1. (1) An employer that orders a business closing or mass layoff without providing a notice required by RCW 49.45.020 is liable to each aggrieved employee who suffers an employment loss because of the closing or layoff for:

   1. (a) Back pay for each day of violation not less than the higher of:

      1. (i) The average regular rate of compensation received by the employee during the last three years of the employee's employment; or
      2. (ii) The employee's final rate of compensation; and
   2. (b) The value of the cost of any benefits to which the employee would have been entitled had their employment not been lost, including the cost of any medical expenses incurred by the employee that would have been covered under an employee benefit plan.
2. (2) Liability under this section must be calculated for the period of the employer's violation up to a maximum of 60 days.

3. (3) The amount for which an employer is liable under this section must be reduced by:

   1. (a) Any wages paid by the employer to the employee during the period of the violation;
   2. (b) Any voluntary and unconditional payment by the employer to the employee that is not required by any legal obligation;
   3. (c) The amount paid to the employee pursuant to the federal worker adjustment and retraining notification act, 29 U.S.C. Sec. 2101 et seq.; and
   4. (d) Any payment by the employer to a third party or trustee, such as premiums for health benefits or payments to a defined contribution pension plan, on behalf and attributable to the employee for the period of the violation.

4. (4)

   1. (a) The department, an aggrieved employee, or the bargaining representative of the aggrieved employee may bring a civil action on behalf of the person, other persons similarly situated, or both, in any court of competent jurisdiction within three years of the alleged violation. The court may award reasonable attorneys' fees as part of costs to any plaintiff who prevails in a civil action brought under this chapter.
   2. (b) If the court determines that an employer conducted a reasonable investigation in good faith and had reasonable grounds to believe that its conduct was not a violation of this chapter, the court may reduce the amount of any penalty it would otherwise impose against the employer under this chapter.
   3. (c) This chapter does not grant any court the authority to enjoin a mass layoff or business closing.

[ 2025 c 277 s 4.]