Tax return & deductions
Deadlines, common deductions and e-filing for your Swiss tax return.
Deadlines
- Most cantons: 31 March of the following year; some differ.
- Extensions are usually free or cheap if requested online before the deadline.
- Withholding-tax payers earning over CHF 120,000 must file an ordinary return.
Common deductions
- Pillar 3a contributions and Pillar 2 buy-ins.
- Commuting costs (federal cap applies) and meals away from home.
- Professional training, childcare costs and insurance premiums (capped).
- Medical costs above the cantonal threshold and charitable donations.
- Property maintenance costs for homeowners.
Prepare
- Salary certificate (Lohnausweis), bank statements at 31 Dec, 3a certificates.
- Health insurance premium statement and receipts for deductions.
General information only, not legal or financial advice. Rules can differ by canton — always check the official source.