Switzerland, Germany and parts of Austria, Denmark, Finland and Sweden run church-tax systems. In Switzerland, registered Catholics, Reformed Protestants and Christian Catholics pay 2–15% of their cantonal tax, depending on canton and parish. Companies are taxed in some cantons regardless of the owners' religion.
In Germany, church tax is 8% of income tax in Bavaria and Baden-Württemberg, 9% elsewhere. For a Munich engineer earning EUR 70,000, that adds roughly EUR 1,250 to the annual tax bill. Members can leave the church via a formal declaration (Kirchenaustritt) at the registry office, which terminates the tax obligation but also membership rights.
Church tax is deductible from federal income tax in Germany. In Switzerland, it is fully deductible from federal direct tax. Non-members and members of non-recognised faiths pay nothing.
A Reformed Protestant in Zurich earning CHF 100,000 pays CHF 12,500 in cantonal tax and an additional CHF 1,250 (10%) church tax. Leaving the church before year-end avoids next year's church tax but ends religious-rite entitlements.