Summary
If you make 659,988 kr a year living in the region of Aarhus, Denmark, you will be taxed 224,590 kr. That means that your net pay will be 435,398 kr per year, or 36,283 kr per month. Your average tax rate is 34.0% and your marginal tax rate is -387.5%. 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 -387.51 kr, hence, your net pay will only increase by 488 kr.
Bonus Example
A 1,000 kr bonus will generate an extra 4,875 kr of net incomes. A 5,000 kr bonus will generate an extra 24,376 kr of net incomes.