It's been my first year of work in Taiwan, and my employer also withheld 18% the first 6 months of 2011 and 6% for the rest, which makes a 12% annual average.
However, I found this in the Income Tax Act:
"The tax brackets and rates of consolidated income tax are as follows:
1. If the annual total net consolidated income is less than or equal to NT$ 500,000, the tax rate shall be 5%.
2. If the annual total net consolidated income is above NT$ 500,000 to NT$ 1,090,000, the income tax payable shall be NT$ 25,000 plus 12% for the portion of income more than NT$ 500,000.
3. If the annual total net consolidated income is above NT$ 1,090,000 to NT$ 2,180,000, the income tax payable shall be NT$ 95,800 plus 20% for the portion of income more than NT$ 1,090,000.
4. If the annual total net consolidated income is above NT$ 2,180,000 to NT$ 4,090,000, the income tax payable shall be NT$313,800 plus 30% for the portion of income more than NT$ 2,180,000.
5. If the annual total net consolidated income is above NT$ 4,090,000, the income tax payable shall be NT$ 886,800 plus 40% for the portion of income more than NT$ 4,090,000."
Is this applicable to everybody or only Taiwanese citizens? If yes in my case that would mean a huge refund in May
