Will stopping immigration cause labor shortages?

[1][2][3][4]Yes, stopping (or sharply curtailing) immigration is highly likely to cause or worsen labor shortages in key sectors and constrain overall U.S. labor force and economic growth, based on demographic trends, current data from recent immigration slowdowns, sector reliance on immigrant workers, and economic research. This is not absolute or permanent in every case—markets adjust via higher wages, automation, reduced output, offshoring, or higher prices—but the evidence points to significant frictions, especially short- to medium-term.[1]

Demographics and Labor Force Growth

The native-born working-age population in the U.S. has slow or stagnant growth due to low fertility rates and aging (baby boomers retiring). Without immigration, the working-age population would have begun shrinking years earlier. Immigrants (foreign-born, including naturalized citizens, legal residents, and undocumented) have driven a large share of labor force growth for decades and currently make up roughly 18–19% of the civilian labor force (around 30+ million workers).[5]

Recent sharp drops in net international migration (from millions annually to near-zero or negative in estimates for 2025 onward, amid enforcement and policy changes) have already slowed labor supply. Economists project “potential” or break-even monthly payroll growth (jobs needed to keep unemployment stable without shortages) falling dramatically—from over 100,000–170,000 to as low as 10,000–60,000 or near zero in some forecasts—limiting sustainable economic expansion. Aging intensifies this. Federal Reserve analyses and others link reduced immigration directly to slower labor force growth and lower potential GDP.[2]

Sector-Specific Reliance and Observed Shortages

Immigrants are concentrated in certain industries and occupations, often filling roles with high physical demands, seasonality, lower pay, or specific skills that natives fill less readily:

Recent crackdowns have coincided with reports of tighter markets in trades and construction, slower overall job growth, and businesses struggling to fill positions—without clear corresponding gains in native-born employment. Native-born unemployment has in some periods risen or stayed elevated alongside falling foreign-born employment, consistent with mismatches rather than simple substitution.[9]

Do Natives Fill the Jobs? Evidence on Displacement and Complementarity

Economic consensus (from National Academies, numerous studies) is that immigrants do not broadly “take jobs” from natives in a fixed-pie sense. The economy is not zero-sum: immigrants are also consumers and entrepreneurs who increase demand and create jobs. They often complement natives (different skills, willingness for certain work, or enabling expansion that hires more natives, e.g., more construction projects needing supervisors/managers).[10]

Immigrants have higher labor force participation in many cases and fill gaps from demographic decline. Stopping inflows (or large deportations) shrinks the pie more than it redistributes slices.

Historical Context and Adjustments

U.S. history shows labor shortages prompting immigration facilitation (e.g., Civil War-era encouragement, WWII Bracero Program for Mexican agricultural/rail workers amid wartime needs). 1920s quota restrictions reduced inflows sharply; some analyses link related demographic/labor effects to economic strains (though Depression causes were multifaceted).[12]

Adjustments occur: automation (e.g., more machinery in agriculture/construction), higher wages/conditions to attract natives or retain workers, reduced domestic production of labor-intensive goods, or imports. High-skilled immigration cuts hit innovation/productivity harder. Low-skilled cuts hit volume/capacity in services and goods. Complete “stopping” is rarely absolute (family, refugees, etc., persist at low levels), but sharp sustained reductions produce the shortages and growth drag described.

Caveats and Broader Picture

In short, evidence from demographics, real-time slowdowns, sector data, and rigorous studies indicates that halting immigration would cause labor shortages—especially acute in agriculture, construction, and related fields—while slowing overall growth more than it “frees up” jobs for natives. Markets and policy (training, automation incentives, targeted legal pathways) can mitigate, but the transition involves real costs in output, prices, and capacity.