For Polish investors, P2P taxation often looks straightforward because the headline rate is familiar. In practice, the harder part is making sure foreign platform income is reported correctly, understanding how the Belka tax framework applies, and keeping the currency-conversion records needed when interest and repayments arrive in euros rather than złoty.

How Poland usually taxes P2P income

In many standard cases, P2P income is treated within the 19% capital-income framework commonly associated with the Belka tax. That makes the tax rate simpler than in countries with progressive savings brackets, but it does not remove the need to track foreign income carefully when platforms operate outside Poland.

Which form usually matters

For many investors, the main filing route is through PIT-38. That is why accurate records of gross interest, loan-sale results, foreign tax withheld, and currency conversion values matter so much. A platform statement may summarize performance neatly, but the Polish filing still depends on the taxable numbers you can substantiate.

Foreign tax credits and FX issues

If tax was already withheld abroad, Poland may allow a credit within the normal treaty and domestic limits. The common traps are reporting only net income, using inconsistent exchange rates, and assuming platform fees or loan losses are automatically handled in the same way as plain interest. Investors using foreign platforms should keep a defensible PLN conversion trail for the relevant tax items.

Bottom line

For most Polish investors, the practical checklist is simple: start from the 19% Belka-tax framework, file the income through PIT-38, and keep strong FX and withholding-tax records for foreign platforms. If your portfolio spans several marketplaces, organized reporting can matter as much as the gross return.

Disclaimer: This article provides general information only and does not constitute tax advice. Always consult a qualified Polish tax adviser for guidance tailored to your situation.