State comparison · Updated October 2026
Missouri vs. Tennessee Driving Laws (2026)
Missouri and Tennessee part ways on 4 of 9 rules we track: max speed limit, car sales tax, car inspection and helmet law.
A drive from Kansas City to Nashville takes you across the border, and 4 of the nine rules change on the way. Key roads include I-70 on the Missouri side and I-40 in Tennessee; the capitals, Jefferson City and Nashville, set the rules for their side.
The biggest gap: the state tax on a $30,000 car differs by $833. Residents of St. Louis heading to Memphis, or vice versa, live under both rulebooks: Missouri's on I-44 and Tennessee's across the border on I-24. Use the Missouri vs Tennessee guide if you shop for a car between Kansas City to Nashville.
For a weekend trip from Jefferson City to Nashville, pack your documents and proof of insurance, set navigation ahead of time, and expect a change from 75 to 70 mph at the line.
| Topic | Missouri | Tennessee |
|---|---|---|
| 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 | 25/50/25 | 25/50/25 |
| Car sales tax | 4.225% | 7% |
| Car inspection | Safety + emissions | No regular inspection |
| New resident deadline | 30 days | 30 days |
| Helmet law | Under 26 | All riders |
| Lane splitting | Not allowed | Not allowed |
Driving laws side by side: Missouri vs Tennessee
Missouri vs Tennessee: Missouri and Tennessee have the same rule for phone law (Hands-free law) and learner's permit age: Permit at 15.
Speed limits: Missouri vs Tennessee
Missouri is faster on max speed limit, with Missouri at 75 mph and Tennessee at 70 mph. Rural interstates reach 75 mph in Missouri and 70 mph in Tennessee. Driving out of Kansas City toward Nashville, watch the signs at the state line.
Owning a car compared: the comparison
Missouri vs Tennessee: Missouri and Tennessee match on car insurance: 25/50/25 and new resident deadline: 30 days.
Car sales tax: Missouri vs Tennessee
The rule is higher in Tennessee on car sales tax, with Missouri with 4.225% and Tennessee with 7%. For a $30,000 purchase, state tax is about $1,268 in Missouri and $2,100 in Tennessee. Buyers from St. Louis or Memphis owe car tax based on their registration address, not the dealer's.
Vehicle inspection and emissions testing: Missouri vs Tennessee
Tennessee is lighter on car inspection, with Missouri with safety + emissions and Tennessee at no regular inspection. Owners in St. Louis is inspected under Missouri laws, even when driven to Memphis.
Motorcycle: Missouri vs Tennessee
Missouri vs Tennessee: Tennessee and Missouri agree on lane splitting: Not permitted.
Helmet law: Missouri vs Tennessee
The law is stricter in Tennessee on helmet law: Missouri with under 26 and Tennessee at all riders. Riders crossing from Kansas City toward Nashville fall under Tennessee's helmet law at the line.
Crossing the line for good
- Missouri vs Tennessee: moving from Missouri to Tennessee means 30 days for the car registration and 30 days for the license switch.
- Going from Tennessee to Missouri: 30 days for registration and 30 days to switch licenses.
Missouri vs Tennessee: FAQ
Where can you drive faster, Missouri or Tennessee?
Missouri (75 mph vs. 70 mph).
Which state taxes cars less, Missouri or Tennessee?
Missouri costs less at the state level (4.225% vs. 7%).
Is a motorcycle helmet mandatory in both Missouri and Tennessee?
Missouri: Under 26; Tennessee: All riders.