France-Portugal Treaty of Porto Enters Into Force — Defence, Energy, and Education Ties Deepened

The Treaty of Friendship and Cooperation between France and Portugal entered into force on Sunday 12 April, formalising the most comprehensive bilateral framework ever agreed between the two countries.

Signed in Porto on 28 February 2025 by French President Emmanuel Macron and Prime Minister Luís Montenegro, the treaty covers defence, energy, economics, and education. It is the fourth such bilateral agreement France has ratified with an EU partner, following the Treaty of Aachen with Germany, the Treaty of Quirinale with Italy, and the Treaty of Nancy with Poland.

Defence and Cybersecurity at the Core

The treaty commits both countries to deeper cooperation between their armed forces and defence industries, with specific emphasis on "the protection of critical infrastructures and the fight against hybrid threats" — particularly in cyberspace. The provision comes as both countries grapple with rising cyber incidents across Europe and reflects a broader EU push to bolster collective defence readiness.

Portugal's participation in NATO and France's status as the EU's only nuclear-armed state give the agreement strategic weight that extends beyond the bilateral relationship.

Energy Interconnections and the Iberian Grid

The treaty also commits France and Portugal to developing energy interconnections with the Iberian Peninsula, with the stated aim of "benefiting from European funding on the best possible terms." The commitment gained urgency after the major blackout that struck Spain and Portugal in April 2025, which revived debate about the energy isolation of the Iberian Peninsula from the rest of the European grid.

Portugal currently relies heavily on a single interconnection route through Spain to reach the wider European electricity network. Greater French-Iberian interconnection capacity could reduce this vulnerability, improve energy security, and help Portugal export surplus renewable electricity to northern Europe.

Economic Ties: SMEs and the Blue Economy

On the economic front, the treaty provides for greater support for small and medium-sized enterprises operating across borders and encourages the transition to a "sustainable blue economy" in the Atlantic Ocean. France was Portugal's third-largest trading partner in 2025.

Carlos Pereira, who runs Lusojornal, the leading online media outlet for the Portuguese diaspora in France, told Euronews that the economy is the most significant dimension of the treaty. "Economic relations are already strong: many French companies invest in Portugal, and there is also Portuguese investment in France," he said. "It's a spectacular development: some Portuguese towns are seeing French investment coming in, and, what's new, Portuguese companies are setting up in France."

Education and the Portuguese Diaspora

An estimated 1.7 million Portuguese nationals live in France, making them the third-largest foreign community after Algerians and Moroccans. Between 30,000 and 50,000 French nationals live in Portugal.

The treaty aims to boost the recruitment and training of French and Portuguese language teachers and encourage student mobility. Under a 1973 agreement, Portugal funds and sends around 100 teachers to France to teach Portuguese at primary school level. France takes over responsibility from the collège level onwards.

Pereira, however, expressed scepticism about whether the treaty would meaningfully address the chronic shortage of Portuguese-language teachers in the French system. "France considers that if Portugal does not develop this teaching at primary school level, there is no point in France taking responsibility for it afterwards," he said.

A Bilateral High-Level Meeting Mechanism

Implementation of the treaty's commitments will be overseen by a bilateral High-Level Meeting convened regularly for exchanges between the two governments. President Macron congratulated Portuguese President António José Seguro on his election in February and pledged to "bring the Treaty to life" and work with Lisbon "in the service of the French and the Portuguese, and of a Europe that decides for itself, more competitive, more sovereign, stronger."

What It Means for Expats

For the estimated 1.7 million Portuguese in France and tens of thousands of French residents in Portugal, the treaty could bring practical improvements over time — particularly in mutual recognition of qualifications, student exchange access, and consular services. However, details of specific programmes have yet to be announced, and the treaty's impact on daily life will depend on how aggressively both governments pursue implementation. If you are moving with animals, see our 2026 guide to bringing pets to Portugal.