Most people assume their future Social Security check is set by a formula they cannot influence. In fact, that formula is only as accurate as the earnings history feeding it, and that history is not always right. A year of wages that never got posted to a worker’s record, because of an employer’s payroll mistake, a name change, or a mismatched Social Security number, can lower the benefit the worker eventually collects, often without anyone noticing until it is too late to fix easily.
How lifetime earnings drive the benefit
Social Security calculates a retirement benefit from a worker’s lifetime earnings, specifically the 35 highest-earning years, adjusted for wage growth over time. Every year of covered work that shows up in the record contributes to that average. When a year is missing or understated, the average used to compute the benefit falls, and because the benefit is meant to last for life, even a modest undercount can add up to a meaningful sum over a long retirement.
The stakes are highest for the years a worker earned the most. A missing year of low pay might barely move the calculation, but a missing year during a peak-earning stretch can pull down the 35-year average that determines the monthly payment. Because those top years carry the most weight, an error in one of them does the most damage.
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Where the errors come from
Earnings records go wrong for ordinary, easily overlooked reasons. An employer may report wages under an incorrect Social Security number or misspell a name so the earnings post to the wrong account or none at all. A worker who changed their name after marriage or divorce, and did not update it with Social Security, can end up with earnings scattered across records that do not match. Self-employment income that was not reported correctly, or a company that simply failed to file, can leave a year blank.
None of these mistakes announce themselves. The paycheck was cashed, the taxes were withheld, and life moved on. The gap surfaces only when someone looks at the official record and compares it against what they know they earned, which is why the problem so often goes undetected until a person is close to claiming and the paperwork proving old wages has long since been discarded.
Checking the record before it matters
The defense is simple and free: review the earnings statement regularly. Social Security lets every worker open a personal my Social Security account, which displays the year-by-year earnings the agency has on file along with an estimate of future benefits. Comparing that list against personal records, old W-2 forms, pay stubs, or tax returns, is the only reliable way to catch a year that is missing or wrong.
Financial advisers generally suggest doing this once a year rather than waiting until retirement is near. Reviewing annually means any discrepancy is caught while the supporting documents still exist and the employer may still be reachable, both of which make a correction far easier to push through.
How to fix a wrong or missing year
When a worker spots an error, Social Security can correct it, but the burden is on the individual to prove the correct figure. The strongest evidence is documentation from the year in question, a W-2, a pay stub showing year-to-date earnings, or a tax return filed for that year. With proof in hand, the worker contacts Social Security to request a correction to the earnings record, and the agency updates the account once it verifies the numbers.
Timing matters. There is a general window, running roughly three years, three months, and fifteen days after the year in which the wages were earned, during which corrections are most straightforward. After that window, changes are still possible, but usually only when the worker can supply solid documentation such as tax records. That is another reason not to let questionable years sit: the older the error, the harder the proof becomes.
Why this deserves attention now, not at 66
The practical lesson for older workers is that a benefit statement is not just a projection to glance at, it is a document to audit. A retiree who discovers a missing high-earning year at age 65 may struggle to locate a pay stub from decades earlier, and without proof, the record, and the benefit, may stand as is. The same discovery at 45 or 55 is usually fixable, because the documents are closer at hand.
The cost of ignoring the record is invisible by design. A benefit that is a bit lower than it should be still arrives on schedule; nothing flags it as short. That silence is exactly why the error persists, and why the retirees who protect their checks are the ones who make a habit of checking the underlying earnings while there is still time to correct them. A few minutes spent comparing the official record against personal documents, once a year, is cheap insurance against a permanently smaller payment.
This article was researched and drafted with the assistance of AI and reviewed by The Financial Wire editorial team.
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Warren Cohen is a finance writer based in Phoenix, Arizona, covering personal finance topics including credit, banking, and beginner investing. He earned his degree in business administration from Arizona State University and began his career working in consumer finance, where he gained direct experience with lending and credit systems. He now writes for personal finance websites and fintech platforms, focusing on clear, practical content that helps readers make informed financial decisions.
