The biggest recipient was the Fisher House Foundation, which supports families of veterans and received $392,000 from the former commander in chief from 2009 to 2015. That money appears to have come from sales of Obama’s children’s book  Of Thee I Sing . Just before entering the White House, Obama finished a manuscript for the book, which he published with Random House. Obama pledged to donate all of his post-tax proceeds from the book to the Fisher House Foundation to support a scholarship fund for children of wounded and fallen soldiers.

He gave away $190,000 more to children’s causes, including $48,000 to Boys & Girls Clubs. He also gave away $19,500 to the Mosaic Youth Theatre of Detroit. Another $13,500 went to the Christopher House, a Chicago-based group that supports poor working families. Even after he moved to Washington, Obama remained loyal to his Chicago roots. He poured $11,500 into the Midtown Educational Foundation, which offers enrichment programs to poor urban youth in the Windy City, and he gave $20,500 to two groups fighting hunger in Illinois.

President Obama handed out his own money after national tragedies. He gave $2,000 to a fund for families affected by the Boston bombing in 2013 and another $2,000 to the Sandy Hook Promise Foundation, which promotes gun control, three years after a shooter terrorized Sandy Hook Elementary School in 2012.

Obama gave $5,000 to the Beau Biden Foundation, which supports children’s causes, in 2015, the same year former Vice President Joe Biden’s son, Beau, passed away.

President Obama also more than  doubled  that charitable total by also donating the entire $1.4 million he received as the winner of the 2009 Nobel Peace Prize to ten different organizations:

– $250,000 to Fisher House, a national nonprofit organization providing accommodation for families of patients receiving medical care at military and Department of Veterans Affairs medical centers.

– $200,000 to the Clinton-Bush Haiti Fund, which was set up in the aftermath of the Haitian earthquake to help survivors.

– $125,000 to College Summit, a national nonprofit organization to increase college enrollment rates.

– $125,000 to the Posse Foundation, which awards scholarships to promising public high school students.

– $125,000 to the United Negro College Fund.

– $125,000 to the Hispanic Scholarship Fund.

_ $125,000 to the American Indian College Fund.

– $125,000 to the Appalachian Leadership and Education Foundation.

– $100,000 to AfriCare, which promotes health, food security and access to water primarily in Africa.

– $100,000 to the Central Asia Institute, which promotes education and literacy, especially for girls, in remote regions of Pakistan and Afghanistan.

Taken together, all those donations represented more than 78% of the total salary President Obama was paid during his time in the White House.

Although President Obama’s donations may have amounted to a lesser percentage of his presidential salary than the 100% President Trump is projected to donate over the course of his presidency, the comparison is a lopsided one unless one takes into account that Trump entered office with a reported net worth in the multi-billions, while the Obamas’ combined wealth was a bare fraction of that. Trump didn’t need his presidential salary, and he said as much — before Trump took office, the only presidents who had donated their entire salaries were John F. Kennedy and Herbert Hoover, both of whom were also independently wealthy.

NOW … LET'S DO THE ACCOUNTANT WORK.

"If I'm elected president, I'm accepting no salary."

Sources:
Actually, for TAX PURPOSES … TRUMP DOES TAKE HIS SALARY … THEN DONATES IT. But, he then gets to CLAIM THE DONATION AGAINST HIS OVERALL INCOME. That means it costs the U.S. Treasury THE AMOUNT OF THE SALARY PLUS WHAT IS DEDUCTED FROM HIS OVERALL TAX LIABILITY.
So, in doing so, Trump costs the government $400,000 plus what lower amount it collects from his taxes.
In fairness, kudos for his donation … and bullshit on "I'm accepting no salary."
Fair-is-fair.