; plus (ii) $150,000 for each congressional district in the State with respect to which the candidate is seeking election; or (B) the amount determined by the Commission under section 531. (2) Indexing In each even-numbered year after 2021— (A) each dollar amount under paragraph (1)(A) shall be increased by the percent difference between the price index (as defined in section 315(c)(2)(A)) for the 12 months preceding the beginning of such calendar year and the price index for calendar year 2020; (B) each dollar amount so increased shall remain in effect for the 2-year period beginning on the first day following the date of the last general election in the year preceding the year in which the amount is increased and ending on the date of the next general election; and (C) if any amount after adjustment under subparagraph (A) is not a multiple of $100, such amount shall be rounded to the nearest multiple of $100. 523. Matching payments for qualified small dollar contributions (a) In general The Commission shall pay to each participating candidate an amount equal to 600 percent of the amount of qualified small dollar contributions received by the candidate from individuals who are residents of the State in which such participating candidate is seeking election after the date on which such candidate is certified under section 515. (b) Limitation The aggregate payments under subsection (a) with respect to any candidate shall not exceed the greater of— (1) 400 percent of the allocation such candidate is entitled to receive for such election under section 522 (determined without regard to subsection (c)(5) thereof)