Functioning of Wizarat during the period of Delhi Sultanate:

(i) Diwan-i-Wizarat was the most important office after the Sultan. It was a key position in the royal court and his role was of a general supervisor over all departments, though he was one of the four important departmental heads.

(ii) Wizarat was the chief advisor to the Sultan. The main functions of the wazir were to look after the financial organisation of the State, give advice to the Sultan, and on occasions to lead military expeditions at Sultan's behest. He also supervised the payment to the army.

(iii) The Wizarat or the office of wazir also kept a check on land revenue collections, royal maintained a record of all the income and expenditure incurred by the state and thus controlled or recorded the salaries of all servants, handled the charitable donations such as Waqfs, Inams etc.

(iv) The Wizarat also supervised the mints, the intelligence departments, the royal buildings and other bodies affiliated to the royal court. The wazir had direct access to the Sultan and it was on his wisdom, sincerity and loyalty that the position of the Sultan depended greatly.

(v) There were several other departments which worked under the wizarat. They were entrusted with specific functions. These included Mustaufi-i-Mumalik (Auditor General), Mushrif i-Mumalik (Accountant General), Majumdar (Keeper of loans and balances from treasury).

(vi) Later Diwan-i-Waqoof (to supervise expenditure), Diwan-i-Mustakharaj (to look into the arrears of revenue payments), Diwan-i-Amir Kohi (to bring uncultivated land into cultivation through state support) were also brought under the supervision of the Wizarat.