Guinea-Bissau is preparing to vote on a new constitution that could fundamentally change how political power is exercised. On 30 August 2026, voters will decide whether to approve constitutional changes that would give the president significantly greater powers, including authority to appoint the prime minister and members of government and to dissolve parliament.
The vote comes less than a year after the military seized power and just months before elections are scheduled for 6 December. This makes a test of whether Guinea-Bissau can break its cycle of political instability without creating a presidency that is too powerful.
Why is Guinea-Bissau changing its political system?
Guinea-Bissau has struggled with political instability since independence from Portugal in 1974, including repeated military interventions and prolonged disputes between presidents, governments and parliament.
The existing system has fuelled repeated disputes between the presidency, government and parliament, making it difficult to govern effectively, a stronger presidency could reduce institutional conflicts and provide greater political stability.
However, giving the presidency more power could weaken the checks and balances designed to protect democratic institutions.
The amendment proposes abandoning the current parliamentary system to adopt a presidential framework. If approved, the president will become the formal head of government (presiding over the Council of Ministers), gain the sole authority to appoint the prime minister and cabinet, and hold the power to dissolve parliament.
Why now?
The military seized power in November 2025, days after a presidential election, overthrowing President Umaro Sissoco Embaló and suspending the electoral process. The junta subsequently established a transitional administration and approved a new constitution in January 2026.
The transition has since come under pressure over political freedoms and the treatment of opposition figures including Domingos Simões Pereira, the country's main opposition leader and former prime minister. He was detained by the military authorities, released earlier this year and later placed in pre-trial detention again in July over allegations linked to attempted coups. He was subsequently permitted to travel to Portugal for medical treatment. His case has become one of the issues surrounding the credibility of the transition.
Who supports the change, and who is against it?
The transitional authorities present the constitutional reform as a way of addressing Guinea-Bissau's longstanding institutional problems. But opposition groups and rights organisations have questioned the process, particularly because the constitution is being put to voters while the country remains under military-led transitional rule.
That creates an unusual democratic dilemma. Whether authorities that came to power through a military takeover can legitimately redesign the political system that elected governments will inherit. Democratic hope here is that voters themselves will have the final say through the referendum.
Why is ECOWAS watching?
The Economic Community of West African States (ECOWAS) has been pressing the transitional authorities to restore constitutional and civilian government. In July, the regional bloc called for the unconditional release of detained political figures, including Simões Pereira, and strengthened its mediation efforts by appointing Senegal as a facilitator.
The African Union has also called for an inclusive and transparent transition and the release of political detainees. The regional concern is straightforward: the referendum and the elections must not simply provide a civilian-looking endpoint to military rule. They need to produce a credible political settlement.
Why does this matter beyond Guinea-Bissau?
Guinea-Bissau's referendum reflects a wider African debate over how to respond to weak institutions, political instability and military intervention. Across West Africa, governments and regional organizations have struggled to balance two competing demands: stability and democratic accountability.
Guinea-Bissau is now attempting a different solution, changing the constitutional balance of power itself. If the reform works, it could be used as a model for resolving institutional deadlock. If it results in excessive concentration of power, it could be seen as another example of democratic institutions being weakened in the name of stability.
What happens next?
30 August 2026:
Voters decide whether to approve the proposed constitutional changes.
6 December 2026:
Presidential and legislative elections are scheduled. The referendum will therefore determine the constitutional framework under which Guinea-Bissau's next political leadership is expected to emerge.
