International income – report it clearly and in full
Many expats earn income in Switzerland and abroad, for example from rental properties, self-employment, investments, or pensions. The Swiss tax authorities require this income to be declared, even if it has already been taxed abroad.
What needs to be declared?
In the Swiss tax return, you must declare all worldwide income, including:
- Salaries from foreign employment
- Pensions or social benefits from your home country
- Income from rentals, capital gains, or investments
- Self-employment abroad
Why is this relevant?
Switzerland applies the so-called worldwide income principle. Even if part of your income is not directly taxed in Switzerland, it affects the rate applied to your other income. This is called the “progression proviso”: your tax rate is determined based on total income.
No need to fear double taxation
Thanks to international treaties, your income will not be taxed twice. However, you must correctly report your income so that Switzerland can apply the appropriate deductions or credits.
More key information for expats
Residence & tax liability
The type of residence permit you hold in Switzerland decides your tax liability – this includes individuals staying only for a limited or temporary period.
Withholding tax
Withholding tax means automatic deductions from your salary – we show you whether part of it can be reclaimed.
Ordinary assessment
For certain deductions, a voluntary assessment is worthwhile – even if tax has already been deducted directly from your salary.
Double taxation
If you earn income in multiple countries, tax treaties help avoid double taxation – we explain which income is taxed in which country.
Tax deductions
Even smaller deductions like commuting costs or work materials add up – especially for expats, correct reporting is worthwhile.
Assets & foreign accounts
Balances on foreign bank accounts must also be declared – with correct reporting, there is no risk of penalties.
Spouse living abroad
If you don’t live in the same country as your spouse, special tax rules apply – we support you in understanding them.

Do you have any questions?
If you work abroad or earn income from other countries, you may have questions about proper declaration. Our specialists are happy to take the time to address your concerns.