Rates by type (2026/27 schedule (published 29 June 2026))
| Type | Licence fee per 100 kg | MII class |
|---|---|---|
| Trailer (box, boat, car trailer) | $14.88 | Class 6 — $18.35 |
| Caravan (trailer type) | $7.44 | Class 6 — $18.35 |
| Caravan (motor propelled / motorhome) | $29.76 | Vehicle class applies |
Worked example: a 750 kg box trailer rounds to 800 kg → $14.88 × 8 = $119.04, plus flat fee, recording fee and MII ≈ $153.69 for 12 months. Run your own weight through the calculator.
First-time licensing: inspection + plates
New-to-WA trailers and caravans — bought interstate, homemade, or never licensed — need a roadworthiness inspection at an Authorised Inspection Station before the licence issues, plus a weighbridge certificate if the tare can't be verified from specs or records. Once licensed, WA trailer plates are issued for the rear. Moving an unlicensed trailer to the inspection legally requires a temporary movement permit.
Frequently asked questions
How much is trailer rego in WA?
Trailers pay $14.88 per 100 kg of tare weight (rounded up) plus the flat fee, $9.70 recording fee and just $18.35 Class 6 MII. A 750 kg box trailer lands around $154 for 12 months.
Is caravan rego cheaper than trailer rego?
Trailer-type caravans get the lowest rate in the schedule — $7.44 per 100 kg, half the standard trailer rate — with the same $18.35 MII. Motor-propelled caravans (motorhomes) pay the full $29.76/100 kg car rate.
Does a new trailer need an inspection?
Trailers and caravans being licensed in WA for the first time (including homemade and interstate ones) need a roadworthiness inspection at an Authorised Inspection Station before the licence issues, and receive WA trailer plates.
Do I need a weighbridge certificate?
Only if the tare weight can't be verified from manufacturer specs, previous licence documents or DoT records — common with homemade trailers. Public weighbridges issue the certificate.