Summary
If you make 127,809,672 QAR a year living in Qatar, you will be taxed 6,390,484 QAR. That means that your net pay will be 121,419,188 QAR per year, or 10,118,266 QAR per month. Your average tax rate is 5.0% and your marginal tax rate is 5.0%. This marginal tax rate means that your immediate additional income will be taxed at this rate. For instance, an increase of 100 QAR in your salary will be taxed 5 QAR, hence, your net pay will only increase by 95 QAR.
Bonus Example
A 1,000 QAR bonus will generate an extra 950 QAR of net incomes. A 5,000 QAR bonus will generate an extra 4,750 QAR of net incomes.