Working in Switzerland, living in Germany: the Grenzgänger rule from 2026
Since 2026 the amended Swiss–German tax treaty applies. You are a Grenzgänger if you commute to work on at least 20 % of your contractual working days and stay away for work reasons on no more than 60 working days a year (fewer for a part year or part-time days). With the residence certificate Gre-1, Switzerland withholds at most 4.5 % of your gross pay; Germany taxes the whole salary and credits the Swiss tax up to 4.5 %.
In the German assessment the calculator deducts commuting costs (0.38 € per km, home-office days at 6 €, at least the 1,230 € allowance), the employee share of AHV/IV/EO and BVG as pension contributions, health and care cover, and unemployment and accident insurance within the 1,900 € cap, then adds the solidarity surcharge and church tax. If you are not a Grenzgänger, Switzerland taxes the pay for Swiss workdays with its ordinary withholding tax and Germany exempts it with progression, taxing only your home-office days.
Health insurance: within three months you choose between Swiss KVG (enter your premium; none is assumed) and voluntary German statutory insurance, whose full contribution — 14 % or 14.6 % plus the additional rate and care insurance — you pay yourself. Because the cover is deductible in Germany, the choice changes both your costs and your German tax. Not settled yet: the exchange-rate method of the German tax office and the treatment of the extra-mandatory BVG.