Why It Matters

U.S. security assistance to Ukraine is shifting toward a model that relies more heavily on European allies and NATO-funded purchases of American weapons as large-scale U.S. appropriations have declined from their wartime peak, according to a recent Congressional Research Service report.

A recent report on U.S. security assistance to Ukraine examines a significant shift in funding and policy priorities with implications for Congress and the Trump administration. The U.S. had committed $67.8 billion in defense articles and services to Ukraine through Presidential Drawdown Authority, Foreign Military Financing and the Ukraine Security Assistance Initiative as of March 31. Congress has not enacted another emergency supplemental appropriation for the Ukraine response comparable to the packages enacted between 2022 and April 2024.

The Trump administration has generally moved away from the scale of direct U.S.-funded security assistance provided between fiscal 2022 and fiscal 2024 while continuing certain previously committed assistance. At the same time, European allies have taken on a larger share of Ukraine's military support. The Defense Department reported that European security assistance allocations increased substantially in 2025 while U.S. appropriated assistance declined sharply.

The Big Picture

The scale of U.S. involvement since Russia's full-scale invasion has been substantial. Presidential Drawdown Authority allowed the president to transfer defense articles directly from existing Defense Department stocks. From August 2021 through January 2025, the Biden administration announced 74 drawdowns for Ukraine. As of March 31, about $4.96 billion in previously authorized PDA remained available for Ukraine assistance.

Delivery has lagged commitments under some programs. As of March 31, approximately $19.21 billion, or 57%, of Ukraine Security Assistance Initiative funding had resulted in equipment delivered to Ukraine. Because public figures generally measure commitments or appropriations rather than the value of equipment actually delivered, the total value of security assistance received by Ukraine may differ from headline U.S. commitment figures.

Congress has continued authorizing more targeted assistance. The fiscal 2026 National Defense Authorization Act authorized $400 million annually for the Ukraine Security Assistance Initiative in fiscal 2026 and fiscal 2027 and extended the program through Dec. 31, 2029. The law represented a compromise between House and Senate proposals over the amount and duration of continued USAI support.

The administration, however, had opposed additional USAI funding during consideration of the defense authorization bill. Congressional debate over the legislation highlighted the emerging divide between lawmakers seeking continued direct U.S. assistance and an administration emphasizing a different approach to supporting Ukraine.

Allied contributions have increasingly supplemented U.S. assistance. As of March, U.S. allies and partners had committed approximately $130 billion in security assistance to Ukraine since February 2022, compared with $67.8 billion committed by the United States through PDA, Foreign Military Financing and USAI. Defense officials reported that NATO allies and partners had assumed primary responsibility for financial support to Ukraine, including ammunition, air defense and maintenance assistance.

The Prioritized Ukraine Requirements List initiative, launched in 2025, provides another mechanism for allied burden-sharing by allowing NATO allies to finance packages of U.S. defense articles for Ukraine. Allied commitments through the initiative had reached billions of dollars by early 2026.

The administration has also signaled openness to other approaches. On July 8, President Donald Trump said the United States was considering options that could allow Ukraine to coproduce Patriot missiles. Separately, the United States-Ukraine Reconstruction Investment Fund has begun investing in Ukrainian projects, although those investments should be distinguished from congressionally appropriated security assistance.

Oversight remains a central congressional concern. The Department of Defense has not identified credible evidence of illicit diversion or misuse of U.S.-provided defense articles, according to oversight reporting. The Defense Department also briefly paused some weapons shipments to Ukraine in 2025 before resuming them.

The Bottom Line

U.S. support for Ukraine is moving away from the extraordinary levels of direct appropriations enacted during the first years following Russia's full-scale invasion and toward a mix of previously authorized U.S. assistance, more limited congressional funding and greater allied financing.

European countries and other U.S. partners have already taken on a larger share of Ukraine's military support, while programs allowing NATO allies to purchase U.S.-made weapons for Ukraine provide an alternative to direct U.S. appropriations. Congress nevertheless continues to authorize targeted Ukraine assistance, including $400 million annually for USAI in fiscal 2026 and fiscal 2027.

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