To amend the Internal Revenue Code of 1986 to make permanent the credit for increasing research activities, to increase such credit for amounts paid or incurred for qualified research occurring in the United States, and to increase the domestic production activities deduction for the manufacture of property substantially all of the research and development of which occurred in the United States.

21st Century Investment Act of 201 7 This bill amends the Internal Revenue Code to: (1) modify the tax credit for increasing research activities to allow an increased 25% tax credit rate for expenses for research, substantially all of which occurs in the United States; and (2) increase to 15%, through 2024, the tax deduction for income attributable to domestic manufacturing production activities for which substantially all of the research and development occurred in the United States.