Idaho vehicle registration basics

Idaho vehicle registration is handled by your county assessor's office, not a central state DMV. You will need to register your vehicle in the county where you live, and the process involves paying a registration fee, providing proof of ownership, and getting your vehicle inspected in most cases. Registration is valid for one year from the month you register, and you renew it annually by the same important date.

The registration fee depends on your vehicle's age, weight, and type. A newer passenger car costs less than an older one or a truck. Idaho also charges an additional fee if your vehicle is powered by alternative fuel. You can register in person at your county assessor's office, by mail, or online through the state's vehicle registration system if you are renewing.

Key Takeaways

  • Register your vehicle at your county assessor's office, not a state DMV office, within 30 days of buying it or moving to Idaho.
  • You will need the vehicle title, proof of insurance, a completed registration form, and proof of residency to complete registration.
  • Most new vehicles require a safety inspection before registration; older vehicles and renewals may not.
  • Registration fees vary by vehicle weight and age, and you can pay by cash, check, or card at the assessor's office or by mail.
  • You can renew registration online if you have not changed vehicles, but address changes and new registrations require an in-person or mail visit.

What documents you need to bring

Bring the vehicle title or proof of ownership to your county assessor's office. If you are registering a vehicle you just bought, bring the bill of sale or the title transfer document. If you are moving to Idaho from another state, bring your out-of-state registration or title.

You also need proof of insurance. Idaho requires liability insurance on all registered vehicles. Bring your insurance card or a letter from your insurance company showing your policy number and coverage dates. The assessor's office will not register the vehicle without proof of active insurance.

Bring a completed Form 43-201 (process for Vehicle Registration). You can fill this out before you arrive or at the assessor's office. You will also need proof of residency—a utility bill, lease, or mortgage statement showing your name and Idaho address. If you are registering a commercial vehicle or trailer, bring the appropriate commercial registration form instead.

Vehicle inspection requirements in Idaho

New vehicles and vehicles registered for the first time in Idaho must pass a safety inspection before registration. The inspection checks your brakes, lights, horn, windshield wipers, and steering. You can have the inspection done at any authorized inspection station in Idaho; the assessor's office can give you a list of nearby stations.

Vehicles that are already registered in Idaho and are renewing do not need an inspection every year. However, if you have made major repairs or modifications, or if your vehicle fails the initial inspection, you will need to get it re-inspected before the assessor's office will issue your registration.

The inspection costs between $10 and $15 depending on the station. Once you pass, the station gives you an inspection certificate. Bring this certificate to the assessor's office when you register, or mail it with your registration form if you are registering by mail.

Registration fees and payment methods

Idaho registration fees are based on your vehicle's dry weight (the weight without fuel or cargo) and its age. A passenger car under 4,000 pounds costs less than a truck or SUV over 6,000 pounds. Vehicles older than 11 years pay a lower fee than newer ones. You can find the exact fee for your vehicle by entering its weight and year on the Idaho State Tax Commission website or by calling your county assessor's office.

Alternative-fuel vehicles—electric, hybrid, or natural gas—pay an additional $10 fee on top of the standard registration fee. Disabled veterans and certain other groups may be exempt from registration fees; ask your assessor's office if you think you may have access to.

You can pay by cash, check, or card at the assessor's office. If you are registering by mail, send a check or money order. Online renewal accepts card payments. The assessor's office will not process your registration until payment clears.

How to register by mail or online

If you are renewing a registration for a vehicle you already own and have not changed your address, you can renew online through the Idaho State Tax Commission website. Log in with your vehicle identification number (VIN) and the last four digits of your Social Security number. Pay the renewal fee by card and print your new registration. This takes a few minutes and you can do it from home.

To register by mail, fill out Form 43-201, include a copy of your inspection certificate (if required), proof of insurance, and a check for the registration fee. Mail everything to your county assessor's office. Processing takes 5 to 10 business days after the office receives your packet. Include a self-addressed stamped envelope if you want your registration mailed back to you.

New registrations and address changes must be done in person or by mail; they cannot be done online. If you are moving to a new county in Idaho, you must register in your new county assessor's office, not your old one.

What happens after you register

After your registration is approved, the assessor's office will issue you a registration certificate and license plates (if you are registering for the first time in Idaho). The certificate shows your vehicle identification number, registration number, and expiration date. Keep this certificate in your vehicle at all times; you must show it to a police officer if you are stopped.

Your registration expires on the last day of the month in which you registered. If you registered in March, your registration expires on March 31 of the following year. You will receive a renewal notice in the mail about 30 days before expiration. Renew before the expiration date to avoid a late fee and to keep your registration valid.

If you sell your vehicle, notify the assessor's office in writing or online. The new owner must register the vehicle in their name within 30 days. If you buy a vehicle from a private seller, you have 30 days to register it in Idaho before you can legally drive it.

Registering vehicles from out of state

If you are moving to Idaho and bringing a vehicle registered in another state, you have 30 days to register it in Idaho. Bring your out-of-state title or registration, proof of insurance, and proof of residency. You will need to get a safety inspection before the assessor's office will register the vehicle, unless it is very old or exempt.

If your out-of-state title is in someone else's name, you will need a bill of sale or a notarized statement from that person giving you permission to register it. Some states issue titles differently than Idaho does; if you have questions about your title, call your county assessor's office before you visit.

Once registered in Idaho, you will receive new Idaho license plates. You can keep your old plates as a souvenir, but you must display the new Idaho plates on your vehicle.

Frequently Asked Questions

Can I register my vehicle online if I just moved to Idaho?

No. Online registration is only for renewals of vehicles already registered in Idaho with no address changes. If you are new to Idaho or have moved to a different county, you must register in person at your new county assessor's office or by mail.

What if I buy a vehicle and the seller does not have the title yet?

You can register with a bill of sale and proof that the title is on the way. Bring a written statement from the seller saying the title has been ordered and when it is expected. The assessor's office will issue a temporary registration good for 30 days while you wait for the title to arrive. Once it does, bring it to the assessor's office to update your registration.

Do I have to get new license plates every time I renew?

No. You keep the same plates as long as you own the vehicle. You only get new plates if you register a vehicle for the first time in Idaho, if your plates are damaged, or if you request a personalized plate. When you renew, you just get a new registration certificate and a renewal sticker for your plate.

What if my vehicle fails the safety inspection?

The inspection station will tell you what failed and what needs to be fixed. You have time to make the repairs and return for a re-inspection at the same station. Once you pass, bring the new inspection certificate to the assessor's office. There is no extra fee for a re-inspection at most stations.

Can I register a vehicle if I do not have an Idaho address yet?

No. You must have a physical Idaho address to register a vehicle in the state. If you are moving to Idaho but do not have housing yet, you can use a temporary address such as a friend's or family member's address, but you must update your registration within 30 days of getting your own address.