Statistic in Intergenerational Report spells challenge for Australia as it ages - ABC News & Headlines – Australian Broadcasting Corporation

Australia is aging faster than was forecast three years ago, accelerating the strain an aging population is expected to put on workers and the federal budget. (Pexels: Matthias Zomer; licence)

For the first time, Australia has a projected date when deaths will outpace births.

Japan, Italy and South Korea have already passed the point where their populations are no longer growing thanks to 'natural increase', and from the 2060s onwards Australia will join them, meaning the population will shrink without ongoing migration.

Australians are getting much older and having fewer babies, with both of these trends accelerating according to the latest Intergenerational Report released today.

By 2066, the median age of an Australian will be 45 compared to 38 and a half today — the population aged over 65 is expected to grow eight times faster than those aged 0 to 20.

The security blanket expected to provide resilience against the budget and workforce pressures that an aging population will cause is continued migration to Australia.

But there is a fierce political contest to cut migration which could up-end that resilience.

There is a statistic used by demographers to work out how much pressure an aging population is putting on the workforce and wider economy, called the Old Age Dependency Ratio.

Basically, it measures how many workers there are for every person aged over 65, the traditional retirement age.

Right now, Australia has an old age dependency ratio of about 29 per cent, meaning there are 29 people aged over 65 for every 100 working-age people.

By 2066, that ratio will rise to about 39 per cent, meaning there will be 39 people aged over 65 for every 100 working-age people.

The obvious conclusion from the Intergenerational Report is that "a smaller share of working-age Australians will need to support a growing number of retirees who are living longer".

It also has implications for the federal budget, which will be more strained by health and aged care demands and more dependent on income tax from workers.

The report shows that people aged over 85 cost as much to the federal budget as what four working-age people contribute — and the number of 85-year-olds is expected to triple over the next 40 years.

It says that burden will increase the risk of higher debt, "passing the cost of spending to future generations", unless new revenue sources are found.

There is expected to be a small offset thanks to more people working later in life, which is expected to grow by 1 per cent, and by more women participating in the workforce.

However an older workforce could also put a drag on productivity, according to the report, making it harder for wages and living standards to grow.

Treasurer Jim Chalmers said the decline in birth rates was one of the biggest changes from three years ago.

But he said while the government expects "fertility rates to fall further and faster", he caveated that Australia would not cross the threshold of more deaths than births until decades later than nations like Japan and South Korea, adding those were "really quite good" economies.

Treasurer Jim Chalmers says one of the biggest changes in the 2026 Intergenerational Report was the downwards revision to birth rates. (ABC News: Ian Cutmore)

The good news, the report says, is that Australia is generally on better footing when it comes to an aging workforce than most other developed economies.

Australia has a relatively young population, and the nation's migration program has helped to "moderate the pace of aging".

The Intergenerational Report says while the workforce in 40 years will be smaller than previously expected due to declining fertility, "unlike many OECD economies, Australia's working-age population is projected to keep growing, supported by skilled migration, providing a source of demographic resilience".

Former home affairs secretary Mike Pezzullo said on Friday that Australia needed roughly 235,000 people per year longer-term in order to prevent major issues caused by an aging population.

"If you don't want to get out of control with that ratio, which places a lot of strain on the budget … you need to have long-term [net overseas migration] of about 235,000 per annum, year after year after year for about 40 years," Mr Pezzullo told News24.

One Nation has proposed deep cuts to Australia's migration program that it says would lead to overall emigration from Australia for three years, before an ongoing annual cap of 130,000 is imposed.

On Thursday the federal government announced measures it would take to create breathing room for housing construction to catch up to population growth — though those measures are only designed to bring migration down to 225,000 by 2028, the rate already forecast by Treasury.

The Coalition has not yet set a migration target, though it says it should be tied to the pace of housing construction.

Mr Pezzullo said there was value in a temporary decline in net overseas migration (NOM) to allow for housing and infrastructure to catch up.

"[But] I wouldn't allow that catch-up to become baked in forever because then we will have those demographic challenges … if we keep NOM suppressed," Mr Pezzullo said.

"If we tank NOM too much, and certainly numbers like 130,000 … if that was sustained for 40 years I would want to ask the Centre for Population in Treasury to give a snapshot: what would the population look like then? What would be the median age of the population?

Mike Pezzullo warned that sustained suppression of Australia's migration program would strain the workforce and the budget. (ABC News: Matt Roberts)

"There's only two choices there: we either have robots with newborn babies et cetera, because we just won't have the workforce … or we are going to have humans to do it. That is really the fundamental question here: do we want a human-centric society, or do we want a shrinking society or an aging society where robots increasingly have to do a lot of that work?"

In Japan, which has the world's highest old-age dependency ratio at about 51 per cent, working ages have been extended, while advanced robotics and artificial intelligence platforms are being used to assist in aged care.

In Italy, which has already reached the old age dependency ratio forecast for Australia in 40 years' time, a shrinking tax base and high social spending has contributed to Italy's massive public debt and led to labour shortages.

The Intergenerational Report says Australia's aging population can be kept in check through skilled migration, employers supporting participation through flexible work and making workplaces more age-inclusive.

It notes research that suggests cash payments to incentivise families to have more children, such as the Howard-era "baby bonus" introduced to slow Australia's aging population, have a limited impact.