1. Short title This Act may be cited as the Tax Cuts and Jobs Middle Class Enhancement Act . 2. Exclusion of 2018 bonuses from gross income (a) In general Gross income shall not include amounts received by an individual as a bonus after December 22, 2017, and before January 1, 2019. (b) Limitation The amount of gain excluded from gross income under subsection (a) with respect to an individual shall not exceed $5,000. (c) Bonus defined For purposes of this section, the term bonus means amounts paid to an employee other than amounts obligated under an employment contract. 3. Certain provisions of Public Law 115–97 made permanent Any provision of subtitle A or B of Public Law 115–97 , or any amendment made by such a provision, that terminates on December 31, 2025, shall not terminate on such date. 4. Increase in standard deduction (a) In general Section 63(c)(7) of the Internal Revenue Code of 1986 is amended— (1) in subparagraph (A), by striking and at the end of clause (i), by striking $12,000 in clause (ii) and inserting $13,000 , by striking the period at the end of clause (ii) and inserting , and , and by adding at the end the following new clause: (iii) by substituting $26,000 for 200 percent of the dollar amount in effect under subparagraph (C) for the taxable year , and (2) in subparagraph (B)(ii), by striking the $18,000 and $12,000 amounts and inserting the dollar amounts . (b) Effective date The amendments made by this section shall take effect as if included in the enactment of section 11021 of Public Law 115–97 . 5. Reduction in medical expense deduction floor (a) In general Section 213 of the Internal Revenue Code of 1986 is amended— (1) in subsection (a), by striking 10 percent and inserting 7.5 percent , and (2) by striking subsection (f). (b) Minimum tax preference not To apply Section 56(b)(1) is amended by striking subparagraph (B). (c) Effective date The amendments made by this section shall take effect as if included in the enactment of section 11027 of Public Law 115–97 . 6. Increase in