If you make 300,000,- kr a year living in the region of Kerteminde, Denmark, you will be taxed 105,293, kr. That means that your net pay will be 194,707,- kr per year, or 16,226,- kr per month. Your average tax rate is 35.1% and your marginal tax rate is 41.5%. 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 41.46,- kr, hence, your net pay will only increase by 58.54,- kr.
A 1,000,- kr bonus will generate an extra 585,- kr of net incomes. A 5,000,- kr bonus will generate an extra 2,927,- kr of net incomes.