ICE is funded through 2029 primarily by a $75 billion multi-year appropriation included in the "One Big Beautiful Bill Act" passed in July 2025, with funds remaining available until September 30, 2029. This funding was allocated through budget reconciliation, bypassing the annual appropriations process and giving ICE significant discretion in how to spend it.

Key components of the funding include:

$45 billion designated for immigration detention capacity, including new detention centers, family residential facilities, and retrofitted warehouses. Approximately $30 billion for enforcement operations, such as hiring 10,000 new officers, fleet modernization, and facility upgrades. The funding allows ICE to enter long-term contracts, purchase property, and expand infrastructure without needing annual congressional approval. While ICE is effectively funded through FY2029, political battles continue over annual DHS appropriations, with some lawmakers attempting to block additional enforcement funding or impose oversight—though the large unobligated balance limits the immediate impact of such efforts.