The top court dismissed a petition to disqualify the cricket hero as an MP, months after his rival, former Prime Minister Nawaz Sharif, was removed from parliament by the court on similar charges.
"No dishonesty or omission can be attributed to (Khan). This petition has no merits and is hereby dismissed," Chief Justice Saqib Nisar told the court.
The ruling on Khan was hailed as a vindication by his opposition party, Pakistan Tehreek-e-Insaf (PTI), which will face off against Sharif's ruling Pakistan Muslim League-Nawaz in elections next year.
Khan had led the legal drive that led to Sharif being disqualified in July over unreported income and the opening of a criminal corruption case against the former prime minister.
A lawmaker from Sharif's ruling party filed a separate complaint late last year alleging Khan and PTI secretary general Jahangir Tareen owned offshore companies and had not disclosed their assets.
The Supreme Court disqualified Tareen. "The respondent is declared not to be an honest person. He ceased to be member of the parliament. The respondent is disqualified," Nisar said of Tareen.
PTI spokesman Naeem Ul Haq said the party was disappointed with that judgement. Tareen himself was not immediately available for comment.
"I gave 60 documents to the Supreme Court ... Nawaz Sharif, took 300 billion rupees out of this country which he has to answer for ... and for that he produced only one document," Khan said at a press briefing after the verdict was announced.
A senior PML-N leader, Miftah Ismial, told Reuters the party questioned details of the court's ruling, but accepted it as final.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)