BSI originated from three state-owned banks which are subsidiary of larger banks: BRIsyariah (of
Bank Rakyat Indonesia/BRI), Bank Syariah Mandiri (of
Bank Mandiri) and BNI Syariah (of
Bank Negara Indonesia/BNI). •
Bank Syariah Mandiri: The bank was founded in 1955 as
Bank Industri Nasional ("National Industrial Bank"); in 1967 it was changed into
Bank Maritim Indonesia ("Maritime Bank of Indonesia") and was changed again in 1973 into
Bank Susila Bakti. In 1999, the newly founded Bank Mandiri became majority shareholder of the bank, and was converted to sharia banking in 1999 as Bank Syariah Mandiri. •
BNI Syariah: The bank was founded on 29 April 2000 as a sharia banking unit of BNI. In 2010, it spun-off as a separate subsidiary. •
BRIsyariah: The bank was originally established on 3 July 1969 as
Bank Djasa Arta (later spelled
Bank Jasa Arta) and headquartered in
Bandung,
West Java. On 19 December 2007, the bank was acquired by BRI. Following
Bank Indonesia permit on 16 October 2008, it was converted to sharia banking and officially operated as BRI Syariah on 17 November 2008; in 2009 the sharia banking unit of BRI was officially merged to the bank. In 2018, the bank went public in
Indonesian Stock Exchange. Before the establishment of its rival Bank Syariah Nasional (BSN) in October 2025, BSI were supposed to acquire another state-owned bank
BTN Syariah, which was founded on 14 February 2005 as a sharia banking unit of
Bank Tabungan Negara (BTN). But BTN instead was supposed to acquire
Bank Muamalat Indonesia (BMI) and it would be finished in March 2024. , the acquisition plan of BMI by BTN was cancelled due to due diligence results. BTN then acquired 100% shares of Bank Victoria Syariah (BVIS) on 5 June 2025 as a step to facilitate the spin-off of the sharia banking unit into a BTN subsidiary. On 22 December 2025, based on the results of the Extraordinary General Meeting of Shareholders (EGMS), due to the inclusion of Indonesian government' special rights of the Republic of Indonesia in the ownership of Series A Dwiwarna Shares in BSI, the corporate status of the bank changed from previously a subsidiary of Bank Mandiri to a state-owned enterprise in the form of a state-owned (
Persero). Therefore, the official name of BSI was changed to
PT Bank Syariah Indonesia (Persero) Tbk,and the change of legal status took effect on 23 January 2026. ==Overseas branches==