mBank S.A.

Earnings Release • Nov 28, 2025

Report Content Impact of the Change in Corporate Income Tax Rate on the Net Resultof the mBank Group in 2026 and in Q4 2025 Due to the Revaluation of theNet Position Related to Deferred Income Tax.Following thesigning by the President of the Republic of Poland of the Act ofNovember 6, 2025 Amending the Corporate Income Tax Act and the Act onTax on Certain Financial Institutions, the Management Board of mBankS.A. ("Bank") announces that the net result of the mBank Group in 2026will decrease by an amount between PLN 800 million and PLN 900 milliondue to an increase in income tax expense. The actual impact on the netresult will depend on the gross result achieved in 2026.

Furthermore, the Bank has estimated the impact of the change in thecorporate income tax rate on the value of the deferred tax asset basedon balance sheet data available as of 30 September 2025. The value bywhich the deferred tax asset would increase amounts to PLN 125 millionand would positively affect the net result of the mBank Group. Theactual impact of the change in corporate income tax rates on the netresult in Q4 2025 may differ from the stated amount due to fluctuationsin the Bank's balance sheet positions.