BERN. The truce that settled over Swiss cantonal tax competition a decade ago is breaking down, and the fault line runs through Zug. The Federal Department of Finance has opened a consultation on the first comprehensive review of fiscal equalisation since 2016, and with it a question Bern has avoided for years: how much competition between cantons is healthy, and who pays for it.
Competition has shaped the fiscal map for a generation. Average cantonal corporate tax rates have fallen from about 24 per cent in 2005 to under 15 per cent today, with Zug, Nidwalden and Schwyz offering rates near 12 per cent. The contest delivered growth and attracted headquarters, but it also concentrated taxable profit in a handful of small cantons while mountain regions watched their bases erode.
Two forces pushed the issue back onto the federal agenda. The first is the global minimum tax of 15 per cent, collected in Switzerland through a supplementary levy since 2024, which has stripped low headline rates of much of their power. The second is the rising bill for national fiscal equalisation, which now redistributes CHF 5.6 billion a year from financially strong cantons to weaker ones.
The finance department's discussion paper proposes recalibrating the equalisation formula to reflect where companies actually book profits, and to reward cantons that broaden their tax base rather than deepen their discounts. It also floats a modest expansion of the resource index to include a canton's success in attracting internationally mobile firms, an idea Zug's finance director called, in a written statement, an incentive to fail.
The political stakes cut across party lines. Donor cantons such as Zurich, Zug and Geneva argue the system already punishes success; receiving cantons in the Alps and the Jura counter that without equalisation their public services would fall below a nationally acceptable standard. The Conference of Cantonal Finance Directors, usually a machine for consensus, is visibly split.
Reaction from business has been equally divided. Multinationals with Swiss headquarters warn that tinkering with the formula could unsettle location decisions taken over decades. Domestic manufacturers, concentrated in cantons that neither give nor receive large sums, tend to see the whole contest as a game played at their expense.
The numbers explain the tempers. The supplementary tax on minimum taxation brings in about CHF 1.8 billion a year, of which 75 per cent flows to the cantons where the profits are booked. Zug alone collects enough to cut its cantonal income tax while posting surpluses, a spectacle that finance directors in Valais and Jura describe, privately, as indecent.
Officials in Bern are careful to frame the review as modernisation rather than redistribution. “Competition did not end with the minimum tax, it merely changed its weapons,” a senior official in the Federal Department of Finance said, pointing to a new race in wealth tax cuts and lump sum arrangements for wealthy residents.
Critics on the left go further, arguing that cantonal competition has become a subsidy machine for the mobile rich, disciplined neither by voters nor by the market. Economists on the right answer that competition is the constitution's quiet genius: it disciplines spending, rewards good administration and keeps Switzerland's overall tax burden among the lowest in the developed world.
The consultation runs until January, after which the finance department will draft a bill expected to reach parliament in 2027. Because equalisation sits in the constitution, any deep reform requires a mandatory referendum with a double majority of people and cantons. The last such revision took five years from first paper to final vote.
The outcome matters beyond fiscal technicians. The balance between competition and solidarity is the load bearing wall of Swiss federalism, and it is being asked to carry new weight as the economy concentrates in cities and the Alps depopulate. Other federations, from Germany to Canada, study the Swiss formula; Switzerland is now studying it itself.
The most probable result, veterans of past rounds predict, is not an end to competition but its rerouting, from headline corporate rates towards wealth taxes, property levies and the discreet courting of wealthy residents. The contest, in other words, will continue by other means, which is precisely what the review is meant to manage rather than prevent.