The capex is part of respective medium-term strategies of the different companies covering all the business sectors of the group, ranging from engineering, materials, information technology and communications, consumer products, services, energy to chemicals.
The majority of the investments will be by the group's top companies, Tata Steel, Tata Motors and Tata Consultancy Services (TCS).
While Tata Steel would have a capex of nearly Rs 16,500 crore in FY15, Tata Motors has earmarked around Rs 38,500 crore, of which Rs 35,000 crore will be for its British arm JLR and Rs 3,500 crore for its operations in India.
The group's information technology major TCS has outlined a capex of Rs 4,000 crore for this fiscal.
The spends are focused on already planned new products and services as well as continuing development of new technologies and both for global and domestic operations.
When contacted, a Tata Sons spokesperson said capital expenditure plans of group firms "are available, wherever so declared, in their individual financial and business related announcements".
"Tata companies always take a long-term view of business and make required investments, depending on the needs of the geography concerned and company imperatives, on new products and services, research and technology development, and establishment or expansion of facilities and business enablers. We are, in general, optimistic about emerging trends," the spokesperson added.