Disclosures to the Australian Electoral Commission annual returns,published on Monday,also show Victorian MP Gladys Liu donated $90,000 to her own campaign weeks before the May 18 poll.
Mr Palmer has claimed credit for Prime Minister Scott Morrison's election win,saying the scare campaign by his United Australia Party - which included a significant advertising blitz - was responsible for the swing against Labor.
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The businessman's company Mineralogy donated $83.6 million to the United Australia Party in 2018-19.
Mr Palmer's wife,Anna,also donated $330,000,according to the annual AEC disclosures.
His other company - Palmer Coolum Resort - contributed $103,499 to the party.
Meanwhile,the Liberal Party's Victorian branch has declared a $90,000 donation from Ms Liu,whichthe Hong-Kong born MP tried to claim late last year was a loan.