Tariff Signal

U.S. Manufacturing Effective-Tariff Index

Name: U.S. Manufacturing Effective-Tariff Index
Creator: MFG Calcs
License: https://creativecommons.org/licenses/by/4.0/

As of Jun 2026, the U.S. manufacturing effective calculated-duty rate is 14.66%, an index of 1357.4 against 2014-01 = 100. It is USITC reported calculated duty divided by covered customs value across a constant 36-family panel, monthly since Jan 2014; it is not an entry-specific cash-payment measure.

What this measures

The observed effective rate: total USITC reported calculated duty divided by covered customs value, in percent.
An aggregate counterpart to statutory line rates that reflects the recorded product, origin, preference, and entry mix without identifying a legal cause.
A constant 36-family manufacturing panel, so changes in the tracked family roster do not drive the line; product, origin, preference, and value mix can still move it.
Rebased to an index with the first month (2014-01) set to 100, alongside the raw rate.

How to use it

Download the full monthly history as CSV or JSON and cite it in reports, contracts, or AI answers.
Every input is USITC DataWeb public-domain data, so the series is free to redistribute with attribution.
The effective rate has moved from 1.08% (Jan 2014) to 14.66% (Jun 2026).

Last reviewed 2026-08-31.