Pension Lump Sum vs Annuity: The Complete Analysis

The pension lump sum vs annuity decision swings $100,000–$500,000 of lifetime value depending on longevity, interest rates, survivorship, and investment discipline. Most people get it wrong by reducing it to a single NPV comparison — it's actually a bet on how long you'll live, combined with a question of whether you can beat the annuity's implied yield over 20–30 years of retirement.

The break-even question

The core math is simple: how long do you need to live for the annuity to pay out more than the lump sum would have grown to?

Take a common scenario: a 62-year-old offered a $850,000 lump sum or $4,200/month for life (single-life annuity). The $4,200/month amounts to $50,400 per year. How long does it take to recoup $850,000?

The answer depends on what return you assume on the lump sum if invested:

At a 3% assumed return, the annuity breaks even at age 85. The Social Security Administration's period life table puts the remaining life expectancy for a healthy 62-year-old at roughly 85–87.¹ So at 3%, this is almost exactly a coin flip — the annuity wins if you outlive average expectancy, the lump sum wins if you don't.

At 5%, the break-even is 98. Essentially nobody lives that long. The lump sum wins for nearly any 62-year-old who assumes 5% or better returns.

The calculator on this site lets you run this with your own numbers: Lump Sum vs Annuity Calculator.

The implied yield: what the annuity is actually paying you

There's an elegant shortcut. Think of the annuity as a bond: you give up $850,000 today and receive $50,400/year for life. What's the "yield" on this bond?

The answer depends on your lifespan, but for a healthy 62-year-old expecting to live 25 years (to 87):

• NPV of $50,400/year for 25 years at 3% discount rate: approximately $880,000
• NPV of $50,400/year for 25 years at 4% discount rate: approximately $784,000
• The internal rate of return (IRR) on this 25-year stream starting at $850,000: roughly 3.2%

That 3.2% is the annuity's "yield" at average life expectancy. If you believe you can invest the lump sum and net more than 3.2% per year (after fees, taxes, and behavioral drag) over 25 years, the math favors the lump sum. If you're not confident you can beat 3.2% — or if you're worried about living significantly longer than average — the annuity is the better bet.

What the annuity provides that the math can't fully capture

The break-even analysis above treats the annuity as a financial instrument. But it provides two things that are genuinely hard to put in a spreadsheet:

1. Longevity insurance

The annuity's greatest advantage is that it's the only asset in most retirees' portfolios that pays no matter how long they live. A 62-year-old who lives to 97 collects $50,400/year for 35 years — a total of $1,764,000 — on a $850,000 initial "investment." No investment return assumption achieves that.

Longevity is more uncertain than people assume. Healthy, non-smoking 62-year-olds have a roughly 25% chance of living past 92.¹ If you have a family history of long life, the annuity's tail-risk coverage is worth more than the break-even math shows.

2. Behavioral and management simplicity

The lump sum requires investment decisions over a 20–30 year horizon: asset allocation, rebalancing, withdrawal rate management, and staying the course through bear markets at age 70, 80, and 90. Many retirees who take lump sums spend them faster than their models assumed, or get scared out of equities at a market bottom.

The annuity requires zero management. The check arrives. This isn't a minor point — behavioral economics research consistently shows that retirees spend investment portfolios too fast or too slow, rarely optimally.

How interest rates shape the lump-sum offer

One of the most important — and least understood — aspects of the decision is that the lump-sum offer size itself changes with interest rates. Corporate pension plans use IRS §417(e) segment rates to calculate lump sums.²

The mechanism: the segment rates are used to discount the annuity stream back to a present value. When rates are high, the discount is steeper — the same future annuity payments are worth less in today's dollars — so the lump-sum offer is smaller. When rates are low, lump sums are larger.

• In a low-rate environment (rates near 2–3%): lump sums are generously sized. The break-even return to beat is low, so many retirees take the lump sum.
• In a high-rate environment (rates near 5–6%): lump sums are smaller. The break-even return is also lower (because the lump sum starting point is smaller relative to the annuity). This partially self-adjusts.

Practical implication: if your plan uses a single measurement date and rates are temporarily elevated, delaying your separation date by one measurement window can meaningfully increase the lump sum offer. Conversely, a lump-sum window buyout offered during a low-rate period may be an exceptionally attractive offer you can't get again.

This rate sensitivity is why you cannot directly compare a colleague's 2022 lump sum offer to your 2026 offer — the same pension benefit can produce a lump sum that varies by 15–25% depending on rate environment at measurement.

The survivor election dimension

If you have a spouse, the lump sum vs annuity decision is actually a joint decision with survivorship implications.

Under ERISA §205, a married participant must take a joint-and-survivor (J&S) annuity unless the spouse consents in writing to waive it.³ A J&S annuity reduces the monthly payment — but continues at 50%, 75%, or 100% of that reduced amount after the primary annuitant dies.

