Gangnam robotaxi vs metered taxi: the flat fare wins past 1.6 km

Last verified Sep 18, 2026

By Seungyeop Yeom · Sep 20, 2026

Between 22:00 and 05:00 on a weeknight, inside Gangnam’s roughly 20.4 km² autonomous-driving pilot zone, Kakao T’s “서울자율차” (Seoul Self-Driving Car) option charges a flat fare of 4,800 to 6,700 KRW depending on the hour, no matter how far you actually travel. A metered taxi charges the same starting amount for the first 1.6 km, then keeps adding to it. That single difference is the whole decision: once your ride runs longer than 1.6 km, in the same hour and the same zone, the robotaxi already costs the same or less than the taxi next to it.

This only applies Monday through Friday, from 22:00 to 05:00 the following morning, and only with pickup and drop-off inside the pilot zone. Outside those windows, or outside the zone, you are back to a regular taxi, with no flat fare involved.

What each hour actually costs

Seoul’s transport office publishes both fare schedules on the same city notice pages: one for the autonomous taxi, one for ordinary medium taxis. Line them up by time band and the match is exact at the base distance.

Time window	Robotaxi flat fare	Metered taxi, first 1.6 km	Metered taxi, each 131 m or 30 sec after that
22:00–23:00	5,800 KRW	5,800 KRW	120 KRW
23:00–02:00	6,700 KRW	6,700 KRW	140 KRW
02:00–04:00	5,800 KRW	5,800 KRW	120 KRW
04:00–05:00	4,800 KRW	4,800 KRW	100 KRW

The 04:00–05:00 row uses the daytime rate. Seoul’s fare notice lists late-night surcharge windows only for 22:00–23:00, 23:00–02:00 and 02:00–04:00, which together cover 22:00 to 04:00 and stop there. It does not list a fourth surcharge band for 04:00–05:00, so a metered taxi in that hour charges the plain daytime figures: 4,800 KRW to 1.6 km, then 100 KRW per 131 m.

In every row, the robotaxi’s flat fare equals the taxi’s base fare for the first 1.6 km. That match isn’t something Seoul needs to confirm separately: it is the number printed in both schedules, and it means the robotaxi never charges more than that base amount while the taxi never charges less than it. So the entire comparison comes down to one question: is your ride longer than 1.6 km?

The math on a real ride

Take a ride in the 23:00–02:00 band, the most expensive hour for both options, that runs 1,310 m past the 1.6 km base distance.

The metered taxi starts at 6,700 KRW for the first 1.6 km, and the extra 1,310 m adds on top of that: ten steps of 131 m, each costing 140 KRW at 23:00–02:00. Ten steps beyond the base distance add 1,400 KRW to the meter (10 × 140 KRW).

That brings the metered total to 8,100 KRW for the ride.

The robotaxi charges its flat 6,700 KRW for the same distance, in the same hour, in the same zone. Riding the robotaxi instead saves 1,400 KRW on this one trip, and the saving only grows the farther you go past 1.6 km, because the taxi keeps adding 140 KRW per 131 m and the robotaxi does not add anything at all.

Run the same shape of comparison in the 22:00–23:00 or 02:00–04:00 band and the per-step charge drops to 120 KRW instead of 140 KRW, but the pattern is identical: past 1.6 km, the robotaxi is flat and the taxi is climbing.

Who this saves money for

If your ride runs Monday through Friday night, between 22:00 and 05:00 the next morning, with both the pickup and the drop-off inside the Gangnam pilot zone → the robotaxi option is available to you.
If that ride covers more than 1.6 km → the flat fare already matches or beats the metered taxi, so take the robotaxi.
If the ride is under 1.6 km → the flat fare equals the metered base fare exactly, so neither option is cheaper than the other.
If you are traveling on a Saturday or Sunday night → the service is not running at all; you need a regular taxi.
If you have not registered a payment card inside the Kakao T app before you leave for the night → you cannot open the robotaxi option when you need it.

Where riders get tripped up

The app requires a payment card registered in advance. Seoul’s own notice says only that a card must be entered in the app before riding; it does not say whether cash or paying the safety driver directly is possible as a backup, and no official page fills that gap.

Foreign-issued cards can be the actual failure point. One independent guide to Kakao T in Korea (not an official Kakao or Seoul source, so treat it as a secondhand report) describes overseas cards failing to register because of Korea’s domestic identity-verification step tied to the payment gateway. For a regular metered taxi, the same guide describes a workaround of paying the driver directly with cash, a physical foreign card, or a T-money card. Whether that same workaround exists for the robotaxi has no official confirmation either way.

The schedule is weekdays only. Seoul’s notice sets the hours as Monday through Friday, 22:00 to 05:00 the next day. There is no mention of what happens on public holidays that fall on a weekday, so if your trip lands on one, do not assume the service is running or that it is not; the city has not said.

The zone edge is also undocumented. Seoul’s notice confirms the service runs inside the roughly 20.4 km² pilot zone, but it does not say what the Kakao T app does if your pickup or drop-off falls just outside that boundary, whether the robotaxi option simply will not appear or something else happens. Build your route with both ends clearly inside the zone rather than testing the edge.

How to hail one from Kakao T

Confirm the timing and the route first: Monday through Friday, 22:00 to 05:00 the next morning, with pickup and drop-off inside the Gangnam pilot zone (about 20.4 km²).
Open Kakao T, the regular Korean taxi-hailing app, tap to call a taxi, enter your pickup and destination, then select the “서울자율차” option in the list of ride types. See Seoul’s own notice for the current details: https://news.seoul.go.kr/traffic/archives/516542
Register a payment card in the app ahead of time. Do this before the night you plan to ride, not at the curb, since no confirmed backup payment method exists if the card fails.
Expect up to three passengers in one vehicle, with a safety driver on board at all times: https://english.seoul.go.kr/gangnam-late-night-autonomous-taxi-to-begin-paid-service-in-april-alongside-fleet-expansion/
At drop-off, the app charges only the flat fare for that hour, 4,800, 5,800 or 6,700 KRW depending on when you rode. No distance or time charge is added on top.

The service has been running long enough to have a track record: as of February 28, 2026, Seoul recorded 7,754 total rides with zero accidents attributed to the autonomous driving technology itself. The fleet has also grown since the free pilot, from three vehicles to seven in March 2026 and to nineteen by August 2026, spread across two operators.

Where to book

There is nothing to reserve here. The robotaxi is not a ticket or a package you buy ahead of your trip; it is a ride type you select live, inside Kakao T, on the night you actually want it, the same way you would call any other taxi from that app. The flat fare above is the entire cost. There is no booking fee, no deposit, and no separate page to purchase from.

If you already have Kakao T installed for regular taxis in Seoul, the robotaxi option costs you nothing extra to try, on the nights and in the zone where it runs. If you do not have the app yet, install it and register your payment card before your first late night in Gangnam, so the option is ready to use rather than something you discover you cannot access at 23:00 on the sidewalk.