Swiss initiative leaves marriage tax costs unclear
Tuesday 10th November 2026 on 20:46 in
Switzerland
The cost of the Centre Party’s initiative on married couples’ taxes cannot yet be calculated, SRF reports, because key details of its proposed system remain open. The initiative, “Yes to fair federal taxes for married couples,” will go to a vote on November 29.
If approved, married couples would continue to be taxed jointly for federal income tax. But the initiative does not specify the tax model, rates or deductions. The effects on unmarried taxpayers would also depend on whether and how the resulting revenue shortfalls were offset.
Of 13 models assessed by Parliament during its discussions, one would cost the state as much as individual taxation. The others would be more expensive for the state and would also place an additional burden on middle-income households. Depending on the model and its details, the federal government estimates annual revenue losses of between 680 million and 3 billion Swiss francs.
The cantons would also be affected because they receive 21.2 per cent of direct federal tax revenue. Cantons remain divided: some support the individual taxation law approved in a vote in spring 2026, while others back the Centre Party’s initiative.
Thurgau Finance Director Urs Martin, of the Swiss People’s Party, hopes the initiative will pass, saying it could spare cantons the administrative work of switching to individual taxation. He said he could not assess the effects on tax revenue or taxpayers because the details were unavailable.
Basel-Stadt, by contrast, supports individual taxation. Finance Director Tanja Soland, of the Social Democratic Party, expects the transition to be manageable. She warned that approval of the initiative would mean joint taxation for federal tax but individual taxation for cantonal and municipal taxes, creating three different systems.
The individual taxation law has a defined framework, and cantons are preparing for its introduction. The initiative does not yet have comparable details, leaving its costs and effects on taxpayers and the state uncertain.
The debate follows decades of efforts to end the so-called marriage penalty. Parliament commissioned work on individual taxation in 2020, while the Centre Party submitted its current initiative in 2024.