If your mailing or business address has changed, you have a responsibility to let the WSIB know so you don’t miss important mail.
Most businesses can update their mailing address online; however, if you need to change an international address, another type of address (e.g. payroll address), or your business has multiple branch locations, please call us at 1-800-387-0750. We’re available Monday to Friday from 7:30 a.m. to 5:00 p.m.