Tax return 2026: All 26 cantons fully digital for the first time

What ‘fully digital’ means today

Until now, several cantons allowed online data entry but still required certain supporting documents to be printed and mailed separately. That requirement has now been eliminated entirely: documents such as salary certificates, insurance confirmation letters, and pillar 3a account statements are uploaded directly — or, where institutions report electronically, fed automatically into the tax portal. In addition, the mileage deduction for professional travel increases from CHF 0.70 to CHF 0.75 per kilometre as of tax year 2026, a change already incorporated into all cantonal portals.

Practical tips for smooth digital filing

Set up access to your canton’s tax portal in good time (e.g. GeTax or ZugLogin in the canton of Zug). Gather all supporting documents in digital form: salary certificate, health insurance premium confirmation, pillar 3a account statement, and commuting expense records. Note the cantonal deadlines — these fall between 31 March and 30 April depending on the canton, and extensions can usually be requested online. As a self-employed person or SME owner, you can increasingly export accounting data directly from your bookkeeping software into the cantonal portal, reducing manual entries and the risk of errors.