Tagless payment (Tagless) is a method in which your fare is charged automatically simply by walking through the gate, without tapping a transit card or smartphone on a reader. It means you can pass through with your phone still in your pocket or bag, without taking a card out at the gate. In Seoul, this is already a reality with Tmoney Tagless.
Starting with the Ui-Sinseol Line and expanding across the Incheon subway, service reached Seoul Subway Line 9 in July 2026. New York and London, by contrast, still rely mainly on contactless (Contactless) payment, where you tap a card or smartphone on a reader.
In this article, we’ll cover what tagless payment is and how it works, how it differs from contactless, how transit fare payment compares across major global cities and Seoul, and how to use the tagless transit card.
1. What is tagless payment? A transit card you never tap
1) Just walk through the gate — the fare is charged automatically
Tagless payment is a method in which your fare is charged automatically simply by walking through the gate, without tapping a transit card or smartphone on a reader. Because the system recognizes boarding and alighting just from your entry (Be-In) and exit (Be-Out), it is also known as the Be-In Be-Out (BIBO) method.
Key features:
- Pass through with your smartphone still in your pocket or bag
- Convenient when your hands are full, or when using a wheelchair or stroller
- Where there is no dedicated tagless gate, you tap as usual
Because you can pay without using your hands, it is also called hands-free fare payment.
2) Where can you use Tmoney Tagless?
Tmoney Tagless launched on the Ui-Sinseol Line in 2023 and has steadily expanded since. As of September 2026, the main service areas are as follows.
| Line | Section | Launched |
|---|---|---|
| Ui-Sinseol Line | Entire line (except Bomun Station) | Sep 2023 |
| Incheon Subway Line 2 | Entire line (27 stations) | Oct 2024 |
| Incheon Subway Line 1 | Entire line (incl. Geomdan extension) | May 2025 |
| Seoul Subway Line 7 | Seoknam–Kkachiul | May 2025 |
| Seoul Subway Line 9 | Gaehwa–Sinnonhyeon | Jul 2026 |
| Seoul city buses | 36 routes (pilot) | Oct 2025 |
Tagless is not yet available at every station and on every bus. Please check in advance whether the lines and stations you use most are supported.
2. How tagless works: your phone and the gate exchange signals
1) Bluetooth recognizes your passage automatically
The core of tagless is Bluetooth Low Energy (BLE) combined with smartphone positioning. A device installed at the gate and your smartphone exchange Bluetooth signals, and your phone’s sensors read your location and direction of travel to register boarding and alighting.
Payment is processed in the following sequence:
- As you approach a station or stop, your phone detects the device’s signal
- Smartphone positioning identifies which gate you pass through
- Passing the gate registers boarding (Be-In)
- Passing the exit gate registers alighting (Be-Out) and charges the fare
This way, everything from boarding to alighting is handled automatically — without ever taking out your phone.
2) Can it tell riders apart when several pass at once?
What matters in tagless is accurately identifying which gate each rider passed through. Tmoney Tagless combines BLE communication with smartphone positioning so that each rider’s passage is recognized correctly, even when many people move through the gates at the same time.
It is also designed so that, once you have been registered as boarded, tapping a card again will not result in a duplicate charge.
3. How is tagless different from contactless?
1) Contactless means tapping the card; tagless means just walking through
Contactless payment is a method in which you hold your card or smartphone close to a reader. There is no physical contact, but you still have to take out your card and tap it every time you pay.
Tagless payment, by contrast, requires no tapping at all — you simply walk through the gate and the fare is charged automatically. That is the biggest difference.
| Category | Tagless | Contactless | QR payment |
|---|---|---|---|
| How to use | Pay simply by passing the gate | Tap a card or phone on the reader | Hold a QR code up to the reader |
| Technology | BLE + smartphone positioning | NFC / RFID | QR code scan |
| What you need | A phone set up in the app | Transit card, bank card, or phone | A QR payment app |
| Passing method | Walk through, no tap | Hold the card near the reader | Open the screen and scan the QR code |
| Example cities | Seoul, Incheon (select lines) | New York, London, Singapore, Tokyo | Major cities in China |
2) Especially handy during rush hour or with your hands full
Tagless removes the need to stop at the gate and pull out a card. During crowded rush hours it helps ease congestion at the gates, and it’s convenient when your hands are full or you’re using a stroller or wheelchair.
Being able to pass through the gate with your smartphone still in your pocket or bag is what makes tagless stand out.
