Understand your Swiss taxes

Plain-language guides, written for tax year 2025 and verified against the federal circular and Canton Zurich guidance. No jargon, no assumed knowledge.

Swiss tax at source (Quellensteuer), explainedWho pays it, what your monthly deduction already covers, and when you must file anyway.Read the guide The voluntary tax return in Zurich: a decision you can't undoFiling can get you money back every year. It can also lock you in. How to decide before March 31.Read the guide Tax deductions in Zurich for 2025: what you can actually claimPillar 3a, commuting, meals, insurance, education and donations, with the official caps.Read the guide Tax return deadlines in Zürich, and how to get more timeThe 31 March rule, what your commune extends to September or November, and the one date that cannot move.Read the guide Your first tax return after moving to ZürichWho files in the first year, what the tax office sends, how a part year is taxed, what to keep from day one.Read the guide Your tax at source tariff code, explainedWhat A0N or C1Y on your payslip means, when it is wrong, and how to get it corrected by 31 March.Read the guide