How much does each NATO member contribute to the NATO Security Investment Programme (NSIP) in 2026?

1. NATO’s 2026 common‑funding picture and the implied NSIP ceiling

NATO’s Council approved ceilings for 2026 that allocate EUR 5.3 billion in total across the three common‑funded accounts (Civil Budget, Military Budget and the NATO Security Investment Programme) ^[1], and NATO’s materials list the Military Budget for 2026 as EUR 2.42 billion and a Civil Budget figure in the mid‑hundreds of millions (NATO cites EUR 528.2 million as a Civil Budget figure in reporting) ^[2]. Subtracting NATO’s stated Military and Civil ceilings from the EUR 5.3 billion total yields an implied NSIP ceiling of approximately EUR 2.35 billion for 2026 (calculation based on ^[1] and p1_s1).

2. How contributions are determined (and why a country‑by‑country list is not in the supplied sources)

Allies’ shares for common funding—including the NSIP—are set by an agreed cost‑share formula tied to relative Gross National Income and related factors; this is NATO’s long‑standing principle of common funding and burden‑sharing rather than a voluntary per‑project levy ^{[3] [4]}. SIPRI and NATO texts confirm that NSIP shares are negotiated and periodically adjusted and that the Alliance publishes ceilings and planning figures rather than a single, consolidated public spreadsheet of every nation’s annual NSIP euro payments in the materials provided here ^{[5] [6]}.

3. Conflicting signals on the United States’ 2026 contribution illustrate reporting limits

U.S. Department of Defense budget materials state the U.S. FY2026 NSIP budget request is $481.8 million, reflecting Washington’s planned payment and the particularities of U.S. budgeting and cost‑share arrangements ^[7]. By contrast, broader analyses note that under recent re‑apportionments the U.S. share of NATO common funding was reduced from roughly 22% to about 16% of the common funds—an Alliance‑wide percentage that analysts (SIPRI) say applies to common funds overall and may not map cleanly onto a single‑year NSIP figure without the official per‑country cost‑share table ^[5]. Applying 16% to the estimated NSIP ceiling (~EUR 2.35 billion) produces an illustrative U.S. share near EUR 376 million, but that arithmetic is an example only and does not replace an official cost‑share schedule ^{[1] [2] [5]}.

4. Why precise, per‑ally 2026 NSIP euro amounts can’t be stated from the provided reporting

The sources supplied establish ceilings, funding principles, planning figures and national budget requests but do not include an official NATO cost‑share table listing each Alliance member’s 2026 NSIP euro payment; NATO’s public pages explain the formulaic basis (derived from GNI/per‑capita metrics) but the specific percentage or euro figure per Ally for 2026 is not printed in the materials provided here ^{[3] [4] [6]}. Research therefore faces a choice: use the Alliance’s published cost‑share table (not included among the supplied items) or rely on national budget documents (which can differ in presentation and fiscal timing), as illustrated by the U.S. $481.8 million request versus the SIPRI percentage snapshot ^{[7] [5]}.

5. Bottom line and how to get definitive per‑country numbers

Reliable public reporting in these sources supports an estimated NSIP ceiling for 2026 near EUR 2.35 billion (derived from NATO’s EUR 5.3 billion total and NATO’s stated Military and Civil ceilings) ^{[1] [2]}. To convert that ceiling into confirmed per‑ally contributions requires the official NATO cost‑share table or NATO’s published “contributions” schedule for 2026 (the Alliance’s budget office and the Investment Committee maintain and publish those allocations), which are not included in the documents supplied for this briefing ^{[6] [3]}. Note that national budget documents—like the U.S. DoD submission—can give a country’s planned payment ^[7], but a complete, reconciled per‑Ally list for NSIP 2026 is only available from NATO’s detailed cost‑share publication.