Pension Buyout: Lump Sum vs. Annuity and the Break-Even Calculation

One Offer, One Decision, No Undo

Pension buyout windows arrive with a deadline. The employer — often facing the pressure of rising pension obligations on its balance sheet — offers workers or former workers a choice: accept a lump-sum payment now and walk away, or retain the original annuity and receive monthly income for life. Once accepted or declined, the choice is typically permanent. The lump-sum offer always looks large in absolute terms — six figures or seven — and the annuity always looks modest. The decision requires translating those two numbers into a common unit of comparison, and that translation is where most people go wrong.

The Break-Even Calculation

The basic break-even calculation converts the annuity into a present value and compares it to the lump sum. If the lump sum offered is $300,000 and the annuity pays $2,000 per month ($24,000 per year), the question is: what investment return does the lump sum need to earn to generate $24,000 per year in perpetuity — or for a specific survival horizon? Using a simple perpetuity formula, the implied discount rate is $24,000 / $300,000 = 8.0%. If the participant believes they can reliably earn more than 8% on the lump sum invested, the lump sum wins financially. If they expect to earn less, the annuity wins. The problem: pension discount rates set by the IRS (which employers use to calculate lump-sum offers) are based on corporate bond yields that fluctuate significantly over time. When interest rates rise, lump sums fall. When rates fall, lump sums increase.

PBGC Insurance: The Safety Net and Its Limits

The Pension Benefit Guaranty Corporation (PBGC) insures defined benefit pension benefits if the sponsoring employer becomes insolvent. In 2024, the maximum PBGC guarantee for a single-employer pension plan is $7,107.95 per month — $85,295.40 per year — for a worker who retires at age 65. This is not an unlimited backstop. Benefits above that threshold are uninsured. A long-tenured executive or union worker at a company like a major airline, steel manufacturer, or retailer that later entered bankruptcy might receive only a fraction of their expected pension if the plan is underfunded and their benefit exceeds the PBGC maximum. The PBGC guarantee also adjusts for retirement age: workers who retire before 65 receive lower guaranteed maximums. Workers with joint-and-survivor annuity benefits see their guarantee prorated accordingly.

• The PBGC covers single-employer plans; multi-employer (union) plan guarantees are significantly lower — approximately $12,870/year in 2024.
• PBGC does not cover governmental pension plans or church plans.
• The PBGC has periodically faced solvency concerns of its own; its multi-employer fund received a $90 billion infusion from the American Rescue Plan Act of 2021.
• If a plan sponsor is in financial distress, a lump-sum offer that keeps the obligation off the employer's books may be strategically timed — take the offer before the sponsor deteriorates further.

The Spousal Annuity Cost

Federal pension law (ERISA) requires that the default form of payment for a married participant receiving a pension be a joint-and-survivor annuity — one that continues paying a percentage (typically 50% or 75%) of the original benefit to the surviving spouse after the participant dies. Electing the single-life annuity pays more per month but leaves the surviving spouse with nothing. Electing the joint-and-survivor annuity costs the participant a monthly reduction — often 10%–20% of the single-life benefit — to fund the survivor coverage. This reduction is effectively an insurance premium paid throughout the participant's lifetime. The cost is real: a $2,000 single-life benefit might become a $1,700 joint-and-50% benefit, a $330/month premium for the survivor protection.

• The spouse must consent in writing to waive the joint-and-survivor annuity if the participant elects single life.
• If the participant has a large IRA, 401(k), or life insurance policy providing survivor income, the single-life annuity may be defensible even for married couples.
• Some pensions offer a "pop-up" feature: if the spouse predeceases the participant, the monthly payment reverts to the higher single-life amount.

The Longevity Bet and Health Factors

Pension annuities are insurance against living too long. The longer a participant lives, the more total income the annuity delivers. The shorter the lifespan, the more the lump sum would have been worth. This makes personal health — not just actuarial tables — a critical input. A 62-year-old participant with a cancer diagnosis should weight the lump sum far more heavily than general population tables suggest. A participant whose parents lived into their 90s with no major illness should weight the annuity more heavily. Life expectancy data from the Social Security Administration shows that a 65-year-old man today has a 50% probability of surviving to age 84 and a 25% probability of surviving to age 92. For a married couple both aged 65, there is a 50% probability that at least one partner survives to age 91.

Tax Implications of the Lump Sum

A pension lump sum rolled directly to a traditional IRA within 60 days avoids immediate federal income tax — the entire amount continues to grow tax-deferred. Failure to execute a direct rollover triggers immediate ordinary income tax on the full amount, plus potential 20% mandatory withholding. A $400,000 pension lump sum taken as cash could generate $140,000+ in federal income tax in a single year, pushing the recipient into the highest bracket. The lump sum is also not subject to the 10% early withdrawal penalty if the participant separates from service in or after the year they turn 55 — an exception that does not apply to IRA distributions, which retain the 59½ penalty boundary. Rolling a pension lump sum to an IRA inadvertently eliminates this 55-and-separated exception for that money.

This article is for informational purposes only and does not constitute financial or tax advice.