Tax Return Switzerland 2026

Tax Return 2025: Submission Deadlines 2026

In 2026, you submit the tax return for tax year 2025. The deadlines vary significantly by canton.

Deadlines by Canton (Alphabetical)

Note: Deadlines may change. The information from your cantonal tax office is authoritative.

Applying for an Extension

How It Works in Most Cantons

Important Notes

• Apply before deadline: The extension must be requested BEFORE the regular deadline
• No justification needed: In most cantons, a simple click is sufficient
• Free: Almost everywhere (exception: Geneva CHF 20)
• Multiple extensions: In some cantons, up to 3 extensions possible

Consequences of Missing the Deadline

Reminders and Fees

Discretionary Assessment

If you don't submit a tax return, the tax office estimates your income – usually to your disadvantage:

• No entitlement to deductions (Pillar 3a, commuting costs, etc.)
• Often higher estimated income
• Appeal only possible within 30 days

Save Taxes Before the Deadline

Don't Forget Important Deductions

Pillar 3a: Still Pay in for 2025

Contributions for tax year 2025 are still possible until 31 December 2025. After that, the contribution counts toward tax year 2026.

Checklist: Tax Return 2026

FAQ

Can I extend the deadline indefinitely?

No, each canton has a maximum extension deadline (usually until September/October). After that, you risk discretionary assessment.

What does an extension cost?

It's free in almost all cantons. Exception: Geneva (CHF 20).

Can I submit the tax return online?

Yes, all cantons offer electronic submission. In some cantons, it's even mandatory (e.g., Zurich for certain groups).

What happens with a discretionary assessment?

The tax office estimates your income and assets. You can file an objection within 30 days and submit the correct tax return.

When must I submit federal taxes?

Federal tax is submitted together with the cantonal tax return. The same deadline applies.

Conclusion

The tax return 2025 must be submitted between February and April 2026 depending on the canton. Use the free extension in time and don't forget important deductions.

Tip: Start collecting all documents early – this avoids stress just before the deadline.