South Korea’s situation is unprecedented in modern history. While Canada and Japan are concerned about a 1.24 TFR, South Korea has been operating in what demographers call "the death zone" for years.
As of early 2026, there is a slight "rebound" in the data, but the structural reality remains staggering.
The Current Stats (2025–2026)
Total Fertility Rate (TFR): Recently ticked up to 0.80 (from a historic low of 0.72 in 2023).
The "Rebound" Context: This is largely attributed to a post-COVID marriage boom and a specific "echo boom" generation (born in the early 90s) hitting their peak childbearing years.
Seoul's TFR: In the capital, the rate remains even lower, recently recorded at approximately 0.63.
How fast is the "Halving"?
Mathematically, a population "halves" when a generation produces only half as many children as itself.
The Generational Math: For a population to remain stable, the TFR must be 2.1.
The South Korea Speed: At a TFR of 0.70, each new generation is roughly one-third the size of the previous one (0.7 / 2.1 = 0.33).
The Result: If the rate stayed at 0.70 without immigration, the youth population would shrink by nearly 70% every 30 years.
The "60-Year Collapse": Experts warn that at these sustained levels, South Korea's total population (currently ~51 million) could be cut in half in just 60 years.
The 2040 Economic "Event Horizon"
While the total population decline is slow (because people are living longer), the working-age population is currently falling off a cliff.
Dependency Ratio: By 2040-2050, South Korea is projected to have the highest dependency ratio in the world.
The 1-to-1 Reality: By the mid-2060s, South Korea is expected to have nearly one retiree for every one worker. This is significantly more aggressive than Canada’s "2-to-1" projection for 2040.
Why South Korea is Different
Unlike Canada, South Korea does not use mass immigration to buffer these numbers. The "halving" is a raw, internal demographic contraction.
Infrastructure Stress: They are already closing hundreds of schools and university departments due to a lack of students.
The "Extinction" Simulator: Some extreme long-term models (extrapolating 0.7 TFR indefinitely) suggest the last South Korean could be born in the year 2400, though social structures usually break or reform long before that.
