Summary
If you make Ft 665,600,000 a year living in Hungary, you will be taxed Ft 123,136,000. That means that your net pay will be Ft 542,464,000 per year, or Ft 45,205,333 per month. Your average tax rate is 18.5% and your marginal tax rate is 18.5%. This marginal tax rate means that your immediate additional income will be taxed at this rate. For instance, an increase of Ft 100 in your salary will be taxed Ft 18.50, hence, your net pay will only increase by Ft 81.50.
Bonus Example
A Ft 1,000 bonus will generate an extra Ft 815 of net incomes. A Ft 5,000 bonus will generate an extra Ft 4,075 of net incomes.