GM’s quarterly results illustrate the folly of tariffs

General Motors, a cornerstone of American industry, is suffering the consequences of President Trump’s unconstitutional 25 percent tariffs on imported vehicles and auto parts.

In the second quarter of 2025, GM suffered a $1.1 billion tariff blow to its operating income, slashing the company’s profit margin from a healthy 9 percent to just 6.1 percent. Net income plunged by 36.1 percent from the prior quarter and by a staggering 40.7 percent compared to a year ago. Although the estimated tariff impact for the full year of $4 billion to $5 billion is less than 3 percent of GM’s overall revenue, that cost represents more than half of the typical annual income for the company over the past decade.

The consequences extend far beyond GM’s balance sheet. Tariffs, paid by importers to the federal government, are partly absorbed by companies and partly passed to consumers. We’ve especially seen this in import-sensitive sectors including furnishings, appliances, clothes and toys. Men’s shirts and sweaters, for instance, rose 4.9 percent in June alone.

When businesses “eat” the cost, as GM tried to do last quarter, the fallout is no less severe. Diminished earnings mean less capital for investment in better technology or expanded operations, slowing broader economic growth, fewer resources for pay raises or new jobs — hardly the boon for workers that tariff advocates promise.

The data confirms this. Nationwide, 14,000 manufacturing jobs disappeared in the past two months, erasing all gains in 2025. In June, real average weekly earnings dropped by 0.4 percent, an annualized loss of nearly 5 percent.

Shareholders are also feeling the pinch. Stock valuations track a company’s expected future earnings. Since 2012, GM’s stock price increased by more than 200 percent. GM’s price-to-earnings ratio today stands at 6.83, almost identical to 2012 levels. Stock prices increased alongside earnings. A sustained $5 billion annual hit, wiping out over half of GM’s annual net income, could erase more than $20 billion in market capitalization if valuations adjust.

With tariffs eroding profits, is it any wonder that GM’s stock has slid 8 percent since its post-2024 election peak and now languishes 13 percent off its 2021 highs? This affects millions of middle-class Americans and retirees with pensions and savings invested. More broadly, lower dividends and diminished returns discourage investment, starving companies of the capital needed to expand. The result: slower growth, fewer jobs and weaker wage gains.

GM, to its credit, is fighting to offset 30 percent of this burden by boosting U.S. production, cutting costs and increasing domestic content to comply with the USMCA trade agreement’s labyrinthine rules. Yet even if successful, the net impact of $2.8 billion to $3.5 billion will devour a significant slice of GM’s already thin margins. Profit margins at GM — as in most other sectors — are far less than conventional wisdom. GM’s net profit margin over the past decade has averaged less than 5 percent. In other words, a $30,000 vehicle yields less than $1,500 in profit.

GM’s plans to shift some production to U.S. plants and rework supply chains is a testament to private enterprise’s resilience. But make no mistake: These shifts sacrifice efficiency for compliance. Restructuring operations in a free market in pursuit of efficiency yields more profit, consumer benefit and economic growth. Doing so under duress to escape arbitrary tariffs may result in survival, but without these benefits. Resources that could have fueled innovation or lowered prices are now squandered on navigating artificial trade barriers.

As an important sidenote, roughly half the tariff’s cost stems from GM’s South Korean operations, a stark reminder of the folly of taxing trade with allies. Rather than strengthening ties with democratic partners through bold free-trade agreements, these tariffs risk pushing nations like South Korea toward China, America’s chief adversary. Far from economic strategy, it is geopolitical shortsightedness.

Politicians sometimes prefer tariffs to other forms of taxation because they are less visible than taxes on income or sales. This makes it easier to dodge accountability by blaming “greedy” corporations. For this reason, Trump called Jeff Bezos to deter Amazon from listing tariff costs on purchases. The White House press secretary labeled this a “hostile and political act by Amazon.”

Regardless, protectionism is not cost-free. Sustained tariffs will raise prices, shrink profits, erode real wages and slow economic growth. GM’s quarterly results are a warning.

Joel Griffith is a senior fellow at Advancing American Freedom.