NEW DELHI (Reuters) - A government amnesty targeting tax evasion in India has prompted tens of thousands of suspected tax dodgers to disclose nearly $10 billion in undeclared income, the finance minister said on Saturday.

The government of Prime Minister Narendra Modi sent out about 700,000 notices earlier this year to suspected evaders to coax them to declare hidden income and assets, known as "black money" in India, promising they would not be pursued by authorities if they came clean and paid a penalty.

Finance Minister Arun Jaitley told reporters the four-month scheme that closed on Friday had led to 64,275 declarations, resulting in a provisional 652.5 billion rupees ($9.8 billion) in undisclosed wealth.

Jaitley added the final figure would likely be higher. Factoring in taxes owed and penalties of 45 percent, the government could raise more than 293.6 billion rupees ($4.41 billion) from the declared income, according to Reuters calculations.

There was no public target for the initiative, but government officials had an internal goal to raise about $7.5 billion in back taxes.

During the 2014 elections, Modi pledged to bring back billions of dollars in "black money" if elected. Modi, in a tweet, called the outcome of the scheme "successful" and said it was "a great contribution toward transparency and growth of the economy."

In a country of 1.3 billion, fewer than 18,000 people declared annual income of 10 million rupees or more in 2012/13, the latest figures show.

(Reporting by Aditya Kalra; Editing by Helen Popper)