How is individual income tax (IIT) calculated in Asia?

In Asian countries individuals are taxed according their salary. Therefore those with a higher salary will have to pay higher taxes. However, rates vary in different Asian countries and could be anywhere between 17 and 45%.

Exceptions of this are Brunei which does not have any individual income tax (IIT) and Cambodia where the rate is fixed at 20% no matter how high or low your income is.