How to Declare US Stocks on Your Swiss Tax Return

First: W-8BEN

The US normally applies 30% withholding tax to dividends paid to foreign investors.

For Swiss residents, the Switzerland-US tax treaty can reduce that to 15%.

The mechanism is the W-8BEN.

Your broker normally provides it electronically. Once it is correctly registered, US withholding on eligible dividends falls from 30% to the treaty rate of 15%.

This isn't something you want to discover several years after buying your first US dividend stock.

Check your broker account once and make sure the form is actually there.

Then comes DA-1

The remaining 15% US withholding does not necessarily have to become a permanent cost.

Swiss residents can generally claim relief through DA-1, alongside their normal Swiss tax return.

This is where one small accounting detail matters enormously.

Suppose a company declares a dividend of CHF 100 equivalent and CHF 15 is withheld. Your account receives CHF 85.

It is tempting to simply enter CHF 85 into the tax return. Don't think about the transaction that way.

There are two numbers: the gross dividend of CHF 100, and the foreign tax withheld of CHF 15.

The gross income and the withholding need to remain visible separately for the tax credit mechanism to work correctly.

What about capital gains?

This is where Switzerland becomes considerably more attractive.

For someone classified as a private investor, capital gains on securities are generally not subject to Swiss income tax.

Sell a US share for more than you paid and, assuming you retain private-investor status, that gain is normally tax-free.

Dividends are different: they are taxable income.

That distinction can have a surprisingly large effect on long-term portfolio construction. A company returning capital primarily through share-price appreciation can produce a very different Swiss tax outcome from one distributing a large proportion of its return as dividends.

And accumulating ETFs?

They are useful, but they don't make Swiss dividend taxation disappear.

An accumulating ETF reinvests income internally rather than paying the cash into your account. Swiss taxation can nevertheless attribute that income to you.

So “I didn't receive the dividend” does not automatically mean “there is no taxable income.”

The three things I would check

If you hold US securities from Switzerland, I would verify three things once rather than rediscovering them at tax time.

One: is your W-8BEN valid?

Two: is your broker statement showing gross dividends and withholding separately?

Three: are you claiming eligible foreign withholding through DA-1?

The paperwork isn't particularly exciting. But losing 15% of a dividend simply because a box wasn't completed is even less exciting.