One in four Italians is already 65 or over. South Korea reaches that share in 2033 on our forecast.

Satoria's forecast

Satoria forecast for South Korea: people aged 65 and over in every 100 29.7% of the population in 2035, up from 20.3% in 2025 - could go either way. 80% range 19.3% to 35.7%.

Two lines crossing in 2033.

Satoria's model runs on World Bank and United Nations data, tested on five years it had never seen.

This is the number behind pensions and care.

How many people are 65 and over decides who pays for pensions, who waits for care and how hard it is to hire.

Korea crossed into super-aged last year. Italy did it decades ago.

Statistics Korea reported 20.3% of the country aged 65 or over in 2025. Italy's office counted 25.1%. Neither says when the lines cross.

Korea is 4.8 points behind Italy. When does it pass?

Korea gained 7.0 points in the nine years to 2025. Italy gained 2.8.

Korea's climb needs its birth rate to keep falling.

Nine points in ten years is a steep line, and steep lines have wide ranges.

Three things that will move these lines.

Our year is on the record now. Here is what would move it:

What the official numbers already say

Statistics Korea reported in September 2025 that 20.3% of South Koreans were 65 or over. Italy's statistics office counted 14,821,000 Italians in that age group, 25.1% of the country.

Both offices publish projections, and neither puts the two countries on the same chart, because national statisticians forecast nations, not races.

The gap today is 4.8 percentage points (the plain gap between two percentages). In 2016 it was 8.9: Korea has gained 7.0 points since then and Italy 2.8.

What Satoria's model says happens next

On Satoria's central path South Korea passes Italy in 2033: 28.38% against 28.25%. By 2035 only Japan is older.

Italy is not standing still. It goes from 25.1% to 28.71% in ten years, and gets passed because Korea adds 9.4 points.

Across 51 country series this model was about 82% more accurate than assuming nothing changes. That is the highest reliability we have on any yearly series.

What the number is not

It rises when a country has fewer babies, and in Korea and Italy that is most of the movement, not longer lives.

It says nothing about how healthy those years are, or who is still working at 67. And the honest caveat: Korea's 80% range for 2035 runs from 19.30% to 35.65%.

What it would feel like

The share of over-65s sits under every argument about pensions and care: who waits, and who does the caring. When it moves a point a year, the plan made five years ago is already out of date.

What could change the course

One thing carries this forecast: Korean births staying very low. If they recover, the line flattens and there is no crossing in the 2030s.