If you make 300,000,- kr a year living in the region of Svendborg, Denmark, you will be taxed 106,153, kr. That means that your net pay will be 193,847,- kr per year, or 16,154,- kr per month. Your average tax rate is 35.4% and your marginal tax rate is 41.8%. 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 41.81,- kr, hence, your net pay will only increase by 58.19,- kr.
A 1,000,- kr bonus will generate an extra 582,- kr of net incomes. A 5,000,- kr bonus will generate an extra 2,910,- kr of net incomes.