First, figure out what time you actually land
Your options depend less on "is it late" and more on the exact clock time against the last scheduled services for that specific night. The Airport MRT runs a limited daily schedule rather than around the clock -- Taoyuan Metro Corporation's own timetable shows the first Taipei-bound departures around 5:30am and the last airport-bound trains before midnight, though exact times shift and should be checked for your travel date. The same general pattern holds for most of the express and regional bus lines that connect the airport to Taipei. A flight landing at 11pm gives you a very different set of choices than one landing at 3am, even though both feel like "late arrival" from the passenger's seat.
Once you're through immigration and baggage claim, look for the transport information counter or the digital displays near the arrivals exit. These usually show whether the MRT and key bus routes are still running that night, which is more reliable than guessing from a schedule you looked up before you flew, since schedules and last-service times do change.
Your options from here
If a bus or the Airport MRT is still running
Some routes to Taipei keep operating later than others, and a handful of long-distance or airport shuttle buses run limited late-night or early-morning departures on selected routes. If a screen or staff member confirms a service is still running to somewhere near where you're staying, this is normally the cheapest way into the city. Confirm the exact last departure time and stop before you queue, since "still running" and "has one more departure in ten minutes" are different situations.
If everything scheduled has already stopped
This is where most true late-night arrivals end up. From here you have two practical paths:
A metered taxi to central Taipei is the direct option if you need to be somewhere specific that night — an early meeting, a hotel with a firm check-in, or simply a strong preference for a real bed over an airport bench. Ask the taxi counter or dispatcher for a fare estimate before you get in, and confirm whether a late-night or airport surcharge applies on top of the meter, since surcharge rules and amounts are set by the operator and can change.
Waiting inside the terminal is the other real option, and it's a normal choice, not a last resort. If your first commitment in Taipei isn't until mid-morning, sitting out a few hours in the arrivals hall or a terminal seating area and taking the first MRT or bus once service resumes can save you the cost of a late taxi and the hassle of an early hotel check-in you'd have to pay extra for anyway.
If you decide to wait it out
Waiting a few hours overnight is more comfortable with a plan than without one. Look for a seating area near a power outlet before you settle in, since you'll want your phone charged for both navigation and communication once you do move. Some food and beverage counters keep limited overnight hours, though not all of them do, so don't assume a shop you see on arrival will still be open two hours later; check its posted hours rather than walking back expecting it to be there.
If your connecting flight or first commitment is genuinely early, calculate backward from the first MRT or bus departure rather than from when you land. Arriving at 1am with a first train around dawn is a very different wait than arriving at 4am with the same first train, and knowing the gap in advance helps you decide whether waiting is actually more comfortable than a taxi.
If you'll need Taiwan dollars for a taxi or for the wait, sort out cash or a working card before you leave the arrivals area. Currency exchange counters and ATMs are generally available in the arrivals hall, but hours can be more limited overnight than during the day, so check while you're still in that area rather than after you've moved on.
What usually goes wrong
Travelers usually go wrong in one of two ways: assuming the airport transport they researched weeks earlier still runs at the same hours, or assuming an unmarked driver offering a ride is a legitimate taxi. Both are avoidable. Re-check the current schedule after landing rather than trusting an old search result, and use the marked taxi queue or an airport-approved dispatch counter rather than accepting an approach in the arrivals area.
A smaller but common problem is arriving with heavy luggage and no plan for it during a multi-hour wait. Airport lockers, where available, are not guaranteed to be staffed or accessible at every hour, so don't count on offloading your bags overnight unless you've confirmed that specific service is open. Keep your bags with you and choose a seating area near an outlet if you plan to wait it out.
If you need help
Staff at the arrivals-level information counters can tell you, in real time, which transport options are still running and where the current taxi queue is. If you can't find a staffed counter nearby, the customer service points at each terminal and the digital information screens are the next-best source — treat printed schedules from before your trip as a starting point, not the final word for tonight.
What this guide does not cover
This guide covers general late-night options at Taoyuan Airport and does not cover terminal-by-terminal transfer directions, specific fare amounts, or exact last-departure times, since these are set by the operators and change over time. It also doesn't cover arrivals at Taipei Songshan Airport, which is a separate airport serving different routes.