Tariff monitor · Other Families
Glass Fiber and Reinforcements: Statutory & Effective Tariff Rates
Statutory HTS duty rates for 59 glass fiber and reinforcements tariff lines (MFN Free–7.3%), from USITC. Effective rate May 2026: 10.38%; monthly history since 2023.
The short answer
- The effective U.S. tariff on glass fiber and reinforcements was 10.38% in May 2026, down from 13.93% a year earlier — calculated duties actually paid divided by customs value, from USITC data. The statutory MFN rate is Free–7.3% across 59 HTS lines in the 2026 schedule. Mexico is the largest source, holding 28.6% of 2025 imports.
Statutory rates from the schedule
- Glass fibers, rovings, mats, and woven fabric — the reinforcement behind composite tooling, panels, and molded parts. This family covers HTS heading 7019: 59 eight-digit rate lines with MFN (column 1, general) rates of Free–7.3% in the 2026 schedule.
- Chapter 99 flags on individual lines mark Section 301/232 overlay provisions (e.g. 9903.88.03) that apply on top of the MFN column.
What importers actually paid
- Latest month on record (2026-05): 10.38% effective on $142.9M of imports, versus 13.93% in the same month a year earlier. The monthly archive holds 41 observations from 2023-01 through 2026-05.
- In 2025, U.S. imports for consumption in this family totaled $1.4B in customs value and paid $172.2M in calculated duties: an effective tariff rate of 12.2%. The effective rate captures Section 301/232 overlays, exclusions, and special-program use that the statutory column cannot.
- A year earlier the effective rate was 6.51%, so the duty burden rose 5.7 points.
- Top source countries in 2025: Mexico ($403.2M at 1.4%), Canada ($243.2M at 0.89%), China ($186.6M at 49.5%), Taiwan ($70.9M at 14.3%), Germany ($63.1M at 11.43%).
- For scale, 2025 imports in this family equal 0.8% of the U.S. nonmetallic mineral products industry's $176B gross output (2025, BEA).
Representative rate lines
- 7019.11.00.00: Chopped strands, of a length of not more than 50 mm · MFN 4.9%
- 7019.12.00: Rovings · MFN 4.8%
- 7019.13.05.00: Fiberglass rubber reinforcing yarn, made from electrically nonconductive continuous fiberg · MFN Free
- 7019.13.15: Other · MFN 6.5%
- 7019.13.24.00: Fiberglass rubber reinforcing yarn, made from electrically nonconductive continuous fiberg · MFN Free
- 7019.13.28.00: Other (201) · MFN 7%
- 7019.13.35.00: Other · MFN 4.2%
- 7019.14.00.00: Mechanically bonded mats · MFN 4.3%
Frequently asked questions
- What is the U.S. tariff rate on glass fiber and reinforcements? Importers paid an effective rate of 10.38% in May 2026 (calculated duties ÷ customs value, USITC DataWeb). The statutory MFN rate is Free–7.3%; Section 301/232 overlays and special programs explain the difference.
- What is the statutory MFN duty rate for glass fiber and reinforcements? Free–7.3% across the family's 59 eight-digit HTS lines in the 2026 Harmonized Tariff Schedule (headings 7019).
- Which countries supply the most glass fiber and reinforcements to the U.S.? Top sources in 2025: Mexico ($403.2M at 1.4%), Canada ($243.2M at 0.89%), China ($186.6M at 49.5%). Sourcing is diversified: Mexico holds 28.6% of imports.
- How much glass fiber and reinforcements does the U.S. import? $1.4B of customs value in 2025, paying $172.2M in calculated duties — an effective tariff of 12.2%.
- Is the U.S. a net importer of glass fiber and reinforcements? Yes — a net importer in 2025: $1.4B imported vs $1.1B exported (exports are 77% of imports).
About this data
- Reference statistics derived from USITC published data. Not a customs ruling; verify rates with a licensed customs broker before relying on them.
Last reviewed 2026-05-12.