Summary
If you make 3,000 kr a year living in the region of Kalundborg, Denmark, you will be taxed 1,488 kr. That means that your net pay will be 1,512 kr per year, or 126 kr per month. Your average tax rate is 49.6% and your marginal tax rate is 21.3%. 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 21.34 kr, hence, your net pay will only increase by 78.66 kr.
Bonus Example
A 1,000 kr bonus will generate an extra 787 kr of net incomes. A 5,000 kr bonus will generate an extra 3,933 kr of net incomes.