1. Short title This Act may be cited as the Grow American Incomes Now Act of 2017 or the GAIN Act of 2017 . 2. Modification of earned income tax credit (a) In general (1) Increase in credit percentage The table in section 32(b)(1) of the Internal Revenue Code of 1986 is amended— (A) by striking 7.65 in the second column (relating to credit percentage) and inserting 30 ; (B) by striking 7.65 in the third column (relating to phaseout percentage) and inserting 15.98 ; (C) by striking 34 and inserting 65.28 ; (D) by striking 40 and inserting 76.80