The Thüringer Aufbaubank (TAB) is a German development finance institution of the Free State of Thuringia.

[2] The tasks of the bank include, in addition to economic development, the promotion of housing and urban development, the promotion of technology, the financing of public customers, agriculture, environmental protection and infrastructure.

[4] Its subsidiary bm-t beteiligungsmanagement thüringen gmbh also allows Thuringian companies to obtain equity capital.

The lending business of the development bank is fully refinanced on the money and capital markets.

To this end, the bank issues bonds or resorts to funds from financing agreements.