Summary
If you make 684,320 kr a year living in the region of Aarhus, Denmark, you will be taxed 115,905 kr. That means that your net pay will be 568,415 kr per year, or 47,368 kr per month. Your average tax rate is 16.9% 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.