Briefing

Why Predicted and Actual Tariff Rates Diverged in May 2025


Abstract: The predicted average effective tariff rate (AETR) for May 2025 was 17.5 percent, but the actual AETR was only 8.7 percent. This large gap motivated a systematic decomposition of the sources of divergence. Shifts in importer behavior — such as changes in sourcing strategies and product composition — account for part of the gap. In particular, imports from China and other high-tariff countries fell sharply, while imports from lower-tariff countries like Vietnam increased. The largest factor seems to be implementation frictions. Many country-product pairs that were expected to be tariffed either generated no duties or much lower-than-expected collections, likely due to legacy exemptions, shipping timing and delays in customs system updates.

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File(s): File format is text/html https://www.richmondfed.org/publications/research/economic_brief/2025/eb_25-29
Description: Briefing

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Bibliographic Information

Provider: Federal Reserve Bank of Richmond

Part of Series: Richmond Fed Economic Brief

Publication Date: 2025-08-01

Volume: 25

Issue: 29