WHAT IS WSIB: The Workplace Safety and Insurance Board (WSIB) is an independent provincial agency which provides compensation and insurance for Ontario workplaces. WHO NEEDS TO REGISTER WITH WSIB: You need to register with WSIB if you are in/have following businesses: construction business restaurant or bar sales and services, agriculture or manufacturing business trucking or transportation business homeowner or private hiring a domestic employee, babysitter, nanny, cook, gar