HTS 3105.90.00 · Chapter 31
Other
General (MFN) duty, special preferential rates, and where HTS 3105.90.00 sits in the US Harmonized Tariff Schedule.
- Free
- General (MFN) rate
- None
- Special / FTA rate
- Free
- Column 2 (non-MFN)
- Ch 31
- Fertilisers
The verdict
HTS 3105.90.00 enters the US duty-free under the general (MFN) rate, no tariff applies to most imports of this classification.
- Free
- General (MFN) rate
- Ch 31
- Fertilisers
About HTS 3105.90.00
HTS code 3105.90.00 classifies imports of: Other. This line sits within Chapter 31 (Fertilisers), Section VI (Products of the Chemical or Allied Industries), and is catalogued as a tariff line in the USITC 2026 Basic Edition. The schedule specifies ad valorem (percentage-of-value) duty for this line. A footnote applies to this classification: See 9903.88.03.
The general (MFN / Column 1 General) rate for HTS 3105.90.00 is Free, which applies to most trading partners of the United States. No special preferential rate is listed for this line, so FTA origin alone will not reduce the general duty. The Column 2 rate of Free applies to imports from non-MFN countries such as Cuba and North Korea, a much higher historical "full" tariff. Because the general rate is Free, most imports under this code enter the US without duty, though anti-dumping, countervailing, or Section 301 tariffs can still apply depending on country of origin.
Footnotes: See 9903.88.03. Beyond the published rate, importers should check for Section 201 safeguards, Section 301 China tariffs, and any active AD/CVD orders that can materially change the real landed cost. Always verify the classification with a licensed customs broker before committing to a supply contract, this page is a research tool, not a customs ruling.
Duty Rate Summary, HTS 3105.90.00
| Rate Column | Value | Applies To |
|---|---|---|
| General (Column 1) | Free | Most-favored-nation (MFN) trading partners, the default rate for most US imports. |
| Special | Not listed | Preferential rates under FTAs (USMCA, CAFTA-DR, GSP, etc.) when origin qualifies. |
| Column 2 | Free | Statutory non-MFN rate for goods from countries without normal trade relations (Cuba, North Korea). |
Source: USITC Harmonized Tariff Schedule 2026 Basic Edition. See methodology for refresh cadence.
Details
- Chapter
- 31: Fertilisers
- Classification
- Tariff Line
- Footnotes
- See 9903.88.03.
Related Items in Chapter 31
Animal or vegetable fertilizers, whether or not mixed together or chemically treated; fertilizers produced by the mixing or chemical treatment of animal or vegetable products
Urea, whether or not in aqueous solution
Ammonium sulfate
Other
Ammonium nitrate, whether or not in aqueous solution
Mixtures of ammonium nitrate with calcium carbonate or other inorganic nonfertilizing substances
Sodium nitrate
Double salts and mixtures of calcium nitrate and ammonium nitrate
Mixtures of urea and ammonium nitrate in aqueous or ammoniacal solution
Other, including mixtures not specified in the foregoing subheadings
Frequently Asked Questions
What is the tariff rate for HTS 3105.90.00? ▼
What products does HTS 3105.90.00 cover? ▼
Are there any additional duties beyond the general rate for HTS 3105.90.00? ▼
Understanding This Tariff
HTS 3105.90.00 classifies under Chapter 31 (Fertilisers), Section VI (Products of the Chemical or Allied Industries). This item enters the US duty-free under the general (MFN) rate, meaning no tariff is assessed for imports from most trading partners.
Importers should verify the correct HTS classification with a licensed customs broker or US Customs and Border Protection (CBP) before importing. Misclassification can result in penalties, delays, and additional duties.
Learn More About Tariffs
Data Sources
Tariff data from the U.S. International Trade Commission (USITC) Harmonized Tariff Schedule 2026 Basic Edition.
Duty rates are subject to change. Importers should verify current rates with U.S. Customs and Border Protection (CBP) before making import decisions. Additional duties, anti-dumping duties, or countervailing duties may apply.
Related
Sources: U.S. International Trade Commission Harmonized Tariff Schedule (2026 Basic Edition) and FAO FAOSTAT Trade: Crops and Livestock. See our methodology for how figures are computed.
Every figure on PlainTariff is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.