How PLN lending actually works
Trade Republic and Revolut Ultra offer PLN-denominated savings yields that track the NBP's deposit rate. Trade Republic specifically offers DGS-protected PLN deposits at policy-rate-tracking yields (currently the highest sustained PLN retail yield in Poland). Bunq Premium offers tiered yield on PLN balances. Note that yield products on non-EUR currencies are limited at most EU neobanks — Revolut and Bunq are the main multi-currency yield providers.
Watchouts and hidden costs
Some EU neobanks present 'savings interest' that's actually a money-market fund pass-through, which is NOT covered by Bankowy Fundusz Gwarancyjny (BFG). Trade Republic specifically discloses whether each savings product is DGS-protected vs MMF-routed. Always check the deposit-protection footnote before parking material amounts of PLN above €100,000 (PLN equivalent).