United Nations Issues: U.S. Funding of U.N. Peacekeeping [Updated April 20, 2022] [open pdf - 561KB]
From the Document: "The United States is the single largest financial contributor to United Nations (U.N.) peacekeeping activities. Congress authorizes and appropriates U.S. contributions, and it has an ongoing interest in ensuring such funding is used as efficiently and effectively as possible. The United States, as a permanent member of the U.N. Security Council, plays a key role in establishing, renewing, and funding U.N. peacekeeping operations. For 2022, the United Nations assessed the U.S. share of U.N. peacekeeping at 26.94%; however, since 1994 Congress has capped the U.S. payment at 25% due to concerns that U.S. assessments are too high. Congress appropriated $1.5 billion to most U.N. peacekeeping activities for FY2022 (up to the 25% cap). Most recently, President Biden's FY2023 budget proposes full U.S. funding for U.N. peacekeeping, including the payment of U.S. peacekeeping arrears."
CRS In Focus, IF10597
Congressional Research Service: https://crsreports.congress.gov/