Withholding Tax (Quellensteuer) Guide for B & L Permit Holders

Under the Swiss Federal Direct Tax Act (DBG) and the cantonal withholding tax ordinances (QStV), your employer applies a standardized monthly tax tariff based on your household status on the final day of each payroll period.

The four primary withholding tax tariffs in Switzerland are: Tariff A (Single, divorced, or widowed individuals without dependent children); Tariff B (Married couples with a sole earner); Tariff C (Married couples where both spouses work in Switzerland); and Tariff H (Single individuals or single parents living with dependent children).

Under Swiss tax harmonization law (StHG), if your gross worldwide Swiss employment income reaches or exceeds CHF 120,000 in a calendar year (or if you hold worldwide taxable wealth exceeding cantonal wealth thresholds), you are legally subject to mandatory Subsequent Ordinary Assessment (Nachträgliche ordentliche Veranlagung - NOV).

Once you cross this threshold, your cantonal tax administration (Kantonales Steueramt / Administration fiscale cantonale) will issue a formal tax declaration. You remain in the ordinary tax system for all subsequent years until you leave Switzerland.

If your gross annual income is below CHF 120,000, you are taxed definitively by Quellensteuer by default. However, you can submit a voluntary application for subsequent ordinary assessment (NOV) to claim additional itemized deductions.

Voluntary filing is highly advantageous if you make maximum contributions to Pillar 3a, make voluntary 2nd Pillar pension buybacks (BVG-Einkauf), incur substantial out-of-pocket medical costs exceeding 5% of income, or pay high Swiss childcare costs (KITA).

Crucial Warning: An application for voluntary NOV is irrevocable. Once submitted, you will be assessed under ordinary tax rules in all future years, even if your tax burden increases due to living in a high-multiplier municipality.