President Obama and the first lady reported a combined income of $436,065 on their 2015 tax returns, nearly a 10 percent dip from the previous year and the lowest amount since the president took office.

The Obamas paid $81,472 in taxes, for a federal tax rate of 18.7 percent, the White House reported Friday in its annual disclosure. The federal income tax filing deadline is Monday.

The first family made about $41,000 more in 2014, but the Obamas' income has fallen since peaking early in his tenure at $5.5 million, buoyed by earnings from his two books, "Dreams From My Father" and "Audacity of Hope."

This year, the Obamas reported donating $64,066 to 34 charities, including the largest gift of $9,066 to the Fisher House Foundation, which offers low-cost housing to military families during illness, disease or injury.

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Vice President Biden and his wife, Jill, reported a combined income of $392,233, and paid $91,546 in federal taxes, for an effective tax rate of 23.3 percent, the White House said.