Summary
If you make KSh 40,732,640 a year living in Kenya, you will be taxed KSh 12,154,512. That means that your net pay will be KSh 28,578,128 per year, or KSh 2,381,511 per month. Your average tax rate is 29.8% and your marginal tax rate is 30.0%. This marginal tax rate means that your immediate additional income will be taxed at this rate. For instance, an increase of KSh 100 in your salary will be taxed KSh 30, hence, your net pay will only increase by KSh 70.
Bonus Example
A KSh 1,000 bonus will generate an extra KSh 700 of net incomes. A KSh 5,000 bonus will generate an extra KSh 3,500 of net incomes.