According to the returns, in 2015 the Clintons paid an effective federal income tax rate of 34.2 per cent and an effective state and local income tax rate of nine per cent for a combined federal, state and local effective tax rate of 43.2 per cent.
They donated 9.8 per cent of their adjusted gross income to charity.
"Hillary Clinton and Tim Kaine continue to set the standard for financial transparency as she releases her 2015 personal tax return and builds on the Clintons' tradition of making their returns public since 1977 and Kaine releases 10 years of his returns," said Hillary for America communications director Jennifer Palmieri.
"In stark contrast, Donald Trump is hiding behind fake excuses and backtracking on his previous promises to release his tax returns. He has failed to provide the public with the most basic financial information disclosed by every major candidate in the last 40 years. What is he trying to hide?" Palmieri said.