Summary
If you make 421,044 kr a year living in the region of Slagelse, Denmark, you will be taxed 137,014 kr. That means that your net pay will be 284,030 kr per year, or 23,669 kr per month. Your average tax rate is 32.5% and your marginal tax rate is 35.1%. 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 35.10 kr, hence, your net pay will only increase by 64.90 kr.
Bonus Example
A 1,000 kr bonus will generate an extra 649 kr of net incomes. A 5,000 kr bonus will generate an extra 3,245 kr of net incomes.