4. Why do New York and London still tap? A city-by-city comparison
1) Seoul and Incheon are the cities that have commercialized tagless
Looking at how major cities around the world handle transit fares, most operate primarily on contactless payment, where you tap a card or phone on a reader. Seoul and Incheon, however, run tagless payment in commercial service on select subway lines.
| City | Service | Payment method |
|---|---|---|
| Seoul / Incheon | Tmoney Tagless | Tagless (BIBO) on select lines, alongside conventional tap |
| New York | OMNY | Contactless — tap a bank card or phone on the reader |
| London | Oyster / contactless | Tap a transit card, bank card, or phone on the reader |
| Singapore | SimplyGo | Contactless — tap a card on the reader |
| Tokyo | Suica | Tap an IC transit card or phone on the reader |
For Seoul and Incheon, the ability to walk through without taking out a card — available on select lines — is what sets them apart from other major cities.
2) Overseas cities moved to contactless first
New York and London have expanded contactless payment, letting riders tap an everyday bank card or smartphone to ride. The advantage is that visitors can board with a card they already carry, without buying a separate transit card.
Tagless, by contrast, requires dedicated signaling devices at gates and on vehicles, plus positioning technology precise enough to tell riders apart when several pass at once. This need for new infrastructure and technical validation is another difference from conventional contactless.
3) In the U.S., hands-free payment is being discussed as the next step
Within the U.S. transit industry, the Be-In Be-Out (BIBO) approach is being discussed as the technology that comes after contactless. In a 2024 guest column in Mass Transit, a Visa mobility executive introduced hands-free payment — paying without tapping a card — as a future direction for transit fare collection.
Tmoney Tagless is a real-world example of this approach already running on subway lines. Being able to pay just by walking through the gate, without taking out your phone, is what distinguishes it from conventional contactless.
5. How to use the Tmoney Tagless transit card
1) On Android, set it up once in the app
The Tmoney Tagless transit card requires no separate card purchase — you set it up in the Mobile Tmoney app on an Android phone. It’s simple to use.
Setup and usage steps:
- Install the Mobile Tmoney app and register a transit card
- Turn on the Tagless feature in the app
- Enable Bluetooth and Location on your phone
- Pass through a dedicated tagless gate, or board a supported bus
After setup, you don’t need to wake the screen or open the app. Just walk through a dedicated tagless gate with your phone in your pocket or bag, and the fare is charged automatically.
2) On iPhone, options are still limited
iPhones cannot yet use tagless through the Mobile Tmoney app.
see iPhone Transit Card: How to Use Tmoney with Apple Pay.
Learn more about how it works: How Tmoney’s Be-In Be-Out (Tagless) Payment Works · Tagless Payment: A Guide to Be-In Be-Out (BIBO)
6. Experience tagless payment now
Tagless payment differs from contactless in that the fare is charged simply by walking through the gate, with no tap on a reader. While New York and London operate mainly on contactless, Seoul and Incheon already offer tagless payment on select subway lines.
If you use an Android phone, set up the Tagless feature in the Mobile Tmoney app. On supported sections such as Line 9 or the Ui-Sinseol Line, you can experience the convenience of passing through the gate without taking out a card.
Get started right now. Install the Mobile Tmoney app and turn on Tagless — that’s all it takes. You can check whether your line is supported in the app’s notices.
7. Frequently Asked Questions (FAQ)
Q1. How does tagless work, in brief?
Your smartphone and the gate exchange Bluetooth Low Energy (BLE) signals to automatically recognize boarding and alighting. The system reads your location and direction of travel to charge the fare.
Q2. What’s the difference between tagless and contactless?
The biggest difference is whether you tap the reader. Contactless requires holding a card or phone close to the reader, while tagless lets you walk through the gate with your phone on you.
Q3. Do I need to buy a separate tagless card?
On Android, just turn on the Tagless feature in the Mobile Tmoney app. iPhone does not support the Mobile Tmoney tagless feature; the sticker-type card is tapped directly on the reader.
Q4. What if the gate doesn’t recognize me?
Simply tap your phone on the reader as usual. Afterward, check your Bluetooth and Location settings, your balance, and your tagless setup.
Q5. Does tagless still apply transfer discounts?
Yes. Tagless applies the same transfer-discount rules as a conventional transit card. On unsupported lines, however, you must tap for boarding and alighting yourself.
Now pay with tagless through Mobile Tmoney and travel more easily!
