"We will take a final decision after discussions with the Congress High Command. The decision will be disclosed at the appropriate time," Mukherjee told a press conference.
He, however, said the Congress would extend all support to the new government.
"I congratulate Mamata Banerjee for this fantastic win. It is a very big achievement to defeat CPI(M) within just 13 years of forming her party. It is her victory," the Union Finance Minister said.
"The people have shown faith in her and we hope that she will bring about fiscal restructuring, peace and uphold democratic norms in the next five years and we will cooperate with her through all means," he said.