Pension Lump Sum vs Monthly Payments Calculator
Your employer is offering a choice: a lump sum now or a monthly pension for life. This calculator turns the pension into one number you can compare: the yearly return it pays you. If you could not earn that much by investing the lump sum, the pension is the better deal. It also shows when the lump sum would run out if you paid yourself the same check.
Use the single-life amount from your pension election packet. If you pick a joint-and-survivor option, use that lower amount.
Most private pensions have no COLA. Many government pensions do.
How to compare a lump sum and a pension
The fairest test is the implied interest rate: the yearly return that would turn the lump sum into the same stream of monthly checks. If that rate is higher than you could safely earn, take the pension. If it is lower, the lump sum may pay more. The rate depends heavily on how long you live, so try a few ages.
Examples
| Offer | Live to | Pension is worth | Lump sum at 5% runs out | Pays more |
|---|---|---|---|---|
| $300,000 or $2,000/mo at 65 | 85 | 5.12% | Age 84 and 8 mo | Pension |
| $300,000 or $2,000/mo at 65 | 90 | 6.36% | Age 84 and 8 mo | Pension |
| $450,000 or $2,500/mo at 62 | 87 | 4.50% | Age 100 and 6 mo | Lump sum |
| $200,000 or $1,100/mo at 65, 2% COLA | 85 | 4.78% | Age 85 and 7 mo | Lump sum |
| $500,000 or $3,200/mo at 60 | 85 | 5.93% | Age 81 and 2 mo | Pension |
Examples use a 5% return on the lump sum (6% in the third row) and pay yourself the same amount as the pension each month.
Reasons to take the monthly pension
- Income for life. It keeps paying no matter how long you live, so you cannot outlive it.
- No investing risk. A market drop does not cut your check.
- Protection. Most private pensions are insured by the Pension Benefit Guaranty Corporation (PBGC) up to a yearly limit if the plan fails.
- Spouse protection. A joint-and-survivor option keeps paying your spouse after you die.
Reasons to take the lump sum
- Poor health or shorter life expectancy. The pension stops at death (unless you chose a survivor option).
- Money for heirs. Whatever is left of a lump sum can go to your family.
- Flexibility. You control when and how much you take.
- Other guaranteed income. If Social Security and other income cover your basic bills, you may be able to take more investment risk.
Taxes on a pension lump sum
Both choices are taxed as ordinary income. A lump sum moved by direct rollover into an IRA is not taxed until you withdraw it. If the plan pays the lump sum to you instead, it must withhold 20% for federal tax, and you may owe a 10% early withdrawal penalty if you are under 59½ (the penalty does not apply from an employer plan if you left the job in or after the year you turned 55).
Also compare when to claim Social Security with the Social Security claiming age calculator, and test your savings with the retirement calculator.
How this calculator works
It counts every monthly pension check from the start age to the age you expect to live to, raising them each year by the COLA you enter. The implied rate is the yearly return at which the present value of those checks equals the lump sum. The run-out age assumes the lump sum earns your expected return and you withdraw the same monthly amount as the pension. Taxes, inflation and survivor benefits are not included. Check the numbers in your election packet before you decide.
FAQ
Is it better to take a pension lump sum or monthly payments?
Compare the return the pension is worth with what you could earn. If the pension is worth more than you can safely earn, monthly payments usually pay more. The pension also cannot run out, which matters if you live long.
How do I calculate the value of a pension?
Find the interest rate at which the monthly payments, up to your life expectancy, add up to the lump sum in today's money. This calculator does that for you.
Is a $300,000 lump sum better than $2,000 a month?
From age 65 to 85, $2,000 a month pays like an investment earning about 5.1% a year. If you cannot reliably earn more than that, the pension is the better deal, and even more so if you live past 85.
How is a pension lump sum taxed?
It is ordinary income. A direct rollover to an IRA avoids tax now. If paid to you, 20% federal tax is withheld, and a 10% penalty may apply if you are under 59 1/2 (or under 55 when you left the job).
Why are pension lump sums lower when interest rates are high?
Plans use current interest rates to convert the monthly pension into a lump sum. Higher rates mean a smaller lump sum for the same monthly benefit.
Rules and rates last checked: October 2026. This is an estimate for general information only, not financial, tax or legal advice. Check IRS.gov or a tax professional before you file.