I am also interested in this, IIRC my PKO and Mbank accounts are not that high.
credit argicole. 10% for 180 or 356 days at 10% rate. It was a special offer to limited number of customers in February
ING still has 7.5% offer.
That sounds like Santander.
How do you get such rates? I bank with Santander in Poland, and my savings account has been stuck at 0.01% for the past 2+ years. 7% is something I recently saw on time-limited deposits, not on generic savings account.
It's time limited saving accounts, but * self-renewing *. It automatically opens another saving account after this one expires.