All Washington employers must provide paid family and medical leave under a bill signed by Gov. Jay Inslee on July 5. 

The new law creates an insurance fund that employers and employees both pay into, with a 0.4 percent payroll tax. Payroll deductions will begin on Jan. 1, 2019, and benefits will become available to employees on Jan. 1, 2020.  https://www.paidleave.wa.gov/