Switzerland first levied a wealth tax in 1840 and its been a pillar of their tax structure since. They're self-reported and paid annually, with no institutional tracking of wealth. Tax authorities can only access personal bank information if a person is suspected of a crime.
The country has a decentralized tax system, and the rate varies around its 26 cantons. But it ranges between 0.3% and 1% of taxpayers' net worth. They tend to be highest in the French-speaking regions of the west and lower in the German-speaking cantons of central Switzerland.
The tax-free threshold for a married couple without children is between 50,000 Swiss francs ($50,370) to 250,000 Swiss francs ($251,856). "The wealth tax thus affects much of the middle class in addition to the wealthiest families," one study on the Swiss wealth tax found.
Compared to the other three European countries, the Swiss wealth tax has generated consistent revenue so far in the 21st century and it brought the largest share. OECD data shows that wealth taxes made up 3.6% of all Swiss tax revenue in 2017, and it's been above 3% since 2000.