Thai Income Tax Calculator is a free Android application developed by Pisanu Chaloemrattanaporn, designed to facilitate the calculation of personal income tax. The program is easy to use and provides the user with the amount of tax that needs to be paid or refunded.

The program supports the new 7-step tax rate that was introduced in 2014, and it can be switched to the old calculation for comparison. Additionally, the discount list is updated every year, and the calculated tax information can be saved for later viewing or comparison with other years.

With its user-friendly design and practical features, Thai Income Tax Calculator is a useful tool for anyone who needs to calculate their personal income tax in Thailand.