Net Migration (persons)

What Is the Immigration Rate?

The immigration rate measures the number of permanent immigrants admitted to a country per one thousand members of its existing population over a given period, typically one year. It is the standard way to compare the scale of immigration across countries of different sizes and to track how immigration policy changes translate into actual population inflows over time.

Immigration is distinct from other forms of international mobility. A permanent immigrant is someone who has been granted the legal right to settle in a country on a lasting basis, as opposed to temporary workers, international students, asylum seekers awaiting a decision, or tourists. The precise legal categories vary across jurisdictions, but the common thread is an authorized transition to long-term or permanent residence.

In many advanced economies, immigration has become the primary engine of population growth. As fertility rates have fallen below the replacement level, natural increase — births minus deaths — has slowed or turned negative, leaving net international migration as the main source of demographic expansion. This structural shift has elevated the immigration rate from a niche policy metric to a central variable in labour-market analysis, housing-demand forecasting, and fiscal planning.

The political salience of immigration has grown in parallel with its economic importance. Public attitudes toward immigration shape election outcomes, influence the design of selection systems, and constrain the range of feasible policy options. The immigration rate provides a factual anchor for these debates, grounding them in data rather than perception.

How It Is Calculated

The immigration rate expresses permanent immigrant admissions relative to the existing population:

$r = \frac{I}{P} \times 1{,}000$

where $I$ is the number of permanent immigrants admitted during the year and $P$ is the mid-year population estimate. The result is stated as immigrants per one thousand population.

Permanent versus Temporary Flows

Statistical agencies and immigration departments often report several related but distinct flow measures. The permanent immigration rate counts only those granted permanent residence. A broader measure, sometimes called the total immigration rate, may also include long-term temporary residents such as multi-year work-permit holders and international students. Comparisons across countries require care because definitions of "permanent" and "temporary" differ.

Some countries report a net migration rate that subtracts emigration from immigration:

$r_{\text{net}} = \frac{I - E}{P} \times 1{,}000$

where $E$ is the number of emigrants. This measure captures the overall contribution of international mobility to population change but obscures the gross inflows that are most relevant for understanding labour-market entry, housing demand, and settlement-service needs. The immigration rate discussed here focuses on the gross inflow of permanent settlers.

Data Sources and Timing

Immigration data typically come from administrative records — visa and permit issuance systems — rather than from surveys. This means the figures are generally precise counts rather than estimates, but they may lag by several months because processing times vary. Revisions occur when cases initially recorded in one year are reclassified or when data-quality audits uncover errors.

In some countries, the administrative data are supplemented by border-crossing statistics or by information from population registers that record arrivals and departures. The quality and timeliness of these supplementary sources vary widely, and discrepancies between different data systems are common.

Composition Breakdowns

Beyond the headline rate, most countries publish detailed breakdowns of immigrant admissions by category of entry — economic class, family reunification, humanitarian and refugee, and other streams. They also report the age, education level, language proficiency, and intended occupation of newcomers. These compositional details are essential for understanding the labour-market and fiscal implications of immigration.

How to Read the Numbers

The table below offers a rough guide for interpreting the permanent immigration rate in an advanced economy. The ranges reflect historical norms across OECD countries.

A single year's figure can be misleading. Immigration rates fluctuate with policy changes, global events, and processing backlogs. A surge in one year may reflect the clearance of a pandemic-era backlog rather than a permanent shift in policy ambition. Conversely, a dip may result from administrative delays rather than reduced demand. Multi-year averages provide a more reliable picture of a country's immigration posture.

The composition of the immigrant intake matters as much as the volume. An immigration rate dominated by economic-class admissions — skilled workers selected through points-based or employer-sponsored programmes — has different labour-market implications than one dominated by family reunification or humanitarian streams. Most countries publish detailed breakdowns by admission category, age, education level, and intended occupation.

It is also important to distinguish between the immigration rate and the stock of foreign-born residents. The rate measures annual inflows; the stock reflects the cumulative result of decades of immigration minus emigration and mortality among previous arrivals. Two countries with similar current immigration rates may have very different foreign-born shares depending on their historical trajectories.

Economic Significance

Immigration is a powerful lever for shaping an economy's labour supply. In the short run, an influx of working-age immigrants expands the pool of available workers, easing hiring pressures in sectors facing shortages and moderating wage growth in occupations where newcomers are concentrated. In the long run, immigrants contribute to the tax base, start businesses, and — depending on their age at arrival and their fertility patterns — influence the trajectory of population aging and the sustainability of public pension systems.

The fiscal impact of immigration is a subject of extensive research and considerable debate. Immigrants who arrive young and skilled tend to be net fiscal contributors over their lifetimes, paying more in taxes than they consume in public services. Those who arrive older, less skilled, or through humanitarian channels may initially draw more heavily on settlement services, language training, and income support, though their net fiscal contribution often turns positive over time as they integrate into the labour market.

Housing markets respond rapidly to immigration. Each new permanent resident eventually forms or joins a household, generating demand for rental and owner-occupied housing. When immigration accelerates faster than the housing supply can expand — a process constrained by zoning, construction capacity, and materials costs — the result is upward pressure on shelter costs. This dynamic has become politically salient in several countries where housing affordability has deteriorated alongside rising immigration targets.

Labour-productivity effects depend on the skill composition of the immigrant flow and on how well the receiving economy integrates newcomers. Immigrants who fill high-skill gaps in science, engineering, healthcare, and technology can raise aggregate productivity. Conversely, an influx concentrated in low-wage occupations may dampen measured productivity growth, even as it raises total output and employment. The design of immigration selection systems — points-based, employer-driven, or hybrid — shapes these outcomes.

Central banks monitor immigration trends as part of their assessment of potential output growth. A sustained increase in immigration raises the economy's speed limit, allowing faster GDP growth without generating inflationary pressure. This has implications for the neutral rate of interest and for the pace at which monetary policy should be tightened or loosened.

Entrepreneurship is another channel through which immigration affects the economy. In several advanced economies, immigrants are disproportionately represented among business founders, patent holders, and participants in high-growth sectors. This entrepreneurial energy can boost innovation, create jobs, and contribute to the dynamism of the receiving economy — effects that are not fully captured by the immigration rate alone but are enabled by it.

Related Indicators

• Population Growth — the headline demographic measure that immigration feeds into
• Participation Rate — the share of the working-age population active in the labour market
• Labour Productivity Growth — output per hour worked, influenced by the skill mix of immigrants
• Housing Starts — new residential construction, a key absorption mechanism for population inflows