He Turned Down a $30,000 Part-Time Job to Protect His Social Security. The 35-Year Formula Doesn’t Work That Way.

A 67-year-old turned down $30,000 a year in part-time work to protect a Social Security benefit he may have already misunderstood. The math behind that decision is worth a closer look.

Published August 12, 2026, 7:03am ET · 4 min read

This post may contain links from our sponsors and affiliates, and Flywheel Publishing may receive compensation for actions taken through them.

A male construction worker wearing a yellow hard hat, plaid shirt, and yellow gloves is kneeling on a roof, hammering a dark grey metal piece. The roof shows exposed wood planks and light brown insulation. Green trees and a blue sky with clouds are visible in the background.
A skilled worker meticulously installs roofing, symbolizing the essential and growing opportunities within the trades. This hands-on work represents the 'AI-proof' careers championed by Mike Rowe and Ken Rusk. © welcomia / iStock via Getty Images

The Fear That Keeps a Good Job on the Table

Picture a 67-year-old who spent decades earning around $90,000 a year. A former colleague offers him a $30,000 part-time role, two or three days a week, doing work he enjoys. He turns it down. His reasoning sounds plausible: “If I take a lower-paying job now, it will drag down my average and shrink my Social Security check.”

Versions of this scenario appear repeatedly on retirement forums, usually from people considering consulting work, phased retirement, or a part-time position after leaving a more lucrative career. They worry that one smaller paycheck near the finish line will dilute everything that came before it.

The reassuring part is that Social Security’s formula does not work that way.

Why a Lower-Earning Year Cannot Pull Down a Strong Record

Social Security calculates retirement benefits using a worker’s 35 highest years of indexed earnings. Earnings through age 60 are adjusted for changes in national wage levels. The 35 highest amounts are then added together and divided across 420 months to produce average indexed monthly earnings. The important word is “highest.” A new year enters the calculation only if it exceeds one of the 35 years already being used. If it does not, the new earnings still appear on the worker’s Social Security record, but they remain outside the benefit calculation. They do not replace a stronger year or get blended into the average.

Consider our hypothetical worker. Suppose his record already contains 35 indexed years above $30,000. He accepts the part-time position and earns $30,000 at age 67. Social Security compares that year with the 35 currently producing his benefit. Because the new year does not beat any of them, the calculation remains unchanged. His benefit cannot fall because he earned less than he once did.

The result changes only if the new earnings replace a lower year. Someone with fewer than 35 years of covered work may have zeros in the calculation. Another worker may have several low-earning years from layoffs, illness, or part-time employment. In those cases, the $30,000 year could enter the highest 35 and raise the benefit. Social Security reviews the records of working beneficiaries annually and automatically recalculates benefits when new earnings improve the result. The new wages can help or do nothing. They cannot push a stronger year out of the top 35.

At 67, the Earnings Test Is Gone

A second concern often gets mixed into the first. Social Security’s retirement earnings test can cause benefits to be withheld when someone works before full retirement age (FRA) and earns above the annual limit. That rule ends beginning with the month FRA arrives. At 67, our worker is already beyond it. He can earn $30,000, $80,000, or $100,000 without losing a scheduled Social Security payment to the earnings test.

Someone younger than full retirement age may experience withholding, but that is a separate calculation. At that milestone, Social Security adjusts the benefit to account for months in which checks were withheld. The adjustment arrives through a higher subsequent benefit, not by rewriting the worker’s 35-year earnings average.

What the Part-Time Paycheck Actually Buys

Once the imaginary Social Security penalty disappears, the upside becomes easier to see. Every dollar earned is a dollar that does not need to come from an IRA or brokerage account. The income can let investments remain untouched during a market decline, reduce the size of taxable retirement-account withdrawals, and ease the transition from full-time work into retirement.

The paycheck will still carry Social Security and Medicare taxes. Working after FRA eliminates the earnings test, not FICA. Federal and state income taxes may apply as well. Those are real costs, but a permanently smaller Social Security benefit is not one of them. His Social Security check also continues receiving annual cost-of-living adjustments whether he accepts the job or spends Tuesday afternoons reorganizing the garage.

What to Check Before Saying No

  • Pull the earnings history from a my Social Security account and count the years. If it contains fewer than 35 years of covered earnings, new work replaces a zero. If it contains low years, compare them with the expected part-time salary.
  • Then separate three different questions: whether the wages enter the highest 35, whether the earnings test still applies, and what taxes will come out of the paycheck. They follow different rules.

Turning down meaningful, lower-stress work because of an imaginary benefit reduction is an expensive way to protect nothing. If the job fits his life, the 35-year formula is not a reason to leave it on the table.

Contact [email protected] for any questions or corrections.

Gerelyn Terzo

Gerelyn Terzo is the author of dividend investing handbook "Dividend Investing Strategies: How to Have Your Cake & Eat It Too." A veteran financial journalist, she covers agri-finance for outlets like Global AgInvesting and the broader stock market and personal finance for 24/7 Wall Street. She began at CNBC and later helped launch Fox Business in New York. Gerelyn currently resides in Woodland Park, Colorado and dabbles in nature photography as a hobby.

All articles →