P’Jeab ka,
As your requested ka, I attach the “T06_Tax on Tax calculation worksheet”. This is used for Expat’s withholding tax calculation. For Thai External consultant, it will be calculated as same as our employee.
In addition, I also attach the “Taxable income analysis worksheet”. This is used for tax checklist regarding employee benefit both employee and employer side. I already filled in for employer side. It will be great if HR fill in for employee side and we will use this checklist for our decision making.
If you have any questions, please feel free to let me know.