NATO to Unveil $500 Billion Defense Fund at May 24 Brussels Summit, U.S. Pledges $75 Billion

The Brussels Fund

NATO will unveil a $500 billion defense and infrastructure fund at its May 24 summit in Brussels, according to two U.S. defense officials familiar with the plan. The fund, drafted under the working title "Allied Capability Pledge 2026," will be backed by collective bonds guaranteed by member states and will finance joint procurement, air defense networks, munitions production, and hardened logistics corridors along the alliance's eastern flank, the officials said. The announcement is scheduled for the summit's closing session at 4 p.m. CEST on May 24 at NATO headquarters, following a morning plenary that begins at 9 a.m.

The initiative marks the first time NATO has structured a multi-year financing vehicle of this size outside national defense budgets. One of the officials said the alliance expects to issue the first tranche of bonds, valued at roughly $120 billion, before the end of the third quarter of 2026. The bond proceeds would be administered through a special purpose vehicle registered in Luxembourg, with procurement contracts routed through NATO's Support and Procurement Agency and national armaments directors, the official said.

How the Bonds Would Work

The financing model relies on joint and several guarantees from participating allies, with the United States, Germany, France, and the United Kingdom serving as the four anchor guarantors, according to a diplomat at NATO headquarters who was briefed on the draft communiqué. Each anchor nation would underwrite up to 22 percent of the principal, while the remaining obligations would be divided among other contributors based on a formula tied to gross national income and existing defense spending. The bonds would carry a 30-year maturity and would be marketed to institutional investors as well as central banks, the diplomat said.

Proceeds would be released in phases tied to verified procurement milestones. The first phase, worth $90 billion, would fund air and missile defense batteries, electronic warfare systems, and prepositioned munitions stockpiles in Poland, Romania, and the Baltic states. A second phase, totaling $140 billion, would finance submarine cable protection, military mobility railheads, and hardened aircraft shelters from Norway to Bulgaria. The final phase would cover cyber defense, space surveillance, and joint training ranges, the diplomat said. Member states that fail to meet spending commitments would face adjustments to their voting weight on procurement decisions, a provision included in an annex labeled "Allied Capability Pledge 2026: Implementation Framework."

The bond structure drew on a feasibility study completed in April by the European Investment Bank and the NATO International Staff, according to a congressional aide on the Senate Foreign Relations Committee who was briefed May 20. That study, titled "Alliance Capitalization Options for Long-Range Deterrence," concluded that a jointly guaranteed vehicle could lower borrowing costs for smaller allies by roughly 40 basis points compared with national issuance, the aide said.

U.S. Role and Congressional Review

The United States will pledge $75 billion over three years as its anchor contribution, the two defense officials said. Roughly $30 billion would be allocated in fiscal year 2027, with $25 billion in fiscal year 2028 and $20 billion in fiscal year 2029. The money would flow through a new budget line at the Defense Department labeled "NATO Joint Capability Fund," with the first tranche requiring congressional approval through the fiscal 2027 National Defense Authorization Act, the officials said.

The Senate Foreign Relations Committee aide said staffers received a classified summary of the plan on May 19 and expect a formal notification letter from the Pentagon comptroller by May 26. House Armed Services Committee members have requested a briefing for June 2, the aide said. Congressional leadership was told the administration would treat the $75 billion as a three-year commitment subject to annual appropriations rather than a single upfront authorization, which could reduce friction with fiscal conservatives, according to the aide.

Secretary of Defense Lloyd Austin is expected to arrive in Brussels on May 23 aboard a C-32A aircraft and will stay at the Hotel Le Plaza ahead of the summit, according to a U.S. defense official. The secretary is scheduled to hold a bilateral meeting with his German counterpart at NATO headquarters at 11 a.m. on May 24, one hour after the plenary begins, the official said.

Reaction and Next Steps

Officials cautioned that the final text remained subject to last-minute negotiation, particularly language on burden sharing and procurement preferences for European defense firms. A diplomat at NATO headquarters said France and Germany were pressing for at least 60 percent of prime contracts to be awarded to companies based in the European Union, while the United States and the United Kingdom favored a transatlantic open-bidding rule. The dispute could be resolved in a side letter attached to the main communiqué, the diplomat said.

If the announcement proceeds as planned, NATO Secretary General Mark Rutte would present the fund during the May 24 closing news conference. Alliance staff have reserved the main press auditorium at NATO headquarters for 4:30 p.m. CEST that day. European Union defense ministers are then expected to meet on May 25 in Brussels to align the bloc's own Permanent Structured Cooperation projects with the NATO fund, according to the congressional aide.

The first bond issuance is tentatively scheduled for late July, with pricing expected in Frankfurt and London. Watch for the formal filing with Luxembourg's financial regulator by May 27, the May 24 communiqué text, and congressional hearings during the first week of June.