I'm mid 40s, SS website added up shows my total lifetime earnings at $2.2M and my NW including home equity is about $1.17M, so 53%. However that's with a divorce a few years ago, which was a divide by two event for me. I'll need a few more decades or so to see my NW reaching up near whatever my final earnings works out to be when I FIRE. That said though, I'm planning to FIRE around age 50, which if I live to 85 or so gives me 35 years for market gains and perhaps 18 years of SS income. I guess if I wanted, I could figure out at what age my total income would have exceeded my actual taxed SS earnings, but one way or another it's a lot farther off than my FIRE date.