commission-related data on a yearly basis.

Government of West Bengal adopted a policy on the method of implementation of infrastructure projects in the state through PPP models, where Government and relevant private agencies would work in tandem to give shape to crucial infrastructure projects in the state.
The PPP Cell in this regard, was formed within the ambit of Budget Branch of Finance Department with Finance Secretary as Nodal Officer, to be adequately assisted by various knowledge experts relevant for PPP projects.