Learn › Tax Returns (Switzerland)

In short: In Switzerland most individuals file their tax return each year with their canton of residence. Depending on the canton, the ordinary deadline falls between late February and late April 2026 (often 31 March), and in almost all cantons an extension is free and available online.

Filing Your Tax Return in Switzerland

Kontoo editorial team · Updated 06/24/2026

In Switzerland the tax return is strongly cantonal: the federal government, the canton and the municipality all tax the same income, but each of the 26 cantons has its own deadlines, its own software and partly its own rules. This chapter explains the process for individuals in a neutral way – not tax advice. As of 2026; when in doubt, check your canton’s official source.

Gather your documents: salary certificate, bank statements, securities list, proof of deductions (pillar 3a, work expenses, health insurance, donations).
Choose access to your cantonal portal or the eTax software – usually online in the browser and free.
Enter your data, claim deductions and review the provisional tax calculation.
Submit before your canton’s deadline – or request an extension in good time.

What matters

Switzerland taxes income and wealth at three levels – the federal government (direct federal tax), the canton and the municipality – but you only fill in one tax return, with your canton of residence. Because the cantons are largely autonomous, deadlines, software and deductions can differ markedly; often only ranges can be given. The ordinary filing deadline for the 2025 return falls in 2026 between roughly late February and late April, most often 31 March. In almost all cantons you can extend online, free of charge and without giving a reason – often until September, October or November. Geneva is the well-known exception, with a tiered fee. Important: the extension request must arrive before the ordinary deadline expires. Filing today is mostly electronic. Around 13 cantons use the online eTax solution or their own cantonal portal (for example ZHprivateTax in Zurich or eTAX AARGAU in Aargau); individual cantons such as Fribourg and Neuchâtel rely on download software. The applications are free, run in the browser and often carry your master data over to the new year automatically. With deductions, care pays off. Pillar 3a is regarded as the largest legal deduction: in 2026 employed people with a pension fund can deduct up to CHF 7,258, and those without a pension fund up to 20 % of their earned income, capped at CHF 36,288. New from 2026: under certain conditions, retroactive top-ups into pillar 3a are possible. There are also flat rates for work expenses (often around 3 % of net salary), deductions for further education (up to roughly CHF 13,000) and for travel costs – from tax year 2026 often CHF 0.75 per kilometre. As of 2026; when in doubt, check your canton’s official source.

ExamplePillar 3a example: if in 2026 you pay in the maximum amount of CHF 7,258 as an employee with a pension fund, your taxable income falls by that amount. Depending on where you live and your income, this saves roughly CHF 200 to 400 per CHF 1,000 paid in – so for CHF 7,258, about CHF 1,450 to 2,900. The exact saving depends on the cantonal and municipal tax rate; use your canton’s official tax calculator.

Keep proof of deductible items (pillar 3a, work expenses, further education) in Kontoo throughout the year so everything is ready when you file. The official submission happens through your canton’s eTax portal.

In depth

Federalism: three levels, one return

The federal government, the canton and the municipality all tax the same income, but you only file one return, with your canton of residence. Cantonal autonomy is why deadlines, rates and deductions vary – figures can often only be given as ranges.

Withholding tax and subsequent assessment

Foreign employees without a C permit are generally taxed at source. Above around CHF 120,000 gross salary a subsequent ordinary assessment becomes mandatory; below that it is possible on request (often by 31 March) in order to claim deductions.

Electronic rather than paper

Most cantons rely on browser-based portals such as eTax, ZHprivateTax or eTAX AARGAU. Data is encrypted and hosted in Switzerland, and often carried over automatically to the following year – this saves re-typing but does not replace your own review.

Checklist

I know my canton’s ordinary tax deadline for 2026.
I have checked whether I need an extension and requested it in time.
I know which eTax portal my canton uses to receive the return.
I have gathered proof of my deductions (pillar 3a, work expenses, further education).

Common myths

Myth: The same tax deadline applies across all of Switzerland.

Reality: No. Each of the 26 cantons sets its own deadline; in 2026 the range runs from roughly late February to late April.

Myth: An extension always costs something and needs a justification.

Reality: In almost all cantons it is free, online and without a reason. Geneva is the well-known exception, with a tiered fee.

Frequently asked questions

By when must I file the 2025 tax return?

The ordinary deadline depends on the canton and in 2026 falls roughly between 28 February and 30 April – most often 31 March. Jura is early, while Zug, Ticino, Appenzell Innerrhoden and Obwalden are late. Your canton’s notice is always the authoritative source.

Can I extend the deadline?

Yes. In almost all cantons the extension is available online, free of charge and without giving a reason, often into the autumn (e.g. September to November). Geneva is the exception and charges a fee (tiered, roughly CHF 20–60). The request must be made before the ordinary deadline expires; retroactive extensions are not granted.

Do I need to file if I am taxed at source?

People subject to withholding tax who earn more than around CHF 120,000 gross per year are subject to a subsequent ordinary assessment and must file a return. Those earning less can voluntarily request a subsequent ordinary assessment (usually by 31 March) in order to claim deductions.

All lessons · Glossary · Editorial · Kontoo does the math and explains – this is general education, not tax, legal or financial advice.

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