President Trump plans to announce on Wednesday that Apple Inc. is pledging $100 billion in additional investment in the United States, the company’s latest move to ramp up its domestic production and avoid the president’s threat of tariffs on its iPhones.

The White House said in a statement that the pledge was a “significant acceleration” of Apple’s plan for more production in the United States and that the company had promised Mr. Trump to invest $600 billion domestically over the next four years.

Mr. Trump’s announcement, which was reported earlier by Bloomberg, will include the creation of what the White House is calling the American Manufacturing Program, which will focus on bringing more of Apple’s supply chain and advanced manufacturing to the United States.

The company said in February that it planned to spend $500 billion and hire 20,000 people in the United States over the next four years and open a factory in Texas to make the machines that power the company’s push into artificial intelligence. The company made similar, smaller pledges during the Biden administration and Mr. Trump’s first term, though it has not yet followed through on some of those promises.

While Apple supports more than 450,000 jobs with thousands of suppliers and partners across 50 states, the company has recently been expanding production in India. That has angered the president.

In May, Mr. Trump threatened Apple and other phone manufacturers with a 25 percent tariff on products made outside the United States.

During a speech in May in Riyadh, Saudi Arabia, Mr. Trump paused to praise Jensen Huang, the chief executive of Nvidia, for traveling with the White House delegation. Tim Cook, the chief executive of Apple, declined to attend the trip.

“I mean, Tim Cook isn’t here, but you are,” Mr. Trump said to Mr. Huang.

Later, in Qatar, Mr. Trump said he “had a little problem with Tim Cook.” The president praised Apple’s investment in the United States, then said he had told Mr. Cook, “But now I hear you’re building all over India. I don’t want you building in India.”