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Wappen Kanton St. GallenHave your tax return for the Canton of St. Gallen completed

We know the cantonal deductions, deadlines and special features in the canton of St. Gallen and review your tax return in full – with personal support and at a fixed price from CHF 35.–.

  • Personal specialist review of your documents
  • All cantonal deductions checked
  • Deadline extension included free of charge
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steuermacher.ch is a brand of FINWIWO AG.

The short answer

In the canton of St. Gallen, the tax return for the 2025 tax year must be filed by 31 March 2026; a deadline extension can be requested online and is included free of charge with us. We prepare your tax return at a fixed price per tax year: CHF 35.– for apprentices and students, CHF 99.– for individuals, CHF 149.– for married couples and families.

Cantonal knowledge

Tax return in the canton of St. Gallen: what you should know

The cantonal tax law applies equally everywhere – but how much you ultimately pay depends heavily on your municipality and on the deductions you claim.

Updated on 31 August 2026 · Tax year 2025

Professionally reviewed by FINWIWO AG on 2 September 2026.

Specialist discussing tax documents with a client

75 municipalities, one tax law – but big differences

The canton of St. Gallen has 75 political municipalities. Each sets its own tax multiplier independently, and depending on where you live, school and church tax multipliers are added. There are therefore significant differences between the cheapest and the most expensive municipalities – for identical income.

For your tax return, this changes nothing about how the data is entered: what counts is your municipality of residence; if you move within the canton, it is generally the municipality at the end of the year. We clarify such points before we start processing.

E-Tax SG – the electronic tax return

From the 2025 tax period, the canton of St. Gallen provides a web application with E-Tax SG. A local installation is no longer required, access is via the AGOV login, and the tax return can be filed fully digitally.

E-Tax SG is an option for anyone who wishes to complete the return themselves. If you want to be sure that every item is recorded correctly and completely, we take care of it for you: we enter your details, discuss the draft with you and prepare the submission.

Typical mistakes that cost St. Gallen taxpayers money

In practice, we see the same points again and again: for commuting by private vehicle, the proof of necessity is missing, so the travel expense deduction is lost entirely. The deduction for insurance premiums is not fully used. For properties, value-adding investments are declared as maintenance – or vice versa.

Costs for third-party childcare also often remain unused because the requirements are not known. A specialist checks every item individually and points out missing receipts to you before the return is filed.

Expertise instead of chance

Tax expertise for the canton of St. Gallen

Modern office building – symbolic image
Modern office building – symbolic image

steuermacher.ch is a brand of FINWIWO AG and works for you throughout Switzerland. Your tax return is prepared by specialists who know the cantonal particularities – for the canton of St. Gallen, that means cantonal deductions, deadlines and the practice of the cantonal tax office.

Specifically, we check the St. Gallen tax multipliers of your municipality of residence, the applicable filing deadlines including deadline extension, and the entry and submission via E-Tax SG. We work with you regardless of location: digitally, by telephone or by video.

Active throughout Switzerland – for all 26 cantons.

Phone+41 71 552 30 00

Get more out of it

Tax deductions in the canton of St. Gallen: making use of every option

Anyone who knows all permissible deductions and claims them correctly noticeably reduces their tax burden. We systematically check every deduction item for your situation. The applicable maximum amounts apply per tax year; we verify them using the official guidelines for your tax period.

  1. 01

    Professional expenses & commuter deduction

    Travel expenses between home and workplace, meals away from home and other professional expenses. If a private vehicle is used, its necessity must be proven – we check whether this proof is possible in your case.

  2. 02

    Insurance premiums & medical expenses

    Premiums for health and accident insurance as well as other personal insurance within the applicable maximum amounts. Medical and dental costs borne by you are additionally deductible above the applicable threshold.

  3. 03

    Pillar 3a & pension provision

    Contributions to restricted pension provision are deductible up to CHF 7'258 (2025 tax year, employees with a pension fund); in addition, there are buy-ins into the pension fund. We assign the certificates to the correct item and check whether the permissible amount has been fully used.

