The data: https://data.oecd.org/healthstat/life-expectancy-at-65.htm https://data.oecd.org/healthstat/life-expectancy-at-65.htm In most well-developed countri

The data: https://data.oecd.org/healthstat/life-expectancy-at-65.htm https://data.oecd.org/healthstat/life-expectancy-at-65.htm In most well-developed countries, life expectancy of women at 65 is around 22 remaining years. I.e. once you have reached the age of 65, on the average you live until the age of 87, give or take a couple of years depending on country. Longest lives in Japan and France. So depending on retirement age, people spend well over 20 years in retirement on average, but as the previous commenter said, many of them will be in retirement for 30 years.