How is the source tax collected for holders of Permit B?

Tax at source is withheld directly by the employer on the employee's monthly paycheck. Rates are established based on tables approved by federal and cantonal laws and administered at the federal level by the Federal Administration of AFC/ESTV Contributions.

How does the Double Taxation Convention regulate income?

The Convention against Double Taxation between Italy and Switzerland, signed in December 1976, defines the criteria to prevent labour income from being taxed in a duplicative and disproportionate manner, providing for mechanisms such as the tax credit in the EC framework of the Italian tax return.

What social security contributions are withheld from the salary in Switzerland?

Compulsory contributions such as the employee's AVS/AI/IPG at 5.3%, AD/AC unemployment insurance at 1.1% up to the established ceiling, LAINF accident contributions and LPP occupational pension contributions from 25 years of age are retained on the Swiss salary.

Permit B and Quellensteuer: Rates and Tax Rules (cross-border guide)

Di Marco Ferrari · Published on 7 September 2026

Panoramic view of Lugano and Lake Ceresio

Complete Guide to Permit B and Source Tax in Switzerland: Fees, Pillar 3a Deductions and Comparison with Border Regimes.

Context

In brief

Withholding tax deducted directly in Switzerland
Italy avoids double taxation through the tax credit
Application of rates established by federal and cantonal laws
Centralized management through the Federal Tax Administration

Key facts

What: Withholding tax on employment income
When: Current tax period according to applicable provisions
Where: Canton of Ticino and the Swiss Confederation
Who: Federal Tax Administration FTA/ESTV
Amount: Variable rates based on cantonal and federal tables

Withholding tax on employment income represents the main taxation method for certain categories of workers in Switzerland, including those holding a residence permit such as Permit B. Unlike workers residing abroad, Permit B holders reside permanently in Swiss territory and are subject to withholding tax directly by the employer at the source.

The Swiss regulatory framework

The rates and contributions applied to Swiss salaries include various mandatory social security and insurance items established by the competent authorities. These contributions include OASI/IV/EO with an employee-paid percentage of 5.3%, ALV unemployment insurance at 1.1% up to a set maximum income ceiling, accident insurance UVG, and BVG pension contributions for mandatory occupational pension plans depending on the age bracket starting from age 25. The federal and cantonal authorities define these parameters through their administrative bodies, including the Federal Tax Administration FTA/ESTV.

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Operational details

The analysis of the tax implications for holders of a B Permit requires careful consideration of the relationship between the Swiss and Italian tax systems, especially in the presence of cross-border income or family ties. The Double Taxation Convention concluded between Italy and Switzerland, originally signed in December 1976, regulates the general principles to prevent the same income from being fully taxed in both States.

Deductions and supplementary pension

An important aspect for those subject to withholding tax concerns the possibility of requesting specific tax deductions, similarly to what is provided for taxpayers taxed under the ordinary procedure following specific income adjustments or requests for reconsideration. Financial and tax planning tools include contributions to the supplementary pension pillar known as Pillar 3a, which allow for a reduction of the overall taxable income within the limits established annually by current federal legislation. To accurately calculate the impact of these deductions on the monthly payslip and verify the withholding projection, it is particularly useful to rely on an updated tax calculator.

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Key points

The administrative management of one's tax and social security position requires compliance with precise deadlines and in-depth knowledge of the procedures to be followed in Swiss territory. Before undertaking a change of residence or applying for the issuance of a B Permit, it is essential to examine the documentation required by the competent authorities, such as the State Secretariat for Migration SEM or the designated Ticino cantonal services.

Operational procedure for the taxpayer

The worker must verify that their employer correctly applies the source tax rate corresponding to their family and social situation, as any changes in marital status or the presence of dependent children must be communicated promptly to avoid unfavorable tax adjustments. In case of doubts regarding the composition of the net salary, it is possible to simulate the individual social security and tax items using the online salary analysis tools.

Support and planning tools

To further evaluate the sustainability of the relocation and the balance between the cost of living in Ticino and employment income, it is advisable to consult regularly the dedicated guides and official economic indicators published by the Federal Statistical Office BFS/STAT. For a precise evaluation of your net salary including all tax and social security deductions required by current regulations, we recommend using our official calculator.

Frequently Asked Questions

How is the source tax collected for holders of Permit B?: Tax at source is withheld directly by the employer on the employee's monthly paycheck. Rates are established based on tables approved by federal and cantonal laws and administered at the federal level by the Federal Administration of AFC/ESTV Contributions.
How does the Double Taxation Convention regulate income?: The Convention against Double Taxation between Italy and Switzerland, signed in December 1976, defines the criteria to prevent labour income from being taxed in a duplicative and disproportionate manner, providing for mechanisms such as the tax credit in the EC framework of the Italian tax return.
What social security contributions are withheld from the salary in Switzerland?: Compulsory contributions such as the employee's AVS/AI/IPG at 5.3%, AD/AC unemployment insurance at 1.1% up to the established ceiling, LAINF accident contributions and LPP occupational pension contributions from 25 years of age are retained on the Swiss salary.