# ON-05 — WSIB general registration. Most Ontario businesses with employees

**Flag: Current** — Verified against the live source. Safe to cite.

**WSIB general registration.** Most Ontario businesses with employees, including family members and subcontractors, must register. **Ten calendar days from hiring the first employee.** Mandatory industries include construction, restaurants and bars, sales and services, agriculture, manufacturing, trucking and transportation. Non-construction business owners are not automatically covered but may buy optional insurance

## Sources

- How to register (primary): https://www.wsib.ca/en/howtoregister

Jurisdiction: ON · Verified 2026-08-27 · Review: legislative