Summary
If you make € 677,485,120 a year living in Finland, you will be taxed € 428,020,707. That means that your net pay will be € 249,464,413 per year, or € 20,788,701 per month. Your average tax rate is 63.2% 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.