I’ve been asked this question several times, but I couldn’t answer every e-mail regarding this. Thankfully, Korea Times uploaded an article on this.
In Seoul alone, 11,967 cases of private tutoring have been registered with education offices in the city. Among them, 76 have been made by foreigners holding F-series visas such as the F-2 (spouses of Koreans), F-4 (ethnic Koreans) and F-5 (permanent residence). Most of them are teaching English.
Under the Immigration Law, foreigners with other visa types are not allowed to offer private tutoring to make money, except for those with student status, who can do so with restricted hours upon approval from their professors . Otherwise, foreign nationals are subject to fines and deportation.
There you go. Only foreigners with F-series visas could LEGALLY offer private tutoring. Those with student visas may also do with approval from their professors.
Like it said in the article, other visa holders may be subjected to fines and deportation. One might just be working to pay for fines, as it doesn’t seem to be covered by any life insurance. 😉