Hi....What would the personal income tax be in THB if one's salary is THB250,000 per month?

Thanks

You can check the tax tables here > http://www.rd.go.th/publish/6045.0.html it's pretty straightforward calculation.

You can check the tax tables here > http://www.rd.go.th/publish/6045.0.html it's pretty straightforward calculation.

Does this mean that if he salary is THB3,250,000 per annum, he falls in the 30% bracket and therefore the annual tax would be THB975,000?

No, first of all you will be able to make allowable deductions

Second it is a sliding scale and you use the rate for the amount in that tax braket before moving up to the next tax bracket...

First 150,000 is tax free

150-500 is taxed at 10% = 35,000

500-1000 is taxed at 20% = 100,000

1 mil - 3.2 mil is taxed at 30% - 660,000

Aprox total: 800,000 (may vary based upon your allowable deductions)

The OP doesn't state nationality, but if an American he/she would have to file a US tax return as well. Depending on the exchange rate, THB 250,000 per month would be very near the amount allowable to be excluded, hence, if an American some US tax may be owing on the income as well as Thai tax. If a Brit, from a tax point of view, just born lucky.