GDANSK, May 13 (Reuters) - Poland's biggest bank PKO BP PKO.WA posted a 20.8% year-on-year rise in its first-quarter net profit on Tuesday due to improved core business income.
The largest Polish bank by total assets reported a profit of 2.47 billion zlotys ($647.33 million) for the quarter, beating market expectations of 2.44 billion zlotys, according to data in bank-compiled consensus.
The lender's quarterly net interest income grew 15.2% to 5.98 billion zlotys.
($1 = 3.8157 zlotys)
(Reporting by Adrianna Ebert, editing by Milla Nissi-Prussak)
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