Summary
If you make 3,478 kr a year living in the region of Gladsaxe, Denmark, you will be taxed 1,588 kr. That means that your net pay will be 1,890 kr per year, or 158 kr per month. Your average tax rate is 45.7% and your marginal tax rate is 21.0%. 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 21 kr, hence, your net pay will only increase by 79 kr.
Bonus Example
A 1,000 kr bonus will generate an extra 790 kr of net incomes. A 5,000 kr bonus will generate an extra 3,950 kr of net incomes.