It offers retail, corporate and investment banking as well as other financial services such as leasing, factoring, insurance, financing of commercial real property, brokerage operations, wealth management, corporate finance and advisory in the scope of capital markets.

In September 2019 mBank's parent company Commerzbank announced they wanted to sell their 69.3 percent stake in the bank.

[13] In early 2020, Commerzbank then abandoned their plans, as they were not able to sell under favorable conditions due to the Covid-19 pandemic.

For a number of years mBank was able to manage this loan unprofitability by charging debtors installment fees, so-called "spreads".

In addition, clauses regulating linkage between Swiss Franc and Polish Zloty in the loan agreements used by mBank were found unfair and included in the unfair clauses register maintained by the Office of Competition and Consumer Protection.

[17] Since the European Council Directive 93/13/EEC of 5 April 1993,[18] contract terms found to be unfair should not bind consumers, the linkage between Swiss Franc and Polish Zloty present in mBank agreements was undermined.

Therefore, a number of legal proceedings ensued, including a class action lawsuit started by 1,247 debtors.

[19] One of the side effects of the raising exchange rate is growth in the loan-to-value ratio of the foreign loans.

[21] It was announced in July 2019 that Commerzbank was being investigated by the European Central Bank and BaFin for facilitating its subsidiary mBank's toxic financial product offering in Poland, as well as for the linked potential tax evasion resulting from Commerzbank's financing of mBank's CHF-linked toxic financial products.