The administrative and revenue system of the Delhi Sultanate under which the Sultan assigned territories (iqtas) to nobles and officers (iqtadars or muqtis) in lieu of cash salary, in return for maintaining troops and remitting surplus revenue to the state.
Iltutmish as the introducer, the transferable versus hereditary shift under Firuz Tughlaq, and the iqta as a revenue-assignment (not ownership) are standard Sultanate-administration facts.
The iqta (Delhi Sultanate) is a revenue assignment, distinct from the later Mughal jagir and mansab; making iqtas hereditary under Firuz Tughlaq weakened, not strengthened, the centre.
Sultanate revenue-assignment system introduced by Iltutmish; iqtadars maintained troops and remitted surplus, originally transferable and non-hereditary.