Taking a New Car Across State Lines: What You Need to Know

You can drive a new car across state lines, but you need the right paperwork and a temporary registration before you leave the dealership

When you buy a car, you cannot legally drive it off the lot with only a bill of sale. Before you cross into another state, you need either a temporary registration from your home state or a dealer plate. Most dealerships provide a temporary registration good for 30 to 45 days — check what yours gives you before you leave. If you are driving to another state immediately, confirm that your temporary registration is valid there, because some states do not recognize temporary tags from other states.

The rules change depending on whether you are moving permanently, visiting temporarily, or buying the car in one state and registering it in another. Each situation requires different paperwork and timing. Understanding what you need before you drive prevents you from being stopped and cited for an unregistered vehicle.

Key Takeaways

• You must have a temporary registration or dealer plate before driving a new car off the lot, even within your home state.
• Temporary registrations from one state are not always valid in other states, so contact the state you are driving to and confirm yours will work there.
• If you are moving permanently to another state, you typically have 10 to 30 days after arrival to register the car in your new state.
• If you are buying a car in one state and registering it in another, you may need to register it in your home state first, then transfer the registration later.
• Keep your bill of sale, proof of insurance, and temporary registration documents with you while driving, as law enforcement may ask to see them.

What paperwork you need before leaving the dealership

The dealership must provide you with a temporary registration or dealer plate before you drive the car off the lot. A temporary registration is a printed document, usually valid for 30 to 45 days, that shows you own the car and have permission to drive it while waiting for your permanent registration. A dealer plate is a physical license plate the dealership loans you temporarily. Ask which one your dealership is giving you and how long it is valid.

You also need proof of insurance before you drive away. Most states require you to have liability insurance in place before the car leaves the lot. Your insurance company can issue a temporary proof of insurance card or binder on the spot, either in person or by email. Do not leave without this — driving uninsured is illegal in every state.

Get a copy of your bill of sale from the dealership. This document proves you own the car and is required when you register it in your home state or any other state. Keep it with your other car documents while you travel.

Temporary registrations and crossing state lines

Before you drive to another state, call the Department of Motor Vehicles (or equivalent agency) in the state you are traveling to and ask whether they recognize temporary registrations from your home state. Some states do accept out-of-state temporary tags; others do not. If the state you are driving to does not recognize your temporary registration, you may be cited for driving an unregistered vehicle, even though your registration is valid in your home state.

If your temporary registration will not be accepted in the state you are traveling to, ask the dealership whether they can issue you a dealer plate instead, which is more likely to be recognized across state lines. Dealer plates are typically valid in all states because they are issued by the dealership, not the state government.

If you are driving through multiple states, check the rules in each one. A temporary registration valid in State A may not be valid in State B. Plan your route and make these calls before you leave so you know what to expect.

If you are moving permanently to another state

Most states give you a grace period of 10 to 30 days after you move to register your car in your new state. During this time, your home state's temporary registration or your old state's permanent registration remains valid. Check your new state's specific timeline — some states count from the day you arrive, others from the day you establish residency (like getting a new driver's license).

To register your car in your new state, you will need your bill of sale, proof of insurance, proof of residency (usually a utility bill or lease), your driver's license, and the car's title or a document from the dealership showing you own it. Some states also require an inspection or emissions test before registration. Contact your new state's DMV to find out what is required and whether you can start the process before you move or must wait until you arrive.

If you miss the grace period, you may face a late fee or be cited for driving an unregistered vehicle. If you know you will not make the deadline, contact your new state's DMV ahead of time — many will extend the deadline if you have a documented reason.

If you are buying the car in one state and registering it in another

Some people buy a car in a state where they do not live. In this case, you typically register the car in your home state first, then transfer the registration to your new state later if you move. Ask the dealership which state they recommend you register in — they may have experience with this situation and can advise you on the fastest route.

You will need to register the car within the grace period allowed by your home state (usually 10 to 30 days). Once you have a permanent registration from your home state, you can drive across state lines legally. If you later move to another state, you can transfer your registration to that state using your existing title and registration documents.

Some states allow you to register a car before you take possession of it, which can speed up the process. Call your home state's DMV and ask whether you can register the car at the dealership or whether you must wait until you own it.

Insurance and liability across state lines

Your auto insurance policy is valid in every state, but the coverage limits and requirements vary by state. Before you drive across state lines, contact your insurance company and confirm that your policy meets the minimum liability requirements of every state you will be driving through. Some states require higher minimum coverage than others.

If you are moving permanently to another state, tell your insurance company as soon as you know. They may adjust your rates based on your new location and may require you to update your policy to reflect your new address and the car's new registration state.

Keep proof of insurance with you while you drive. Your insurance company can email you a temporary proof of insurance card if you do not have a physical card yet. Law enforcement may ask to see it if you are stopped.

What to do if you are stopped while driving a new car

If a police officer stops you and asks about your registration, explain that you have a temporary registration or dealer plate and show them the document. Have your bill of sale, proof of insurance, and driver's license ready. Most officers are familiar with temporary registrations and will not cite you if your paperwork is in order.

If the officer says your temporary registration is not valid in that state, stay calm and ask for the citation. You can contest it later if you believe your registration was valid. Do not argue at the roadside. If you are concerned about the validity of your registration in a particular state, call that state's DMV before you drive there and get written confirmation that your temporary registration is accepted.

Frequently Asked Questions

Can I drive a new car across state lines with just a bill of sale?

No. You need a temporary registration or dealer plate from the dealership before you drive the car anywhere, even within your home state. A bill of sale alone does not give you permission to drive. Ask the dealership what temporary registration they are providing and how long it is valid.

How long is a temporary registration good for?

Most temporary registrations are valid for 30 to 45 days from the date of purchase. Check your specific document — it will show the expiration date. If you need more time, contact your state's DMV and ask about an extension or a second temporary registration.

What if I buy a car in one state but live in another?

Register the car in your home state within the grace period (usually 10 to 30 days). You can then drive it legally in any state. If you move to a different state later, you can transfer your registration to that state using your existing title and registration documents.

Do I need to register my car in every state I drive through?

No. You only need to register your car in your home state or the state where you live. If you are traveling through other states temporarily, your home state registration is valid. If you move permanently to a new state, you must register the car there within the grace period.

What happens if my temporary registration expires while I am out of state?

You cannot legally drive the car. If your temporary registration is about to expire and you are still traveling, contact your home state's DMV and ask for an extension or a second temporary registration. Some states allow this if you have a documented reason, such as waiting for your permanent registration to arrive.