Summary
If you make € 18,156,792 a year living in Greece, you will be taxed € 7,987,056. That means that your net pay will be € 10,169,736 per year, or € 847,478 per month. Your average tax rate is 44.0% and your marginal tax rate is 44.0%. This marginal tax rate means that your immediate additional income will be taxed at this rate. For instance, an increase of € 100 in your salary will be taxed € 44, hence, your net pay will only increase by € 56.
Bonus Example
A € 1,000 bonus will generate an extra € 560 of net incomes. A € 5,000 bonus will generate an extra € 2,800 of net incomes.