A report at the link below says Uncles Sam is going for the gold, too: up to $9,900 per Olympic gold medal!
Michael Phelps swims fast, but not fast enough to beat Uncle Sam, who awaits him at the finish line each time he wins a medal.
His total income tax bill for the 2016 Games? Up to about $55,000 for his five golds and one silver.
Full report here.