The average federal income tax rate is just over 14%.
Biden and his wife, Jill, a teacher, earned $607,336 last year while he was running for president.
Biden's predecessor, Donald Trump, declined to release his tax returns, a precedent that the new administration rejected.
They paid a rate of 36.7% on income of $1,695,225 and contributed $27,006 to charity.
Biden campaigned on the transparency of his personal finances, releasing 22 years' worth of tax filings ahead of the 2020 election.
IRS figures indicate that the average tax filer paid roughly $12,200 in 2017, about 16 times more than what the former president paid.
“You have not released a single solitary year of your tax returns,” Biden told Trump at one of their presidential debates. »