The merger would create the country's fourth largest private sector bank.
Stocks of ING Vysya Bank surged 4.38 per cent to end at Rs 976.65 and Kotak Mahindra Bank rose by 3.64 per cent to settle at Rs 1,361 on the BSE.
"The scheme of amalgamation (of Kotak Mahindra Bank and ING Vysya Bank) shall come into effect from April 1, 2015," Kotak Mahindra Bank said in a statement quoting RBI approval. It got RBI approval for the merger yesterday.
The Rs 15,000-crore merger deal between Kotak Mahindra and ING Vysya received the Competition Commission's approval in February.