The cross-border commuter regulation with Austria applies to anyone who lives in Germany and regularly commutes to their workplace in Austria. Two conditions must be met:
If you do not return to your place of residence on a maximum of 45 working days per year or work outside the border zone for your employer, this is not a problem (so-called non-return days).
Activities outside the border zone also include activities in a third country.
Please note that there are special and discretionary regulations for cross-border commuters due to the coronavirus pandemic, as daily commuting was often not possible. Further information can be found on the Federal Ministry of Finance website.