Market Data

Steel Tariffs by the Numbers: Four Family Rate Comparisons in 2025

Four steel families show why an unweighted statutory line schedule and a value-weighted observed calculated-duty rate must not be treated as the same measure.

The four tracked steel families show sizable differences between their unweighted statutory MFN line summaries and observed effective calculated-duty rates in 2025. Those gaps can reflect product, origin, preference, additional-duty, exclusion, and import-value mix; they do not identify one legal cause or decide whether a specific item should be imported.

Country aggregates provide another descriptive cut. Taiwan was the largest named source for steel fasteners at $1.9B and a 31.72% effective calculated-duty rate. These are different product and entry mixes; the comparison does not prove that origin caused the family-wide gap.

The statutory line schedule and the observed value-weighted aggregate answer different questions.

For quoting, use the verified HTS classification, origin, valuation, preference eligibility, and any applicable additional provision for the entry. Family and country aggregates can anchor sensitivity cases, but they are not substitute legal rates. Reference statistics derived from USITC published data. Not a customs ruling. MFN-Free and Special-rate fields describe statutory line coverage only; final entry liability requires origin, date, eligibility, exclusions and other transaction facts. Calculated Duties are statistical estimates, not a cash-collections ledger. Confirm classification, origin, program eligibility, and final entry liability with a licensed customs broker.

Statutory vs effective rates and source countries for every steel family. Steel family rate pages

Published 2026-07-19.