Overstaying visas in Taiwan leads to fines. Additionally, it often leads to black marks in your passport, meaning that return to Taiwan is not allowed for a set period of time. Obviously, overstaying is not a good idea.
Extending some visas is an option, but it is not for all visas. The extension must be granted prior to overstaying.
There are a few exceptions to the overstay rule, including Force Majeur, major injury and natural disaster.
The most common reason visitors overstay is due to miscalculating dates. For example, a 60 day visa is NOT the same as two months - some months have 31 days, and February sometimes has 28.
Ministry of Foreign Affairs (Bureau of Consular Affairs, Taichung Branch)
503, LiMing Rd, Sec 2 Taichung City
Hours: Monday ~ Friday 08:30 ~ 17:00
Foreign Affairs Police, Taichung City Police Bureau
588, WenXin (WenShin) Road, Sec. 2 Taichung City
MOFA, Bureau of Consular Affairs - Visa information (open another window)
Foreign Affairs Police, Taichung City Police Bureau (open another window)