  4. 04

    Child deductions & third-party childcare

    Child and education deduction as well as documented costs for third-party childcare. These are subject to certain requirements, such as both parents being in gainful employment.

  5. 05

    Continuing education costs

    Job-related education and continuing education: up to CHF 13'000 per person and year (2025 tax year, canton of SG and federal level). This includes course fees, teaching materials, examination fees and travel costs to the course location.

    Official source(opens in a new tab on sg.ch)
  6. 06

    Donations & charitable contributions

    Voluntary contributions to tax-exempt charitable institutions domiciled in Switzerland as well as contributions to political parties, each within the applicable limits.

In addition, there are further items such as debt interest, maintenance payments, property costs or asset management costs. We clarify which deductions can be substantiated in your situation before we start processing – free of charge and without obligation.

Guidelines and forms of the canton(opens in a new tab on sg.ch)

Keeping track of dates

Deadlines and filing in the canton of St. Gallen

The date on your personal tax documents is always authoritative. The following overview refers to the 2025 tax year.

Deadlines at a glance

Ordinary filing deadline
31 March 2026 for the 2025 tax year
Deadline extension
Via the QR code on the tax return or online with the cantonal tax office
Electronic tax return
E-Tax SG, from the 2025 tax period
In case of late filing
After a reminder, a disciplinary fine and a discretionary assessment are possible

Missed the deadline? No reason to panic.

Anyone who needs more time can have the deadline extended. In the canton of St. Gallen, this is straightforward via the QR code on the tax return or online with the cantonal tax office.

If the deadline has already passed, a reminder usually follows first. In this case, get in touch early – we clarify with you what is still possible and take care of the application.

The deadline extension is included free of charge in our package price.

Secure the deadlines – request now

Withholding tax

Withholding tax in the canton of St. Gallen

If your salary is taxed directly at source, an ordinary tax return is not automatically required – but in certain cases it is mandatory or possible on a voluntary basis.

01

Who is subject to withholding tax?

In principle, foreign employees without a C settlement permit who are resident or staying in the canton – for example with a B or L permit – as well as cross-border commuters. The tax is deducted directly from the salary.

02

NOV – subsequent ordinary assessment

From a gross annual income of CHF 120'000, the subsequent ordinary assessment is carried out ex officio (mandatory); below that, it can be requested voluntarily. The application must generally be submitted by 31 March of the following year. This allows deductions to be claimed that are not included in the withholding tax rate.

03

How we support you

We check the tariff code, marital status, other income and possible deductions and assess whether a subsequent ordinary assessment is worthwhile in your case. We then submit the application on time and prepare the complete tax return.

This information is for guidance only and does not replace an individual assessment. We review your specific situation before we start processing.

Have your withholding tax checked

From the region

Typical situations in the canton of St. Gallen

Cross-border commuters: living in St. Gallen, working in Liechtenstein

If you return to your place of residence daily, your salary is generally taxed in Switzerland and belongs in full in your St. Gallen tax return. Special cases such as no daily return or employment in the public sector are clarified by us on a case-by-case basis.

Cross-border commuters: living in Liechtenstein, working in the canton of St. Gallen

Here the rules of the double taxation agreement apply and, depending on the situation, withholding tax. We check which variant applies to you and whether a subsequent ordinary assessment makes sense before we start processing.

Commuters

Many residents of St. Gallen commute – to the Rhine Valley, to Winterthur or Zurich. Travel expenses, meals away from home and other professional expenses belong in the tax return, properly documented. Anyone wishing to deduct the use of a private vehicle needs proof that public transport is not reasonable – we check this in advance.

Students at the HSG and OST

St. Gallen is a university city: the University of St.Gallen (HSG) and OST – Eastern Switzerland University of Applied Sciences. Even with a part-time job, an internship or a scholarship, a properly prepared tax return is worthwhile. For apprentices and students, our fixed price of CHF 35.– per tax year applies, including a check of the deductions for education costs and travel expenses.

