Wash. Rev. Code § 81.80.321
In addition to all other fees to be paid, a common carrier and contract carrier shall pay a regulatory fee of no more than 0.0025 of its gross income from intrastate operations for the previous calendar year, or such other period as the commission designates by rule. The carrier shall pay the fee no later than four months after the end of the appropriate period and shall include with the payment such information as the commission requires by rule.
The legislature intends that the fees collected under this chapter shall reasonably approximate the cost of supervising and regulating motor carriers subject to this chapter, and to that end the commission may by general order decrease fees provided in this section if it determines that the moneys then in the motor carrier account of the public service revolving fund and the fees currently to be paid will exceed the reasonable cost of supervising and regulating carriers.
Any payment of the fee imposed by this section made after its due date shall include a late fee of two percent of the amount due. Delinquent fees shall accrue interest at the rate of one percent per month.
All fees collected under any other provision of this chapter must be paid to the commission. The commission shall transmit the fees to the state treasurer within thirty days for deposit to the credit of the public service revolving fund.
RCW 81.80.321
Effective date-1993 c 97 ss 2, 3, and 7: "Sections 2, 3, and 7 of this act take effect January 1, 1994." [ 1993 c 97 s 8.]