If you pay more than 18,130€ per year in income tax, you must pay a solidarity surcharge (Solidaritätszuschlag or Soli). It’s a percentage of your income tax. Most people pay no solidarity tax because their income is too low.
If you pay more than 18,130€ per year in income tax, you must pay a solidarity surcharge (Solidaritätszuschlag or Soli). It’s a percentage of your income tax. Most people pay no solidarity tax because their income is too low.