14. Is there a limit on the amount a donor can contribute to a political party during a non-election specific period?

The total sum of payments from a natural person to a political party, excluding membership fees [...], and payments to the Election Fund of a political party may not exceed one year, 15 times the minimum wage, established on the basis of separate regulations, in force on the day preceding payment.
Source: Article 25.4, Law on Political Parties,1997 (consolidated text 2018)

The maximum donation for a political party is 15 times the minimum wage from Polish citizens having permanent residence in the Republic of Poland per year. The maximum donation amount in 2020 is PLN 39,000 (approx. EUR 9,000). Donations from the same person to many political parties are allowed.