Summary
If you make € 3,375,840 a year living in Luxembourg, you will be taxed € 1,590,755. That means that your net pay will be € 1,785,085 per year, or € 148,757 per month. Your average tax rate is 47.1% and your marginal tax rate is 47.2%. 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 € 47.18, hence, your net pay will only increase by € 52.82.
Bonus Example
A € 1,000 bonus will generate an extra € 528 of net incomes. A € 5,000 bonus will generate an extra € 2,641 of net incomes.