According to § 3 paragraph 11 of the German Income Tax Act (§ 3 Abs. 11 Einkommensteuergesetz (EStG)), such payments are considered social support (sozialer Zuschuss) and are not subject to taxation, meaning they are not included in taxable income calculations.
"Interestingly, the most difficult tasks are usually handled by experienced professionals, while volunteers help with softer and emotionally meaningful aspects."
"The best way to learn a language is to start teaching it."