Turnbull donated $1.75m to Liberal Party

Malcolm Turnbull has revealed he donated $1.75 million to the cash-strapped Liberal Party during the 2016 federal election campaign.

Confirming the figure for the first time on Wednesday night, the prime minister said he had always been financially generous with causes he and wife Lucy believed in.

"I've always been prepared to put my money where my mouth is," he told the ABC's 7.30 program.