Property and imputed rental value in the canton of St. Gallen

Anyone who owns residential property in the canton of St. Gallen is taxed on the imputed rental value as income and can in return deduct mortgage interest, maintenance and administration costs. The key is a clean separation: repairs and replacements preserve the value and are deductible; an extension increases it and is not.

If the property is not fully occupied by the owner, an under-occupancy deduction may be considered under certain conditions. For pensioners, there is also a hardship provision if the imputed rental value represents a disproportionate burden. We check on a case-by-case basis whether the requirements are met – there is no blanket entitlement.

If your property is located in another canton or you own several properties, a tax allocation is made between the public authorities involved. We record all properties in full so that the allocation remains transparent.

  • Imputed rental value and property details recorded correctly
  • Mortgage interest and list of debts checked
  • Maintenance: value-preserving separated from value-adding
  • Under-occupancy deduction and hardship provision checked
  • Properties outside the canton taken into account

Additional service: CHF 65.– per property.

Communal comparison

Tax multipliers of the municipalities in the canton of St. Gallen

The tax multiplier varies considerably from municipality to municipality in the canton of St. Gallen. The following selection shows some of the larger and some particularly low-tax municipalities. The total tax multiplier is made up of the cantonal, communal and church tax multipliers.

Depending on where you live, your tax burden can differ significantly. This makes a tax return that makes full use of all permissible deductions all the more important.

Tax multiplier overview of all St. Gallen municipalities(opens in a new tab on sg.ch)

Your preparation

Documents you should have ready

Depending on your situation, further documents may be needed. After your request we tell you exactly what is still missing.

Simple process

Your finished tax return in 4 clear steps

Request, discuss, approve – we take care of the rest for you.

  1. 01

    approx. 60 seconds

    Submit a request

    Fill in a short form with your contact details and canton of residence – free of charge and without obligation.

  2. 02

    within 24 hours

    Meet your advisor

    Your personal tax specialist gets in touch – at your home, in the office or by video call.

  3. 03

    upload or post

    Go through your documents

    Together you go through the checklist; anything missing can easily be sent later.

  4. 04

    after your approval

    Finished tax return

    We prepare the tax return, you approve it – then we file it for you.

Request now, free of charge

Transparent prices

Fair fixed prices – also in the Canton of St. Gallen

Fixed price per tax year. Payment is made after completion, within 14 days.*

  • Apprentices & students

    CHF 35.–

    Up to CHF 30'000 gross salary

    Per tax return

    • Tax return included
    • Securities included
    • Deadline extension included
    • Advice and processing
    • Filing with the tax office
    • Available in all cantons
    Request now
  • Most popular

    Individuals

    CHF 99.–

    For employees & self-employed

    Per tax return

    • Tax return included
    • Securities included
    • Deadline extension included
    • Additional income included
    • Further education costs included
    • Filing with the tax office
    • Personal tax specialist
    • Advice by phone
    Request now

  • Married couples

    CHF 149.–

    Joint assessment

    Per tax return

    • Tax return included
    • Securities included
    • Deadline extension included
    • Joint assessment
    • Child deductions optimised
    • Third-party childcare costs
    • Filing with the tax office
    • Personal tax specialist
    Request now
  • Real estateCHF 65.– per property
  • InheritanceCHF 65.–
  • Express 72hCHF 100.–

See all prices and additional services

* Regular clients can pay online in advance.

Further reading

Related guide articles

In-depth articles on the topics addressed on this page.

Filing deadlines of all cantonsWhen each tax return is due – an overview of all cantons.Professional expenses and commuter deductionClaiming travel expenses, meals and other professional expenses correctly.Imputed rental value and maintenanceTaxing home ownership and clearly separating maintenance costs.Withholding tax and expatsWhen a subsequent ordinary assessment is worthwhile.

Frequently asked questions

Frequently asked questions – Canton of St. Gallen

The key answers about your tax return in this canton.

Transparency

Official information

The information provided by the Canton of St. Gallen is always authoritative. Reviewed/updated: August 2026.

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Other cantons

We work in all 26 cantons – choose your canton for the relevant information.