Pension Lump Sum Present Value Calculator
When a pension plan offers you a choice between lifetime monthly payments and a one-time lump sum, comparing them requires converting the payment stream into today's dollars. This calculator computes the present value of an annuity payment stream and compares it against a lump-sum offer, telling you which option is worth more at your assumed investment return rate. It also estimates the break-even discount rate, which is the investment return you would need on the lump sum to match the value of taking the annuity.
Pension present value formula
PV = Annual payment * [1 - (1 + r)^(-n)] / r
where r = annual discount rate, n = years of payments
Better option: Pension PV vs lump sum offer
This is the present value of an ordinary annuity (payments at end of each period). If the present value of the pension stream exceeds the lump sum offer, the annuity has greater actuarial value at your assumed return. If the lump sum exceeds the PV, the lump sum is more generous at that discount rate.
Other factors in the lump sum decision
- Longevity risk: the annuity provides income for life (or a guaranteed period), eliminating the risk of outliving your savings.
- PBGC insurance: defined-benefit pensions are insured by the Pension Benefit Guaranty Corporation (PBGC) up to established limits; check if your plan is covered.
- Investment risk: taking the lump sum transfers investment risk to you; the annuity removes it.
- Survivor benefits: many pensions offer joint-and-survivor options; a lump sum can be invested and inherited. Compare both options including spousal coverage.
- Tax timing: the lump sum is all taxable in one year (unless rolled over to an IRA); annuity payments are taxed as received each year.
Frequently asked questions
What is the present value of a pension lump sum?
The present value is the amount today that is economically equivalent to receiving a series of future pension payments, discounted at a chosen rate. If the lump sum offered by your pension plan equals or exceeds this present value, the lump sum may be worth taking; if it is less, the annuity stream has greater value at your assumed discount rate.
What discount rate should I use to value my pension?
The IRS prescribes specific segment rates (Section 417(e) rates) for plan sponsors valuing pension lump sums. For personal decision-making, use your expected long-term investment return. A 5-7% rate is commonly used for a diversified retirement portfolio. A lower rate makes the annuity more valuable; a higher rate makes the lump sum more attractive.
Does this calculator account for inflation?
Not directly. If you use a real (inflation-adjusted) discount rate and inflation-adjusted payment amounts, the result reflects real value. If you use nominal rates and nominal payments, you get nominal present value. Use consistent assumptions throughout.
How does life expectancy affect the lump sum vs annuity decision?
If you live longer than the payment period used in the calculation, the annuity wins. If you die early, the lump sum (which can be inherited) wins. For a life-only annuity, the break-even point is your expected lifespan. The SSA actuarial life tables provide average life expectancies by age.
What is the break-even discount rate?
The break-even rate is the internal rate of return (IRR) at which the present value of the annuity stream exactly equals the lump sum offer. If you expect to earn more than the break-even rate on the lump sum, you would come out ahead taking the lump sum. If you expect to earn less, the annuity is more valuable.
Official sources
Reviewed by the CalculatorHub team, edited by James Graham, 15 June 2026. See our methodology.