Where to register your vehicle in San Antonio

In San Antonio, you register your vehicle through the Bexar County Tax Assessor-Collector's Office, not through a separate DMV or motor vehicles department. Texas does not have a DMV; the tax assessor-collector handles vehicle registration, title transfers, and renewal for your county. For San Antonio residents, that means the Bexar County office is your single point of contact.

The main office is located at 233 W. Commerce Street, San Antonio, TX 78205. You can also visit one of several satellite locations around the county if the main office is inconvenient. The office is open Monday through Friday, 8:00 a.m. to 5:00 p.m., though hours may vary by location. You can check the Bexar County Tax Assessor-Collector website for the full list of branch offices and their specific hours before you go.

Walk-in service is available, but wait times can be long during peak hours—typically mid-morning and mid-afternoon on weekdays. If you want to avoid a wait, arriving early in the morning or later in the afternoon usually means shorter lines. Some transactions can also be handled by mail or online, which we cover below.

Key Takeaways

  • The Bexar County Tax Assessor-Collector's Office handles all vehicle registration in San Antonio; there is no separate DMV.
  • You will need your vehicle's title, proof of insurance, and proof of residency to register a vehicle for the first time in Texas.
  • Registration fees in Texas are based on the vehicle's value and age, not a flat rate, so the cost varies by what you own.
  • You can renew registration by mail, online, or in person, and renewal notices are mailed about 60 days before your current registration expires.
  • If you buy a used car from a private seller, you have 30 days to register it in Texas before you risk a penalty.

Documents you need to register a vehicle for the first time

If you are registering a vehicle in San Antonio for the first time—whether it is new, used from a dealer, or used from a private seller—you will need to bring several documents. The vehicle title is the most important: this is the legal document that proves ownership. If you bought the car from a dealer, they usually handle the title paperwork and send it to you; if you bought it privately, the seller must sign the title over to you before you register it.

You also need proof of insurance. Texas law requires all registered vehicles to carry liability insurance. Bring your insurance card or a declaration page from your insurance company showing your policy number, the vehicle identification number (VIN), and the coverage dates. The insurance must be active on the day you register the vehicle.

Bring proof of residency showing your San Antonio or Bexar County address. A utility bill, lease agreement, or mortgage statement dated within the last 60 days works. You will also need a valid photo ID—a driver's license, passport, or state ID card. If someone else is registering the vehicle on your behalf, bring a notarized power of attorney.

If the vehicle is financed, bring the loan documents or a letter from your lender showing the lien holder information. The lien holder's name will appear on the registration. Bring the vehicle itself or have it inspected at an authorized inspection station if the county requires a VIN verification for your particular situation.

How registration fees are calculated in Texas

Texas registration fees are not a flat rate; they are based on the vehicle's value and age. The Bexar County Tax Assessor-Collector uses a formula that takes into account the manufacturer's suggested retail price (MSRP) when the vehicle was new and how old the vehicle is. Newer vehicles and higher-value vehicles cost more to register than older or less expensive ones.

The fee structure is tiered. For example, a vehicle worth $20,000 will cost more than one worth $10,000. The older a vehicle gets, the lower its assessed value becomes for registration purposes, so your fee may decrease year to year if you keep the same car. You can use the Texas Department of Motor Vehicles fee calculator on their website to estimate what your registration will cost before you go to the office.

You may also owe county or local fees on top of the state registration fee. Bexar County may charge additional fees depending on the vehicle type or your location within the county. Ask the tax assessor-collector's office for a complete breakdown of fees before you pay, or check their website for a fee schedule.

Renewing your registration in San Antonio

Your vehicle registration in Texas is valid for one or two years, depending on what you choose at registration. About 60 days before your registration expires, the Bexar County Tax Assessor-Collector will mail you a renewal notice to the address on file. This notice includes your renewal fee and instructions for renewing.

You have three ways to renew: by mail, online, or in person. To renew by mail, fill out the renewal notice, include your payment, and mail it back to the address shown. To renew online, visit the Bexar County Tax Assessor-Collector website and follow the online renewal portal. You will need your vehicle information and a valid payment method. In-person renewal at any county office takes just a few minutes if you have your renewal notice and payment ready.

