Already in 695, al-Hajjaj began minting the new gold and silver coins, which superseded the Byzantine and Sasanian coins still used until then.
He established mints at Kufa and later in Wasit and decreed strict punishments for counterfeiters.
The new coins contained the name of Allah, and hence were initially opposed by many theologians who argued that they would also be used by infidels, but they quickly became a success and "helped to promote the circulation of money and the stabilization of economic conditions" (A. Dietrich).
Al-Hajjaj also ordered the translation of the tax registers (diwān) into Arabic from the Persian in which it had hitherto been kept, so that he could supervise it personally.

Following his victory over the Iraqis, al-Hajjaj began a series of reforms aimed at restoring tranquility and prosperity to the troubled state after almost twenty years of civil war and rebellions.
He invested much effort in reviving agriculture, especially in the Sawad, and thereby increasing revenue through the kharāj (land tax).
He began to restore and expand the network of canals in lower Iraq.
According to al-Baladhuri, he spared no expense to repair embankments when they broke, awarded uncultivated lands to deserving Arabs, and took measures to reverse the flow of the rural population to the cities, especially the new converts (mawālī).
According to the historian Ibn Abd al-Hakam (d. 871), al-Hajjaj, with the support of Abd al-Malik, was the first to collect the jizya (poll tax) from the mawālī, though its imposition was nominally restricted to non-Muslim subjects of the Caliphate.
Already in 695, al-Hajjaj began minting the new gold and silver coins, which superseded the Byzantine and Sasanian coins still used until then. He established mints at Kufa and later in Wasit and decreed strict punishments for counterfeiters. The new coins contained the name of Allah, and hence were initially opposed by many theologians who argued that they would also be used by infidels, but they quickly became a success and "helped to promote the circulation of money and the stabilization of economic conditions" (A. Dietrich). Al-Hajjaj also ordered the translation of the tax registers (diwān) into Arabic from the Persian in which it had hitherto been kept, so that he could supervise it personally.
Following his victory over the Iraqis, al-Hajjaj began a series of reforms aimed at restoring tranquility and prosperity to the troubled state after almost twenty years of civil war and rebellions. He invested much effort in reviving agriculture, especially in the Sawad, and thereby increasing revenue through the kharāj (land tax). He began to restore and expand the network of canals in lower Iraq. According to al-Baladhuri, he spared no expense to repair embankments when they broke, awarded uncultivated lands to deserving Arabs, and took measures to reverse the flow of the rural population to the cities, especially the new converts (mawālī). According to the historian Ibn Abd al-Hakam (d. 871), al-Hajjaj, with the support of Abd al-Malik, was the first to collect the jizya (poll tax) from the mawālī, though its imposition was nominally restricted to non-Muslim subjects of the Caliphate.
Al-Hajjaj ibn Yusuf