If You Have $620,000 Saved at 67 and a $90,000 Pension Buyout Decision, Here Is the Lump Sum Math

A former employer sends a one-page letter offering two choices: accept a $90,000 lump-sum payment today or continue receiving $720 per month for life. You are 67, single, retired from a manufacturing job, and already have $620,000 saved in a 401(k). With only a few weeks to decide, the choice may look obvious, but picking the wrong option could cost tens of thousands of dollars over the next two decades.

Situations like this come up regularly. In April, financial advisor Wes Moss discussed a nearly identical scenario on The Clark Howard Podcast, helping a caller named Alex evaluate a choice between a $58,000 lump sum and $411 per month in pension payments. Moss applied what he calls the 6% test to gauge whether the annuity offered sufficient value. The same framework applies here, though the dollar amounts are larger and the current rate environment makes the math even sharper.

The situation in one block

• Age and household: 67, single, retired manufacturing worker
• Investable assets: $620,000 in a 401(k), plus Social Security
• The offer: $90,000 lump sum in exchange for waiving a $720/month vested pension ($8,640/year)
• Core tension: guaranteed lifetime income with no inflation protection versus a flexible pool of capital with market risk
• What is at stake: roughly $60,000 to $70,000 of lifetime value, depending on returns and longevity

The payback rate is the whole game

Divide the annual pension by the lump sum: $8,640 divided by $90,000 equals roughly 10%. That ratio tells you how many years it takes for the annuity payments to repay the lump sum’s face value, in this case about ten years. The payback rate is the single most important figure in this decision. A rate above roughly 8% represents a generous offer for a 67-year-old; anything below 6% strongly favors taking the cash.

At 10%, this offer sits in the middle of the range. The employer is essentially telling you that surviving past age 77 or 78 is where the annuity starts to win. According to 2024 data from the CDC’s National Center for Health Statistics, life expectancy at age 65 is about 18.4 additional years for American men and about 20.8 years for women. Adjusting for the two years already lived to reach 67, that places the average breakeven well inside most people’s expected lifespan. On longevity alone, the annuity is defensible.

The return environment complicates that picture considerably. The 10-year Treasury yield has been climbing in August 2026, touching 20-month highs near 4.75% before pulling back to around 4.65%, giving retirees a genuine risk-free alternative for the first time in years. A balanced portfolio can realistically target 5% to 7% nominal returns over a decade. Run the math the employer is hoping you skip: compounding $90,000 at 5% for 20 years produces roughly $238,800, while the annuity delivers $172,800 nominal over the same window, leaving the lump sum ahead by about $66,000. Even at a conservative 3% return assumption, the lump sum still wins by roughly $11,000. Only below about 3% does the annuity come out ahead.

The inflation problem is one most retirees underweight. Core PCE, the Federal Reserve’s preferred inflation gauge, came in at 3.3% year-over-year as of the June 2026 reading, well above the Fed’s 2% target. Private pensions almost never include a cost-of-living adjustment, so that $720 check will buy measurably less each year. Even at a relatively mild 2.5% annual inflation rate, twenty years of erosion cuts real purchasing power by roughly a third. At current inflation rates, the damage arrives faster.

Three paths, ranked honestly

1. Take the lump sum and direct-roll it to an IRA. This is the right call for most people in this exact scenario. With $620,000 already saved and Social Security covering baseline expenses, the $720 monthly check is not needed for day-to-day survival. The lump sum invested at 4% to 5% beats the annuity over a normal lifespan and outpaces inflation. Use a direct trustee-to-trustee rollover so the employer does not withhold 20% for taxes.
2. Keep the pension if guaranteed income is what helps you sleep. If market volatility would lead you to leave the $90,000 sitting in cash earning nothing, the annuity wins by default. As Wes Moss points out, it is hard to guarantee yourself a high single-digit return, and a pension eliminates that uncertainty entirely.
3. Skip any rollover into a commercial annuity. Some advisors suggest purchasing an income annuity inside an IRA with part of the lump sum. At today’s rates, that strategy typically pays out less than the original pension would have. Avoid it.

What to do this week

Request the actuarial assumptions and PBGC interest rates the plan used to calculate the $90,000 offer. If the plan’s discount rate is materially higher than current Treasury yields, the offer is undervaluing your pension and keeping the monthly check makes more sense. Note that the PBGC’s maximum guarantee for a 65-year-old retiree in 2026 is $93,477 per year, so a $720/month pension sits well within protected limits. Confirm your plan’s PBGC insurance status at PBGC.gov, and read IRS Publication 575 before signing any rollover paperwork.

The single most expensive mistake is accepting a check made out to you personally and triggering the mandatory 20% withholding. Make the rollover direct, and confirm the receiving IRA custodian’s wiring instructions before the employer cuts any check. A few phone calls now can preserve thousands of dollars that would otherwise go to taxes prematurely.

Editor’s note: This article has been updated to reflect the August 2026 Treasury bond market context, with the 10-year yield touching 20-month highs near 4.75% before settling around 4.65%; the core PCE figure has been confirmed at 3.3% year-over-year as of the June 2026 BEA release; and the PBGC’s 2026 maximum guarantee of $93,477 per year for a 65-year-old retiree has been added to the action-steps section.

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