The $200,000 Social Security Mistake Couples Make at 64 Without Realizing It

The Decision Sitting on the Kitchen Table

You are both 64. One of you earned more over a long career, the other took time off to raise kids or worked in lower-paying roles. You have some savings, your health is decent, and you are tired of working. The temptation is to file for Social Security together, start the checks, and call it done. That single choice, made out of fatigue rather than math, can quietly cost a household six figures.

On retirement forums, a version of this question shows up almost weekly: a couple in their mid-60s asking whether they should just claim now and stop worrying about it. The honest answer is that for most couples with uneven earnings histories, claiming together at 64 is the single most expensive habit in retirement planning. Social Security functions as longevity insurance, a survivor policy, and an inflation-protected annuity rolled into one, and the couple’s claim order is what determines how much of that value the household actually captures.

The One Decision That Drives the Outcome

The factor that matters most here is when the higher earner claims. Everything else is a rounding error by comparison.

Run the numbers with rounded figures. The higher earner has a full retirement age benefit of $3,200 a month at 67. The lower earner is at $1,800 at 67. Claiming at 64 trims each benefit by roughly 13%, because Social Security reduces benefits for every month you claim before full retirement age and adds roughly 8% per year for each year you delay up to age 70.

Strategy A, both claim now at 64: the higher earner gets $2,774, the lower earner gets $1,560, for $4,334 a month combined. Run that to age 85 and the household collects about $1.09 million in lifetime benefits.

Strategy B, lower earner claims at 64, higher earner waits until 70: the lower earner’s $1,560 starts immediately. The higher earner’s check grows to roughly $4,224 a month at 70 after delayed credits and cost-of-living adjustments. From 70 to 85 the household pulls in $5,784 a month. Lifetime total: about $1.15 million.

That is roughly $61,000 more in pure cash. The bigger win is hidden in the survivor benefit. When the higher earner dies, the surviving spouse keeps the larger of the two checks for life. Locking in $4,224 instead of $2,774 can add another six figures to the survivor’s remaining years, pushing the total household advantage to around $200,000.

Bridging the Gap From 64 to 70

The reason couples reject this strategy is usually the cash flow gap, not the math. The higher earner is foregoing six years of checks to get a bigger one later. Something has to fund those years.

For most couples this means a deliberate drawdown of the 401(k) or IRA. Pulling, say, $30,000 to $40,000 a year from tax-deferred accounts between 64 and 70 does two useful things at once. It pays the bills, and it shrinks the balance that will eventually trigger required minimum distributions and higher Medicare premiums later. Think of it as buying the larger Social Security check using your own savings, at a guaranteed return Social Security provides through delayed credits and annual cost-of-living adjustments.

Health matters here. If the higher earner has a serious condition that makes reaching the mid-80s unlikely, the calculus flips and claiming earlier can be the right call. If both spouses are in reasonable shape, the actuarial tables favor the delay because at least one spouse is statistically likely to live well past 85, given that remaining life expectancy at 65 now sits near 20.5 years.

What to Do Before You File

1. Pull both benefit estimates from your my Social Security account, then run them through a claiming optimizer such as Open Social Security or MaxiFi. The output is usually clear: in most uneven-earning couples, delay the higher earner.
2. Map the bridge. Decide which accounts will cover the gap years and what your tax bracket looks like during that window. Coordinating the drawdown with the delay is where households often leave money on the table.

The hardest mistake to undo is filing the higher earner too early. That smaller check follows the surviving spouse for the rest of their life. Health, other income, and family longevity can all shift the answer, so it is worth running your own numbers rather than borrowing a neighbor’s plan.