Summary
If you make € 4,073,333 a year living in Finland, you will be taxed € 2,559,140. That means that your net pay will be € 1,514,193 per year, or € 126,183 per month. Your average tax rate is 62.8% and your marginal tax rate is 63.2%. 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 € 63.18, hence, your net pay will only increase by € 36.82.
Bonus Example
A € 1,000 bonus will generate an extra € 368 of net incomes. A € 5,000 bonus will generate an extra € 1,841 of net incomes.