His reelection committee entered October with a stockpile of more than $35 million, the campaign said.
The figures are expected to be reported in new Federal Election Commission records due to be filed Monday night.
No other president dating back to at least Ronald Reagan had raised as much money as Trump at this point in his first term, according to the Campaign Finance Institute, a nonpartisan research group.
Unlike his predecessors, Trump began fundraising for his reelection shortly after his 2016 win.
Trump continues to be buoyed by an avid small donor base. According to his campaign, 98 percent of the total raised last quarter came from donations of $200 or less.