The federal interest payment fund shall consist of contributions payable by each employer (except employers as described in RCW 50.44.010 and 50.44.030 who have properly elected to make payments in lieu of contributions, employers who are required to make payments in lieu of contributions, and employers paying contributions under RCW 50.44.035) for any calendar quarter which begins on or after January 1, 1984, and for which the commissioner determines that the department will have an outstanding balance of accruing federal interest at the end of the calendar quarter. The amount of wages subject to tax shall be determined according to RCW 50.24.010. The tax rate applicable to wages paid during the calendar quarter shall be determined by the commissioner and shall not exceed fifteen one-hundredths of one percent. In determining whether to require contributions as authorized by this section, the commissioner shall consider the current balance in the federal interest payment fund and the projected amount of interest which will be due and payable as of the following September 30. Except as appropriated for the fiscal biennium ending June 30, 1991, any excess moneys in the federal interest payment fund shall be retained in the fund for future interest payments.
Contributions under this section shall become due and be paid by each employer in accordance with such rules as the commissioner may prescribe and shall not be deducted, in whole or in part, from the remuneration of individuals in the employ of the employer. Any deduction in violation of this section is unlawful.
In the payment of any contributions under this section, a fractional part of a cent shall be disregarded unless it amounts to one-half cent or more, in which case it shall be increased to one cent.