A postpaid transit card lets you ride without a charged balance, but it is not automatically added to any card. The application method differs by card type, and missing the registration deadline after you receive the card can block your transit use.

Postpaid cards bill fares to your card statement instead of a balance

Unlike a prepaid card like T-money, a postpaid transit card adds your fares to that month's card bill instead of deducting from a charged balance, useful if you do not want to worry about running out mid-ride. But missed payments or exceeding your credit limit can suspend the transit function along with the card.

Apply for the transit function when you get a credit card

Request the transit function when applying for a new credit card, or ask your card issuer whether it can be added to a card you already hold. Support and process vary by issuer, so check with your current card company before applying for a new one.

Debit cards need a small-credit-limit add-on service

A debit card needs either credit status or a small credit limit add-on service to support postpaid transit. If you apply for a debit card that offers postpaid transit as an option, include the transit function in your application, or contact your card issuer to add it to an existing card.

Register your card within 10 days of receiving it

For example, a postpaid Climate Card must be registered with an account and card on the official T-money Card and Pay site for its monthly cap to apply correctly. You are typically given up to 10 days after receiving the card to use postpaid transit without registering, but not registering after that period can get your transit use blocked. Register as soon as you receive the card.

Frequently Asked Questions

Can a debit card support postpaid transit?

Yes, if it has a small-credit-limit add-on service or includes the transit function at application. Check with your card issuer.

Can I use postpaid transit right after receiving the card?

You are usually given about 10 days without registering, but use can be blocked afterward if you skip registration. Register on the issuer's site as soon as you get the card.

Can I add the transit function to a credit card I already have?

Some issuers allow re-issuing or adding it to an existing card. Contact your card issuer directly to confirm.

Source and Use Notes

This page summarizes published data for planning. Actual station conditions can differ, so verify them on site.