The Bill Comes Due at 66
Picture a plumber, call him Ray, who spent three decades running a one-truck operation out of his garage. Weekends were emergencies, weekdays were remodels, and a good chunk of his income arrived in cash and never made it onto the books. On paper, his Schedule C showed a modest living. In reality, he was doing considerably better. It felt like a good bargain at the time: less to the IRS, more in the coffee can.
Now he is 66, his knees are done, and he has just logged into his Social Security account. The estimated monthly benefit is far smaller than he expected. On a recent retirement forum, a tradesman in nearly the same position admitted he had spent years telling himself he would “make it up later” through savings, and later never quite arrived. The earnings Ray kept off the books for 30 years are now showing up as a smaller Social Security check.
Why the Earnings Record Is Everything
Social Security runs on a formula tied to your work history. Your monthly benefit is built from a wage-indexed average of your 35 highest-earning years. The Social Security Administration (SSA) lines up your reported earnings, adjusts older years upward for wage growth, picks your best 35, and averages them. That average is what the benefit formula runs on. Hide income, and you shrink the very number the whole calculation depends on.
For a self-employed worker, the mechanism is direct. W-2 employees have payroll taxes withheld automatically. The self-employed pay Self-Employment Contributions Act (SECA) taxes on their net earnings reported through Schedule SE. Ray dodged a lot of that tax by underreporting, which felt like a win each April. What he was also doing, without noticing, was telling Social Security he barely earned anything for 30 years.
Here is what that looks like in round numbers. Suppose Ray really earned around $70,000 a year in today’s dollars but reported closer to $25,000. For context, median weekly earnings for full-time wage and salary workers were $1,251 in Q2 2026, or roughly $65,000 annualized. Ray’s record makes him look like a part-timer for most of his career. The exact benefit cannot be calculated without his full earnings record and claiming age, but a gap of roughly $1,000 a month is entirely plausible under those assumptions. That shortfall repeats for the rest of his life and can also reduce any survivor benefit eventually paid on his record.
The Damage Compounds With Every COLA
The other silent cost is the cost-of-living adjustment (COLA). Each year, Social Security raises benefits based on inflation measured by the Consumer Price Index for Urban Wage Earners and Clerical Workers. The 2026 COLA came in at 2.8%. That sounds like a fair raise until you notice it is a percentage of whatever base you already have. A 2.8% increase on the higher benefit is meaningfully larger than the same increase on the lower one, and the dollar gap grows with each COLA. The CPI-W rose 3.5% over the 12 months through June 2026, and retirees continue to feel higher prices at the pharmacy, grocery store, and in other basic items.
How It Collides With the Rest of Retirement
The Bureau of Labor Statistics (BLS) puts average annual spending per consumer unit at about $78,535 in 2024. Many retirees spend somewhat less, but not necessarily dramatically less once housing, healthcare, and transportation are accounted for. A smaller Social Security check means Ray has to pull more from savings each year to fill the gap, leaving him with less cushion for a bad market year or a hospital stay.
Waiting to claim can help, but it cannot repair the underlying record. Each year he delays after full retirement age (FRA), up to 70, adds about 8% to his check. It cannot rebuild decades of missing earnings, but even those credits matter when the starting benefit is small.
What Actually Matters From Here
Two variables are worth sitting with before making any claiming decision:
- The earnings record is largely fixed, but the claiming age is not. Ray cannot practically go back and rebuild 30 years of underreported income, although recent errors should still be reviewed. What he can control is when he turns the check on. If he keeps working, even part-time and on the books, new earnings may replace weaker years in his 35-year record. If he delays beyond FRA, he also earns delayed retirement credits until 70.
- Every future COLA builds on his underlying benefit. The check he eventually locks in is the seed that grows, or fails to grow, for the rest of his life. Choosing the highest sustainable starting point is one of the most consequential decisions left on the table. COLAs increase the underlying benefit calculation even when someone delays claiming, so waiting does not mean missing those inflation adjustments.
Ray’s story is specific, but the lesson travels. Social Security quietly keeps score for your entire working life, and the scorecard shows up decades later whether you were watching or not. Anyone in a similar spot should pull their earnings statement, look at the actual numbers, and talk with someone who can model a claiming strategy against their own record. A working spouse, pension, or health issue can shift the right answer in ways a general article never can.
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