Example: $4,200/month single-life vs. $3,700/month 50% J&S vs. $3,400/month 75% J&S vs. $3,100/month 100% J&S. The monthly reduction is the insurance premium for survivor coverage.

The lump sum sidesteps this entirely: you roll it over, invest it, and both spouses benefit from the account during your lifetimes. If you die first, the surviving spouse inherits the IRA. If she dies first, you still own the full account. The lump sum is neutral to mortality order; the annuity is not.

This matters most when:

• There is a large age gap between spouses (younger spouse has more longevity exposure)
• The spouse has limited independent retirement income
• The pension income is a large share of total household retirement income

The Joint-and-Survivor Election Guide and the J&S Calculator walk through these tradeoffs in detail.

PBGC coverage: your downside floor

Private single-employer pension plans are insured by the Pension Benefit Guaranty Corporation (PBGC). For 2026, the maximum guaranteed benefit at age 65 is $7,789.77/month ($93,477/year) for a single-life annuity.⁴ J&S elections reduce this cap proportionally.

PBGC coverage affects the lump sum vs annuity calculus in two ways:

1. If your pension benefit is below the PBGC cap, insolvency risk is largely hedged. The annuity becomes more attractive because the counterparty risk (your employer going bankrupt) is covered.
2. If your pension benefit exceeds the PBGC cap, the portion above $93,477/year is not guaranteed. A corporate bankruptcy could reduce your actual annuity to the cap — making the lump sum attractive as a way to convert the unhedged portion to an asset you control.

Practically: if your annuity from a financially stressed company (auto, airline, retail) is $120,000/year, the top $26,500/year is PBGC-uninsured exposure. Taking the lump sum converts that exposure into a rollover IRA you own outright.

PBGC coverage does not apply to public-sector pensions (federal, state, municipal, military) — those are backed by government taxing authority.

Who should take the lump sum

• Shorter life expectancy. Family history of early mortality, significant health conditions, or SSA actuarial tables suggest you're unlikely to reach the break-even age.
• Strong investment discipline and a long runway. You can manage a $700K–$1M portfolio through market cycles without panic-selling. You have a financial advisor managing the drawdown strategy.
• Large existing retirement savings. The pension is a small fraction of total assets; the lump sum is not "betting the farm" on investment returns.
• Legacy goals. You want to leave meaningful assets to heirs or charity. Annuity payments die with you (and spouse); a lump sum IRA is inheritable.
• Benefit above PBGC cap + financially distressed employer. You can't afford the unhedged insolvency risk.
• High interest-rate environment. If rates are elevated at measurement and you expect them to fall, the lump sum offer may be compressing your decision — consider timing.

Who should take the annuity

• Family history of long life. Both parents lived into their late 80s–90s. Your family pays longevity insurance at actuarial rates; the annuity is cheap for you.
• Limited other retirement savings. The pension is most of your retirement income. Converting it to a lump sum concentrates sequence-of-returns risk where you can least afford it.
• Low risk tolerance or investment anxiety. If the idea of managing a portfolio through a 40% bear market at 75 causes real stress, the annuity buys permanent peace of mind.
• Federal or state pension with COLA. Unlike corporate annuities (fixed-dollar forever), COLAed pensions compound in real value over time. The break-even calculation dramatically undervalues a pension with 2–3% annual inflation adjustment.
• Concern about cognitive decline. The annuity requires no management. A $900K IRA requires ongoing decisions at 80, 85, and 90 that may be compromised.
• Benefit well within PBGC cap, stable employer. Insolvency risk is effectively zero; take the guaranteed income floor.

The hybrid approach: partial lump sum + partial annuity

Many plans allow a split election — take a portion of the lump sum and receive a proportionally reduced annuity. Where available, this is frequently the optimal choice:

• You get a guaranteed income floor from the partial annuity, covering essential expenses
• You retain a growth/legacy asset from the partial lump sum
• If the annuity portion is below the PBGC cap, insolvency risk remains hedged
• You spread the Roth conversion opportunity across both streams

Not all plans offer split elections. Ask your HR benefits administrator explicitly whether a partial lump sum is available and whether it reduces the annuity proportionally or uses a different formula.

Tax considerations (brief)

Lump sum vs annuity is also a tax decision. Taking the lump sum and rolling it directly to a traditional IRA defers all federal income tax until withdrawal. Taking the annuity means steady ordinary income each year — typically at lower marginal rates than a lump-sum cash-out, but taxed every year with no deferral flexibility.

See the Pension Lump Sum Tax Strategies guide for the full analysis, including bracket-targeting Roth conversions, the 20% withholding trap, and state pension exemptions.