You open Korail Talk (코레일톡), tap your KTX ticket, hit refund, and the amount coming back is thousands of won short of what you paid. Plans for a Friday evening train changed that afternoon, and the app is applying a 20% penalty. That number comes from one thing you can check before you ever book: the day the train leaves. Trains departing Monday through Thursday can be refunded free until 3 hours before departure. Trains departing Friday through Sunday, or on a public holiday, cost a flat 400 won to cancel only until two days before, and the percentage climbs after that.
Two fee tables, picked by the departure day
Korail (코레일) runs the KTX, ITX and Mugunghwa trains, and its passenger terms split refunds into two schedules. The word you will see on the refund screen is 반환 (banhwan), meaning returning the ticket, and the fee taken off is 위약금 (wiyakgeum), the cancellation penalty. The current rates apply to travel dates from May 28, 2025. The full table is in Article 14 of Korail's passenger transport terms (여객운송약관), and as of November 2026 the weekday side has not changed.
| When you cancel | Mon to Thu departure | Fri to Sun or holiday departure |
|---|---|---|
| 2 or more days before | Free | 400 won |
| 1 day before | Free | 5% |
| Departure day, up to 3 hours before | Free | 10% |
| Last 3 hours before departure | 5% | 20% |
| First 20 minutes after departure | 15% | 30% |
| 20 to 60 minutes after | 40% | 40% |
| 60 minutes after, until arrival | 70% | 70% |
| After scheduled arrival | No refund | No refund |
The clock that matters is the departure time printed for your boarding station, compared with the moment you request the refund. On a ticket with a transfer, each leg is timed from its own departure. So my read: on a Monday to Thursday ticket, you can hold off deciding until the morning of travel without losing a won. On a Friday to Sunday ticket, the real deadline is the end of the day two days before you ride, because that is the last point where the penalty is a flat 400 won instead of a share of the fare.
Count backward from your train
Put real times on it. Say you hold a 60,000 won ticket (a round number for the math, not a quoted fare) on an 18:00 train on Friday, December 25, 2026. That date is both a Friday and Christmas, so the stricter column applies either way:
- Through Wednesday, December 23: 400 won comes off.
- Thursday, December 24: 5%, or 3,000 won.
- Friday until 15:00: 10%, or 6,000 won.
- Friday 15:00 to 18:00: 20%, or 12,000 won.
- 18:00 to 18:20: 30%, or 18,000 won. From 18:20 to 19:00 it is 24,000 won, and after 19:00 you get back only 18,000 won until the train arrives.
Move that same ticket to 18:00 on Thursday, December 24, and the picture flips. It stays free until 15:00 that day, then costs 3,000 won until departure, and 9,000 won for the first 20 minutes after the train leaves. If your plans are shaky, booking the Thursday train is the cheaper bet even if you end up wanting Friday.
Once the train has left, the app is no longer the tool. Korail's terms let you refund an online or mobile ticket yourself only until it departs from the boarding station. After that you take the ticket to a staffed station's ticket window, the 매표소 (maepyoso), and the after-departure rates above apply. Small unstaffed stations can't process it, so head for a major station like Seoul, Yongsan or Busan.
A few cases get the penalty waived, and they are worth knowing before you pay one. Korail's waiver list covers a ticket bought on the day of travel and refunded at least 3 hours before departure, in the app, online or at a station. In the app or on the website, if you bought the wrong ticket and buy the correct one within 10 minutes, the refund on the wrong one is waived. At a station window, switching to an earlier train on the same ticket before it departs is also free. If you are at the station early and seats exist on an earlier train, ask at the window rather than refunding and rebooking.
Holiday dates that look like weekdays
The stricter column covers public holidays, not just Friday to Sunday, and the next few months have holidays falling on Mondays and a Tuesday. These come from the 2027 calendar data published by the Korea Astronomy and Space Science Institute:
- Friday, January 1, 2027: New Year's Day, already a Friday.
- Saturday, February 6 to Monday, February 8, 2027: Seollal (설날), the Lunar New Year holiday.
- Tuesday, February 9, 2027: substitute holiday (대체공휴일, daeche gonghyuil) for Seollal falling on a Sunday.
- Monday, March 1, 2027: Independence Movement Day (삼일절, Samiljeol).
A Monday, February 8 or Tuesday, February 9 ticket feels like a weekday ticket, but plan for the 400 won, 5%, 10%, 20% scale. Korean law counts a substitute holiday as a public holiday, so I wouldn't count on the free weekday window for February 9.
This all applies to tickets bought from Korail directly. SRT trains out of Suseo station are run by a different operator with its own refund page, and seats booked through a travel agency or with a KORAIL PASS follow the seller's or the pass's terms. Check where your ticket came from before using this table.
If you are holding a Friday, weekend or holiday ticket right now, put a reminder in your phone for the evening two days before departure, and decide by then.
Sources checked November 4, 2026
- Korail, Passenger Transport Terms (여객운송약관), revised April 18, 2025, Article 14 and annex
- Korail, Penalty waiver cases and scope (위약금 감면대상 및 범위)
- Korea Astronomy and Space Science Institute, 2027 calendar data (월력요항), public holidays
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