I recently retired at age 63 and 9 months. I'm a fairly moderate income person - in the past, my nominal federal income tax rate has run about 10%, but should be a bit lower in the future. The state where I live has a moderate income tax rate.
When I turn 65 in 2011, I will be able to receive a pension based on a defined benefit plan with my last employer. In addition to the vested amount, I have the option to purchase an additional 3 years of service credits (based on my military service). I'm wondering if this is a good idea vs leaving the money in a fixed income producing vehicle. I'm fairly risk-averse. I don't have a need to preserve a large estate, as I have no spouse or children.
The purchase would cost $22,817.90 and would initially increase my monthly income by about $220/month for the rest of my life. Additionally, there is an annual variable COLA that typically runs anywhere from zero to 3% depending on the whim of the state government. The funds would come from a pre-tax IRA, would not be taxed when transfered, and would not be a burden.
I wrote 3 spreadsheets based on earning 1%, 2%, and 3% on this amount, while withdrawing $220/month from my IRA and paying 10% tax on the withdrawal. The "break even" times (when the $22,817.90 is gone) vary from about 8 years/3 months to 9 years.
Does this purchase sound like a good thing to do?