British-born population to be in decline from 2035

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Declining populatio poses a critical threat to the economy and the public finances
Declining populatio poses a critical threat to the economy and the public finances - Dominic Lipinski

Deaths will consistently outnumber births in Britain from the middle of the next decade, according to the Office for Budget Responsibility (OBR), in a tipping point that will leave the country dependent on migration.

The population of people born in Britain is forecast to begin declining in 2035, according to OBR projections published on Thursday. It follows a long-term fall in birth rates.

The UK’s birth rate has fallen from three per woman on average in the 1960s to around two a decade ago and 1.5 in 2022, following a similar pattern to much of the rich world.

The country needs a birth rate of 2.1 births per woman if the population is to remain stable without migration, the OBR said.

Deaths outnumbered births for the first time since 1976 in 2020, a year disrupted by the pandemic, and figures published by the Office for National Statics (ONS) show there were just 400 more births than deaths last year.

The OBR expects a tipping point in the middle of the next decade at which point deaths consistently outnumber births. If net migration fell to zero, the population would start shrinking from 2035 as a result, dropping by 11m by the 2070s.

It poses a critical threat to the economy and the public finances as the drop in births leaves an increasingly elderly population more and more reliant on a smaller share of workers to pay their pensions and cover the cost of healthcare.

While the UK-born population is forecast to be in decline by the middle of the next decade, the OBR does not expect the overall population to fall as strong net migration flows are expected to continue.

The spending watchdog, which made the projections as part of its modelling of public finances, forecast the population will grow from 68m last year to 82m in the 2070s, on the assumption that net migration averages 315,000 people per year.

A net 685,000 people moved to Britain in 2023, down from 764,000 in the previous year but still up considerably higher than the 184,000 who came in 2019.

The previous Conservative Government repeatedly failed to meet its promises to bring down migration levels. Sir Keir Starmer pledged to reduce net migration in the Labour manifesto ahead of July’s election.

Even assuming migration into Britain continues, the declining birth rate means over-65s will account for a growing share of the population while the proportion of children in the UK will shrink.

In 1974, one in four people in Britain were aged under 16. Today one-in-five are children. By 2074, that will fall to 15pc, meaning fewer than one-in-six will be under 16.