Pension Survivor Benefit: Lump Sum vs. Monthly Annuity Calculator

When your late spouse's pension offers you a choice between a one-time lump sum and monthly payments for life, the decision is permanent — once the election window closes, you cannot reverse it. This calculator shows you the break-even age, how long the invested lump sum would last under different return assumptions, and a year-by-year comparison of both options side by side.

What this calculator shows — and what it doesn’t

The calculator solves two questions:

1. Simple break-even age: How old will you be when cumulative annuity payments equal the original lump sum? This ignores investment returns on the lump sum entirely. It’s the baseline answer to “when do I get my money back?”
2. Lump sum depletion age: If you invest the lump sum at your assumed return and withdraw the equivalent monthly payment each month, how long before the fund reaches zero? If the fund never depletes through age 95, the lump sum is the financially stronger option at that return rate.

What the calculator does not model: federal income taxes (both options are generally taxable as ordinary income when received), state taxes, investment fees, sequence-of-returns risk, or the option to roll the lump sum to a traditional IRA and defer taxes entirely.

Factors that favor the monthly annuity

• Longevity. The longer you live, the better the annuity looks. If your parents lived into their 90s and you’re in good health, the annuity’s guaranteed payments are likely to outperform any reasonable investment return.
• You want income certainty. Monthly annuity payments arrive automatically and don’t require investment decisions. For widows already managing new financial complexity, eliminating one variable has real value.
• COLA protection. If the annuity has a cost-of-living adjustment, it hedges against inflation. A fixed payment that felt comfortable at 67 may cover significantly less at 82.
• Pension plan is financially solid. If the plan is from a large government employer or a well-funded private company — and is insured by the PBGC within the guarantee limits — the annuity is effectively risk-free income. See the pension survivor benefits guide for PBGC coverage details and the 2026 guarantee cap.
• Low risk tolerance. If a market downturn early in retirement would force you to sell investments at a loss, locking in guaranteed income avoids that sequence-of-returns problem entirely.

Factors that favor the lump sum

• Shorter life expectancy. If you have a serious health condition or shorter projected lifespan, the annuity may never pay out what the lump sum is worth. A break-even at age 82 means nothing if you don’t expect to reach 82.
• IRA rollover option. Many plans allow you to roll the lump sum directly to a traditional IRA, deferring all taxes until you take withdrawals. This gives you full control over the timing and amount of taxable income — including using the Roth conversion window before RMDs begin. See the Roth conversion guide for widows.
• Estate goals. A monthly annuity typically ends at your death with little or nothing passing to heirs. A lump sum in an IRA can be inherited by your beneficiaries. If leaving assets to children or grandchildren matters, the lump sum preserves that option.
• Pension plan financial risk. If the employer is financially unstable, the pension plan underfunded, or the benefit exceeds PBGC guarantee limits, the lump sum eliminates your exposure to the plan’s solvency risk.
• Other guaranteed income already covers your needs. If your Social Security and other income sources already meet your essential expenses, you don’t need additional guaranteed income — and the lump sum’s flexibility and estate value become more attractive.
• High investment returns are realistic for you. If you have a well-diversified long-term portfolio and the discipline to stay invested, higher returns push the depletion age further out and may mean the lump sum never depletes.

Tax considerations before you decide

Both the monthly annuity and a lump sum taken as cash are taxed as ordinary income. However, a lump sum rolled directly to a traditional IRA (a trustee-to-trustee transfer) defers all taxes until you take withdrawals. This is often the most tax-efficient approach if you don’t need the money immediately. Key points:

• If you instruct the plan to pay you directly (instead of rolling to an IRA), 20% will be withheld for federal taxes automatically — even if you plan to roll it over yourself within 60 days. You would need to make up the 20% out of pocket to avoid it being treated as a taxable distribution.³
• The year your spouse dies, you may still file jointly (MFJ) with lower tax rates and a higher standard deduction. If the pension election window is open in that year, the tax cost of a lump sum taken as income may be lower than in future years as a single filer. See the widow’s tax penalty guide.
• Monthly annuity payments that push your MAGI above the IRMAA thresholds will increase your Medicare Part B premiums each year. An IRA rollover of the lump sum lets you control annual withdrawals to stay below those thresholds.

The election deadline: what to do immediately

Defined-benefit pension plans are required by federal law to provide you with advance notice of your survivor benefit options and the election deadline. That window is limited — check your plan documents or call the plan administrator now to confirm your exact deadline date. Do not assume you have more time than you do.

Before the deadline, you need answers to at least three questions:

1. Is the plan PBGC-insured? If so, your annuity is protected up to the guarantee limit even if the employer fails. If not, the lump sum eliminates solvency risk.
2. What are the IRA rollover mechanics? Confirm whether the plan allows a direct rollover to an IRA and what the transfer process is. Get instructions in writing.
3. What is your full income picture? Add Social Security survivor benefits, any other pension or annuity income, and projected RMDs from inherited retirement accounts to understand whether additional guaranteed income is actually needed or would push you over tax thresholds.

Sources

1. U.S. Department of Labor — Retirement Plans: Survivor Benefits. ERISA requirements for qualified joint-and-survivor annuity (QJSA) elections, advance notice requirements, and surviving spouse rights.
2. Pension Benefit Guaranty Corporation — Maximum Monthly Guarantee Tables. 2026 PBGC maximum guarantee for straight-life annuity at age 65; adjustments for younger ages and joint-and-survivor elections.
3. IRS — Retirement Topics: Tax on Early Distributions. Mandatory 20% withholding on eligible rollover distributions paid directly to taxpayer; direct rollover to IRA avoids withholding entirely.
4. IRS — Retirement Topics: Rollovers of Retirement Plan and IRA Distributions. IRC §402(c) surviving spouse rollover rights; direct rollover rules; 60-day rollover rule.

Calculator uses pure financial math (time-value of money, geometric series) with no hardcoded regulatory values. Tax figures cited in text content are sourced from IRS.gov and CMS.gov; see linked guides for citations. All content verified June 2026.