The Scary Number, and Why You Shouldn’t Look Away

Greg Bianchi, 52, an engineering project manager in Sacramento, California, pulled up his Social Security statement, saw “$2,800/month at age 67,” and plugged that straight into his retirement-number spreadsheet. He plans to retire at 60. Nobody told him the number on that statement assumes he keeps earning roughly his current salary all the way to 67 — seven years of paychecks that, in his actual plan, don’t exist. “How much do I need to retire?” is the question everyone eventually asks, and almost nobody answers with real numbers, partly because the one number the government actually hands you comes with an asterisk most people never read.

The Investment Growth calculator on this site has a tab built for exactly the account side of this: “My existing accounts.” Enter your 401(k), Traditional IRA, Roth IRA, and taxable brokerage balances — each can grow at a different assumed rate — plus how many years until retirement, and it projects a total, both in nominal dollars and adjusted for inflation into today’s purchasing power.

Example: say you’re 40, planning to retire at 65 — 25 years out — with $120,000 in a 401(k), $40,000 in a Roth IRA, and $60,000 in taxable investments, a total of $220,000 today. Projected individually at a reasonable 7-8% and summed, that can realistically grow to somewhere around $1.3-1.6 million nominal by 65. Adjust that for 3% average inflation over 25 years, though, and the real, today’s-dollars value is closer to $600,000-750,000 — still substantial, but a very different number than the headline figure.

The Social Security number that assumes you don’t retire early

The Social Security Administration is explicit about this, in language most people skim past: the benefit estimate on your statement assumes you continue working and earning roughly your current income every year up until the age shown. If Greg stops earning at 60 instead of 67, the SSA’s formula — based on his highest 35 years of indexed earnings — simply has seven fewer years of contribution at his current salary to average in. Depending on his earnings history, those missing years might replace some genuinely low early-career years and soften the hit, or they might replace nothing and just shrink the average outright. Either way, the “$2,800” on his statement is a projection conditioned on an assumption his own plan violates, not a locked-in guarantee.

That gap between nominal and real is the single most important thing “your number” has to account for on the asset side. A retirement target set in today’s prices without inflating it forward for decades will look comfortable on paper and fall short in practice. On the Social Security side, the equivalent mistake is using the statement’s headline number without checking whether it matches your actual planned retirement age and earnings path — the SSA’s own online calculators let you model a specific stop-work age rather than the default continue-to-full-retirement-age assumption, and the gap between the two can run into hundreds of dollars a month.

Once you see both gaps side by side — nominal versus real on your accounts, and assumed versus actual on Social Security — the combined shortfall is useful information: it’s the signal to raise contributions now or adjust the planned retirement age, not to discover the difference after benefits have already started.

The number-industrial complex

Your “retirement number” is a genuine calculation and a marketing weapon. Advisors inflate it (2% withdrawal assumptions, 3.5% inflation forever) to make the gap terrifying and the AUM relationship urgent; product sellers deflate it (7% withdrawals! annuities solve everything!) to make their solution sufficient. Both are pricing your anxiety, not your retirement.

The boring middle: 25-30 times expected annual spending, tested at a 3.5-4% initial withdrawal with flexibility to cut in bad years. Recompute annually — the number is a dashboard, not a prophecy, and anyone who presents it with certainty and a signature line is selling the certainty.

Run your own numbers, right here

YOU ENTER your current account balances, years to retirement, and the Social Security age and stop-work assumption you’re actually planning for. IT TELLS YOU a real, inflation-adjusted total — the number Greg didn’t have until he stopped trusting the statement’s default assumption and modeled his own.

Frequently asked questions

Does the 4% rule still work?

As a planning anchor with flexibility, yes; as an autopilot, no. Sequence risk is managed by spending cuts in bad markets and a couple of years of cash — not by buying whatever product claims to abolish it.

Social Security changes my number how?

Subtract its (slightly discounted) annual benefit from spending before multiplying — but use the benefit that matches your actual planned stop-work age, not the default statement figure. Ignoring the mismatch, a common blind spot, can overstate your Social Security income and understate your real number by hundreds of thousands over a retirement.

Where do I check my own Social Security estimate against an early-retirement scenario?

The SSA’s online calculators, available through your my Social Security account, let you enter a specific stop-work age and see the recalculated benefit at each claiming age, rather than relying on the statement’s default projection. Running that once, at whatever age you’re actually planning to stop working, replaces a guess with the SSA’s own recalculation.

Does claiming Social Security early make the mismatch worse?

Yes, in a compounding way. Claiming before full retirement age already reduces the monthly benefit on a fixed schedule, and if you’ve also stopped earning before the SSA’s default assumption, that reduction is stacked on top of a benefit that was already recalculated downward from the statement’s headline figure. Modeling both effects together, rather than either one alone, is the only way to see the number you’ll actually receive.

None of this means Social Security or the standard retirement-number math is broken — both are doing exactly what they’re designed to do. What’s broken is treating a projection built on a specific assumption as if it were a promise, when the assumption (continued earnings to a specific age) is precisely the thing an early retirement plan changes. Greg’s fix cost him twenty minutes on the SSA’s own site, once, to replace an asterisked number with his actual one — a cheap trade against building years of a plan around a figure that was never going to arrive.

The same discipline applies to every input in a retirement number, not just Social Security: a pension estimate, a spouse’s benefit, an inheritance assumption, or a home-sale windfall all carry their own quiet asterisks about timing and continued behavior that the headline figure doesn’t spell out. Treating each one as a projection worth re-checking against your actual plan, rather than a fixed input to drop into a formula once and forget, is what turns “your number” from a single scary or reassuring figure into something closer to the truth — recalculated periodically, adjusted as real life diverges from the assumptions baked into it, and never mistaken for a guarantee.

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Source: Social Security Administration, benefit estimate methodology and online calculators, at ssa.gov.

Disclaimer: This article is for general information only and is not financial advice. “Greg Bianchi” is a composite character with invented finances, not a real person. Consult a qualified advisor before making retirement decisions.