The Trade War Cut His Auto-Plant Week to Three Days. Social Security Counted His Wages and Ignored the Check That Filled the Gap

A Michigan auto worker in his mid sixties opens two envelopes in the same week. One is a payroll stub for three shifts. The other is a state check covering part of the two days his plant went dark. To him it looks like one paycheck split in two. To Social Security, only half of it exists.

That is the strange math facing older workers whose employers are using Michigan’s Work Share program to trim hours instead of the alternative: handing out pink slips. Cross-border tariff pressure has squeezed automakers and suppliers across the state, and Governor Gretchen Whitmer argued in a Wall Street Journal opinion piece that tariffs are hurting the state.

The national jobs picture still looks calm on paper, with unemployment at 4.1% in August 2026 and initial claims sitting at 206,000 for the week ending September 5. Smaller schedules do not show up in those numbers, but they do in household budgets. One online forum post from a Metro Detroit worker captured the mood: he described feeling relieved to keep his job, then confused when his Social Security statement suggested his part-time state check might still cost him benefits.

Why One Check Counts and the Other Does Not

Take a 64-year-old who was earning about $1,000 a week on a full five-day schedule. His plant moves to a three-day week under Work Share, so his direct wages drop to roughly $600. Michigan then pays him a Work Share benefit tied to the 40% cut in his schedule, worth up to about $212 a week. His total take-home is close to what it used to be, but the two pieces are treated very differently once Social Security looks at them.

Social Security’s retirement earnings test only counts wages and net self-employment income. The agency’s own handbook, in Section 1812, expressly excludes unemployment compensation, and Work Share benefits fall under that umbrella. So across a 52-week stretch, Social Security sees $31,200 in wages, not the roughly $42,224 he actually received.

That distinction matters because of the 2026 earnings limit. For someone under full retirement age (FRA) all year, Social Security withholds $1 in benefits for every $2 earned above $24,480. His wages alone clear that line by several thousand dollars, so part of his monthly check is held back. If the state payment counted too, more would be withheld. Because it does not, the very program keeping him whole on income is invisible to the earnings test.

How the Pieces Fit Together

Two boundaries are worth knowing before this becomes a headache at tax time.

1. Withheld benefits are not gone. Once he reaches full retirement age, the earnings test disappears entirely, and Social Security recalculates his monthly benefit upward to credit him for the months that were withheld. It is a delay, not a forfeiture.
2. Work Share checks are still federally taxable. The earnings test ignores them, but the IRS does not. That can nudge more of his Social Security benefit into taxable territory, especially if a spouse is still working or a pension is in the mix.

The COLA adds one more moving piece. The 2027 cost-of-living adjustment is currently tracking toward 3.3%, with two of the three Q3 months in. The COLA affects his monthly benefit, while Social Security sets a new earnings limit annually. That fresh threshold, not the COLA itself, will determine how much may be withheld if his reduced schedule continues.

What Actually Matters Here

The mistake that is hardest to undo is assuming a smaller paycheck automatically means smaller Social Security withholding. It does not. What drives the outcome is the wage line on the pay stub, not total household cash flow. A worker in this position has two tasks to handle before December: update Social Security’s wage estimate if overtime or a bonus changes the total, and set aside some Work Share money for the tax bill it may generate. Phasing down from full-time work quietly rewires a retiree’s taxes in a handful of ways, and we mapped the four biggest traps in a free semi-retirement guide here.

Back to the divided workweek. Social Security counted the three days he worked and ignored the state payment covering the other two. That is the rule as written, and understanding it is the difference between a surprise letter in the spring and a plan that holds together for the rest of the year. Every situation carries its own wrinkles, and a quick call to Social Security or a tax preparer is worth the time before the schedule changes again.

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