You must renew before your registration expires. Driving with an expired registration can result in a traffic citation and a fine. If you miss the important date, you will need to re-register the vehicle as if it were new, which takes longer and may cost more. If your renewal notice does not arrive, contact the tax assessor-collector's office directly—do not wait until the last day.

Registering a vehicle you bought from a private seller

When you buy a used car from a private seller in Texas, you have 30 days to register it before you are subject to a penalty. The seller must sign the title over to you and provide you with a bill of sale (though a bill of sale is not legally required in Texas, it is good practice to have one). Do not drive the vehicle without insurance, even during those 30 days.

Take the signed title, proof of insurance, and proof of residency to the Bexar County Tax Assessor-Collector's Office. If the title has a lien on it—meaning the seller still owes money on the vehicle—the lien holder's name will be on the title. You cannot register the vehicle until that lien is cleared. Ask the seller to pay off the loan and have the lien removed before you complete the purchase, or the lien holder must sign off on the title transfer.

If the title is lost or damaged, the seller can request a duplicate from the county where they originally registered the vehicle. This takes time, so ask the seller to handle it before you take possession. If you register the vehicle before the 30-day window closes, you will avoid penalties, but the registration will be based on the vehicle's current value, not what you paid for it.

What to do if your registration is lost or damaged

If your registration card is lost, stolen, or damaged, you can request a replacement from the Bexar County Tax Assessor-Collector's Office. You do not need to re-register the vehicle; you only need a duplicate of your current registration. Bring your driver's license and vehicle information to any county office, or call ahead to confirm what documents they need.

A replacement registration usually costs a small fee—typically under $10—and can be issued the same day if you visit in person. You can also request a duplicate by mail; send a letter with your vehicle information and payment to the main office, and they will mail the replacement to you. Keep your replacement registration in your vehicle at all times, as you are required to show it during a traffic stop.

If your registration has expired and you need a replacement, you must renew first before requesting a duplicate. Do not delay; driving without a valid registration is a traffic violation.

Transferring registration when you move to or from San Antonio

If you move to San Antonio from another state, you have a limited time to register your vehicle in Texas. Most states give you 30 to 90 days, though Texas does not have a specific grace period—you should register as soon as you establish residency. Bring your out-of-state title, proof of Texas residency, proof of insurance, and your ID to the Bexar County Tax Assessor-Collector's Office. Your out-of-state registration will no longer be valid once you register in Texas.

If you move out of San Antonio or out of Texas, you do not need to notify the Bexar County office. Your registration remains valid until it expires. If you move to another Texas county, you can transfer your registration to that county's tax assessor-collector, though you are not required to do so unless your registration has expired.

If you move out of state, your Texas registration expires and is no longer valid. Register your vehicle in your new state according to that state's requirements. Keep your Texas title in a safe place; you will need it if you ever move back to Texas or sell the vehicle to someone in Texas.

Frequently Asked Questions

Can I register my car online in San Antonio?

You can renew an existing registration online through the Bexar County Tax Assessor-Collector website. However, new registrations and title transfers must be done in person or by mail. If you are registering a vehicle for the first time, you will need to visit an office or mail in your documents with the original title.

What if I buy a car from a dealership instead of a private seller?

Dealerships typically handle the title paperwork and send it to you or directly to the county. They will give you a temporary registration or temporary tag that is valid for a short period while the title is being processed. Once you receive the title, take it to the Bexar County Tax Assessor-Collector's Office to complete the registration. Ask the dealership how long the temporary tag is valid so you know your important date.

How long does it take to register a vehicle in person?

If you have all your documents ready and arrive during a slow time, registration can take 15 to 30 minutes. During busy periods, you may wait 45 minutes to over an hour. Arriving early in the morning or later in the afternoon usually means shorter waits than mid-morning or mid-afternoon.

What happens if I drive with an expired registration?

Driving with an expired registration is a traffic violation in Texas. You can be stopped and cited, and you may face a fine. If your registration is about to expire, renew it before the expiration date. If it has already expired, renew it when ready and keep proof of renewal in your vehicle in case you are stopped.

Do I need to get a vehicle inspection before I register it?

Texas requires a vehicle safety inspection for new registrations and renewals, but the inspection is separate from registration. You must get the inspection at an authorized inspection station, then bring the inspection report to the tax assessor-collector's office along with your other documents. Some stations can do this on the same day; plan ahead to avoid delays.