If you make 50,000,- kr a year living in the region of Københavns, Denmark, you will be taxed 4,000, kr. That means that your net pay will be 46,000,- kr per year, or 3,833,- 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,- kr, hence, your net pay will only increase by 92,- 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.