A comprehensive guide to how the Swiss tax system works for (foreign) individuals and companies.

Taxes are levied on three levels (federal / cantonal / municipal level) and the delimitation of taxation powers is governed by the Federal Constitution.

Personal income tax and wealth tax in Switzerland:
1) Unlimited and limited tax liability:
      Resident individuals or temporary residents performing gainful activities in Switzerland are subject to unlimited (worldwide) tax liability, if tax treaty provisions do not override this taxation right. Limited tax liability applies to non-residents who have specific economic relations with Switzerland.
2)Net taxable income and wealth:
   The federation and all cantons and municipalities levy a general income tax. A supplementary wealth tax is due on the cantonal and municipal level if net wealth exceeds a certain threshold.
3)Family taxation:
     Swiss tax laws are based on the principle that the income and wealth of a family represent an economic unit that is taxed together. Consequently, the income and wealth of both spouses in a joint household (and, as a rule, also the income and wealth of under-aged children) are aggregated to the income of the person who exercises parental authority.

Tax assessment of individuals in Switzerland:
1)Ordinary tax assessment
2)Subsequent ordinary tax assessment

http://www.expatica.com/ch/finance/Taxes-in-Switzerland_101589.html