Why you need to pay more tax than the first year in Korea?
I Have a lot of questions from E-2 VISA holder for this question, even having a less income than the 1st year in Korea and get a higher tax bill on the 2nd year.
For the 1st year, your return type is "단순경비율", NTS assumed your deductible expenses around 50-60% and your tax basis will be very lower, I mean your effective tax rate will be less than 3%, so if you paid 3.3% tax during the year as a independent contractor, you can get some refund.
For the 2nd year, your return type will be "기준경비율(간편장부대상자)", so if you didn't file with a simple bookkeeping service, your deductible expenses are reduced around 19-23%, and it makes your tax bill higher than the 1st year.
More details, please contact me to firstname.lastname@example.org always, jz