5-year benefit cost rate
2 rules
For purposes of subparagraph (C) of subsection (c)(2), the 5-year benefit cost rate applicable to any State for any taxable year is that percentage obtained by dividing—
(A) one-fifth of the total of the compensation paid under the State unemployment compensation law during the 5-year period ending at the close of the second calendar year preceding such taxable year, by
(B) the total of the remuneration subject to contributions under the State unemployment compensation law with respect to the first calendar year preceding such taxable year.