Summary
If you make 12,478,960 kr a year living in the region of Lolland, Denmark, you will be taxed 6,032,166 kr. That means that your net pay will be 6,446,794 kr per year, or 537,233 kr per month. Your average tax rate is 48.3% and your marginal tax rate is 49.0%. 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 49.03 kr, hence, your net pay will only increase by 50.97 kr.
Bonus Example
A 1,000 kr bonus will generate an extra 510 kr of net incomes. A 5,000 kr bonus will generate an extra 2,549 kr of net incomes.