It's quite significant. Life expectancy is about 82 in France. Retiring at 62 vs 64 means: 1. Years of retirement: -2 2. Years of retirement payments: +2 3. Ye

It's quite significant. Life expectancy is about 82 in France. Retiring at 62 vs 64 means: 1. Years of retirement: -2 2. Years of retirement payments: +2 3. Years of retirement fund returns: +2 (3) is significant because at the end the fund will have about 40 years of payments. Suppose an 8% nominal return for two years on average, this means you're getting about 16% on 40 years of savings, or ±6.5 years of savings, on top of 2 years of extra savings by working two extra years, on top of needing 2 years of fewer pay-outs, meaning the 20 year retirement is cut by 8.5 years, or a -42% decrease. Not to mention side benefits. (ample evidence that working and staying active longer, reduces healthcare costs on society, for example). I'm simplifying the calculations quite a bit of course, but this actually has a massive impact.