The contrast with Austria
This is the sharpest difference between the German and Austrian pay systems – and it runs the opposite way from what you might expect. In Austria the 13th and 14th salary (holiday and Christmas pay) are built in: almost every employee expects them, and – within the so-called annual-sixth (Jahressechstel) – they are taxed at their own, markedly lower flat rate. An Austrian calculator that left them out would look broken.
Germany has neither: no statutory right to a 13th salary and no favourable taxation for it. Where Austria has a predictable, tax-privileged special payment, Germany treats the same payment as an ordinary other payment at your full marginal rate. That is why a German monthly calculator can show a clean net figure without pricing in the Christmas bonus – here it is not a fixed part of the system but a contractual extra.
