Every pension amount this tool shows you is calculated in one specific payment form: your plan's normal form, which is 10 years certain and life. If you compare these numbers against an estimate prepared by the plan's actuary for a different payment form, the amounts will not match — and the payment form is the reason. This article explains what the normal form is, what the alternatives are, and why this tool models only the one.
What "10 years certain and life" means
Your benefit is paid monthly for as long as you live. If you die before receiving 120 monthly payments, the remaining payments in that 10-year window continue to your beneficiary — the SPD's phrasing is that at least 120 monthly payments are made in any event. Live past the 10-year mark and payments simply continue for your lifetime; the "certain" period only matters if you die early in retirement.
The optional forms
At retirement the plan lets you convert the normal form into other shapes of equal actuarial value:
- Life only — payments for your lifetime with nothing guaranteed after; because it drops the 120-payment guarantee, its monthly amount is somewhat higher than the normal form.
- Joint and survivor — a reduced monthly amount while you live, with 100%, 75%, 66⅔%, or 50% continuing to your joint annuitant for their lifetime.
- Social Security leveling — shown on actuary estimates as the "Social Security Option to Age 67" and "to Age 64": a higher benefit until the age you select and a lower one after, designed to smooth total income around the date your Social Security benefit is assumed to begin. Despite the name it is not a Social Security benefit — the estimate's own footnote states the amounts are payable regardless of actual Social Security benefits.
- Partial lump sum — for members who don't enter DROP: 10%, 15%, 20%, or 25% of the benefit's value taken up front, with the remainder paid in any of the forms above.
Why this tool models only the normal form
Converting the normal form into any optional form uses actuarial factors set by the plan's actuary — they depend on assumptions about interest and mortality that the plan adopts, and they are not published in the SPD. Any factor this tool guessed at would produce a number that looks precise and isn't. A calculator whose numbers must be trustworthy has one honest option: model the form whose math the SPD fully specifies, and say so everywhere the numbers appear. That's what the "10 years certain and life" note on your results means.
Getting optional-form numbers
The plan's actuary produces optional-form conversions as part of your retirement processing, and the Board of Trustees can tell you how to request an estimate. An actuary-prepared estimate for, say, a 100% joint-and-survivor election is the authoritative number for that election — this tool's normal-form amount is the starting point that estimate converts from.