Summary
If you make 671,591 kr a year living in the region of Aarhus, Denmark, you will be taxed 172,793 kr. That means that your net pay will be 498,798 kr per year, or 41,566 kr per month. Your average tax rate is 25.7% and your marginal tax rate is -446.9%. 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 -446.92 kr, hence, your net pay will only increase by 547 kr.
Bonus Example
A 1,000 kr bonus will generate an extra 5,469 kr of net incomes. A 5,000 kr bonus will generate an extra 27,346 kr of net incomes.