Investor Presentation - Q2 2021

Results of mBank Group: Total costs and efficiency Best-in-class efficiency anchored in disciplined cost management, despite investments Development of mBank Group's operating costs PLN M Cost/Income ratio of mBank Group - quarterly 43.1% 43.2% 42.5% +1.5% +3.1% +X.X% -12.7% Excluding the BFG 41.7% +8.6% 664.7 37.3% 40.2% 40.2% 38.9% A QOQ ΔΥΟΥ 571.5 566.7 130.4 580.2 36.8% 32.8 536.6 25.0. 34.6% 33.7 34.4 23.1 112.3 116.4 108.3 Q2/20 108.5 111.9 +0.4% -3.5% 11.6 9.3 11.9 Q3/20 reported Q4/20 Q1/21 Q2/21 normalized (linear BFG) -7.7- -10.4- 153.9 174.3 183.9 147.1 163.4 +18.4% +13.3% Normalized Cost/Income ratio for H1/21 39.6% Employment of mBank Group (in FTEs) End of period 259.2 229.0 222.7 241.7 257.1 +6.4% -0.8% Q2/20 Q3/20 Q4/20 Q1/21 Q2/21 Personnel costs Material costs Other costs Amortization Contributions to the BFG including Resolution Fund in Q1/21 Investor Presentation - Q2 2021 -186 -2 6,827 6,754 6,688 6,643 6,641 06/20 09/20 12/20 03/21 06/21 1 21

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