This topic may be too politically charged for this newsgroup, and I apologize in advance for that. But I know of no other newsgroup where I could get a detailed discussion on this topic.
Back when Social Security reform was the issue du jour, there was a lot of discussion about the "rate of return" from Social Security. Some said it was large, some said it was small (I've seen as low as
1.23%), others said it was negative. So my question is: How do people come up with those numbers?After thinking about it for a while, I realized that this is not an easy question to answer. Since Social Security is paid as an annuity, it all depends on how long you live. If you die before receiving any Social Security benefits, your rate of return is essentially -100%. Unless, of course, your spouse or dependents receive benefits, which complicates matters further. So to simplify matters, I dumbed down the problem, significantly. Here are the parameters I used:
Life Expectancy: 83 (life expectancy of an 18 year old) Annual Salary: $10,712 (minimum wage at 2080 hours per year) Annual SS Tax: $1,035 (9.66%; I subtracted 2.74% for disability insurance) Monthly Benefit: $679
OK, so I drew up a spreadsheet to model this and allowed the interest rate to vary. My goal was to set the interest rate so that the money runs out at age 83. By fidgeting with the interest rate, I determined the rate of return to be 2.71%. My model holds the value of a dollar constant, so that's 2.71% above inflation.
Then I varied the parameters to model someone paying the maximum Social Security tax. Sepcifically, I used salary = 97500 and benefit = 2310. With those values, I came up with a negative rate of return, but only barely negative: -0.12%. Again, that's relative to inflation.
Finally, I decided to see what happens if you live forever (to infinity, and beyond!). In this scenario, I determined the rate of return such that you never run out of money. For the minimum wage worker, I got a rate of return of 4.46%, which is pretty respectable. On the other end of the spectrum, I got 2.8%.
This is a pretty crude model, but I think I got some reasonable numbers out of it. Does anyone else have thoughts on how to estimate Social Security's rate of return?
--Bill