Summary
If you make 421,200 kr a year living in the region of Lolland, Denmark, you will be taxed 142,094 kr. That means that your net pay will be 279,106 kr per year, or 23,259 kr per month. Your average tax rate is 33.7% and your marginal tax rate is 36.5%. 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 36.46 kr, hence, your net pay will only increase by 63.54 kr.
Bonus Example
A 1,000 kr bonus will generate an extra 635 kr of net incomes. A 5,000 kr bonus will generate an extra 3,177 kr of net incomes.