St. Gallen taxes: rates, brackets and deductions (cross-border guide)

Context

In a nutshell

• Cantonal taxes vary between Swiss cantons for rates and brackets
• Cantonal and municipal taxes operate in the Canton of St. Gallen with their own multipliers
• Each municipality applies its own multiplier on the cantonal basis set by the canton
• The annual declaration is mandatory with deadlines established by the administration

Key facts

• What: Tax system at three levels (federal, cantonal, municipal)
• Where: Canton of St. Gallen
• How: Progressive rates on taxable income with deductions allowed by law
• Multipliers: Each municipality applies its own multiplier on cantonal tax
• Declaration: Annual obligation with deadlines of the cantonal tax administration

The Swiss tax system is divided into three distinct levels: the direct federal tax administered by the Federal Tax Administration (FTA), the cantonal tax set by the legislation of each canton, and the municipal tax calculated by applying a multiplier to the cantonal rate. In the Canton of St. Gallen, as in the other 25 Swiss cantons, this composite system allows a distribution of the tax burden among the three levels of government.

Cantonal taxes in the Canton of St. Gallen follow a progressive rate on taxable income. Individuals residing in the canton are obliged to complete an annual dichiarazione fiscale indicating income, deductible expenses and other income. The cantonal law of St. Gallen defines

Operational details

From determining taxable income to progressive rates

In the Canton of St. Gallen, taxable income is calculated starting from gross income (wages, annuities, professional income) and subtracting all deductions allowed by cantonal law. The resulting taxable income is subject to a rate that varies progressively according to the income brackets: the higher the income, the higher the rate. This progressive system ensures that the tax burden is not proportional but increases as income grows.

Deductions allowed by Swiss law include mandatory contributions (AVS, AI, IPG) and deductions on a cantonal basis such as insurance expenses (sickness, accidents, civil liability), interest on mortgage debts, voluntary contributions in the form of previdenza privata del terzo pilastro 3a up to the annual ceilings, investment losses and other items defined by the cantonal law of St. Gallen.

Impact of municipal multipliers on the overall tax burden

Once the cantonal tax administration calculates the cantonal tax on the basis of the cantonal rate and taxable income, the municipality of residence applies its own multiplier, determining the total municipal tax. Two St. Gallen citizens with the same taxable income may pay different municipal taxes if they reside in municipalities with different multipliers. This mechanism reflects the principle of Swiss fiscal federalism: autonomy

Useful planning tools

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Key points

How to File Your Tax Return in the Canton of St. Gallen

Filing a tax return in the Canton of St. Gallen can be done by following these main steps:

1. Gather income documents: salary certificates (for employees), pension certificates, professional income documents, social security certificates.

2. Complete the declaration form: use the online portal of the St. Gallen cantonal tax administration or the official paper form.

3. Indicate deductions: enter all permitted deductions (insurance premiums, pension contributions, mortgage interest) with supporting documentation.

4. Verify the calculation: check that the taxable income, the applicable tax rates, and the calculated tax are correct.

5. Submit the declaration: via the online portal (preferably) or by mail to the deadline indicated by the cantonal tax administration.

Deadlines and Filing Deadline

The tax administration of the Canton of St. Gallen announces the filing deadlines annually for the tax return. It is important to respect these deadlines to avoid administrative penalties. If taxes are owed, payment must be made according to the methods and deadlines specified by the tax administration.

Available Tools: The Tax Administration Online Portal

The tax administration of the Canton of St. Gallen provides an online portal where you can:

• Complete the declaration in digital format
• Attach documents and receipts for deductions
• Check the status of your previous declaration
• View current tax rates and brackets for the current year
• Download paper forms, if necessary

Accessing the portal typically requires secure banking access (e.g., with a digital certificate) or credentials provided directly by the tax administration.

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