National Insurance Contribution
If you make 400,000 kr a year living in Norway, you will be taxed 89,598 kr. That means that your net pay will be 310,402 kr per year, or 25,867 kr per month. Your average tax rate is 22.4% and your marginal tax rate is 34.0%. 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 34 kr, hence, your net pay will only increase by 66 kr.
A 1,000 kr bonus will generate an extra 660 kr of net incomes. A 5,000 kr bonus will generate an extra 3,300 kr of net incomes.
NOTE* Withholding is calculated based on the tables of Norway, income tax. For simplification purposes some variables (such as marital status and others) have been assumed. This document does not represent legal authority and shall be used for approximation purposes only.