You Have 12 Months to Fix This $150,000 Social Security Mistake

I’ve been a CPA since 1981, and I spent more than a decade as an investment advisor at major Wall Street firms. In all that time, I’ve watched smart, careful people make one Social Security decision that quietly costs them more than every other financial mistake of their retirement combined.

It’s not market timing. It’s not paying off the mortgage too early. It’s not even the advisor fees so many people obsess over.

It’s the claiming age.

The Social Security Administration sends you a statement that lists your estimated benefit at age 62, at full retirement age, and at 70. Most people glance at it, pick a date, and move on.

For a married couple, that quick decision can leave $150,000 or more on the table over the course of their retirement — and you generally can’t undo it more than 12 months after you file.

Want to see what your own claiming age would do to your spouse’s survivor check? You can model your numbers with a fiduciary advisor, free — there’s no obligation, and you control whether and when you respond to anyone.

The $150,000 Decision Most People Make on Autopilot

Here’s the math the statement doesn’t show you.

When you claim Social Security at 62 instead of waiting, you lock in a benefit roughly 30% smaller than what you’d get at full retirement age. Wait until 70, and your check is about 24% larger than your full-retirement-age amount — which works out to roughly 76% more than the age-62 check.

That difference is permanent. It doesn’t reset.

For a married couple where the higher earner claims early, the cost compounds in two ways. First, the early claimer takes a smaller monthly check for the rest of their life. Second, when that spouse passes, the survivor benefit is based on what the deceased spouse was receiving.

Claim early, and you don’t just reduce your own income — you reduce your spouse’s income for the rest of their life.

Let me make that concrete. Say Bob and Mary are both 62. Bob’s the higher earner — his full-retirement-age benefit is $3,000 a month. He’s been working since he was 19, he’s tired, and he figures he’ll grab his check now and “get what’s mine while I can.” Claiming at 62 locks him in at roughly $2,100 a month — about 30% less, for good.

Here’s what Bob doesn’t see coming. Statistically, Bob’s the one who dies first. And when he does, Mary doesn’t get to keep both checks — she keeps the larger one, which is Bob’s. So Bob’s “get mine now” decision didn’t just shrink his own check.

It quietly set the floor under Mary’s income for the rest of her life.

Had Bob waited until 70, his check — and therefore Mary’s survivor check — would have been about $3,720 a month. The gap between those two choices is $1,620 every single month, and it follows Mary for as long as she lives.

Stretch that across a 15- or 20-year widowhood and you’re well past $150,000 — all from a decision Bob made on a Tuesday afternoon without running the numbers. (Round figures, but the mechanics are exactly how it works.)

For higher earners, the gap is wider. For couples with significant age or longevity differences, wider still.

What Actually Drives the Right Claiming Age

The statement assumes you’ll live to the average life expectancy, that you have no other meaningful income, and that your spouse’s situation looks just like yours. For most people reading this, none of that is true.

The right claiming age for you depends on at least seven factors the statement can’t see:

Your spouse’s earnings history. If one of you has a much higher benefit than the other, the right strategy is usually to delay the higher earner’s claim — because that becomes the survivor benefit.

Your other retirement income. If you have substantial 401(k) or IRA assets, claiming Social Security early to delay tapping those accounts often costs more in lifetime Social Security than it saves in IRA drawdown.

Required minimum distributions. RMDs start at 73 or 75 depending on your birth year. They can push your Social Security benefit into a higher tax bracket and trigger Medicare IRMAA surcharges. The interaction is not intuitive.

Your tax-optimal withdrawal sequence. The order you draw from taxable, tax-deferred, and tax-free accounts during the years between retirement and RMDs is a significant lever — and it’s tied directly to when you claim.

Your longevity. If you reasonably expect to live into your late 80s or 90s — and most healthy 62-year-olds do — delaying is almost always the right financial call. If you have a serious health concern, the math can flip.

Your need for income now. Sometimes claiming early is the right call because the alternative is going back to work or drawing down assets at a bad time. That’s legitimate. But it should be a deliberate choice, not the default.

