The calculation of the wealth tax in the wiki post doesn’t look correct to me. Let’s assume a single tax resident in the city of Zurich without church taxes (total 219%).
- With a taxable net worth of CHF 308k, the marginal wealth tax rate is 0.22% up to CHF 694k.
- With a taxable net worth of CHF 694k, the marginal wealth tax rate is 0.33% up to CHF 1.3M
- With a taxable net worth of CHF 1.3M, the marginal wealth tax rate is 0.44% up to CHF 2.2M
The marginal wealth tax rate is what you save each year on your 3a assets by having your money in 3a instead of taxable accounts. If it crosses into the next tax bracket, you need to calculate a mixed tax rate, however, unlike what the current graph in the wiki would suggest, the wealth tax in Zurich is progressive. The maximum marginal wealth tax rate is 0.66%.
I.e., depending on your tax residency, the savings in wealth tax are far from negligible if you have significant taxable assets as well. I think of the wealth tax savings as roughly compensating the higher fees of Viac or finpension (compared to low cost ETFs at an inexpensive broker).