If you make CHF 4'000 a year living in the region of Zurich, Switzerland, you will be taxed CHF 249. That means that your net pay will be CHF 3'751 per year, or CHF 313 per month. Your average tax rate is 6.2% and your marginal tax rate is 6.2%. This marginal tax rate means that your immediate additional income will be taxed at this rate. For instance, an increase of CHF 100 in your salary will be taxed CHF 6.20, hence, your net pay will only increase by CHF 93.80.
A CHF 1'000 bonus will generate an extra CHF 938 of net incomes. A CHF 5'000 bonus will generate an extra CHF 4'690 of net incomes.
NOTE* Withholding is calculated based on the Zurich tables of Switzerland, 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.