What you need to register a car in Idaho

Idaho requires you to register your vehicle with the Idaho Transportation Department (ITD) within 30 days of becoming the owner. You will need the vehicle's title (either the original or a certified copy), proof of ownership, a completed registration form, and proof of Idaho residency. If the vehicle is financed, your lender's name must appear on the title.

The registration process differs slightly depending on whether you are registering a new vehicle, transferring ownership from another state, or renewing an existing registration. New vehicles come with a manufacturer's certificate of origin instead of a title; used vehicles need the signed title from the previous owner. Out-of-state titles must be submitted to ITD for a new Idaho title before registration is complete.

You can register your vehicle in person at any ITD office, by mail, or online through the ITD website if you meet certain conditions. Online registration is available for renewals and some ownership transfers, but new registrations and out-of-state transfers typically require in-person or mail submission.

Key Takeaways

  • Idaho requires registration within 30 days of ownership, and you must submit the vehicle title, proof of residency, and a completed registration form to ITD.
  • New vehicles need the manufacturer's certificate of origin; used vehicles need the signed title from the previous owner.
  • Out-of-state titles must be reissued by ITD as Idaho titles before your vehicle can be registered.
  • Registration fees vary by vehicle weight and type, and you can pay by mail, in person, or online depending on your registration type.

Documents you need before you start

Gather these documents before visiting an ITD office or submitting by mail. You will need the vehicle's title or certificate of origin, signed by the previous owner if it is a used vehicle. Bring a government-issued photo ID and proof that you live in Idaho—a utility bill, lease agreement, or mortgage statement dated within the last 60 days works. If someone else is on the title with you, both owners must sign the registration form.

If the vehicle is financed, bring the loan documents showing the lender's name and address. The lender's name will appear on your Idaho title as a lienholder. If you are registering a vehicle purchased out of state, bring the out-of-state title and any bill of sale or purchase agreement. For vehicles with a salvage or rebuilt title, you will also need an inspection report from an authorized Idaho inspector.

Keep copies of everything you submit. ITD will return your original title and send you a registration certificate and license plates by mail, usually within two to three weeks.

Registration fees and what affects the cost

Idaho registration fees are based on the vehicle's dry weight (the weight without fuel or cargo). Passenger cars typically cost between $80 and $120 for a two-year registration, while trucks and SUVs cost more depending on weight. Motorcycles, trailers, and recreational vehicles have separate fee schedules. You can find the exact fee for your vehicle on the ITD website by entering the vehicle's weight.

Additional fees explore in certain situations. If you are transferring an out-of-state title to Idaho, there is a title transfer fee of around $14. If you need expedited processing or replacement plates, those carry separate charges. Some vehicles may also owe a one-time registration tax based on the purchase price, though this applies mainly to new vehicle registrations.

Registration is valid for two years in Idaho. You will receive a renewal notice by mail about 30 days before expiration, and you can renew online, by mail, or in person.

Registering a vehicle purchased in Idaho

If you bought the car from a dealer in Idaho, the dealer often handles the title transfer and initial registration as part of the sale. Confirm this before you leave the lot—ask whether the dealer will submit the paperwork or whether you need to do it yourself. If the dealer is handling it, ask for a receipt showing the submission date and what documents they submitted on your behalf.

If you bought the car from a private seller in Idaho, you will handle the registration yourself. The seller must sign the title and provide it to you. Complete the registration form (Form 39, available on the ITD website), gather your proof of residency and ID, and submit everything to ITD in person or by mail along with the registration fee. Do not drive the vehicle on public roads until you have received your registration certificate and license plates.

Transferring registration from another state

When you move to Idaho or buy a vehicle registered in another state, you must obtain an Idaho title and register the vehicle with ITD. The out-of-state title must be submitted to ITD first; they will issue a new Idaho title, which typically takes two to four weeks. Only after you receive the Idaho title can you complete the registration process.

Submit the out-of-state title, proof of Idaho residency, your ID, and the registration form to ITD by mail or in person. Include the title transfer fee (around $14) and the registration fee based on the vehicle's weight. If the out-of-state title shows a lienholder, that information will transfer to your Idaho title automatically.

Some states do not issue physical titles for older vehicles or certain vehicle types. If your out-of-state vehicle has no title, contact ITD directly to learn what documents you will need instead—usually a bill of sale and an inspection report.

Where to register and how long it takes

ITD has offices in Boise, Coeur d'Alene, Pocatello, and Idaho Falls, plus smaller satellite offices in other towns. You can find the office nearest you and its hours on the ITD website. In-person registration usually takes 15 to 30 minutes if you have all documents ready.

If you prefer not to visit an office, you can mail your documents and payment to the ITD address listed on their website. Mail-in registration takes two to four weeks for processing, plus mail delivery time. Include a cover letter listing what you are submitting and your contact information in case ITD needs to reach you.

Online registration is available for renewals and some title transfers through the ITD website, but new registrations and out-of-state transfers require mail or in-person submission. If you use online renewal, you can print your temporary registration certificate when ready and receive your permanent plates by mail within two weeks.

What happens if you register late

Idaho law requires registration within 30 days of ownership. If you miss this important date, you cannot legally drive the vehicle on public roads. If you are stopped by law enforcement without current registration, you face a fine and the vehicle may be impounded.

If you have owned the vehicle for more than 30 days and have not registered it, register it as soon as possible. ITD does not charge a penalty fee for late registration, but you will owe the full registration fee for the two-year period. Bring all required documents and the registration fee to an ITD office or submit by mail.

Frequently Asked Questions

Can I drive my car before the registration arrives in the mail?

No. You cannot legally drive on public roads until you have received your registration certificate and license plates. If you register in person, ask ITD for a temporary registration document you can use while waiting for the plates to arrive by mail. Online renewals provide a printable temporary certificate when ready.

What if the title has the wrong name or information?

Contact the previous owner or the state where the title was issued and ask for a corrected title before submitting to Idaho. If the title is already in your name but contains errors, submit it to ITD along with a written explanation and supporting documents (like a bill of sale showing the correct information). ITD will review and may issue a corrected title.

Do I need to register a vehicle if I only drive it off-road?

Off-road vehicles used only on private property do not need to be registered. However, if the vehicle will be driven on any public road—even briefly—it must be registered. This includes driveways that connect to public roads.

Can someone else register my vehicle for me?

Yes, if you give them a signed power of attorney form. The person registering on your behalf must bring the power of attorney, all required documents, and proof of their own identity. ITD provides a power of attorney form on their website.

What if my vehicle has a lien and I want to register it?

You can register a financed vehicle. The lender's name will appear on your Idaho title as a lienholder. Bring the loan documents showing the lender's name and address when you register. The lender does not need to sign anything; ITD adds their name based on the information you provide.