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New Hampshire trucking rules

Fees, CDL costs, weight and size limits, chain laws and new bills for truckers and trucking companies in New Hampshire. Updated 2026-10-22.

Must-know rules · Weight, oversize & chains · Fees · Bills

Must-know rules

New Hampshire's most useful rules for truckers are in the weight statutes. Vehicles with additional registration and certification can run up to 99,000 lb on some routes, but that certification can't be combined with an NHDOT oversize/overweight permit. Spring-thaw road postings, strict anti-idling limits that vary by temperature, and a handheld-phone ban that also applies when stopped in traffic are the other things to watch.

Researched by our AI agent from the linked sources on 2026-10-21. Always confirm with the source.

• Must knowWeight limits: general highways

  Statutory maximums include 33,400 lb for a 2-axle vehicle. A truck-tractor with a semi-trailer on 5 or more axles, or a truck-tractor with more than one trailing unit, is capped at 80,000 lb including enforcement tolerances. Axle limits are 22,400 lb for a single axle and 36,000 lb for a tandem.

  NH RSA 266:18-a Weight on Non-Interstate and General Highway System
• Must knowIdling limits

  The limit applies to motor vehicles, and the sources do not exempt trucks. Above 32°F, idle no more than 5 consecutive minutes in any 60. Between -10°F and 32°F, the limit is 15 minutes in any 60. Below -10°F there is no time limit as long as no nuisance is created. Exemptions include running a mechanic's diagnostics and defrosting a windshield for safety. A sleeper-cab rest exemption is not shown in the excerpt I saw.

  NH Env-A 1100 Mobile Source Air Pollution (Env-A 1102.02/1102.03)

Weight limits, oversize permits and chain laws

Our agent is still researching New Hampshire's weight, size and chain rules. Check back soon.

Fees and DOT requirements

New Hampshire charges a flat $60 for a Class A or Class B CDL. Truck registration is figured by gross weight at a per-100-lb rate, plus a separate local permit fee. I found no official source on state operating authority for for-hire freight carriers, so that item is unresolved.

Class B CDL

$60 for 5 years (about $12 a year)
Endorsements cost $10 each and are added to the base fee. The CLP fee and retest fees are the same third-party, unverified figures as for Class A. The 5-year term comes from a City of Nashua page, which says licenses renew every 5 years on the licensee's birthdate (https://www.nashuanh.gov/443/Drive Source

Class A CDL

$60 for 5 years (about $12 a year)
Endorsements cost $10 each (for example T doubles/triples, P passenger, S school bus) and are added to the base fee. A third-party summary, not the official page, lists a $20 CLP fee. It also lists $20 retests for the general knowledge, combination and road skills tests, and $10 for air brakes (http Source

How registration is figured

By gross weight. Trucks from 8,001 to 73,280 lb pay $1.06 per hundred lb of gross weight. For truck-tractors, gross weight includes the tractor, the heaviest semi-trailer used and the maximum load. The rate is $1.06 per 100 lb up to 73,280 lb and $1.58 per 100 lb over 73,280 lb. Each additional semi
The statute gives per-100-lb rates, not a dollar total for these two weights, so both fees are null. The statute text I retrieved does not make clear how fractions of 100 lb are rounded. It is also unclear whether the $1.58 rate applies only to the pounds above 73,280 or to the whole weight. Confirm with the DMV before budgeting. The municipal and state registration fees are based on original fact Source

Intrastate operating authority

Not determined for freight carriers. For passenger carriers, a certificate or permit from the Department of Safety (RSA . not determined, depends on the type of operation; see source.
I could not find an official source saying whether for-hire freight carriers operating only inside NH need state authority, or what it costs. The state rules I found cover passengers only. RSA 376:4 bars operating as a common carrier of passengers between points in the state without a certificate from the department. Under Saf-C 4500, filing a certificate of insurance or indemnity bond with the bu Source

State DOT requirements

• Must knowIFTA fuel tax license (interstate trucks)

  Special-fuel vehicles over 26,000 lb registered weight, or with 3 or more axles, that also travel in another IFTA jurisdiction must meet IFTA licensing and reporting rules. Licenses expire December 31 each year and cost $10 per vehicle.

  RSA 260:52 Road Toll on Users of Special Fuel

See all 7 DOT requirements with full access

Fees change; confirm with the linked state source. Compare all states.

New New Hampshire trucking bills

No new trucking bills found here recently. The agent checks every morning.