Swiss Tax Calendar

Canton filing deadlines and extension windows (2026)

Overview of standard declaration deadlines, common extension limits, and key notes by canton. Always confirm local updates with the tax authority of your municipality.

Canton Regular filing deadline (2026) Latest standard extension (2026) Notes / fees
Aargau31.03.2026varies by municipalityExtension deadlines vary by municipality
Appenzell Ausserrhoden31.03.202631.10.2026Free
Appenzell Innerrhoden30.04.202630.11.2026Free
Basel-Landschaft31.03.202630.11.2026Fee applies for second extension
Basel-Stadt31.03.202631.12.2026Free
Bern15.03.202615.11.2026Online extension requests
Fribourg31.03.202615.12.2026Fee may apply for extension
Geneva31.03.202631.12.2026Extension fee: CHF 20-60
Glarus31.03.202631.12.2026Free
Graubunden31.03.202630.09.2026Free
Jura15.07.202631.10.2026Free
Lucerne31.08.202631.12.2026Free extension request available
Neuchatel21.02.202631.10.2026Fee may apply for second extension
Nidwalden31.03.202631.12.2026Free
Obwalden31.03.202631.12.2026Free
Schaffhausen31.03.202630.11.2026Free
Schwyz31.03.202631.12.2026Fee for second extension
Solothurn31.03.202631.07.2026 or 30.11.2026Fee for second extension
St. Gallen31.03.202631.12.2026Free
Thurgau30.04.202630.11.2026Free
Ticino30.04.202631.12.2026Free
Uri31.03.202630.09.2026Free
Valais31.03.202631.12.2026Free
Vaud15.03.202630.09.2026Free
Zug30.04.202631.12.2026Free
Zurich31.03.202630.11.2026Free

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