Summers, director of the National Economic Council, said the government could recoup "most, if not all" of the $50 billion investment it has made in GM to help pull it through a prolonged industry-wide slump, the Detroit Free Press reported Wednesday.
GM went through bankruptcy last summer. When it emerged, the taxpayer's $50 billion investment was set up as government ownership of 61 percent of the company and about $6.7 billion in loans.
GM has paid back the loans. Earlier assessments, however, consistently said it would take years for the company to repay the government the other $42 billion.
New estimates, however, estimate the company's initial public offering later this year would raise up $75 billion to $78 billion.
"The prospects of repayment are brighter than they were a year ago," Summers said at an economic forum at the Brookings Institute.