WARSAW: Poland's largest lender, PKO BP , is seen reporting a 21 percent fall in its first-quarter net profit because of costs associated with the bank's merger with its smaller peer Nordea Bank Polska, a Reuters poll showed.

The state-controlled bank is expected to report net profit of 638 million zlotys ($176.11 million) for the first quarter of 2015, based on the average of estimates from 11 banks and brokerages.

Copyright Reuters, 2015