He Will Switch Contractors to Help Build Eli Lilly’s $6.5 Billion Plant. Two W-2s Could Put $2,821 in Social Security Taxes Back in His Pocket

Picture a pipefitter who spends the first part of 2026 with one construction contractor. Then he moves to a second contractor to work on Eli Lilly (NYSE:LLY | LLY Price Prediction)’s new Houston manufacturing campus. The pharmaceutical giant broke ground on the $6.5 billion site on September 21. The project is expected to create about 4,000 construction jobs, creating an obvious opening for skilled tradespeople moving between contractors.

Our example worker makes $130,000 from his first contractor and $100,000 from the second, for $230,000 in W-2 wages. The move comes with a side effect he may not notice. By December, he will have paid $2,821 more in Social Security tax than the law requires.

He’s far from alone. One taxpayer described getting W-2s from two separate employers and wondering why his tax software flagged excess Social Security. Anyone who switches jobs in a high-earning year can run into the same thing.

Two Payroll Departments, One Annual Cap

Think of Social Security tax as a toll road with a yearly maximum. For 2026, employees pay 6.2% on the first $184,500 of wages, so the most any worker owes for the year is $11,439. Once you pass that ceiling, additional wages are no longer subject to the 6.2% Social Security tax.

The catch is that each employer runs its own toll booth. Neither contractor paid him more than the ceiling, so each one withheld 6.2% on every dollar it paid him.

Take the $11,439 maximum away from $14,260 and you’re left with $2,821. Each payroll department applied the rule correctly to the only wages it could see.

Claiming the $2,821 on His Tax Return

He doesn’t have to call either contractor or ask for a corrected W-2. When two or more employers together withhold more than the annual maximum, the IRS lets him claim the excess as a credit on his federal return, reported on Schedule 3 of Form 1040. The IRS treats it like a tax payment he has already made, so it either lowers what he owes or adds to his refund.

Checking is simple once his W-2s arrive. He adds up the Social Security tax in Box 4 of each form and compares the total with the 2026 maximum. Tax software usually does this for you, but only if every W-2 gets entered.

One difference matters. The credit only covers overwithholding caused by having more than one employer. If a single employer withheld too much by itself, he would generally need to ask that employer to fix it. And his employers keep paying their matching 6.2% with no refund, so the money coming back goes only to him.

Why Extra Withholding Won’t Raise His Future Benefit

Social Security caps his 2026 earnings record at $184,500. The $45,500 he makes above that line adds nothing to his benefit, even though tax was briefly withheld on it. Claiming the refund costs him nothing in retirement.

Medicare works differently and should be handled separately. The regular Medicare tax has no annual wage ceiling, so switching employers doesn’t create a refund there. High earners can also owe an extra Medicare tax once combined wages pass a certain level. When pay is split between two employers, neither one may withhold it, so part of that bill can show up at filing and eat into his credit.

What to Double-Check Before Filing

If you switched employers this year, two habits will protect you:

1. Hold on to every W-2, including the one from the job you left in spring. The overlap only appears when you add both Box 4 amounts together. A missing form means the credit never gets claimed.
2. Plan on getting this money back at tax time, not in your paychecks. The $2,821 won’t show up until he files his 2026 return in 2027. If he budgets around it, the refund feels like a small reward for a good career move.

Your own numbers will depend on details such as your wages, the timing of the switch, and whether any employers are related companies. A few minutes with your W-2s, or with a tax preparer, will tell you whether money is owed back to you.

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