Your spouse’s longevity. Statistically, the younger spouse will outlive the older one. The claiming decision needs to optimize for two lifetimes, not one.

If two or three of those factors are unfamiliar — or you’ve never seen them modeled against your actual numbers — that’s worth a conversation. You can see your options modeled by a fiduciary advisor, free — no obligation, and you control whether and when anyone hears back from you.

The Three Questions Your Statement Can’t Answer

When I talk with people about Social Security, three questions tend to expose whether they have a plan or just a default:

1. How does your claiming age affect your spouse’s survivor benefit? If you can’t answer this in dollars, you don’t have a plan — you have an estimate.

2. How does your claiming age interact with your RMDs and Medicare IRMAA? Many people are surprised by how much of their Social Security ends up taxed, and by how a Medicare premium surcharge follows from a tax decision they made years earlier.

3. How does your claiming age fit with your withdrawal sequence? If your advisor or your spreadsheet is treating Social Security and your portfolio as two separate plans, the answer is “it doesn’t.”

If those three questions made you pause, you’re in good company — and you’re not behind. The modeling is genuinely hard, and the statement doesn’t prompt you to do it. The people who get this decision right almost always have a second pair of eyes on it.

Want those three questions answered in actual dollars — for your situation? A fiduciary advisor can model your claiming age against your spouse’s survivor benefit, your RMDs and Medicare IRMAA, and your withdrawal sequence — the whole picture, not three separate guesses. There’s no obligation, and you control whether and when you respond to anyone.

Get your numbers modeled, free.

Why a Fiduciary Advisor Is the Right Tool for This Decision

I want to be specific about what “fiduciary” means and why it matters here, because the word gets used loosely.

A fiduciary advisor is legally required to act in your interest — not the interest of a brokerage firm, an insurance company, or a product menu. That distinction matters more on the Social Security claiming decision than on almost any other planning question, because the decision touches Social Security, your IRA, your taxes, and your spouse’s lifetime income all at once.

An advisor paid to sell a specific product has no incentive to optimize across all four. A fiduciary does.

The harder part for most people isn’t deciding they want an advisor — it’s finding a fiduciary advisor whose specialty actually matches their situation. That’s what SmartAsset’s matching service does.

You answer a questionnaire (about 10 minutes, roughly 37 questions covering your age, retirement timeline, assets, income, savings, investment comfort, risk tolerance, health, and family situation, with contact information collected near the end), and they match you with up to three fiduciary advisors who specialize in clients like you.

Nearly all of them offer a free first appointment.

Get your claiming math modeled by up to three fiduciary advisors — free.

More than 2 million people have used this service. A $150,000 decision is worth a careful 10 minutes — and that’s about how long the questionnaire takes. It asks for your contact information toward the end so the advisors can reach out, but you control whether and when you respond to anyone. There’s no obligation, and nearly all of the advisors offer a free first appointment.

Model My Numbers Free

The Bottom Line

The single most expensive Social Security mistake is treating the claiming decision as a calendar question instead of a strategy question. The people who get it right have one thing in common — they don’t make the call alone.

They run the math against their spouse’s situation, their other retirement income, their tax picture, and their longevity expectations. They look at the survivor benefit, not just their own check. And they get a second pair of eyes on it before they file, because you generally can’t reverse a Social Security claim more than 12 months after the fact.

And if you’ve already claimed — even years ago — don’t assume the door is closed. You generally can’t reverse the claim itself after 12 months, but the decisions wrapped around it are still very much in play: your survivor and spousal strategy, the order you draw down your accounts, and how RMDs and Medicare IRMAA land on your tax bill.

Those can still be optimized — and for a lot of couples, that’s where the bigger dollars were hiding all along.

If you’re within five years of claiming — or within five years past it and starting to wonder — the worst move is to do nothing. The second worst is to default into whatever date your statement suggested, without modeling the alternatives.

The match is free. The first appointment usually is too. And a $150,000 decision is worth 10 minutes. See your numbers modeled by a fiduciary, free. There’s no obligation, and you control whether and when you respond to anyone.

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