They Bought a Joint Annuity at 67 With $400,000 From His 401(k). The $2,100 Check Is Guaranteed for Both Lives, and So Is the Tax on It

A married couple, both age 67, moves $400,000 from his workplace 401(k) into a joint-and-survivor income annuity. The insurer pays $2,100 a month, and the payments continue as long as either spouse is alive. Treat that figure as illustrative. Actual annuity quotes vary by insurer, state, both spouses’ ages and genders, payout option, and prevailing interest rates, and they change frequently. Gather several quotes and check each insurer’s financial strength rating before signing anything.

The rate backdrop matters for context. The 10-year Treasury sits at 4.77% as of September 3, 2026, and the federal funds upper bound is 3.75%. Higher long-term yields let insurers price starting income higher, but the quoted payment is not the Treasury rate and is not guaranteed.

Joint and Survivor: What the Extra Protection Costs

A joint-and-survivor payout is smaller than a single-life payout on the same premium because the insurer expects to pay for two lifetimes instead of one. That reduction is the price of survivor protection, paid every month in lower income. Common variations, in rough order of shrinking checks: life-only (largest payment, nothing after the annuitant dies), life with period certain or cash refund (guarantees a minimum payout to a beneficiary), joint with reduced continuation such as 50% or 75% to the survivor, and full 100% joint and survivor. Every layer of protection lowers the starting check.

Why Every Dollar Is Ordinary Income

Because the premium came from a pre-tax 401(k), there is no exclusion ratio and no tax-free return of principal. Every $2,100 payment is fully ordinary income, taxed at the couple’s marginal rate. A non-qualified annuity bought with after-tax dollars works differently: part of each payment is excluded from income until the basis is recovered, after which payments become fully taxable. Readers routinely conflate the two, and the difference reshapes the after-tax math.

Widow’s Penalty on Three Fronts

This is the piece almost no annuity brochure covers. When one spouse dies, the household generally keeps only the larger of the two Social Security checks. The annuity keeps paying. Income drops modestly. Tax thresholds collapse to roughly half their width. Sequencing the survivor benefit around the remaining annuity income is its own puzzle, and we walked through the math in a free survivor benefits guide.

Federal brackets: the 2025 married filing jointly 22% bracket runs to $206,700; the single 22% bracket ends at $103,350. The standard deduction shifts from $32,200 for joint filers in 2026 to $16,100 for singles.

Medicare IRMAA: The first Part B surcharge tier begins above $218,000 of modified adjusted gross income for joint filers and $109,000 for singles. Above that first tier, standard Part B in 2026 rises from $202.90 to $284.10 per month, with a separate Part D surcharge. Social Security taxation thresholds for singles are also lower than for couples. The survivor can face a higher effective tax rate and higher Medicare premiums on a smaller total income.

Rollover Mechanics and RMDs

Move the funds via direct trustee-to-trustee transfer into an IRA annuity to avoid the mandatory 20% withholding on 401(k) distributions paid to the participant and the 60-day rollover deadline. Workplace plans typically require spousal consent for distributions, and some plans offer an in-plan annuity that may price better or worse than a retail quote. Compare both.

On required minimum distributions, SECURE 2.0 set the beginning age at 73 for those born in 1951 to 1959 and 75 for those born in 1960 or later. A couple who is 67 in 2026 was born around 1959, placing them in the age-73 cohort. Annuitizing inside an IRA generally satisfies the RMD for the annuitized portion and reduces future RMDs on what remains invested.

What is the Case Against? Key Risks to Weigh

• Irreversibility. The $400,000 is gone as a liquid asset.
• Inflation. A level payment loses purchasing power. CPI stands at 332.8 as of July 2026, and the 2027 Social Security COLA is tracking near 3.1%. Social Security adjusts. A level annuity does not. A cost-of-living rider typically cuts starting income by roughly 25% to 30%.
• Insurer credit risk. State guaranty association coverage varies, commonly around $250,000 in present value per contract, which argues for splitting a large premium across two carriers.
• Legacy. A life-only joint contract usually leaves nothing to heirs.
• Product confusion. Plain single-premium income annuities are transparent; indexed and variable annuities marketed to this age group carry heavier fees and sales incentives.

Who This Actually Fits

A couple where one spouse has a thin earnings record and a small Social Security benefit, where family longevity is real, and where enough liquid savings remain outside the contract to absorb a major expense. For that household, the guaranteed paycheck for two lives is worth the smaller check and the permanent tax bill. For everyone else, the widow’s penalty and the loss of liquidity deserve a much longer look than the sales illustration provides.

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