Gypsum — HTS 2520
Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) whether or not colored, with or without small quantities of accelerators or retarders
Chapter 25 › Heading 2520
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 2520 is a four-digit product category for gypsum and related calcium-sulfate materials. It groups natural gypsum, anhydrite, and plasters made from calcined gypsum or calcium sulfate. The plasters may be colored or uncolored and may contain small quantities of accelerators or retarders—additives used to change setting time.
To reach the correct eight-digit HTSUS code, first identify the product’s material and form, then follow the relevant subheadings and tariff-line descriptions. The narrower code may distinguish gypsum from anhydrite or distinguish types of plaster based on composition or use. Confirm the complete product description, not just its marketing name; difficult classification questions may require a customs broker or a binding ruling from U.S. Customs and Border Protection.
What to check
- Check the technical data sheet, ingredient list, and manufacturing process to determine whether the product is natural gypsum, anhydrite, or calcined gypsum/calcium-sulfate plaster.
- Verify whether the product is a plaster and whether any accelerators, retarders, coloring, or other additives fit the heading’s wording and limits.
- Compare the product’s physical form and composition with every applicable subheading and eight-digit tariff-line description in the current HTSUS.
- Do not rely only on a brand name, invoice description, or a code supplied by a foreign seller; keep records supporting the classification.
- If the composition or intended classification is unclear, ask a customs broker or consider requesting a CBP binding ruling before importing.
HTS heading 2520 summary
Gypsum is a 4-digit product category containing 2 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 |
|---|---|---|---|---|
| 2520.10.00.00 👉 | Gypsum; anhydrite | Free | — | Free |
| 2520.20.00.00 👉 | Plasters | Free | — | $1.38/t |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 2520?
Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) whether or not colored, with or without small quantities of accelerators or retarders. 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.