Hind sight is 20/20. Seems to me it will take about 12 years to break out even. That money you didnt take and thus lost opportunity to invest, i think it will take long past your lifespan to break out even. why did you wait? Im a collect at 62 type person(if i live to 62). Im trying to understand the wait to 70 crowd. Im glad you got a good answer from the local office.
My post was intended to be about the possibility of getting different answers from different staffers. In this case, I'm betting the local person is correct. I'll know for sure when I get my first check.
The "when to start?" question is debated on many threads. In my case, it's significant that my wife will get my increased benefit if I die first, so the actual benefit years will be until the second death, not just until my death.
You mentioned "invest". It's correct that if you want to calculate a breakeven year, you need to make some assumption about investment returns.
Of course, if we did breakeven calculations for auto, home, life, or health insurance, we'd always find that companies pay fewer dollars in benefits then they get in investment-adjusted premiums. On that basis, we'd never buy private insurance. Deferring SS is a little like buying longevity insurance.
For me, deferring is a defensive strategy. As others have said, my heirs will come out with less if I die sooner. I don't care, my goal isn't to maximize my heirs upside potential, but protect me from the downside that could occur in the case the actual investment returns for my retirement years are lousy and I (or my wife) live a long time.
But, it's a very close call. I entirely understand why other people with other health, financial, and personality situations will make the other call. There are lots of valid pros and cons.
I will say there are two arguments I sometimes see that I believe are not valid:
Some say if you take SS early you can spend more in the earlier retirement years. For anyone who accepts something like the 4% guideline (or 3% these days), that is not true. You can actually spend a little more in the early years by delaying SS.
Some say that the roughly 8% annual increase in benefits is like an 8% investment return. It isn't. The 8% increase comes at the cost of losing a year's benefit. The actual IRR depends very much on how long you live, but it is well below 8%.