Why are capital gains on Swiss securities generally tax-free for private investors?

Switzerland deliberately chose not to introduce a general capital gains tax on securities when it built its modern tax system. Private investors who buy and sell shares, bonds, ETFs, or similar instruments as part of ordinary personal wealth management are not taxed on their profits. This principle is embedded in both the Federal Direct Tax Act and cantonal tax laws, making Switzerland unusual among developed nations.

The rationale is that such gains are considered realised increases in existing wealth rather than new income, and Switzerland taxes wealth annually via the Vermögenssteuer instead. The system creates a trade-off: you pay wealth tax each year on your portfolio value regardless of performance, but keep the upside when you sell.

The exemption is not absolute. The FTA and cantonal authorities use a set of criteria — sometimes called the "five criteria" test — to identify professional traders whose gains are fully taxable as ordinary income. Relevant factors include the holding period, trading frequency, use of borrowed capital, the reinvestment of gains, and whether securities income is a primary source of livelihood. There is no bright-line rule; cases are assessed individually based on the overall pattern of trading activity.

This is general information only, not professional tax advice. Consult a qualified tax professional for your specific situation.