If you make 300,000,- kr a year living in the region of Jammerbugt, Denmark, you will be taxed 104,355, kr. That means that your net pay will be 195,645,- kr per year, or 16,304,- kr per month. Your average tax rate is 34.8% and your marginal tax rate is 41.1%. 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 41.07,- kr, hence, your net pay will only increase by 58.93,- kr.
A 1,000,- kr bonus will generate an extra 589,- kr of net incomes. A 5,000,- kr bonus will generate an extra 2,947,- kr of net incomes.