US President-elect Donald Trump pumped a total of $66 million of his own money into his campaign - far from the $US100 million he frequently boasted he was going to spend.

Trump-related business industries - those bearing his own name, including his private jet and the Manhattan building that served as his campaign headquarters - received $US11 million in payments from his campaign.

Trump shocked the political world when he defeated Democratic rival Hillary Clinton in the November 8 election for the White House, overcoming a spending deficit and outperforming polls in several swing states to propel him to victory.

Earlier this week, Trump's campaign revealed that he sold his entire stock portfolio in June, a holding that was estimated at about $US40 million.
The move to sell his stocks came weeks after he forgave about $US47 million in loans he had already given his campaign.

In total, Trump raised $US339 million and spent $US322 million - a far cry from the $US565 million spent by Clinton, according to the latest Federal Election Commission disclosure reports.

Trump spent $US94 million in the final days of the campaign, compared with the $US132 million spent by Clinton.

In total, Trump spent $US107 million on advertising, including television ads, and another $US85 million in digital and online advertising.

His second largest expense was air travel, totalling $US26 million and accounting for more campaign spending than his payroll.