The plan is likely to be announced in the budget on Feb. 1 and could cost the government an additional 120 billion rupees ($1.44 billion), said two of the sources, all of whom declined to be named discussing a budget proposal.

It will build on an existing programme that Modi, who will be seeking a third term in elections due by May, announced before the last general election in 2019.

Under the "Pradhan Mantri Kisan Samman Nidhi" programme, the government transfers 6,000 rupees annually to both men and women farmers. It has so far disbursed more than 2.81 trillion rupees to more than 110 million farmers in 15 installments until last November, according to government estimates.

The plan to double the cash support and target it toward women has not been previously reported.

The agriculture ministry declined to comment while the finance ministry did not respond to an email seeking comment.

There are more than 260 million farmers in India and along with their families, they are a massive voting bloc in the country of 1.4 billion people. Women account for 60% of total farmers but less than 13% of them own the land they sow, according to government data.

One of the sources said expanding the financial support to women farmers would not have any significant impact on government finances since the amount will be relatively small in what is estimated to be a $550 billion budget.

Women have been a key support base for Modi and his Hindu nationalist Bharatiya Janata Party (BJP), which is widely expected to win the next election, according to opinion polls.

The party late last year handsomely won elections in three out of four major states, delivering better-than-expected results in states like Madhya Pradesh in central India with women overwhelmingly voted for it there.

In Madhya Pradesh, where the BJP government ran a cash transfer programme for married women, the party won about 51% of the female vote, compared with 46.2% of the male vote, according to pollster C-Voter.

($1 = 83.1476 Indian rupees)