Tax at source in Switzerland, explained

Last updated: 9 May 2026

Sources used: ch.ch and Comparis. Links are listed at the end of this guide.

The simple version

Tax at source means your tax is taken directly from your salary, pension or certain benefits before you receive the money.

In Switzerland, this system mainly concerns foreign residents who do not hold a C permit. It can also apply to people living abroad who receive income from work carried out in Switzerland, such as cross-border commuters.

Your employer, insurance provider or pension fund deducts the tax and sends it to the cantonal tax authority.

Who usually pays tax at source?

Tax at source usually applies to foreign workers living in Switzerland who do not have a settlement permit, known as a C permit.

It can also apply to people who live abroad but receive income from an activity carried out in Switzerland. This includes some cross-border commuters, weekly residents, lecturers, artists, professional sportspeople and similar cases.

Who is usually taxed under the ordinary system?

Swiss citizens are normally taxed under the ordinary tax return system.

Foreign residents with a C permit are also generally taxed under the ordinary system, like Swiss citizens.

According to ch.ch, foreign workers are generally not taxed at source if they have a Swiss spouse or a spouse who holds a C permit.

What does tax at source cover?

According to ch.ch, the tax deducted at source covers federal, cantonal and communal income taxes.

That is why many people taxed at source do not need to fill out a standard Swiss tax return.

However, this does not mean every situation is finished automatically. Some expats may still need to take action depending on income, assets, additional income, deductions or canton-specific rules.

How is the rate calculated?

The tax-at-source rate varies by canton. It can also vary from person to person.

Comparis explains that the calculation usually depends on factors such as:

• Your gross income
• Your canton of residence
• Your marital status
• Your religious denomination
• Whether you have children
• Whether you have one job or more than one job
• Whether both spouses or partners work

The percentage and amount should usually appear on your monthly payslip and on your annual salary statement.

Where do you see it?

You usually see tax at source on your payslip as a salary deduction.

At the end of the year, your employer provides a Swiss salary certificate. This certificate itemises your salary, benefits, deductions and other relevant amounts. It is one of the most important documents if you later need to file or correct a tax return.

Does tax at source mean you never file a tax return?

Not always.

For many foreign employees taxed at source, the monthly deduction is the main tax process. But in some cases, a subsequent ordinary assessment may apply. This means you continue to pay tax at source monthly, but you also file a tax return later. The tax already paid at source is credited against the final calculation.

When a subsequent ordinary assessment may matter

Comparis lists examples where a subsequent ordinary assessment may apply, including:

• Gross annual income above CHF 120,000
• Taxable assets of at least CHF 80,000 at the end of the tax year or tax period
• Additional income of at least CHF 3,000 that is not subject to withholding tax, such as income from self-employment, securities or alimony

The exact rules can depend on your canton and personal situation, so check your cantonal tax authority if any of these points apply to you.

Can you claim deductions if you are taxed at source?

This is one of the most common questions for expats.

People taxed under the ordinary system can declare income, assets and deductions in a tax return. ch.ch lists examples of possible deductions in ordinary tax returns, including work-related expenses, insurance and medical costs, 3rd pillar contributions, donations, continuing education and childcare costs.

If you are taxed at source, whether and how you can claim deductions depends on your situation and canton. In some cases, you may need to request a correction or file through a subsequent ordinary assessment.

Because the process and deadlines can vary, check your cantonal tax authority early rather than waiting until the last minute.

Common expat mistakes

1. Thinking tax at source is always final

For many people it may be enough. But not for everyone. Higher income, additional income, assets, family changes or canton-specific rules can create extra steps.

2. Not checking the canton

Swiss taxes vary by canton and commune. Tax-at-source rates also vary by canton, so advice from a friend in another canton may not apply to you.

3. Ignoring the payslip

Your monthly payslip should show the tax deducted. If your marital status, children, religion or work situation is wrong, the deduction may also be wrong.

4. Forgetting additional income

Income from securities, self-employment, alimony or other sources may create an additional tax obligation.

5. Missing deadlines

If you need to request a correction or submit documents, deadlines matter. These are usually handled by the canton.

What should you check?

If you are taxed at source, keep a simple tax folder for each year.

• Your monthly payslips
• Your annual salary certificate
• Information about your permit status
• Your canton and commune of residence
• Any additional income
• Bank and investment statements if relevant
• 3rd pillar contributions if relevant
• Childcare, education or other deduction documents if relevant
• Any letters from your cantonal tax authority

When should you ask for help?

You may want to speak to your cantonal tax authority or a qualified tax advisor if:

• You earn more than CHF 120,000 gross per year
• You have assets, investments or property
• You have additional income outside your main salary
• You moved canton during the year
• You changed marital status or had a child
• You are unsure whether your payslip uses the right tax code
• You want to understand whether deductions can be claimed
• You are a cross-border commuter

Quick summary

• Tax at source is deducted directly from salary or certain benefits.
• It mainly affects foreign workers in Switzerland without a C permit.
• The employer usually sends the tax to the cantonal tax authority.
• The deduction covers federal, cantonal and communal income taxes.
• The rate depends on factors such as income, canton, marital status, religion and children.
• Some people still need a subsequent ordinary assessment or correction.
• Check your canton if you have high income, assets, additional income or unusual circumstances.

Useful official and practical sources

This guide is based on the following sources:

• ch.ch: Tax at source
• ch.ch: Tax return
• ch.ch: Paying taxes in Switzerland
• ch.ch: Swiss salary certificate
• Comparis: Calculate withholding tax in Switzerland