HTS Chapter 99: Temporary tariff modifications and additional duties (US)
HTS Chapter 99 covers Temporary tariff modifications and additional duties (US). Browse 0 published headings, then narrow to the active product line that matches the goods.
2026 HTS Rev 19 Synced Rules verified Operational
Written to help non-specialists understand this page. Rates, dates, and legal facts come from the official records above and on the linked source.
HTS Chapter 99 is a special-purpose part of the Harmonized Tariff Schedule (HTSUS). It generally contains temporary or special provisions rather than ordinary product categories, such as additional duties, exclusions, temporary duty relief, tariff-rate quota provisions, and other trade measures. A product does not belong in Chapter 99 simply because of its material or commercial name; eligibility depends on the specific provision and its conditions.
The HTS is organized from chapter to heading to subheading, followed by a 10-digit HTSUS code. A Chapter 99 provision often works together with the product’s ordinary classification in Chapters 1–97: the Chapter 1–97 code identifies what the merchandise is, while the Chapter 99 code may identify a special measure that applies to it. To find the correct provision, first classify the product normally, then review the potentially applicable Chapter 99 headings, legal notes, descriptions, exclusions, country rules, and filing instructions. Confirm the result with current official HTSUS information or a qualified customs professional when the conditions are unclear.
What to check
- Classify the merchandise by its objective characteristics, including material, composition, construction, function, and use, before checking Chapter 99 provisions.
- Read the complete Chapter 99 heading, subheading, legal notes, and referenced provisions; do not rely only on a product keyword or short description.
- Check exclusions and scope limits, including specified materials, end uses, product forms, countries, dates, and documentation requirements.
- Determine whether the Chapter 99 provision is reported in addition to the ordinary Chapters 1–97 code and whether it creates an additional duty, an exclusion, a quota treatment, or another measure.
- Verify the current HTSUS edition and official Customs guidance before entry, and seek broker or ruling advice when classification or eligibility depends on technical facts.
How Chapter 99 provisions work
Chapter 99 is not a substitute for the ordinary product classification. Special provisions can modify treatment only when their legal notes, dates, origin, entry facts, and any required companion HTS code are satisfied.
Heading list
| HTS code | Description | Linked 8-digit entries |
|---|---|---|
| No heading data is available for this chapter. | ||
Linked measures
0 linked measure entries in the current snapshot.
Questions about HTS Chapter 99
What does HTS Chapter 99 cover?
HTS Chapter 99 covers Temporary tariff modifications and additional duties (US). This page groups the chapter’s 4-digit headings; a shipment still needs the most specific active 8- or 10-digit line supported by the product facts.
Is HTS Chapter 99 a final product classification?
No. Chapter 99 contains special classification provisions that can depend on legal notes, dates, origin, entry facts, and a separate product classification. Review the controlling provision and official HTS notes before use.