Overweight Certification
What you need to know regarding overweight certification.
For vehicles or a combination of vehicles that choose to haul additional weight exceeding the limitations of RSA 266:18, motor carriers must complete New Hampshire's overweight certification process. This certification is a supplement to the legal registration and must be carried in the vehicle at all times.
How to Apply:
To certify your truck and/or trailer for overweight, a Certification for Additional Truck Weights form must be completed by the manufacturer or authorized agent (dealership) or a line sheet from the manufacturer must be attached to the application. Forms may be mailed to you by contacting the Registration Bureau at (603) 227-4100, or reg@dos.nh.gov.
Please bring in the completed Certification for Additional Truck Weight form, and the original or a photocopy of the current valid registration from the jurisdiction in which the vehicle is registered, along with a copy of the previous overweight certification from the prior year (if applicable) to one of our motor vehicle offices by making an appointment or mail this information to:
NH Dept. of Safety
Division of Motor Vehicles
ATTN: Registration Bureau
23 Hazen Drive
Concord NH 03305
Fees:
Please note that fees are for power units only. There is no charge for trailers.
| Number of Axles (vehicle examples) |
Legal Registered Weight | Certified Weight | $105.00 certification fee plus monthly fee: |
|---|---|---|---|
| 2 (moving vans, box trucks) |
33,400 lbs. | 37,400 lbs. | $3.20 |
| 3 (dump, logging, flatbeds) |
55,000 lbs. | 65,000 lbs. | $8.00 |
| 4 (dump, logging, flatbeds) |
60,000 lbs. | 73,000 lbs. | $10.40 |
| 5 (tractor trailer combo) |
80,000 lbs. | 84,000 lbs. | $4.80 |
| 6 (tractor trailer combo) |
80,000 lbs. | 99,000 lbs. | $22.80 |
Placement Of Decals
- Some jurisdictions do not allow our overweight decals to be placed on their license plates, so as a result, the overweight decals for both out-of-state trucks and trailers are to remain attached to the paperwork and shown with credentials when pulled over by law enforcement.
- Overweight decals for power units based in New Hampshire are to be displayed on the front plate, underneath the year decal.
- Overweight decals for trailers are to be displayed on the trailer plate underneath the year decal.
- If the overweight decal does not fit horizontally, then it may be placed vertically.