Pension Lump Sum vs. Monthly Payments: Should You Take the Buyout?

Your former employer has offered you a choice: accept a lump sum payment today — often $200,000–$1,500,000 — or receive monthly pension payments for the rest of your life. It is a one-time, irreversible decision. The wrong answer can cost you $100,000–$500,000 over your lifetime.

The right answer turns on three numbers: the implied return the pension offers (what you'd need to earn on the invested lump sum to match it), your realistic life expectancy, and what happens to your spouse if you die first. The calculator below finds all three for your specific offer.

Pension Lump Sum vs. Annuity Calculator

Enter your specific offer. The calculator shows the pension's implied annualized return (IRR) and how long a lump sum invested at your assumed return would last providing equivalent annual income. For illustration only — not individualized financial or tax advice.

Understanding Your Results

What "pension IRR" means

The pension's implied return (IRR) is the annualized investment return you would need to earn on the lump sum to be exactly as well off as taking the pension for your assumed life expectancy. If your realistic net-of-fee investment return is higher than the pension IRR, the lump sum wins mathematically. If lower, the pension wins.

For pensions using 2026 IRS segment rates (the prescribed calculation method for most private employer pensions), the IRR typically falls between 3.5% and 5.5% — roughly comparable to intermediate bond yields. For pension start ages well below 65, or plans with meaningful COLA provisions, the IRR can exceed 6%.

What "lump sum runs out at age X" means

If you take the lump sum and invest it, then withdraw the pension-equivalent income each year, the portfolio eventually depletes at the age shown. After that age, the pension would still be paying; the lump sum would not. If you live past the depletion age, the pension paid you more lifetime income. If you die before that age, the lump sum left an estate; the pension did not.

Longevity is the central variable

A healthy non-smoking 65-year-old man has roughly a 50% chance of living past age 83; a woman, past age 86 (SSA period life table).¹ For married couples, there is about a 50% probability that at least one spouse survives to age 92. If your family history and health suggest above-average longevity, the pension has a structural advantage — especially for the surviving spouse.

The Survivor Benefit Trade-Off

Pension offers come in several payment forms. The default single-life annuity pays the highest monthly amount but stops entirely when you die. Joint-and-survivor options reduce your payment but continue a portion to your surviving spouse.

*Typical reductions from actuarial equivalence; actual reductions vary by plan and spouse age. Your plan document shows exact amounts.

If you choose the single-life annuity and die early, your spouse receives nothing from the pension going forward. Many financial advisors evaluate whether the lump sum (rolled to an IRA) plus term life insurance offers better total value than the reduced joint-and-survivor pension — particularly when the survivor benefit reduction is large.

PBGC Protection: How Safe Is Your Pension?

Private-sector defined-benefit pensions are insured by the Pension Benefit Guaranty Corporation (PBGC), a federal agency. If your former employer's pension plan terminates, the PBGC takes over and pays benefits up to federal caps.²

For plans that terminate in 2026, the PBGC maximum monthly guarantee for a 65-year-old is $7,789.77 for a single-life annuity and $7,010.79 for a joint-and-50% survivor annuity.² These limits are indexed annually; they were 4.82% higher in 2026 than in 2025. Benefits above these caps are not guaranteed.

If your pension benefit is below these caps — which is most pensions for $1M–$5M earners — PBGC protection means the pension is essentially backed by the federal government, eliminating counterparty risk. If your benefit exceeds these caps, some portion is uninsured company risk.

The lump sum, by contrast, is immediately out of the pension plan and into your IRA — you hold the asset directly, with no dependency on either the company or the PBGC. Many retirees from financially weak employers choose the lump sum specifically to eliminate this uncertainty, even when the pension's implied return is competitive.

Tax Treatment of Both Options

Both the pension annuity and the IRA distributions from a rolled-over lump sum are taxed as ordinary income when received. Neither offers the LTCG rate advantage — there's no tax arbitrage between the two options on an apples-to-apples basis.

If you take the lump sum

• Direct rollover to IRA (recommended): Under IRC §402(c), a direct trustee-to-trustee transfer to a traditional IRA is entirely tax-free. No withholding, no taxes due until you take distributions from the IRA. This is the standard approach.
• Direct distribution (not recommended for most): If the lump sum is paid to you rather than directly to an IRA, the plan must withhold 20% for federal income tax (IRC §3405(c)). You then have 60 days to roll the full amount — including the withheld 20% — into an IRA to avoid taxes and penalties. The withheld 20% is applied to your tax bill but requires you to come up with the difference from other funds to complete the rollover.
• Early distribution penalty: The 10% early distribution penalty (IRC §72(t)) applies if you're under age 59½ — except under the "age-55 rule": if you separated from service in or after the calendar year you turned 55, distributions from that employer's plan are penalty-free. The age-55 rule applies to the plan distribution directly; it does NOT apply to subsequent distributions from an IRA.³

If you take the monthly pension

Each payment is taxable as ordinary income in the year received. Your pension pays annualized income; you'll owe federal (and state, if applicable) income tax each year. This income counts in your MAGI for IRMAA Medicare surcharge calculations — a meaningful factor for retirees with $1M–$5M in assets whose pension pushes them over the $109,000/$218,000 IRMAA threshold.

Decision Framework: When Each Option Wins

What to Do Before You Decide

1. Check the plan's funding status. Your plan administrator must provide an annual funding notice. A plan that's below 80% funded poses greater risk of PBGC involvement and possible benefit reductions. Look up your plan at the PBGC's pension search tool.

2. Get the offer in writing — and understand the deadline. Pension buyout windows are typically open for 60–90 days. The actuarial assumptions driving the lump sum offer are set at the time the window opens; if interest rates change significantly after that, the offer does not adjust. Understand the exact amount and the expiration date before analysis.

3. Consider your Social Security claiming strategy. If you plan to delay Social Security to age 70, you'll need income to bridge the gap. The lump sum provides flexibility to fund the bridge from the IRA; the pension provides the bridge automatically. See the Social Security claiming guide for how these interact.

4. Model the IRMAA impact. A $40,000/year pension + RMDs from a rollover IRA both land in MAGI. Depending on your other income, either option could push you past the $109,000/$218,000 IRMAA tier — but the timing and amount differ between the two options. A fee-only advisor can model the two trajectories.

5. Run the lump sum IRR with a fee-only advisor. The pension decision is complex enough that a flat-fee review from a fee-only advisor — $1,500–$3,000 for a focused analysis — is almost always worth it for a $300,000+ lump sum. The cost of the wrong decision dwarfs the advisory fee.