Summary
If you make 4,124,910 kr a year living in Norway, you will be taxed 1,799,212 kr. That means that your net pay will be 2,325,698 kr per year, or 193,808 kr per month. Your average tax rate is 43.6% and your marginal tax rate is 47.4%. 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 47.40 kr, hence, your net pay will only increase by 52.60 kr.
Bonus Example
A 1,000 kr bonus will generate an extra 526 kr of net incomes. A 5,000 kr bonus will generate an extra 2,630 kr of net incomes.