NEW DELHI (AFP) - India's finance minister heads to Canada and the United States this weekend to seek investment to plug a gaping hole in public finances and raise money to overhaul the nation's crumbling infrastructure.

The investment roadshows, which kick off in Toronto on Monday, are the final leg of Finance Minister P Chidambaram's tour which began in January of major global financial hubs that included Japan, Hong Hong, Germany and Singapore.

Mr Chidambaram - a veteran politician mentioned as a potential prime minister if the embattled ruling Congress party wins the 2014 elections - is being accompanied by top finance ministry and central bank officials.

"This is a very important trip to attract investment," a senior government official, who did not wish to be named, told AFP on Saturday.

"He will interact with top business leaders, pension, insurance and sovereign wealth funds and his government counterparts, talking about what India is doing to increase investment and speed up infrastructure projects," the official said.

Mr Chidambaram, reappointed to the finance job last year to revive India's stumbling economy, was slated to leave on Sunday on his tour that will also take him to Ottawa, New York and Boston, a finance ministry statement late on Saturday said.

His trip comes as Asia's third-largest economy faces the biggest fall in direct foreign investment (FDI) in over a decade amid waning global risk appetite and domestic growth at a decade-low level that makes India a tough sell.

The FDI slide leaves India dependent on volatile foreign flows into stocks and bonds, that are far more prone to dry up in the event of economic crisis, to fund a record current account deficit.

"The (deterioration in the) quality of flows is concerning," Nomura economist Sonal Varma said in an investors' note.

India's current account deficit hit US$32.6 billion (S$40.3 billion) in the December quarter or 6.7 per cent of gross domestic product (GDP), due to high gold and oil imports and weak exports - far above the central bank's comfort level of 2.5 per cent of GDP.

The public finances crunch has prompted the government to move more aggressively to seek foreign investment.

Mr Chidambaram, who will finish his trip in Washington where he will attend IMF-World Bank meetings, recently loosened debt market rules to draw more overseas investment to fund the current account deficit and to finance a planned US$1 trillion in projects to overhaul shabby roads, ports and other infrastructure.

Last September, the government also initiated a string of liberalisation measures to widen foreign investor access to sectors such as retail, insurance and aviation.

There are now reports the government may also hike foreign investments caps in telecoms and defence production and Mr Chidambaram has promised a "next generation" of reforms to further pry open the still heavily regulated economy.