Geneva voters will decide later this month if there should be a temporary tax levied on the very wealthy.
Under the plans put forward by left-wing parties – those with more than CHF 3m will have to pay an extra CHF 2,500 for every million above 3 for the next 10 years.
Backers say it will raise CHF 200m extra for the canton.
But others say it will make Geneva too expensive for the very rich - and may move out. They point out other cantons have better rates for the rich.
Grand Council Deputy for the Centre Party, Sébastien Desfayes, warns it could be a very pernicious move as the Geneva tax pyramid is highly reliant on a very small number of taxpayers.
Swiss Post announce job cuts
Autumn arrives in Switzerland
Driver warning in Vaud
Mixed results in school classrooms
Good news for household bills
Fuel reserves now in use
