State comparison · Updated October 2026
Maine vs. New Hampshire Driving Laws (2026)
Maine and New Hampshire differ on 6 of 9 rules we track: max speed limit, car insurance, car sales tax, car inspection, new resident deadline and helmet law.
Heading from Portland to Manchester takes you across the border, and 6 of the nine rules switch at the line. Main routes include I-95 on the Maine side and I-93 in New Hampshire; the capitals, Augusta and Concord, set the rules for each side.
The biggest gap: minimum coverage differs: 50/100/25 against 25/50/25. Drivers based in Lewiston who drive to Nashua, or the other way around, live under both sets of rules: Maine's on I-295 and New Hampshire's once they cross on I-89. Use the Maine vs New Hampshire guide if you shop for a car between Portland or Manchester.
For a quick visit from Augusta to Concord, pack a helmet and proof of insurance, set navigation before leaving, and expect the limit to change from 75 to 70 mph after crossing.
| Topic | Maine | New Hampshire |
|---|---|---|
| Max speed limit | 75 mph | 70 mph |
| Phone law | Hands-free law | Hands-free law |
| Learner's permit age | Permit at 15 | Permit at 15 |
| Car insurance | 50/100/25 | 25/50/25 |
| Car sales tax | 5.5% | None |
| Car inspection | Safety + emissions | No regular inspection |
| New resident deadline | 30 days | 60 days |
| Helmet law | Under 18 | No helmet law |
| Lane splitting | Not allowed | Not allowed |
Driving laws: Maine vs New Hampshire
Maine vs New Hampshire: Maine and New Hampshire agree on Hands-free law for phone law and Permit at 15 for learner's permit age.
Speed limits: Maine vs New Hampshire
New Hampshire is slower on max speed limit, with Maine with 75 mph and New Hampshire at 70 mph. Open-road interstates are posted at 75 mph in Maine and 65 mph in New Hampshire. Heading away from Portland toward Manchester, check the posted limit after the border.
Owning a car compared: Maine vs New Hampshire
Car insurance: Maine vs New Hampshire
Maine is higher on car insurance: Maine at 50/100/25 and New Hampshire with 25/50/25. Maine is at-fault while New Hampshire is at-fault. Coverage bought in Portland has to be updated if you relocate to Manchester.
Car sales tax: Maine vs New Hampshire
The rule is higher in Maine on car sales tax, with Maine with 5.5% and New Hampshire with none. For a $30,000 purchase, state tax is around $1,650 in Maine versus $0 in New Hampshire. Shoppers in Lewiston and Nashua pay the tax of their home state.
Car inspection: Maine vs New Hampshire
New Hampshire is lighter on car inspection: Maine at safety + emissions and New Hampshire with no regular inspection. A car registered in Lewiston answers to Maine rules, even on trips to Nashua.
New resident deadlines: Maine vs New Hampshire
New Hampshire is longer on new resident deadline, with Maine with 30 days and New Hampshire at 60 days. Anyone moving from Lewiston into Nashua ought to book DMV visits early.
Motorcycle: Maine vs New Hampshire
Maine vs New Hampshire: Maine and New Hampshire match on lane splitting: Not allowed.
Motorcycle helmet laws: Maine vs New Hampshire
Maine is stricter on helmet law: Maine at under 18 and New Hampshire with no helmet law. Riders heading from Portland to Manchester fall under New Hampshire's helmet rule on arrival.
Crossing the line for good
- Maine vs New Hampshire: relocating from Maine to New Hampshire means 60 days to register the car and 60 days for a license.
- The other way: 30 days for registration and 30 days to switch licenses.
Maine vs New Hampshire: questions
Which has the higher speed limit, Maine or New Hampshire?
Maine (75 mph vs. 70 mph).
Where is the car tax smaller — Maine or New Hampshire?
New Hampshire costs less at the state level (5.5% vs. None).
Is a motorcycle helmet required in both Maine and New Hampshire?
Maine: Under 18; New Hampshire: No helmet law.