Civics Guide

How does Congress fund immigration enforcement?

A look at how federal immigration agencies are funded, what the money pays for, and how Congress decides how much to spend.

How Government Works 6 min read Updated Jun 2026

Key takeaways

A look at how federal immigration agencies are funded, what the money pays for, and how Congress decides how much to spend.

DHS agencies ICE and CBP carry out most federal immigration enforcement.

ICE received about $9.4 billion and CBP about $19.8 billion in FY2024.

Southwest border encounters fell from 2.05 million in FY2023 to 1.53 million in FY2024.

Appropriations typically need 60 Senate votes unless passed via reconciliation.

Immigration courts, separate from enforcement, face a backlog of more than 3 million cases.

Quick answer

Here’s the short version.

Congress funds immigration enforcement primarily through annual appropriations to the Department of Homeland Security, which houses ICE and Customs and Border Protection. Lawmakers can also pass supplemental funding bills, like a recent Senate measure proposing roughly $70 billion in additional enforcement spending. The size of these appropriations is a recurring subject of political debate.

Which agencies handle immigration enforcement?

Most federal immigration enforcement is carried out by two agencies within the Department of Homeland Security. U.S. Customs and Border Protection (CBP) patrols the border and staffs ports of entry, while U.S. Immigration and Customs Enforcement (ICE) handles interior enforcement, detention, and removal. A third entity, the Executive Office for Immigration Review, runs the immigration courts but sits within the Department of Justice, not DHS.

How much do these agencies currently receive?

In fiscal year 2024, ICE received roughly $9.4 billion in appropriations and CBP received approximately $19.8 billion. Those figures fund agent salaries, detention facilities, surveillance technology, transportation, and related operations. Funding levels have generally risen over the past two decades under both Democratic and Republican administrations, though the pace and emphasis have varied.

What is Congress considering now?

The Senate passed legislation that would provide DHS about $70 billion in additional immigration enforcement funding, sending the measure to the House. Supporters say the money is needed to expand detention capacity, hire more agents, and discourage unlawful crossings. Critics argue a significant share of any new spending should go to immigration judges and asylum officers, citing a court backlog exceeding 3 million pending cases.

How do border numbers fit in?

U.S. Border Patrol recorded roughly 2.05 million Southwest border encounters in fiscal year 2023, declining to about 1.53 million in fiscal year 2024. Lawmakers cite these figures to support competing conclusions: some argue the still-high totals justify more enforcement resources, while others say the decline shows current tools and policies are working and that funding should be targeted differently.

How does the appropriations process work?

Funding bills generally require a simple majority in the House and Senate plus the president's signature. In the Senate, however, most spending measures need 60 votes to overcome a filibuster. An exception is budget reconciliation, which allows certain fiscal legislation to pass with a simple majority but limits what can be included. These procedural rules often shape what immigration funding deals are politically feasible.

What are the main arguments on each side?

Proponents of significantly higher enforcement funding say it is necessary to secure the border, process arrivals more quickly, and remove individuals without legal status. Opponents counter that enforcement alone cannot resolve the system's bottlenecks and that without more judges, asylum officers, and legal infrastructure, additional detention and personnel may not reduce the backlog. Others question the overall cost or favor changes to underlying immigration law rather than added spending.

What to watch

Key indicators include whether the House takes up the Senate-passed bill, how any final package divides money among enforcement, courts, and processing, and how border encounter trends evolve. Voters weighing the question can consider both the scale of proposed spending and how it would be distributed across the immigration system.