Ontario OS/OW Permit Requirements

• Height
  Height exceeds 4.15 m (13.6 ft) — permit required
• Width
  Width exceeds 2.6 m (8.5 ft) — permit required
• Length
  Length exceeds 23.0 m (75.5 ft) — permit required
• Weight
  GVW exceeds 63,500 kg (140,000 lbs) — overweight permit required
• Width
  Width exceeds 5.0 m (16.4 ft) — Annual Oversize route survey required
• Height
  Height exceeds 5.0 m (16.4 ft) — route survey required
• Weight
  GVW exceeds 140,000 kg (308,650 lbs) — OSOW Level 3 engineering review

Single-trip C$120; Annual Oversize Permit C$500. Annual Overweight C$1,000+ by axle config. Engineering reviews for superloads (>5 m wide, >63,500 kg) start at C$1,000–C$5,000 via MTO Bridge Office.

• Official permit portal
• Official fee schedule
• Ontario MTO — Get an Oversize/Overweight Permit
• Ontario Trucking Portal (OTP)
• Ontario Highway Traffic Act — Size & Weight
• Ontario OSOW Permit Guide
• Ontario OSOW Application Forms
• Ontario MTO Carrier Contacts

Reference information last verified May 2026. Always confirm current requirements with Ontario MTO — Carrier Services and Enforcement Branch.