President Barack Obama and his wife, Michelle, reported adjusted gross income of $481,098 for 2013, down 21 percent from last year, according to tax returns released by the White House.

The Obamas paid $98,169 in federal taxes, including $2,310 imposed by the 2010 Affordable Care Act that he signed. That’s an effective income tax rate of 20.4 percent.

“In 2013, as a result of his policies, the president was subject to limitations in tax preferences, as well as additional Medicare and investment income taxes, for high-income earners,” Press Secretary Jay Carney said in a blog post on the White House website.

The Obamas aren’t affected by the higher marginal tax rates that took effect in 2013, because their taxable income is less than $450,000.

The Obamas donated $59,251 to charity in 2013, down from $150,034 the year before.

The Obamas’ return is “pretty sterile,” said Anthony Nitti, a partner at Withum, Smith + Brown PC in Aspen, Colorado.

“There’s decent-sized dollar amounts, but it’s a very, very basic return,” he said.

As Obama’s book sales have declined, so has his income. The president made less in 2013 than he did in any year since 2004, the year he gave the speech at the Democratic National Convention that made him a national figure.

The White House also released the 2013 tax returns for Vice President Joe Biden and his wife, Jill.

The Bidens reported adjusted gross income of $407,009, the most since at least 1997. The Bidens paid $96,378 in taxes, including $1,497 because of the Obamacare increases, for a tax rate of 23.7 percent.

The Bidens donated $20,523 to charity.