Thailand's Tax Rate

1. Progressive Tax (Thailand, 2014) -
   100000 - 0 - 0%
   500000 - 27500 - 5.5%
   1000000 - 115000 - 11.5%
   5000000 - 1315000 - 26.3%
2. Proportional Tax (30%) -
   500000 - 150000
   1000000 - 300000
3. Regressive Tax (30%) -
   100000 - 7.20%
   1000000 - 0.72%

1. Tax Rates in Thailand (2014) - http://www.rd.go.th/publish/6045.0.html - Section 3
2. Tax Rates in Thailand (Old) - 0% for 0-150k, 10% for 150k-500k, 20% for 500k-1m, 30% for 1m-4m, and 37% for 4m and beyond.

Most importantly, the new tax rates split up the larger brackets from 0-1 million into much smaller ones, which makes for lower average rates on lower incomes. Additionally, they also break up the multimillion brackets and have adding increments of 5%. These changes essentially result in tax cuts across the board for all income levels for 2014. The lowered taxes could have been established to increase aggregate demand by encouraging consumption and working.