President Trump’s trade war is expected to slow economic growth across the globe this year, in large part because his aggressive use of tariffs is likely to weigh heavily on the United States, the world’s largest economy.
The economic projections were released on Tuesday by the International Monetary Fund, in the wake of Mr. Trump’s decision to raise tariffs to levels not seen since the Great Depression.
The president has imposed a 10 percent tariff on nearly all imports, along with punishing levies of at least 145 percent on Chinese goods that come into the United States. Mr. Trump also imposed what he calls “reciprocal” tariffs on America’s largest trading partners, including the European Union, Japan, South Korea and Taiwan, although he has paused those until July as his administration works to secure bilateral trade deals.
Mr. Trump’s approach has created paralyzing uncertainty for U.S. companies that export products abroad or rely on foreign inputs for their goods, dampening output just as economies around the world were stabilizing after years of crippling inflation. China and Canada have already retaliated against Mr. Trump’s tariffs with their own trade barriers, and the European Union has said it is prepared to increase levies if the United States goes ahead with its planned 20 percent tax.
The World Economic Outlook report projects that global output will slow to 2.8 percent this year from 3.3 percent in 2024. In January, the fund forecast that growth would hold steady in 2025.
The I.M.F. also expects output to be slower next year than it previously predicted.
Much of the downgrade for this year can be attributed to the impact of the tariffs on the U.S. economy, which was already poised to lose momentum this year. The I.M.F. expects U.S. output to slow to 1.8 percent in 2025, down from 2.8 percent last year. That is nearly a full percentage point slower than the 2.7 percent growth that the I.M.F. forecast for the United States in January, when it was the strongest economy in the world.
“The global economic system that has operated for the past 80 years is being reset,” Pierre-Olivier Gourinchas, the I.M.F.’s chief economist, said in a briefing with reporters this week. “The U.S. effective tariff rate has now surged past levels reached at the turn of the 20th century. Beyond the tariffs themselves, the surge in policy uncertainty — related to trade policy but also more broadly — is a major driver of the economic outlook.”
The I.M.F. forecasts also make clear that the tariffs could complicate the efforts to keep inflation contained. The fund has raised its inflation forecast for the United States to 3 percent from 2 percent this year.
Growth forecasts in China and Europe were also lowered, but the I.M.F. suggested that fiscal support by their governments could help cushion the blow of the tariffs.
The I.M.F. noted that its projections were subject to many variables that were hard to predict. The Trump administration has already delayed some of the tariffs that it imposed, and it is racing to negotiate trade deals with dozens of countries in hopes of scaling back the so-called reciprocal tariffs that it enacted on April 2.
However, the world’s largest economies — the United States and China — appear to be locked in a protracted economic standoff that could weigh on the global economy until a deal is reached.
Mr. Trump has signaled that he is prepared to adjust his tariffs when markets become overly volatile, as they did earlier this month. However, he has given no indication that he intends to reverse course.
“We must rebuild the Wealth of our Great Country, and create true RECIPROCITY,” Mr. Trump wrote on his social media site, Truth Social, over the weekend. “But for those who want the easiest path: Come to America, and build in America!”
The I.M.F. has warned for years that the fragmentation of the global economy and rising trade tensions could be a threat to productivity and global growth. Mr. Gourinchas wrote in the report that the prospect that countries could raise their tariffs to even higher levels poses major risks to growth outlook for the world and for poorer countries in particular.
“The global economy showed surprising resilience during the severe shocks of the past four years and still bears significant scars,” Mr. Gourinchas said. “It is now being severely tested once again, especially in emerging-market and developing economies with more limited buffers.”