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Montana Oversize Permits

Below is some important oversize permit regulation information for the state of Montana.

In Montana, you need an oversize permit if your vehicle exceeds 8’6″ wide, 14’0″ high, 75’0″ long or 80,000 pounds. 

If you need to apply for a Montana oversize permit, call (888) 737-6483 now or contact us. 

LEGAL DIMENSIONS & WEIGHTS​
Legal Width:8'6
Legal Height:14'0
Legal Length:-Single unit: 55'0
-Semi-trailer: 53'0
-Auto Transporter: 75'0
-Tractor/Truck w/Semi-trailer: 75'0
Legal Overhang Front:3'0 (auto/boat trans only)
Legal Weight Gross:80,000
Legal Overhang Rear:4'0 (auto/boat trans only)
Legal Trailer Length:53’0
Legal Kingpin:N/A
Legal Weight Single:20,000 lbs.
Legal Weight Tandem:34,000 lbs.
Legal Weight Tridem:42,000 lbs.
Legal Weight Quad:N/A
Legal Weight Doubles:34,000 lbs.
Legal Weight Triples:42,000 lbs.
Load Exemptions:
PERMIT FEES​
Permit Fee/Legal Weight:$10.00
Permit Fee/Overweight:Refer to Axle Weight Fee link below
Superload Fees:N/A
Mileage Fees:Refer to Axle Weight Fee link below
Annual Fees:-Oversize: $75.00
-Overlength Double Combination: $125.00
-Non-divisble (length only): $125.00
Additional Fees:N/A
AGENCY GENERAL INFO​
Phone:406-444-6130
Email:
Status Phone:406-444-6130
Website:https://www.mdt.mt.gov/
Hours of Operation:7:30 am - 5:00 pm Central
Permit Valid For: 5 Days

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