9903.05.49 Japan Section 301 Forced Labor: 12.5% Duty Explained

Key Points

• HTS 9903.05.49 imposes a 12.5 percent additional ad valorem duty on all products of Japan under the Section 301 Forced Labor program, effective July 24, 2026, with no announced end date.
• The rate is MFN-capped: the combined total of the normal column 1 (MFN) duty plus this additional duty cannot exceed 12.5 percent, so on any product whose base MFN rate is already 12.5 percent or higher, this add-on effectively brings the total to 12.5 percent.
• The program covers all Chapter 1 through 97 products of Japan with no product-category exclusions announced as of September 7, 2026.
• The legal authorities are the USTR Section 301 Forced Labor Investigation (FLIP) final action dated July 23, 2026, CSMS message 69326983, and U.S. note 52 to Chapter 99 of the HTSUS.
• Importers must report 9903.05.49 as a secondary Chapter 99 line alongside the primary Chapter 1-97 classification on every covered entry filed on or after July 24, 2026.

On this page

1. What 9903.05.49 is and who must use it
2. What the Section 301 Forced Labor program is
3. Scope: which products and which country are covered
4. Rate, MFN cap, and how to calculate your duty bill
5. Effective date and rate window
6. How 9903.05.49 appears on a customs entry
7. Interaction with other tariff provisions
8. What importers should do
9. Key references

HTS 9903.05.49 is a Chapter 99 secondary code that adds a 12.5 percent ad valorem duty to all products of Japan under the Section 301 Forced Labor program established by U.S. note 52 to Chapter 99. The duty took effect on July 24, 2026, and applies to every Chapter 1 through 97 product entering from Japan with no product exclusions currently announced. Because the rate is MFN-capped, the sum of the column 1 (MFN) rate plus the 12.5 percent add-on is capped at a combined 12.5 percent total.

The links throughout this article go directly to the primary documents: the USTR final action, the official tariff schedule, and CBP system messages. Read the source before relying on any rate or scope claim.

What 9903.05.49 is and who must use it

9903.05.49 is a Chapter 99 HTSUS code created specifically to collect the Section 301 Forced Labor duty on goods of Japanese origin. Any importer, customs broker, or trade attorney responsible for entries of Japanese-origin merchandise needs to understand this code, because omitting it from a covered entry produces an underpayment of duties that CBP can pursue through a bill or penalty action.

Note that codes 9903.05.01 through 9903.05.09 in the same chapter are a different, unrelated program covering Section 301 Brazil. The Japan-country codes run within the range 9903.05.20 through 9903.05.84 under U.S. note 52. Do not confuse the two program families.

For a broader explanation of how Chapter 99 codes work alongside regular Chapter 1-97 classifications, see our article HTS Chapter 99 Explained: Why Your Product Has Two Codes.

What the Section 301 Forced Labor program is

The Section 301 Forced Labor program is a trade-remedy action initiated by the Office of the United States Trade Representative (USTR) targeting imports produced with forced labor in specific countries. It is legally distinct from the better-known Section 301 tariffs on China. The Japan action is governed by U.S. note 52 to Chapter 99 of the Harmonized Tariff Schedule of the United States (HTSUS). The final action authorizing the Japan duty was issued by USTR on July 23, 2026, and operationalized through CBP CSMS message 69326983.

For a comparison of Section 301 with other trade-remedy tools such as Section 232 and Section 201, see Section 232 vs 301 vs 201: Three Trade Remedy Tools Compared.

Scope: which products and which country are covered

As of September 7, 2026, 9903.05.49 covers:

• Country of origin: Japan (JP) only.
• Product scope: All products classifiable in Chapters 1 through 97 of the HTSUS. There are no announced chapter, heading, or subheading exclusions.

Because the scope is defined as all Chapter 1-97 products, importers of every product category, from food and agriculture to electronics, chemicals, machinery, and textiles, should assume coverage applies unless a future exclusion is published. Confirm the current exclusion posture in the official HTSUS or with a licensed broker before filing.

For context on how similar country-specific codes in this program work, see our articles on 9903.05.43 Hong Kong Section 301 Forced Labor: 12.5% Duty and 9903.05.45 Indonesia Section 301 Forced Labor: 10% Duty Explained.

