Switzerland tax residency: 30/90-day stay, lump-sum taxation, and cantons
Switzerland taxes at federal, cantonal and municipal levels. The 30-day work and 90-day stay tests trigger residency, and lump-sum taxation is available.
Switzerland is famously decentralized: tax residency triggers federal, cantonal, and municipal taxation, and the rate varies dramatically by canton. Geneva and Zurich are high-tax; Zug and Schwyz are lower. Becoming a Swiss tax resident is easier than most people realize, short stays can trigger residency.
Swiss residency tests
You become a Swiss tax resident if either applies:
- 30-day test: you stay in Switzerland for at least 30 days for paid work (or 90 days without paid work).
- Domicile test: you have your domicile in Switzerland, your true center of life.
Switzerland's 30-day work threshold is low. A consultant who spends 5 weeks in Zurich for a project can become Swiss-resident, with tax obligations at federal, cantonal, and municipal levels.
What counts as a Swiss day
Any presence on a calendar day counts. Brief absences (a weekend trip to France or Italy) don't break the count. The 30-day work or 90-day stay can be continuous or interrupted by short absences.
Cantonal tax rate variation
Effective rates vary by canton:
| Canton | Approximate top combined rate |
|---|---|
| Zug | ~22% |
| Schwyz | ~22% |
| Nidwalden | ~24% |
| Zurich | ~40% |
| Geneva | ~45% |
| Vaud | ~41% |
The disparity is significant. High earners often choose Zug, Schwyz, or Nidwalden for the favorable rates.
Lump-sum taxation (forfait fiscal)
Switzerland offers lump-sum taxation (forfait fiscal) to qualifying foreigners. Tax is computed on a deemed lifestyle expense rather than actual income. To qualify:
- Foreign citizen.
- First-time Swiss resident or returning after a 10-year absence.
- No paid employment in Switzerland.
- Minimum federal-level base of CHF 400,000 plus cantonal minimums.
Some cantons (Zurich, Basel-Stadt, Schaffhausen) have abolished cantonal lump-sum taxation. Most others retain it. The regime is popular with retirees, family-office principals, and others with primarily foreign income.
Track Swiss days correctly
Tax Days tracks Swiss days against the 30-day work and 90-day stay thresholds. For consultants and project workers, the rolling-window logic correctly handles interrupted stays.
Frequently asked questions
How many days can I stay in Switzerland before becoming a tax resident?
Generally, staying at least 30 days in Switzerland with paid work, or 90 days without paid work, triggers Swiss tax residency. You can also become resident under the domicile test if Switzerland is your true center of life. Staying below those day thresholds and keeping your domicile elsewhere typically avoids residency.
Can a short work assignment make me a Swiss tax resident?
Yes, it can. The 30-day threshold for paid work is low: a consultant who spends 5 weeks in Zurich on a project can generally become Swiss-resident, with tax obligations at the federal, cantonal, and municipal levels.
Do short trips outside Switzerland reset the Swiss day count?
Generally no. Brief absences, such as a weekend trip to France or Italy, don't break the count, and the 30-day work or 90-day stay thresholds can be met with continuous or interrupted presence. Any presence on a calendar day counts as a Swiss day.
Which Swiss cantons have the lowest tax rates?
Rates vary dramatically by canton. Zug and Schwyz have approximate top combined rates around 22% and Nidwalden around 24%, while Zurich is around 40%, Vaud around 41%, and Geneva around 45%. High earners often choose Zug, Schwyz, or Nidwalden for the favorable rates.
Who qualifies for Swiss lump-sum taxation (forfait fiscal)?
Generally foreign citizens who are first-time Swiss residents (or returning after a 10-year absence) and take no paid employment in Switzerland, with a minimum federal-level base of CHF 400,000 plus cantonal minimums. Tax is computed on a deemed lifestyle expense rather than actual income. Note that some cantons, including Zurich, Basel-Stadt, and Schaffhausen, have abolished cantonal lump-sum taxation.