In the past two decades, the UK has experienced a steady flow of net migrants into the economy. This net migration has had a wide-ranging impact on UK population, wages, productivity, economic growth and tax revenue. To what extent does net migration benefit the UK economy?


International Migration ONS

  • In 2016, Net long-term international migration was estimated to be +248,000 in 2016. Immigration was estimated to be 588,000 and emigration 339,000.
  • 9,634 people were granted asylum or an alternative form of protection in year ending (YE) March 2017
  • In the past five years, the UK population has been boosted by net migration of around 1,000,000.

Inflows and Outflows


  • In 2011, the top 3 countries for the source of migrants was India, China and Pakistan.
  • The top 3 destinations for people emigrating from the UK was Australia, India and US.

Age Composition of Immigrants


Source: Centre for Economic Studies  – LSE

This shows that immigrant workers are likely to be in the mid-20s and 30s. It is this age group where workers are most flexible and willing to travel to find work. As they near retirement age, immigrant workers are more likely to return to the country of their origin. This age composition has implications for net contribution to tax revenues.

Impact of Net Immigration on UK Economy

1. Increase in Labour Force

Migrants are more likely to be of working age. The majority of migrants come for work or study (students) They may bring dependents, but generally net immigration leads to an increase in the labour force, a decline in the dependency ratioand increases the potential output capacity of the economy.

2. Increase in aggregate demand and Real GDP

Net inflows of people also lead to an increase in aggregate demand. Migrants will increase the total spending within the economy. As well as increasing the supply of labour, there will be an increase in the demand for labour – relating to the increased spending within the economy. Ceteris paribus, net migration should lead to an increase in real GDP. The impact on real GDP per capita is less certain.


In fact, net migration can make economic growth look stronger than it is.  In the period 2005-2015, UK real GDP has increased significantly faster than GDP per head. See: GDP per capita for more info.

3. Labour Market Flexibility

Net migration could create a more flexible labour market. Migrants will be particularly attracted to move to the UK if they feel that there are job vacancies in particular areas. For example, during the mid-2000s, there was a large inflow of workers from Poland and other Eastern European economies – helping to meet the demand for semi-skilled jobs, such as builders and plumbers. The government has also sought to attract migrants from various countries to meet shortfalls in job vacancies in key public sector jobs, such as nursing.

  • In theory, a period of higher unemployment might discourage migrants (this has occurred in the case of Ireland). However, the UK has seen continued net migration despite higher unemployment 2008-12. (though UK labour market was better than Eurozone, so relatively the UK was attractive place for work)

4. Positive impact on the dependency ratio

With an ageing population, the UK is forecast to see an increase in the dependency ratio. However, net migration helps to reduce the dependency ratio. Migrants are a source of working age people, and this helps to reduce the ratio of retired to working people. This has benefits for the government’s budget. If migrants are of working age, they will pay income tax, VAT – but will not be claiming benefits.

5. Impact on particular sectors

An important reason for net migration is higher education. In 2010/11 there were 428,225 international students (link), studying in the UK. These students may not show up in long-term migration trends. But, the short term effects are quite important. The Russell Group of leading universities suggests foreign students contribute £2.5bn a year in fees (link) – helping to finance higher education for domestic students.

Reasons for migration UK – Nov 2014 ONSMigration Report, Table 2

The latest ONS report suggests formal study is the biggest reason for net migration into the UK. See also: reasons for net migration into the UK

6. Social issues

Another issue felt keenly in the UK, is the concept that we are already ‘overcrowded’ In this case, a rapid increase in the population due to migration could lead to falling living standards. For example, the UK faces an acute housing shortage, but also an unwillingness to build on increasingly scarce green belt land. In many cities, it is difficult to build more roads because of limited space. The increased population could increase congestion and urban pollution. Therefore, the increase in real GDP has to be measured against these issues which affect the quality of life.

7. Economies of scale

Others may argue that concepts of ‘overcrowding’ are misplaced. In the nineteenth century, people were already worried about overcrowding. But higher population densities are in one sense more efficient and have a lower environmental impact.  Other countries like Belgium have an even greater population density than the UK. Also, if migrants help to grow the economy, there will be more tax revenue to finance public infrastructure.

8. Welfare benefits

A popular idea is that immigrants are more likely to receive welfare benefits and social housing. The suggestion is that Britain’s generous welfare state provides an incentive for people to come from Eastern Europe and receive housing and welfare benefits. While immigrants can end up receiving benefits and social housing. A report by the University College of London, suggests that :

“EEA immigrants have made a positive fiscal contribution, even during periods when the UK was running budget deficits.
This positive contribution is particularly noticeable for more recent immigrants that arrived since 2000 in particular from EEA countries.” (pdf)
Immigrants who arrived after 1999 were 45% less likely to receive state benefits or tax credits than UK natives in the period 2000-2011, according to the report by Prof Christian Dustmann and Dr Tommaso Frattini from UCL’s Centre for Research and Analysis of Migration.
  • However, despite the positive figures in the decade since the millennium, the study found that between 1995 and 2011, immigrants from non-EEA countries claimed more in benefits than they paid in taxes, mainly because they tended to have more children than native Britons.

