The sector has already stepped up restructuring programmes, reduced headcount by about 15,000 since mid-2011 and has announced another 25,000 job cuts.
According to a report issued by the consultancy firm, these cuts will take a year or two to fully translate into improved profits. A further 40,000 jobs could be on the line in the next few years.
"Restructuring will need to a move from tactical reductions to more radical redesign and refocusing," said Markus Boehme, senior partner at Roland Berger Strategy.
"Most efforts have been focused on increasing productivity, with very little capacity exiting, but we are now seeing a change."
According to its estimates, global investment banks have improved their performance over recent months but structural problems persist.
Investment banks generated third quarter revenues of about Rs 4.2 lakh crore (Rs 4.2 trillion), up sharply compared to the depressed third quarter of 2011. Full year 2012 revenues are expected to grow around 10 per cent to Rs 17.5 lakh crore (Rs 17.5 trillion), although downside
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