Tax Deadline Extension
Asking for more time to file taxes.
With this template you request a deadline extension for your tax return and send the request straight by post – no account, from CHF 2.49. The request must reach the competent tax office before the ordinary deadline expires; the details are governed at cantonal level.
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Tax return deadline extension {{tax_year}}
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Dear Sir or Madam, I request an extension of the deadline for submitting my tax return {{tax_year}} until {{requested_date}}. Taxpayer ID: {{tax_id}} Thank you. Yours sincerely,...
Tax-return deadline extension: how it works
Last updated: July 2026If you cannot file the tax return on time, an extension can be requested in most cantons. The request must usually be made before the ordinary filing deadline expires. Many cantons offer the extension online, by phone or in writing; the maximum duration and any fees vary by canton.
In the request, state your tax or register number, name, address, the tax year and the desired new filing date. A reason is often not mandatory but may be required. Submit the request in good time, as a late request is usually no longer considered.
Recommended shipping method
Because the request must arrive on time, we recommend fast sending by A-Post or – for proof – by registered mail (from CHF 8.99). Check whether your canton also offers the extension online, which is often faster. This is a recommendation.
This information is provided as drafting help only and does not constitute legal advice. Deadlines and formal requirements can vary by contract, policy or canton – if in doubt, check with the relevant body.
Deadlines & facts extension
Overview (varies by canton – without warranty):
- Submit the request
- before the ordinary deadline expires
- Recipient
- the competent cantonal/municipal tax office
- Details
- tax number, tax year, new date
- Reason
- often not mandatory, may be required
- Duration / fee
- varies by canton
How it works
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Common questions
By when must I request the extension?
Usually before the ordinary filing deadline expires. A late request is mostly no longer considered; so act in good time.
Who do I address the request to?
To the cantonal or municipal tax office competent for you. The competence is shown on your tax documents.
Do I have to give a reason?
Often no reason is mandatory, but some cantons require a short justification. Check your canton's requirements.
How long is the deadline extended?
The maximum duration and any fees vary by canton. State a concrete desired filing date in the request.
How should I send the request?
Fast sending by A-Post often suffices; for proof, registered mail (from CHF 8.99) is suitable. Simple sending is possible from CHF 2.49.