Portugal, Estonia, and Sweden were amongst the top 10 countries predicted to have the oldest retirees over the next 3 decades, a new study from Our Life Plan has found.

The study, which tracked expected increases in retirement age over the next 30 years, highlighted longer life expectancy and retirement age trends, and found that Portugal will have the fourth-oldest retirees of any country in the OECD, with the average retirement age in 2050 expected to be 76.

Estonia is expected to have the eighth oldest, with the average retirement age being 71, while it is predicted 70 will be the average age of retirees in Sweden by 2050.

The study found people living in Greece are expected to retire at just 57. Greece was one of the few countries with a decreasing retirement age.

Predictions stated citizens in Greece could, on average, retire at 60 by 2025.

Meanwhile, Poland and France also had low predicted average retirement ages. In 2050, those living in both countries are expected to retire at 61, while those living in Spain and Ireland can expect to retire before 65 in 2050.

As life expectancy continues to rise across the world, state retirement ages tend to mimic this trend.

Our Life Plan founder, Ian Wright, told European Pensions: “According to our research, it is expected that half of OECD European countries will have a life expectancy above 90 years old by 2050, following a growing trend that will keep constant for decades.”

“Some explanations for this are the establishment of a universal health system that works well and high standards of quality of life that have improved the living conditions for European residents,” he added.

Our Life Plan's research reveals that South Koreans are expected to be the oldest workers in 2050, with the average retirement age of the population being nearly 82 years of age.

New Zealanders will be the second oldest members of the OECD when they retire, at 80 years old.

The retirement age for Kiwi’s is predicted to increase by 10 years between 2025 and 2050.

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