Pension vs. Lump Sum Calculator
Monthly pension payments provide guaranteed lifetime income. A lump sum gives you control and inheritance potential but requires disciplined investment. This calculator shows the break-even age and which option pays more under your specific assumptions.
Enter your pension amount, lump sum offer, current age, and investment assumptions to see a year-by-year comparison and a break-even analysis.
| Age | Cumulative Pension | Lump Sum Value | Difference |
|---|
How to Decide Between Pension and Lump Sum
The pension-vs-lump-sum decision is one of the most consequential financial choices retirees face — and it's irreversible once made. The math depends on four key variables: the monthly pension amount, the lump sum offer, your life expectancy, and the return you could earn by investing the lump sum.
The implied rate of return on the pension is the discount rate that makes the present value of all monthly pension payments equal to the lump sum offer. If the lump sum is $400,000 and the pension pays $2,500/month for 23 years (age 62–85), the implied pension rate is approximately 5.6%. If you believe you can invest the lump sum and consistently earn more than 5.6% annually — after taxes and fees — the lump sum wins. If not, the pension wins.
When the Pension Is Better
- You expect to live past break-even age. Good health, longevity in your family, and active lifestyle all favor the pension. Average life expectancy at 65 is about 84–87 years (Social Security Administration data), but individual variation is high.
- You aren't confident you'll invest the lump sum consistently. The lump sum math assumes disciplined investing. Spending down the lump sum early dramatically changes the comparison.
- Interest rates are low. When rates are low, pension plan lump sum offers are calculated at a lower discount rate, making pensions relatively more valuable.
- You value predictability over control. The pension removes longevity risk — you can't outlive it. The lump sum could theoretically run out.
When the Lump Sum Is Better
- You have significant health concerns. If your realistic life expectancy is below break-even age, the lump sum passes wealth to your heirs while the pension stops at death.
- You're a disciplined investor with a high return track record. If the implied pension rate is 4% and you consistently earn 7% net, the lump sum grows substantially more.
- Interest rates are high. Lump sum offers are calculated inversely to rates — high rates mean lump sums are discounted more and may be relatively smaller, but that also means invested returns may be higher.
- You have no spouse or dependents to protect. Joint-and-survivor pensions reduce monthly benefits. If you're single with no beneficiaries, the pure lump sum is simpler.
| Investment Return | Break-Even Age | Winner at Age 85 | Advantage |
|---|---|---|---|
| 4% | ~Age 80 | Pension | +$145,000 |
| 6% | ~Age 83 | Pension | +$38,000 |
| 8% | >Age 85 | Lump Sum | +$89,000 |
| 10% | >Age 90 | Lump Sum | +$292,000 |
For income planning in retirement across all sources (Social Security, pension, investments), use the Retirement Income Calculator. To understand how Social Security claiming age affects total lifetime income, see the Social Security Calculator.
Frequently Asked Questions
Should I take the pension or the lump sum?
It depends on your life expectancy, investment discipline, and the implied rate of return on the pension. If the implied pension rate (the return needed to make monthly payments equal the lump sum's value) is lower than what you can realistically earn investing the lump sum, take the lump sum. If you expect to live well past break-even age and value guaranteed income, the pension usually wins.
What is the break-even age?
The break-even age is when the cumulative value of monthly pension payments equals what the lump sum would be worth if invested at your assumed return. If you live past break-even, the pension has paid out more. If you die before it, the lump sum (passed to heirs) was worth more. Break-even ages typically fall between 78–85 for most pension/lump sum comparisons.
What happens if I die before collecting much pension?
With a single-life pension, payments stop at death and your heirs receive nothing from the pension. With a joint-and-survivor option, a surviving spouse continues to receive payments (usually 50%–100% of the original benefit). With a lump sum rolled into an IRA, your estate inherits the remaining balance. Longevity risk (dying early) is one of the strongest arguments for the lump sum.
How is the lump sum offer calculated?
Pension administrators calculate the lump sum as the present value of expected monthly payments discounted at an IRS-specified rate tied to 30-year Treasury yields. When rates are high, the discount rate is high and lump sums are smaller. When rates are low, lump sums are larger. This is why the timing of retirement relative to interest rate cycles matters for this decision.
Can I roll the pension lump sum into an IRA?
Yes. Most defined benefit pension lump sums can be rolled directly into a traditional IRA within 60 days to avoid immediate taxation. From there, the funds grow tax-deferred until withdrawal. You can also convert to a Roth IRA (paying income tax at conversion) for tax-free growth and withdrawals. A direct rollover to the IRA custodian avoids mandatory withholding that applies to cash distributions.
Related Calculators