swiss tax declaration
Everyday Money

How to Fill Out A Swiss Tax Declaration

February 20, 2025 - Ralf Beyeler

For many people, filling out Swiss tax declarations is complicated and confusing. This moneyland.ch guide helps you find your way around your Swiss tax declaration forms.

While there are differences between cantons, in all cantons you get just one tax declaration form for federal, cantonal, and municipal taxes. Typically, the section for tax deductions has two columns – one for cantonal and municipal tax deductions, and the other for federal tax deductions.

Many cantons give their residents the option of filling out tax declarations online. Your signature is no longer required for online tax declarations. One advantage of filling out your tax declarations online is that a lot of information is saved and filled in automatically in subsequent tax declarations. Another advantage is that many calculations are automated. 

Although online tax declarations often come with a simplified, assisted process, it is still helpful to understand the different parts of a tax declaration form. You generally also have the option of filling out online tax declarations using a complete, unassisted mode.

 

The main tax declaration form

Your Swiss tax declaration is made up of a primary tax declaration form, plus a number of complementary forms. You must first fill out detailed information on the complementary forms. After that, you must copy certain key figures into your main tax declaration form.  

Although there are small differences between the tax declaration forms from different cantons, the general layout is always similar. Typically, the main tax declaration form is made up of these components:

  • Page 1: General information

Typically, the first page of the form is reserved for general personal information like your name, address, children, and employer, and whether or not you contribute to an occupational pension fund.

  • Page 2: Income

The second page of the main form is where you declare your income. In addition to salaries, income also includes pensions, interest and dividends earned from bank accounts and investments (but not capital gains and tax-free distributions), rent earned from renting out property, alimony, child support, profits, and monetary compensation. 

  • Page 3: Income tax deductions

The third page is where you list all of the income tax deductions that you are eligible for. There are normally two different columns for tax deductions – one for cantonal and municipal income taxes, and the other for federal income tax.

  • Page 4: Assets and debts

The fourth page of the main form is where you declare your assets, such as bank account balances, and the value of your investments, cars, and properties. You can also claim wealth tax deductions for debt. In cantons that have flat wealth tax deductions and wealth tax exemptions, these are also dealt with on page four. 

Complementary forms

There are numerous complementary forms. Some forms, like the one for insurance premiums and interest earned on savings, must always be filled out and submitted along with the main form. Other complementary forms only apply in certain situations. Examples include forms for employees, self-employed people, or farmers. As a general rule, you only have to fill out complementary tax forms if the information included on it would affect the information required on the main tax form. The complementary forms have different titles in different cantons. Certain complementary forms may exist in some cantons, but not in others.

Here is a list of important complementary tax declaration forms:

  • Insurance premiums and interest earned on savings: This complementary form affects all taxpayers. On this form, you can list premiums paid for health insurance, life insurance, and voluntary accident insurance, as well as interest earned on savings in order to determine your tax deduction. This tax deduction is capped at a certain limit (see Table 1 in the guide to Swiss tax deductions). The tax deductions for insurance premiums and for interest earned on savings are combined both for federal income tax, and for the income taxes of 24 out of 26 cantons. In practice, the premiums paid for mandatory health insurance often use up most or all of this tax deduction, leaving little or no room to deduct other insurance premiums and interest earned on savings.
  • Declaration of wealth: On this form, you declare assets held as cash, bank account balances, tangible assets, and securities like mutual funds, ETFs, stocks, and bonds. Yields such as interest and dividends also have to be declared on this form. You must declare the amount that each asset was worth in Swiss francs at the end of the corresponding tax year. If you have a stock brokerage account, getting an electronic tax statement from your bank can greatly simplify the process of filling out this form. Private investors generally do not have to declare or pay tax on capital gains. 
  • Occupational expenses: Employees can use this form to claim tax deductions for commuting and dining out, plus a flat tax deduction. This form may also be referred to as professional expenses or expenses related to earning an income.
    Declaration of real estate: Property owners must declare their property and provide information about their real estate on this complementary form. Required information includes the property's market value, rents received from renting out the property, and expenses related to the property’s maintenance and management. If you own the home you live in, you have to state your home’s imputed rental value on this form.
  • Declaration of self-employment: If you are self-employed, you must use this form to provide information related to your sole proprietorship or other form of non-incorporated company. This form is not required if your company is a corporation or a limited liability company (a Swiss AG/SA or GmbH/Sàrl). Those types of companies must submit a separate tax declaration as a company.

There are many other complementary tax forms in addition to those listed above. Examples include complementary forms for the costs of continuing education, healthcare expenses, and agriculture.

 

More on this topic:
Important Swiss tax deductions explained
Tax deductions for bank accounts explained
Tax deductions for investors explained

Expert Ralf Beyeler
Ralf Beyeler is the telecom expert at moneyland.ch and also covers other areas of personal finance.
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