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Rayvt posted...
Let’s assume that the person invested the SS income, and was able to realize a gain of, say, 5% per year. And did so for the 8 years before reaching age 70.

If that person who retired at age 62 had instead delayed taking SS until age 70, how many years would it take for that late-blooming person to catch up to the earlier version of himself/herself that had decided to begin taking SS at age 62?

5.0%? Age 90.8.

6.0%? Never. Not just "they'd have to live longer than anyone has ever lived". Never, as in never ever...the age 62 account grows larger than the 70 account forever.

5.5%? Age 93.6

Here is the URL of this spreadsheet:
Plug in your own numbers for return and COLA to see the crossover age.

Great spreadsheet Rayvt!
I'm not too worried about my overall portfolio if we have 5 or 6% returns, I'd have more of an concern if the market declined 2% or 4% for ten years or so. Of course I hope that's a low probability occurrence.

I added a column for -2% and -4% to the "Quick BE" tab of your spreadsheet for those numbers. For -2%, I get a break even of 78.9 and for -4%, I get 77.7.
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