Rate, MFN cap, and how to calculate your duty bill

The 12.5 percent rate

The additional duty under 9903.05.49 is 12.5 percent ad valorem. This is an add-on to the regular column 1 (MFN) duty that already applies to the product's Chapter 1-97 classification.

The MFN cap explained

The heading text for 9903.05.49 specifies that the total of column 1 plus this additional duty equals 12.5 percent. This MFN cap means:

• If a product's normal MFN rate is 0 percent, the 12.5 percent add-on applies in full, producing a combined duty of 12.5 percent.
• If a product's normal MFN rate is 5 percent, the add-on is effectively 7.5 percent to bring the combined total to 12.5 percent.
• If a product's normal MFN rate is already 12.5 percent or higher, the add-on is zero or nominal; the cap prevents any duty above 12.5 percent under this provision.

Calculate your landed duty correctly by identifying the base MFN rate for the Chapter 1-97 subheading, then applying the cap formula. Use our duty calculator to model specific scenarios. For a full list of 2026 tariff codes, see the 2026 tariff code overview.

Currency and basis

The 12.5 percent rate is ad valorem, applied to the dutiable customs value of the imported merchandise in the normal way. No unit-specific or compound rate components are associated with this code.

Effective date and rate window

The 12.5 percent duty under 9903.05.49 became effective on July 24, 2026, the day after the USTR final action date of July 23, 2026. As of September 7, 2026 (the as-of date of these facts), there is no announced end date. The rate window is therefore open-ended: 12.5 percent from July 24, 2026 onward until USTR or a subsequent authority modifies or terminates the action.

Importers should monitor USTR and CBP channels for any modification, suspension, or exclusion process that may be announced after September 7, 2026, as none has been announced in the facts available here.

How 9903.05.49 appears on a customs entry

Chapter 99 codes do not stand alone on a CBP entry. The standard reporting practice is:

1. Report the product's regular Chapter 1-97 HTS subheading on the first line, with its standard column 1 rate.
2. Add 9903.05.49 as a second tariff line on the same entry, with its 12.5 percent (MFN-capped) additional duty.

CBP's Automated Commercial Environment (ACE) system enforces this dual-line structure. CSMS 69326983 provides the operational details for entry filers. Confirm that your broker's entry-preparation software is updated to accept and transmit 9903.05.49 correctly.

Interaction with other tariff provisions

Importers of Japanese goods may already be subject to other Chapter 99 duties depending on the product. The Section 301 Forced Labor duty under 9903.05.49 is separate from and stacks with other applicable Chapter 99 provisions unless a specific legal authority provides otherwise. The facts block for this code does not identify any stacking exclusions or offsets.

If your Japanese-origin goods are also subject to a Section 232 or other trade-remedy code, each applicable Chapter 99 line must be reported separately. Confirm the full stack of applicable codes in the HTSUS or with a licensed broker, as the interaction of multiple Chapter 99 provisions is product-specific and fact-dependent.

If the program is subsequently modified and you have overpaid duties, the general process for recovering those duties through a court ruling or administrative action is covered in our article Tariff Refund After a Court Ruling: How Importers Recover Duties.

What importers should do

• Audit all Japan-origin entries filed on or after July 24, 2026 to confirm 9903.05.49 is reported on every covered line. Entries missing this code may be subject to CBP billing or penalties.
• Recalculate landed costs using the MFN cap formula: determine your product's base column 1 rate, then confirm how much of the 12.5 percent add-on applies after the cap. Use the duty calculator as a starting point.
• Verify ACE and software readiness with your customs broker, confirming that entry-preparation systems are transmitting 9903.05.49 correctly per CSMS 69326983.
• Monitor USTR and CBP for exclusion processes or rate changes after September 7, 2026, as no exclusion mechanism or end date has been announced in the current facts.

Key references

• Harmonized Tariff Schedule of the United States (HTSUS) - Official source for 9903.05.49 heading text, U.S. note 52, and all Chapter 99 codes.
• USTR - Section 301 Forced Labor Investigation (FLIP) final action, July 23, 2026 - The legal authority establishing the Japan duty under this program.
• CBP CSMS 69326983 - CBP system message operationalizing the July 24, 2026 effective date and entry-reporting requirements.
• Federal Register - Search for USTR Section 301 Forced Labor notices related to this action.
• eCFR - Electronic Code of Federal Regulations - Regulations governing CBP entry procedures and duty assessment.