What investment income is taxed?

If you earn a profit as an investor, questions arise regarding the correct taxation. Not all profits from investments are taxed equally. If foreign withholding tax or Swiss withholding tax are due in Switzerland, you may in some cases be able to reclaim all or some of these taxes.

With regard to the taxation of natural persons, a distinction is generally made between income and capital gains.

Investment income

Dividends from stocks or interest on bonds as well as other securities are considered as earnings on securities. These earnings must be taxed as income. Additionally, a withholding tax (currently 35 percent as of 2025) is levied on securities issued by Swiss debtors. Individuals who are subject to tax in Switzerland can reclaim all of this tax in their tax return. Income from companies abroad is subject to withholding tax abroad, which varies depending on the country. The possibility of a refund depends on the double taxation agreement between Switzerland and the country of domicile of the foreign debtor.
There are several exceptions when taxing dividends from Swiss companies: Dividends arising from capital contribution reserves rather than profits are not taxed. If you are a shareholder holding at least 10 percent of the share capital, you enjoy the privilege of partial taxation on dividends (taxed at 70 percent by the Federation and at least 50 percent by the cantons).

Capital gains

Capital gains are profits from the sale of shares, funds or bonds if they are sold at a higher price than the purchase price. If you sell securities at a profit as a private individual, these price gains are generally tax-free, provided these securities are held as private and not business assets.

Additionally, the Federal Tax Administration FTA defined criteria to examine whether a person might be classified as a professional securities trader:

  • A holding period of at least six months must be met.
  • Income from capital gains must not exceed a certain proportion of your own net income.
  • The transaction volume (sum of purchase and sale prices of all securities) must not exceed five times the total value of the portfolio at the beginning of the year.
  • Trading in securities should not represent your main income.
  • Your securities must not be financed with external funds, such as loans. In other words, your taxable income must be higher than the debt interest.
  • Derivatives or options may only be traded for hedging purposes.

If only some of these criteria are met, it cannot be assumed that the assets are managed privately. However, the final assessment lies with the tax authorities, whereby it should be noted that they are extremely unlikely to classify an individual as a securities dealer. The consequences of this classification would include:

  • All capital gains (including future gains) from securities would be subject to progressive income tax.
  • All capital gains as well as income would be subject to OASI. This would amount to an additional deduction of around 10 percent. The capital gain is the difference between the proceeds of a sale and the original acquisition cost. If, for example, you bought shares ten years ago, the purchase price at that time applies.
  • You can deduct capital losses for tax purposes for seven years if they have been recorded and registered as such.

Withholding tax: Why is it deducted and how can you reclaim it?

Withholding tax is a tax levied at source by the federal government. It amounts to 35 percent of income from movable capital assets, such as interest or dividends. It applies to Swiss sources such as securities, bank accounts, etc.
This means you only receive 65 percent of the interest and dividends from your bank – the remaining 35 percent is paid directly to the Federal Tax Administration FTA. Withholding tax is primarily used to combat tax evasion, as payment of the tax means all investment income is disclosed to the tax authorities.

To avoid disadvantaging investors with this approach, as a taxpayer resident in Switzerland you can reclaim the withholding tax through their tax return. To do so, you must list any interest as income and the corresponding credit balance as assets in the list of securities on your tax return. Once this has been fully completed, you will receive the 35 percent withholding tax back from your cantonal tax authority. It will then be offset against your cantonal and municipal taxes or refunded. For taxpayers living abroad, the refund depends on whether a double taxation agreement exists.

The chart shows the process by which taxpayers in Switzerland can reclaim withholding tax.

The state also deducts the withholding tax directly from winnings from lotteries and skill-based games used for sales promotion, unless they are classified as tax-exempt by the Federal Act on Direct Federal Taxation. Pensions and benefits from insurance policies (life insurance, pillar 3) are also subject to withholding tax. This tax rate is lower (15 or 8 percent) and depends on the type of product.

How to record investment income in your tax return

Here’s how to proceed step by step:

Good to know

UBS provides you with all the important documents you need for your tax return in Mobile Banking and E-Banking.

Select “Bank documents” in your profile; you will find all the main documents in the “Tax reporting” folder. These documents are often sufficient as proof, and you can avoid filling out the securities list in the tax return separately

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Conclusion: Take the right steps with the right information

  • Private individuals generally do not have to pay taxes on capital gains from the sale of stocks and can reclaim some of the tax on investment income.
  • However, it is important to know which taxes apply to what, as tax regulations vary depending on the canton and individual situation.
  • You must declare all income in your tax return to receive a refund of the withholding tax.

In addition to non-taxable price gains, interest income from pillar 3a and your vested benefits accounts – provided this is for your retirement – also remain untaxed.

Good to know

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