Mineral or chemical fertilizers — HTS 3103
Mineral or chemical fertilizers, phosphatic
Chapter 31 › Heading 3103
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 heading 3103 is a 4-digit product category for mineral or chemical fertilizers that are phosphatic. It generally groups products whose fertilizer function is primarily to supply phosphorus, including certain phosphatic materials, whether presented as a single chemical product or as a fertilizer preparation. The heading does not by itself identify the final import classification or duty treatment.
To reach a specific 8-digit HTSUS code, first confirm that the product belongs in heading 3103 rather than another fertilizer heading. Then use the applicable subheading descriptions to distinguish the product by material or type, such as the kind of phosphate fertilizer, whether it is a named chemical product, and whether it is a mixture or preparation. The final digits are selected using the product's actual composition, form, and the precise wording of the current HTSUS provisions; a customs broker may be needed for difficult formulations.
What to check
- Obtain the product's complete ingredient list, technical data sheet, safety data sheet, and manufacturing description.
- Confirm the product's chemical identity, phosphate source, physical form, and whether it is pure, blended, or mixed with other fertilizer nutrients.
- Compare the product facts with every relevant subheading and 8-digit statistical breakout under heading 3103; do not choose based only on a marketing name.
- Check whether another HTS heading better describes the product because of its composition, use, or treatment, especially for complex fertilizer mixtures.
- Have a customs broker or classification specialist review the proposed code when the formulation contains multiple nutrient sources or does not clearly match one subheading.
HTS heading 3103 summary
Mineral or chemical fertilizers is a 4-digit product category containing 3 published product-code lines in this snapshot. A heading does not carry one universal duty rate; classification must be narrowed to the line matching the product facts.
How to find your code in this category
A heading is a product category. To get the exact duty, narrow from this 4-digit heading to a sub-category (usually by material), then open the 8-digit code that matches your product.
Open any code in the tables below to see its exact duty rate, a duty calculator (enter your shipment value → estimated duty and landed cost), the rate-change history chart, and the country-by-country breakdown (including Section 301/232 add-on duties).
Why you have to click in: a single category can contain products with very different duties. The rate depends on the specific product — its material and construction — and on the country of origin, and those only get pinned down at the 8-digit code level. That is why this page points you to codes instead of showing one rate for the whole category.
Product codes & duty rates
👇 Each row is a specific product code — click a blue code to open its full page with exact duty rates by country, the rate-history chart, and a duty calculator. 👉
| Code | Description | General (MFN) | Special | Column 2 |
|---|---|---|---|---|
| 3103.11.00.00 👉 | Containing by weight 35 percent or more of diphosphorous pentaoxide (P2O5) | Free | — | Free |
| 3103.19.00.00 👉 | Other | Free | — | Free |
| 3103.90.01.00 👉 | Other | Free | — | Free |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 3103?
Mineral or chemical fertilizers, phosphatic. To classify a specific item you must pick the matching sub-category and 8-digit code above; the right choice usually depends on the material and construction of the product.
How do I choose the right code within this category?
Start from the sub-categories (typically divided by material—for example cotton versus man-made fibers), then open the active 8- or 10-digit code that matches the product. When unsure, a licensed customs broker or a CBP binding ruling can confirm the classification.
Reference information only, not customs, legal, or classification advice. Confirm the current code and rate against the official HTS before you import.