The Nidhanpur copperplate inscription records a 7th-century land grant to 200 Brahmins near the Kushiyara River by King Bhaskaravarman.

[5] In the medieval period, the scarcely inhabited area of Panchakhanda was a feudal monarchy under Kalidas Pal and his descendants who assumed the title Raja.

[10][11] The Pals significantly developed and cultivated Panchakhanda allowing the migration of groups such as the Mahimals (who were led by their two Sardars Raghai and Basai) into the area.

[8] After the Conquest of Sylhet in 1303, Khwaja Adina Sufi – a disciple of Shah Jalal – migrated to what is now Adinabad in Charkhai (in Beanibazar) where he preached Islam to the local people.

[8] The name Beanibazar is derived from the existing Bihani Bazaar ("Morning Market") which was founded by the local landowner Krishna Kishore Pal Chowdhury.

[14] On 29 December 1912, a cultivator in Nidhanpur village discovered what he thought was a clue to the location of a hidden treasure, during the process of building his buffalo shed.

He took the plates to a local landholder who brought them to the attention of authorities in Silchar, thus rediscovering the Nidhanpur copperplate inscriptions.

Beanibazar had a literacy rate (age 7 and over) of 59.69%, compared to the national average of 51.8%, and a sex ratio of 1046 females per 1000 males.