Defined Benefit vs. Defined Contribution: What Pre-Retirees With a Pension Need to Decide

Having a pension feels like a gift. The decision of what to do with it is where many people make a mistake they cannot undo.

The lump-sum vs. annuity question gets the most attention, but the pension decision is four decisions stacked on top of each other.

The Lump-Sum vs. Annuity Decision Is Not a Return Question

Most people frame this as: which option pays me more?

If the annuity is $3,200 per month ($38,400 a year) and the lump sum is $620,000, the simple break-even is about 16 years of payments, or around age 81 for someone who starts at 65. Assume any investment growth on the lump sum and the break-even moves later. Average life expectancy at 65 runs into the mid-80s, which is why the annuity often holds up for anyone with average or above-average longevity. But the return comparison misses the more important point.

A pension annuity carries no sequence-of-return risk. If your 401(k) drops 30% in your first year of retirement, the pension check still arrives. That check works as a floor under the rest of the plan. Once essential income is secured, the rest of the portfolio is freed to grow without defensive drag.

The Hidden Tax Consequences Nobody Models Ahead of Time

Pension income is fully taxable as ordinary income, and it counts toward two calculations that can raise your costs in retirement.

Combined income above $44,000 for a married couple means up to 85% of Social Security is taxable. And the Income-Related Monthly Adjustment Amount (IRMAA), the Medicare income-related surcharge, is calculated using income from two years prior. A $3,200 monthly pension adds $38,400 per year to your modified adjusted gross income (MAGI). Stacked on Social Security, required 401(k) distributions, and investment income, that can carry a couple past the first IRMAA threshold (for 2026 premiums, $218,000 of 2024 MAGI for married couples filing jointly) sooner than they expect.

This is the tax side of any serious plan: knowing what your pension does to your tax picture before you elect the payout. Learn more at the Sporos Doctrine.

The Survivor Election Is Often Treated as an Afterthought

A single-life annuity maximizes your monthly check, but income stops at your death. A joint-and-survivor option reduces the monthly amount, often by 10% to 20%, but continues payments to a surviving spouse. This is one of the few retirement decisions you cannot undo.

What Changes When the Pension Pays the Floor

Once the pension covers essential expenses, the 401(k) does not need to behave like a portfolio designed for the worst case. A retiree with $3,200 per month in pension income plus Social Security has a fixed-income equivalent without holding a single bond. Defaulting to a 60/40 allocation without accounting for the pension can leave expected return on the table.

What Changes the Answer

Your health at retirement shifts the pension decision more often than the break-even math does. A retiree who takes the lump sum because the numbers "look close" and then lives to 88 has made a permanent, expensive choice.

If you are within five years of the pension election date and haven't modeled what that income does to your tax rate, your Medicare costs, and your surviving spouse's situation, we can help you model it before the election.

The information provided is for educational purposes only and does not constitute investment, legal, or tax advice. Consult with qualified professionals for guidance specific to your situation.