Getting a daily caffeine fix could become more expensive.

President Trump’s plan to impose a 50 percent tariff on all imports from Brazil starting next month would drive up the price of coffee, whether it’s served in cafes or brewed in the kitchen.

Such a tariff would put more pressure on the coffee industry as prices have peaked globally this year. Droughts in Brazil and Vietnam, two of the biggest coffee exporters to the United States, have resulted in smaller harvests in recent seasons, driving up prices.

Consumers are already paying more at the grocery store. At the end of May, the average price of one pound of ground roast coffee in the U.S. was $7.93, up from $5.99 at the same time last year, according to the U.S. Bureau of Labor Statistics.

Mr. Trump’s pledge to place tariffs on Brazil’s imports is partly in retaliation for what he considers a “witch hunt” against his political ally, the former Brazilian president Jair Bolsonaro, who is facing trial for attempting a coup.

More than 99 percent of the coffee Americans consume is imported from South America, Africa and Asia. Last year, the United States imported 1.6 million metric tons of both unroasted and roasted coffee, according to the Agriculture Department.