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Privacy policy

Last updated: November 2026. This policy follows the Swiss Federal Act on Data Protection (FADP). This is a translation; the German version prevails.

1. Controller

dador.ch GmbH (brand steuern2do.ch), Beckenriederstrasse 42, 6374 Buochs, Switzerland · info@steuern2do.ch · +41 41 545 05 16

2. Data we process

  • Request: name, email, optional phone, canton, chosen package and details of your situation.
  • Tax documents: e.g. salary certificate, bank and securities statements, pension, insurance and property documents, family details.
  • Communication and billing: emails, call notes, invoices and payments.
  • Technical data: IP address, time, page and browser type in server log files.

3. Sensitive personal data

Tax documents may contain sensitive data – in particular health data (e.g. medical and dental receipts) and religion (denomination for church tax). We process such data only as far as needed for your tax return and protect it with particular care. By sending us such documents, you consent to this processing.

4. Purpose

To answer your request, prepare and file your tax return, check the assessment, communicate with you and invoice our services. We never sell data or use it for advertising.

5. Recipients and processors

  • cyon GmbH, Basel – website hosting, request and upload server, email.
  • Infomaniak Network SA, Geneva (kDrive) – storage of uploaded documents.
  • Tax authorities of your canton – filing your return on your behalf.
  • PostFinance / banks – processing your payment.

Our providers process data only on our behalf and instructions. All data is stored in Switzerland; it is not transferred abroad.

6. Document upload (steuern2do.ch/en/upload)

Uploaded files are transferred encrypted (HTTPS) via our server at cyon to our storage at Infomaniak kDrive, in a folder named after your upload number. The number is random and contains no personal data; it allows dropping off files but not viewing or downloading them. If you send us a request with your upload number, we also label your folder in our kDrive with your name so we can match your documents to your order; your name does not appear on your device or in the upload app. We receive an email notification per upload with the number and file count.

7. Data on your device

This website sets no cookies and uses no tracking or advertising services. Your browser storage (localStorage) only holds your upload number, a list of your uploads (date and file count) and – in the request form – the upload number for matching. If you install the upload app, your browser caches the app page so it starts faster. You can delete this data any time in your browser settings.

8. Retention and deletion

  • Uploads without an order: deleted after 90 days.
  • Your receipts and documents: until the end of the year in which the final assessment becomes legally binding; then they are deleted.
  • Tax return, correspondence and invoices: 10 years (statutory retention and limitation period).
  • Requests without an order: deleted after 12 months.
  • Server logs: deleted automatically by the host after a short time.

9. Security

Encrypted transfer, storage in Switzerland, access limited to the people working on your order, protected access keys and regular deletion of data no longer needed.

10. Your rights

You may request access to your data, correction, deletion or a copy in a common format, and withdraw consent at any time. Write to info@steuern2do.ch. You may also lodge a complaint with the Federal Data Protection and Information Commissioner (FDPIC).

11. Changes

We may update this policy. The version published on this page applies.