If you make 300,000,- kr a year living in the region of Langeland, Denmark, you will be taxed 108,341, kr. That means that your net pay will be 191,659,- kr per year, or 15,972,- kr per month. Your average tax rate is 36.1% and your marginal tax rate is 42.7%. 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 42.73,- kr, hence, your net pay will only increase by 57.27,- kr.
A 1,000,- kr bonus will generate an extra 573,- kr of net incomes. A 5,000,- kr bonus will generate an extra 2,864,- kr of net incomes.