Summary
If you make 665,700 kr a year living in the region of Thisted, Denmark, you will be taxed 235,587 kr. That means that your net pay will be 430,113 kr per year, or 35,843 kr per month. Your average tax rate is 35.4% and your marginal tax rate is 49.1%. 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 49.07 kr, hence, your net pay will only increase by 50.93 kr.
Bonus Example
A 1,000 kr bonus will generate an extra 509 kr of net incomes. A 5,000 kr bonus will generate an extra 2,547 kr of net incomes.