Summary
If you make 2,555,540 kr a year living in Norway, you will be taxed 1,055,331 kr. That means that your net pay will be 1,500,209 kr per year, or 125,017 kr per month. Your average tax rate is 41.3% 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.