Summary
If you make 609,912 kr a year living in the region of Roskilde, Denmark, you will be taxed 204,483 kr. That means that your net pay will be 405,429 kr per year, or 33,786 kr per month. Your average tax rate is 33.5% and your marginal tax rate is 39.0%. This marginal tax rate means that your immediate additional income will be taxed at this rate. For instance, an increase of 100 kr in your salary will be taxed 38.97 kr, hence, your net pay will only increase by 61.03 kr.
Bonus Example
A 1,000 kr bonus will generate an extra 610 kr of net incomes. A 5,000 kr bonus will generate an extra 3,052 kr of net incomes.