WA SB5525

Requires employers with 50+ employees to provide 60 days written notice before business closings or mass layoffs affecting 50+ workers, with notice going to affected employees, their union representatives, and the Employment Security Department

Employers violating notice requirements owe aggrieved employees back pay (at their highest rate from the last 3 years) plus the value of lost benefits for up to 60 days, and face civil penalties up to $500 per day for failing to notify the department

Exceptions to the 60-day notice requirement include: actively seeking capital that could prevent closure, unforeseeable business circumstances, natural disasters, and certain construction project employment

Prohibits employers from including employees currently on paid family or medical leave in a mass layoff order, except in cases of unforeseeable circumstances or natural disasters

Effective July 27, 2025; officially cited as the "securing timely notification and benefits for laid-off employees act"