I won't be eligible for SS for a couple of years but am trying to get all of my ducks in a row. I am eligible for a small pension from FIRF (a federal pension). I thought payments from FIRF would decrease SS pmts, so I am considering taking a lump sum distribution (roll into IRA) to avoid having a deduction from SS. I also will be eligible for an even smaller pension from PERA (CO state). I know these payments would decrease SS benefits. I plan to roll the PERA into an IRA shortly. So, I'm a little confused about which "pensions" decrease SS benefits and which ones dont!
1) OK. This thread initially questioned the SS "earnings limit". This involves cases where people have applied for and are receiving SS benefits, but then they return to, or keep, working at a job, and are age 65 or under. In these cases, SS says yes you can do that, but if you earn from the job more than $x (for 2007 I believe the limit is $12,750 or close) and you are under age 66, then for every dollar over the limit, SS benefits will be reduced 50 cents.
I guess the rationale for this reduction is something to the effect of--"if you were just going to keep working, why did you apply for SS benefits as if you were retired".
2) Now, you mention a different scenario. It has nothing to do with earned income limits. Yours has to do with the "Pension Offset" which applies to those who worked a career and earned a pension from employment NOT COVERED by SS. In other words, neither you nor your employer paid SS taxes all those years. Now you get a pension from that employment. And SS feels somehow in order to keep things equal, there needs to be an offset against any SS you get. Because of those "non-SS taxed" jobs that give you pensions. I have never explored the rationale for this Pension Offset.
If you go to SS homepage, they have a note in upperleft of that page about "Pension Offset New Rules". Perhaps if you check that out, it will explain things better.
Or just Google, "Social Security Pension Offset". That is the subject you are interested in.