Coffee is prepared at Vigilante Coffee in College Park, Maryland. Julio Cortez/AP

The rising costs of coffee beans are keeping roasters and their customers on edge.

Retail coffee prices jumped nearly 21% in August compared to the same time last year, and the Trump administration’s tariffs are partially to blame: In July, Brazil was slapped with one of the highest duties, at 50% , while Vietnam has 20% tariffs and Colombia has 10% tariffs.

America imports more than 99% of its coffee , according to the National Coffee Association. Most of it comes from Brazil — 30.7% of US coffee imports based on net weight, according to the UN Comtrade Database — Colombia (18.3%) and Vietnam (6.6%).

A man harvests coffee in the Santa Clara district in Rio de Janeiro state, Brazil. The coun

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