At 67, He Worked 40 Hours on One Bridge Slide. Social Security Kept Paying. His Union Pension Stopped.

Picture a retired ironworker, 67 years old, who hung up the hard hat two years ago and settled into a routine supported by two monthly checks: Social Security and a multiemployer union pension. Then the phone rings. A general contractor needs an experienced hand for one high-stakes bridge replacement. The job will run across four long days and pay $6,000.

He has reached full retirement age (FRA), so he assumes no retirement system cares what he earns anymore. He takes the job and works 40 hours. His Social Security check arrives on schedule. His union pension check does not. One weekend, two rulebooks, and a very expensive assumption.

Why Social Security Kept Paying

Once a worker reaches FRA, Social Security’s retirement earnings test disappears. Wages and self-employment income no longer cause benefits to be withheld, no matter how much the retiree earns. For anyone born in 1960 or later, FRA is 67. In 2026, workers who claim benefits before FRA face a withholding of $1 for every $2 earned above $24,480, and a softer $1-for-every-$3 rule in the year they reach FRA, applied only to months before their birthday. Starting the month FRA arrives, those limits vanish entirely. Our ironworker has crossed that threshold, so the $6,000 bridge job does not interrupt his Social Security retirement benefit. His union pension operates under an entirely separate framework.

Why 40 Hours Can Stop the Pension

A multiemployer pension plan may suspend benefits when a retiree returns to what the plan defines as disqualifying employment. Under federal rules codified at 29 CFR Section 2530.203-3 (implementing ERISA Section 203(a)(3)(B)), after the plan’s normal retirement age the framework generally permits a monthly suspension when a retiree performs at least 40 hours of work in:

• The same industry in which covered employers participate
• The same trade or craft in which the retiree previously worked
• The same geographic area covered by the plan

The bridge assignment checks every box. He returned to construction, performed ironwork, and stayed inside the plan’s territory. Hitting 40 hours in a single calendar month gave the fund grounds to suspend that month’s payment under its plan document and the underlying federal rule.

The precise outcome still depends on what the plan document says. A fund may write more generous terms, define its geographic footprint narrowly, or carve out certain project types. But a retiree cannot assume that reaching Social Security’s FRA also frees him from his pension’s return-to-work rules. The two milestones are set by separate systems and do not move together.

A Good Weekend Can Carry a Hidden Price

Suppose his pension pays $3,200 a month. The $6,000 bridge assignment may still leave him ahead on a before-tax basis, even with one pension payment suspended. The math can work out. The problem is that most retirees in this situation run that calculation after the fact rather than before the job starts.

The surprise grows when the retiree never discloses the work. Many plans require written notice within days of re-employment. Some ironworker funds, for example, require written notification to the trustees within three days of returning to the trade. If the plan paid benefits during a month that should have been suspended, it can seek to recover the overpayment by reducing future payments. The retiree may receive a suspension notice months later and learn that upcoming pension checks will be docked until the balance is cleared.

Putting the Hard Hat Back On

A retiree thinking about returning to his former trade should send the pension fund a written description of the proposed assignment before agreeing to anything. The description should cover four things:

1. The employer and project location
2. The trade or duties he will perform
3. The expected number of hours
4. The calendar month in which the work will occur

Ask the fund for a written determination before accepting. A former coworker’s account of how a similar job was handled is not reliable guidance. Two retirees can do nearly identical work and receive different answers because they belong to different funds, fall under different jurisdictions, or land on opposite sides of the monthly hour threshold.

Also ask when benefits would resume after a suspension, what ongoing reporting the fund requires, and how it recovers any pension payment issued during disqualifying employment. Many funds require a separate written resumption notice, and benefits typically restart no later than the first day of the third month after work stops, provided proper notice was given. The phone call offered $6,000 for four days. It did not mention the $3,200 pension check that was also on the line. Social Security wanted to know whether he had turned 67. The pension fund wanted to know what work he performed, where he performed it, and how many hours showed up on the timecard.

Editor’s note: This update added the 2026 Social Security earnings test thresholds ($24,480 for workers under FRA all year; $65,160 in the year FRA is reached), identified the specific federal regulation governing multiemployer pension suspensions (29 CFR Section 2530.203-3 under ERISA), and incorporated the written three-day notification requirement that many ironworker pension funds impose on retirees who return to the trade.

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