Register your out-of-state vehicle in Colorado within 90 days of establishing residency

Colorado law requires you to register any vehicle you own within 90 days of becoming a Colorado resident. If you already own a vehicle registered in another state and move to Colorado, you must transfer that registration to Colorado rather than renew it in your old state. The process involves getting a Colorado title, passing an emissions test (in most cases), and then registering the vehicle with the Colorado Department of Revenue.

You cannot legally drive on Colorado roads with an out-of-state registration once you are a Colorado resident, even if your old registration has not expired. The 90-day window starts when you establish residency — typically the date you get a Colorado driver's license, lease or buy a home, or register to vote in the state.

Key Takeaways

  • You have 90 days from establishing Colorado residency to register your vehicle in Colorado; driving past that important date with an out-of-state plate is illegal.
  • You must obtain a Colorado title before you can register, which requires submitting your current out-of-state title and proof of residency to the county clerk.
  • Most vehicles must pass an emissions test before registration, though some newer vehicles and certain vehicle types are exempt.
  • The total cost ranges from roughly $150 to $300 depending on vehicle age and weight, plus the emissions test fee if required.
  • You can complete the title transfer and registration in person at your county clerk's office or through an authorized third-party vendor.

Gather documents before you visit the county clerk

Start by collecting your out-of-state title, your Colorado driver's license or proof of residency, and your vehicle's VIN. You will also need proof of insurance — Colorado requires liability coverage before registration. Bring the original out-of-state title or a certified copy; if the title is held by a lender, you may need a letter from the lender authorizing the transfer.

If you do not yet have a Colorado driver's license, bring a lease agreement, utility bill, or mortgage statement dated within the last 60 days to prove residency. Some county clerks accept a temporary driver's license receipt as proof of residency if you have applied for a permanent license. Call your county clerk's office before you go to confirm which documents they accept, since requirements vary slightly by county.

Get a Colorado title at your county clerk's office

Visit the county clerk's office in the county where you live. Bring your out-of-state title, proof of residency, and proof of insurance. The clerk will issue you a Colorado title, which typically takes 10 to 15 business days to arrive by mail. You cannot register the vehicle until you have the Colorado title in hand.

If your vehicle is financed, the lender's name will appear on the Colorado title as a lienholder. If you own the vehicle outright, you will be listed as the sole owner. The title fee is usually $10 to $20, depending on your county. Some counties allow you to pay for expedited processing, which can reduce the wait to 5 to 7 business days, though this costs extra.

Schedule and pass an emissions test

Once you have your Colorado title, you must schedule an emissions test before you can register. Colorado requires emissions testing for most vehicles, with some exceptions. Vehicles model year 2020 and newer are exempt. Vehicles model year 1981 and older are also exempt. Diesel vehicles and motorcycles have different testing requirements or exemptions.

Find an approved testing station through the Colorado Department of Public Health and Environment website. The test costs between $25 and $35 and takes about 15 minutes. You will receive a pass or fail certificate when ready. If your vehicle fails, you have 30 days to repair it and retest at no additional fee. Once you pass, the certificate is valid for 90 days, so schedule your registration appointment soon after.

Complete vehicle registration at the county clerk or third-party vendor

After you receive your Colorado title and pass the emissions test, return to the county clerk's office with your title, emissions certificate, proof of insurance, and your vehicle's registration form (Form DR 2251, available on the Colorado Department of Revenue website). The clerk will process your registration and issue Colorado plates and a registration sticker.

Alternatively, you can use an authorized third-party vendor — many insurance agents, auto parts stores, and independent registration services are licensed to handle this. Third-party vendors charge a service fee on top of the state registration fee, typically $10 to $25. Registration itself costs between $100 and $250 depending on your vehicle's age and weight. You will receive temporary plates when ready and permanent plates by mail within 5 to 10 business days.

Understand registration costs and vehicle weight fees

Colorado registration fees are based on your vehicle's age and weight. A newer vehicle (model year 2015 or later) typically costs $100 to $150. Older vehicles cost less. Heavier vehicles cost more — a truck or SUV may cost $50 to $100 more than a sedan of the same age. The state publishes a fee schedule on the Department of Revenue website; you can calculate your exact fee before you go.

Add the emissions test fee ($25 to $35), the title transfer fee ($10 to $20), and any county-specific fees. If you use a third-party vendor, add their service fee. Total out-of-pocket cost typically ranges from $150 to $300, not including insurance. Some counties offer online payment options, which can save you a trip if you are renewing an existing Colorado registration, but title transfers for out-of-state vehicles usually require an in-person visit.

Handle special situations: financed vehicles, out-of-state plates, and late registration

If your vehicle is financed, the lender must release the out-of-state title before you can get a Colorado title. Contact your lender and ask them to send a lien release letter or to authorize the transfer directly to Colorado. Some lenders handle this automatically; others require a written request. Do not assume the process is automatic — call your lender at least two weeks before your 90-day important date.

If you miss the 90-day important date, you can still register your vehicle, but you may face a late fee. Colorado charges a penalty for registrations submitted after the 90-day window, typically $25 to $50. You cannot legally drive the vehicle until it is registered, so if you have already been driving on an out-of-state plate past the important date, register when ready to avoid further penalties or citations.

Frequently Asked Questions

Can I drive my out-of-state vehicle in Colorado before I register it?

You can drive it for up to 90 days after you establish residency. After that, you must have Colorado registration. Driving past the important date with an out-of-state plate is illegal and can result in a citation and fine.

What if my out-of-state title is held by a lender?

Contact your lender and ask for a lien release letter or authorization to transfer the title to Colorado. Provide this letter to the county clerk when you explore for your Colorado title. Some lenders process this in a few days; others take longer, so start early.

Do I have to pass an emissions test if my vehicle is brand new?

No. Vehicles model year 2020 and newer are exempt from emissions testing. Vehicles model year 1981 and older are also exempt. If your vehicle falls between those years, an emissions test is required unless it is a motorcycle or diesel vehicle with different rules.

Can I register my vehicle online or by mail?

Title transfers for out-of-state vehicles require an in-person visit to the county clerk or an authorized third-party vendor. You cannot complete a title transfer entirely online or by mail. However, some counties allow you to renew an existing Colorado registration online.

What happens if my vehicle fails the emissions test?

You have 30 days to repair the vehicle and retest at no additional charge. Once you pass, the certificate is valid for 90 days. You cannot register until you have a passing certificate, so schedule repairs as soon as possible if you fail.