; and (2) by striking or account in paragraph (2). (b) Conforming amendments Section 408A(c)(2) is amended by adding at the end the following flush sentence: In applying this paragraph to an individual on whose behalf elective employer contributions are made to a simple retirement account, the amount described in subparagraph (A) shall be increased by the amount of elective employer contributions made on behalf of the individual to such account, except to the extent that such contributions exceed the applicable dollar amount (as defined in subsection (p)(2)(E)) or cause the elective deferrals (as defined in section 402(g)(3)) on behalf of such individual to exceed the limitation under section 402(g)(1) (taking into account subparagraph (C) thereof). . (c) Effective date The amendments made by this section shall apply to taxable years beginning after December 31, 2018. 311. Reduction in excise tax on certain accumulations in qualified retirement plans (a) In general Subsection (a) of section 4974 is amended by striking 50 percent and inserting 25 percent . (b) Effective date The amendment made by this section shall apply to taxable years beginning after December 31, 2018. 312. Clarification of catch-up contributions with respect to separate lines of business (a) In general Subparagraph (B) of section 414(v)(4) is amended— (1) by striking except that a plan and inserting “except that— (i) a plan ; (2) by striking the period at the end and inserting , and