3 U.S. Code § 102 :
"The President shall receive in full for his services during the term for which he shall have been elected compensation in the aggregate amount of $400,000 a year, to be paid monthly, and in addition an expense allowance of $50,000 to assist in defraying expenses relating to or resulting from the discharge of his official duties. Any unused amount of such expense allowance shall revert to the Treasury pursuant to section 1552 of title 31, United States Code. No amount of such expense allowance shall be included in the gross income of the President. He shall be entitled also to the use of the furniture and other effects belonging to the United States and kept in the Executive Residence at the White House."
10/30/16: Trump announced he is leaving his businesses to focus on presidency. "I will be leaving my great business in total in order to fully focus on running the country in order to make America great again," he said in a series of early morning tweets. "While I am not mandated to do this under the law, I feel it is visually important, as president, to in no way have a conflict of interest with my various businesses."
12/24/16: President Elect Trump announced that he decided to dissolve his charitable Trump Foundation to avoid ‘even the appearance of any conflict with my role as President’. This was a smart move.
1/11/17: Donald Trump gives his hotel profits generated by foreign government payments to the U.S. Treasury (the American people) as part of a plan to avoid possible conflicts of interest
4/3/17: Trump donated his first-quarter salary ($100,000) to the National Park Service.
6/16/17: President Donald Trump outlined the financial health of the business assets he placed into a trust when he took office. The information comes in a new financial disclosure he voluntarily made to the Office of Government Ethics. The documents cover January 2016 through this June. The report showed Trump resigned from more than 500 positions, many of them a day before his inauguration as president. Trump listed at least $315 million in liabilities, about the same as in a report he filed last year.
7/27/17: President Donald Trump donated his second quarter salary ($100,000) to the Department of Education.