What TSA PreCheck does at security

TSA PreCheck is a program that lets you move through a separate, faster security line at the airport. You keep your shoes, belt, and light jacket on. You leave your laptop and liquids bag in your carry-on instead of removing them. You go through a metal detector instead of a full-body scanner in most cases. The line itself is usually shorter because fewer people are enrolled.

You do not get to skip security entirely. You still show your ID and boarding pass, still go through a screening process, and still follow all TSA rules. The difference is speed and convenience — the whole process typically takes five to ten minutes instead of twenty to thirty.

TSA PreCheck works at over 200 U.S. airports. It does not cover international flights, though some international carriers offer their own trusted traveler programs that work alongside it.

Key Takeaways

  • You must enroll in TSA PreCheck through an official enrollment center or online process before you can use it at security.
  • At the security checkpoint, look for the TSA PreCheck lane and present your ID and boarding pass to the officer.
  • Keep your shoes, belt, light jacket, and carry-on electronics in your bag during screening — do not remove them unless an officer asks.
  • Your TSA PreCheck membership lasts five years and costs $78 to $85 depending on your enrollment method.
  • You must have a valid ID and pass a background check to enroll; the process takes about 10 to 15 minutes at an enrollment center.

How to enroll in TSA PreCheck

Start by going to the official TSA PreCheck website (tsa.gov/precheck) and creating an account. You will fill out an online form with your personal information, passport details if you have one, and background history. The form asks about criminal history, immigration status, and other security-related questions. Answer honestly — false information on the process can result in denial and a fine.

After you submit the form, you will be asked to schedule an appointment at an enrollment center. These are located at airports, some post offices, and other government facilities across the country. The TSA website has a location finder where you can enter your zip code and see which centers are near you. Appointments are usually available within a few weeks, though some locations fill up faster during peak travel seasons.

At your appointment, bring a valid government-issued ID (driver's license, passport, or military ID), proof of citizenship or lawful permanent residency (passport, birth certificate, or naturalization papers), and proof of your current address (utility bill or lease). The officer will take your fingerprints, verify your information, and take a photo. The whole appointment takes about 10 to 15 minutes. You will pay the enrollment fee at this time — currently $78 to $85 depending on whether you pay in person or online.

You will receive your Known Traveler Number (KTN) by email within a few days. This is the number you use when you book flights. Write it down or save it somewhere you can find it quickly.

Adding your TSA PreCheck number to flight reservations

When you book a flight, you will see a field for your Known Traveler Number. Enter your TSA PreCheck KTN in this field. If you forget to add it when you book, you can usually add it to your reservation later through the airline's website or app, or by calling the airline directly. The number must be in your reservation before you check in for your flight.

If you book through a third-party site like Kayak or Expedia, add your KTN to your airline account directly rather than relying on the booking site to carry it over. Log into your airline's website, go to your profile or account settings, and add your TSA PreCheck number to your frequent flyer account or traveler information. This ensures it appears on every booking you make with that airline.

Double-check your boarding pass before you go to the airport. Your boarding pass should show "TSA Pre" or "TSA PreCheck" printed on it. If it does not, contact the airline before you arrive at the airport — they can usually add it to your reservation in minutes.

Using TSA PreCheck at the security checkpoint

When you arrive at the airport, head to the TSA PreCheck security lane. These lanes are clearly marked with blue signs that say "TSA PreCheck" or "TSA Pre." If you cannot find one, ask an airport employee — not all airports have dedicated PreCheck lanes, and some only open them during peak hours.

Have your ID and boarding pass ready before you reach the officer. Present both at the same time. The officer will scan your boarding pass to confirm your TSA PreCheck status. If your boarding pass does not show TSA PreCheck, tell the officer — they may still let you through the PreCheck lane if your KTN is in the system, though this is not may provide.

Once you are cleared, proceed to the screening area. Place your carry-on bag on the conveyor belt. Keep your shoes, socks, belt, and light jacket (like a cardigan or blazer) on. Remove your laptop, tablet, and large electronics from your bag and place them directly on the conveyor belt — you do not need to put them in a separate bin. Keep your liquids bag (3.4 ounces or smaller per container) in your carry-on; you do not need to remove it.

Walk through the metal detector when directed. If you set off the alarm, you will be pulled aside for additional screening, which may include a pat-down or a swab test. This happens occasionally and does not mean you did anything wrong — metal in your clothing or jewelry can trigger the detector.

What you can and cannot do in TSA PreCheck

TSA PreCheck does not change the rules about what you can bring on a plane. You still cannot bring full-size bottles of liquid, sharp objects, or firearms in your carry-on. You still cannot bring lighters or certain tools. The TSA's prohibited items list is the same whether you are in a regular security line or a PreCheck line.

You can keep your shoes on during screening, but if an officer asks you to remove them, do so. You can keep your belt on, but if it has a large metal buckle and sets off the metal detector, be prepared to remove it. You can keep a light jacket on, but a heavy coat or hoodie should come off. Use common sense: if something is likely to set off a metal detector, remove it before you are asked.

TSA PreCheck does not may provide you will not be selected for additional screening. The TSA randomly selects some PreCheck passengers for extra checks. This is normal and happens to a small percentage of travelers. If you are selected, cooperate with the officer and answer their questions directly.

Renewing your TSA PreCheck membership

Your TSA PreCheck membership is valid for five years from the date you enroll. About six months before your membership expires, the TSA will send you a notification by email. You can renew online through the TSA PreCheck website without visiting an enrollment center — the online renewal process takes about five minutes and costs $70 to $85.

If you wait until your membership expires, you will lose your TSA PreCheck status when ready. Your KTN will no longer work, and you will go through regular security lines. You can re-enroll at any time by starting the process over, but there is no advantage to waiting — renewing early is simpler and faster.

Some credit cards and frequent flyer programs offer TSA PreCheck fee reimbursement as a benefit. Check your card's benefits guide or your airline's loyalty program to see if you are covered. If you are, you can use that benefit toward your renewal fee.

Frequently Asked Questions

What if my boarding pass does not show TSA PreCheck?

Contact your airline before you go to the airport. Call their customer service line or log into your account online and check that your KTN is saved in your profile. The airline can add it to your reservation in minutes. If you are already at the airport, tell the TSA officer at the checkpoint — they can look up your KTN in the system and may let you use the PreCheck lane even if your boarding pass does not print it.

Can I use TSA PreCheck on international flights?

TSA PreCheck only works on flights departing from U.S. airports. It does not cover flights to or from other countries. However, if you are flying internationally and have a connection in the United States, you can use TSA PreCheck for the U.S. portion of your journey. Some international airlines offer their own trusted traveler programs that work similarly.

What happens if I forget my ID at the checkpoint?

Tell the TSA officer when ready. You may still be allowed through security if you can provide other forms of identification or answer security questions to verify your identity. The process takes longer, and you are not may provide passage, so always bring your ID. If you left it at home, contact your airline to see if you can reschedule your flight.

Do I need TSA PreCheck for my children?

Children under 12 can go through TSA PreCheck lanes with an adult who has TSA PreCheck, even if the child is not enrolled. Children 12 and older should have their own TSA PreCheck membership if they travel frequently. Enrollment for minors requires a parent or guardian to be present at the appointment.

Can I get my TSA PreCheck fee back if I do not use it?

No. TSA PreCheck fees are non-refundable once you enroll. However, if you enrolled and your membership was denied during the background check process, you may be able to request a refund. Contact the enrollment center where you applied for details.