Effortless Car Rentals at Tainan Airport (TNN)

You need BOTH your valid US driver's license AND an International Driving Permit (IDP). Taiwan requires an IDP for all foreign visitors — your US license alone isn't sufficient. The IDP costs about $20-$25 USD through AAA or the USPS. Without it, rental companies will refuse to hand over the keys, and local police can fine you on the spot.

Taiwan's highways use an electronic toll collection (ETC) system. Most rental cars come with a transponder pre-installed — confirm this at pickup. Tolls are calculated by distance and typically run NT$0.8–1.2 per kilometer (roughly $1.50-$2.50 USD for a 100km trip). If no transponder, you pay manually at toll booths, but these are becoming rarer. Renting a transponder through the rental company usually costs NT$50-100 per day — worth it for highway travel.

Yes, drivers under 25 typically pay a young driver surcharge of NT$200-350 per day (about $6-11 USD). Some companies set the minimum age at 21, but budget agencies may require 25. Always check the age policy before booking. At 22, you're eligible but will pay a premium — budget an extra $150-300 USD for a one-week rental.

Parking in Tainan's historic downtown (near Guangrong Street, Shennong Street) is notoriously difficult. Street meters charge NT$20-40 per hour, operate 8am-10pm daily. City parking lots run NT$30-60 per hour. During weekends and holidays, lots fill by 10am. Pro tip: book accommodation with free parking if you plan to explore old Tainan by car — driving and circling for spots is frustrating.

Basic rental insurance (CDW) typically covers collision damage but often excludes flood damage to the engine and interior. For Taiwan's wet season (May-October), especially during typhoons, consider purchasing full coverage (FDW/Extended Protection) — about NT$150-300 per day. If you decline and flood water ruins the engine, you could be liable for NT$50,000-100,000+ in repairs. When heavy rain hits, avoid low-lying roads near the Zengweng River area.

Unleaded gasoline (92, 95, 98 octane) is standard — just match what your rental car's label specifies. Gas stations are plentiful on highways and in urban areas, but in rural Tainan County, distances between stations can stretch to 20-30km. Most stations are self-serve. Fill up before heading to scenic areas like Kenting or Alishan. Taiwan's fuel prices hover around NT$30-35 per liter (roughly $3.50-4.00 USD per gallon).