As migration increasingly shapes economic and social life in West Africa, a common language to understand it becomes essential. In Benin, the National Institute of Statistics and Demography (INStaD) sets the benchmarks. Through a series of precise definitions, the institute helps harmonise analysis, read the data better and inform public policy.
Two ideas sit at the base of any analysis: mobility and migration. INStaD defines migration as any movement that changes where someone lives, whether from one commune to another or from one country to another. It therefore implies a lasting move, generally of at least six months.
Within this frame, a migrant is anyone who has left their usual home for at least six months, or who intends to. A non-migrant, by contrast, has never changed residence since birth.
A few categories sharpen the picture. A return migrant is someone who, after living elsewhere for at least six months, comes back to settle in their home area. The ‘other migrant’ covers those who do not fit that return but who have still changed residence.
For a broader view, INStaD introduces lifetime migration, which looks at anyone living somewhere other than their place of birth. This lens reaches past recent moves and takes in a whole life’s path.
Finally, tools such as the migration biography, which traces all of a person’s moves, and migration stages, which count the total number of moves, give a detailed picture of how people move.
Typologies and trends to decode where migration flows
Migration is more than a simple move; it takes forms worth naming. INStaD distinguishes two broad ones.
Internal migration covers moves within Benin, from one commune to another, for at least six months. International migration means crossing a border and settling in another country for the same minimum period.
These moves also break down into flows. Emigration means leaving a given territory; immigration means entering it. The two ideas complement each other and let us measure the human exchange between Benin and the rest of the world.
Migrant remittances form another key piece. The International Monetary Fund (IMF) defines them as the money, goods or capital that migrants send back to their home country. These flows play a crucial role in local economies, supporting families and driving development.
Specific statuses
In Benin, not all migrants share the same status. INStaD sets out several, particularly around work.
A migrant worker earns a living in a country where they are not a national, for at least six months. A seasonal worker, by contrast, stays for a shorter spell, usually under six months, often for farm or temporary work.
The non-resident category covers people present for a limited time: tourists, crew members, diplomats or staff of international organisations.
Finally, some statuses answer situations of vulnerability. Refugees have fled their country because of persecution or grave threats, and they hold international protection. Asylum seekers await a decision on that status.
Language for better action
Behind these definitions lies a major stake: understanding and governing migration. By clarifying the terms, INStaD not only heads off confusion but also produces reliable, comparable data.
Internal and international migration strongly shape the labour market, urbanisation and economic ties, so a solid conceptual frame is indispensable. More than a glossary, these terms give public authorities, researchers and development actors a genuine tool for decision-making.
In Benin, naming migratory realities is already a first step to mastering them.
