NN Bank’s purpose is to help people care for what matters most to them. The bank serves more than one million customers in the Dutch market, helping them manage and protect their assets and income through mortgage loans, (internet) savings, bank annuities, consumer lending and retail investment products. In addition, it is an important supplier of mortgages as an asset class for NN Group's insurance subsidiaries and provides administration and management services to other NN Group entities and institutional investors.

To fund its activities, NN Bank aims to have access to diversified funding sources, in terms of investors, markets and maturities. NN Bank has a Covered Bond programme for its secured funding activities, as well as a Debt Issuance Programme for its unsecured funding. In addition, Standard & Poor’s has awarded NN Bank a credit rating.