Donations of up to 20 percent of your personal income may be deducted from your income tax. If one exceeds this limit, donations can be “carried forward” indefinitely for use in the coming years and deducted from the tax debt then. In addition, there is the possibility for higher subsidies, whereby up to 1 million euros can be claimed for tax purposes over a period of 10 years. For donations abroad, the donor must provide proof of charitable status.
Donations credit: Under 200 EUR: Transfer/proof of payment is sufficient as a simplified donation receipt. From 200 EUR: Donation receipt from aid organization required.
Further information: Austria: https://www.bmf.gv.at/steuern/selbststaendige-unternehmer/einkommensteuer/absetzbarkeit-spenden.html Switzerland: http://www.zewo.ch/Dokumente/Publikationen/Steuern/Steuerabzug_d_2014.pdf