In recent years, claiming unemployment benefits in the UK is quite strict – the claimant count measure of unemployment is much less than the labour force survey (see: Unemployment stats). People have to prove they are looking for work. Also, the criteria to be given an immigration visa from non-EU countries is increasingly strict. The migrant often have to show they have a degree of savings or an offer of a good job. (One anecdotal evidence, a friend from New Zealand, couldn’t get a visa to the UK, despite having a job as a computer technician. He certainly wasn’t poor or low skilled.)

The UCL report on immigration suggested that immigrants tend to be more highly skilled than native workers.
  • In 2011, 32% of recent EEA immigrants and 43% of non-EEA immigrants had university degrees, compared with 21% of the British adult population.

Does Immigration Cause Unemployment?


No clear link between migration and unemployment. Net migration occurred with falling unemployment 1991-2005. But, rising unemployment from  2008-12. The fall in unemployment since 2012 may have attracted more migrants coming to work.


A common question people often ask – is whether immigration causes unemployment? Migrants have often been blamed for ‘taking our jobs’ – especially in periods of high unemployment, and in local areas of above average unemployment.

Firstly, net migration is compatible with low unemployment. Net migration helped the US population to increase drastically around the turn of the century, but this didn’t cause unemployment. Migrants bring both increased supply of labour and higher demand for labour. In the 1990s, net migration was consistent with falling unemployment in the UK.

However, in periods of high unemployment, it may be much more difficult for migrants to find work. This may be exacerbated if the migrants have poor English, low skills and or suffer racial discrimination. In this case, net migration could add to the unemployment problem. However, the underlying cause of unemployment is not the net migration, but the recession.

Another factor that determines the impact on unemployment is the skills and qualifications of immigrants. If migrants have low skills, they are more likely to experience structural unemployment. In the 1950s, immigration into the UK from the Carribean was encouraged for manual labour (driving buses e.t.c.) to fill job vacancies. However, when the period of full employment ends, migrants may be more liable to be unemployed, if they lack the skills to find new work.

The impact on unemployment in the current crisis depends on the type and skills of workers who are migrating into the UK.

uk-unemployment-immigrationSource: Centre for Economic Performance, LSE

This shows that the unemployment rate for immigrants tends to be higher than for UK born workers. This gap is especially true during recessions. One reason put forward is that immigrants tend to be more likely to be working on short-term contracts, and so in a downturn are more likely to be laid off.

Does Immigration Push Down Wages?


From one perspective an increase in the labour supply may push down wages. This is especially true if migrants are keen to accept lower wages (e.g. willing to bypass traditional union bargaining). However, again, net migration doesn’t have to push down wages. The massive immigration into the US, during the twentieth century, was consistent with rising real wages. Increased migration, will also affect demand for labour due to higher spending in the economy. Immigration increases labour supply – but also increased labour demand.

However, particular labour markets may notice lower wages if there is a concentration of immigrants willing to work. For example, if wages are high in a particular agricultural market, migration from a low-income country may lead to falling wages in these specific markets.

Also, some migrants may be more vulnerable and more willing to work in the black market (e.g. accept a wage below the equilibrium).

Further reading: Lump of labour fallacy – the fallacy increased labour supply always pushes down wages.

Bank of England study on wages and immigration

A Bank of England found a rise in immigration had a tiny impact on overall wages – with a 10% increase in immigration – wages fall by 0.31%. However, the negative effect was greater for semi/unskilled workers in the service sector, with a 10% rise in immigration reducing wages the equivalent of 2%. B of E report. However, this explains only a small fraction of the real wage decline since 2007.


The impact of net immigration depends on:

  • The skills and qualifications of migrants. The UK is increasingly strict on allowing only skilled workers.
  • How easy do migrant find it to assimilate in the destined country? E.g. in the 1950s and 1960s, migrants from the Indian sub-continent / Carribean may have found it more difficult to find employment due to poor English  / racial discrimination.
  • It depends on the age profile of migrants. If a high % are young workers, then this can help reduce the dependency ratio – a crucial issue for the government budget.
  • It depends on the current economic climate. In a recession, migrants will find it harder to gain employment.
  • It depends on the type and skills of migrants. Migrants from Eastern Europe may be more flexible and return home if the economic situation deteriorates. Low skilled migrants are more likely to be structurally unemployed.
  • Migrants can be a source of foreign income, e.g. tuition fees from foreign students. However, migrants may also send a substantial portion of their earnings to relatives abroad – reducing the wealth of UK.
  • Can the Economy absorb a greater population? For example, what are the impact on public services, levels of congestion, and housing?

Impact of Immigration on housing

Positive net migration levels are a significant factor in increasing the number of households in the UK. Given limited housing supply (and difficulties of increasing supply), this is putting upward pressure on UK house prices and the price of renting.

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