If you make 20,000,- kr a year living in the region of Skanderborg, Denmark, you will be taxed 1,600, kr. That means that your net pay will be 18,400,- kr per year, or 1,533,- kr per month. Your average tax rate is 8.0% and your marginal tax rate is 8.0%. 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 8.01,- kr, hence, your net pay will only increase by 91.99,- kr.
A 1,000,- kr bonus will generate an extra 920,- kr of net incomes. A 5,000,- kr bonus will generate an extra 4,600,- kr of net incomes.