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Spanish Prime Minister Pedro Sanchez announced that Spain has formally opted out of a proposed military spending goal that would require members to allocate 5% of their gross domestic product (GDP) to defense by 2035.

Speaking during a nationally televised address, Sanchez described the target as “disproportionate and unnecessary,” reiterating Spain’s commitment to the alliance while drawing a firm line against what he characterized as excessive military expenditure.

“A 5% spending would be disproportionate and unnecessary,” Sanchez said. “We fully respect the legitimate desire of other countries to increase their defense investment, but we are not going to do it.”

A compromise within NATO

The decision comes just days ahead of NATO’s much-anticipated annual summit, where the 32-member alliance is expected to finalize a joint declaration setting out a new 5% target for defense and security-related spending by 2035.

Although the measure has broad backing from member states, particularly those in Eastern Europe and the United States, Spain’s opposition threatened to upend the carefully negotiated consensus.

To avoid derailing the summit, Spain reportedly negotiated an exemption, with NATO leaders agreeing to allow Madrid to remain outside the new spending framework while still participating fully in the alliance’s broader security objectives. Diplomats familiar with the negotiations said the exemption was granted after intense backchannel communications and diplomatic outreach in recent days.

A key element was a letter sent by Sanchez to NATO Secretary General Mark Rutte on Thursday, in which he formally communicated Spain’s decision to opt out of the 5% pledge. While the letter raised alarm bells about the unity of the alliance ahead of the summit, the outcome appears to have resolved potential tensions, at least for now.

Spain’s current military spending and commitment to NATO

At present, Spain spends approximately 1.28% of its GDP on defense, the lowest ratio among NATO’s member states, according to the alliance’s most recent estimates. This places Spain well below the existing NATO benchmark of 2%, which all members agreed to pursue following Russia’s annexation of Crimea in 2014.

In April of this year, Sanchez pledged to accelerate Spain’s path toward meeting the 2% threshold, a target that is still viewed as the official baseline for NATO members despite the emerging 5% goal. The Spanish government has announced new investments in defense infrastructure, cybersecurity, and personnel in recent months, arguing that it can meet all its operational commitments to NATO at 2.1% of GDP.

“We are not underperforming,” Sanchez asserted in his address. “Spain contributes significantly through troops, equipment, intelligence, and strategic capabilities. We can, and will, continue to meet our alliance obligations without succumbing to inflated military spending.”

Rising pressure for military investment across NATO

The push for increased defense budgets comes amid a shifting global security landscape, particularly in the wake of Russia’s expanded war in Ukraine and rising tensions in the Indo-Pacific. Washington and key European capitals have been urging NATO partners to not only meet existing commitments but to prepare for what U.S. defense officials describe as a “long-term strategic contest” against authoritarian powers.

Earlier this month, U.S. President Donald Trump reaffirmed his administration’s stance that all NATO allies must “pay their fair share” and “prioritize collective security in a dangerous world.” Sources in Brussels say the new 5% figure is not intended as a binding requirement but as a political signal to adversaries that NATO intends to remain robust, capable, and unified.

Nonetheless, many analysts argue that such an ambitious target may be economically unsustainable or politically untenable for smaller or fiscally constrained members.

Political implications

Sanchez’s resistance to the 5% spending target is not just a matter of budget priorities but also reflects Spain’s domestic political climate. The Spanish public has historically been skeptical of large increases in military spending, particularly during times of economic uncertainty and growing demands for investment in health care, education, and green energy.

By taking a principled stand against what he views as excessive militarization, Sanchez appears to be shoring up his progressive credentials at home while maintaining Spain’s commitment to international obligations.

Analysts also note that Sanchez’s position may resonate with other southern European countries that face similar budgetary constraints and public opposition to military expansion. Although no other NATO members have formally sought an exemption from the 5% goal, Spain’s successful opt-out may set a precedent for future negotiations.

NATO unity holds, but fractures remain

The episode underscores the delicate balance NATO must strike between strategic ambition and internal cohesion. While the alliance appears to have weathered Spain’s pushback without triggering a larger crisis, questions remain about the practicality of the 5% target and whether it reflects a shared vision among all member states.

Spain’s opt-out may be seen as a pragmatic solution that allows NATO to move forward with a strong, if not unanimous, endorsement of its long-term strategic vision. It also highlights the evolving nature of burden-sharing within the alliance, one that recognizes both financial realities and diverse national priorities.

As the NATO summit approaches, Spain’s stand against the 5% GDP defense spending goal offers a nuanced counterpoint to the prevailing hawkish momentum within the alliance. While many nations prepare to ramp up military investments, Spain is signaling that strategic commitment does not necessarily require outsized budgets.