Selling my condo, how to calculate the transfer fees and taxes?

I had a look through some of the recently posted messages and replies but simply don't understand the personal income tax calculation.Is it calculated progressively? I have owned my condo for 8 years and am considering selling it for THB 6,5 mio. I understand the transfer fee of 2%, the stamp duty of 0,5%, no need for the specific business tax having owned my condo for 8 years - right - but am not sure about the personal income tax I will expect to pay. Appreciate any help you can extend and best regards, D