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HSChapter 25
U.S. imports of chalk (HS 250900) totaled $79K in April 2026, traded with 8 countries.
Importers of Chalk paid $17K in duties in April 2026 — an effective duty rate of 32% on $52K in dutiable value, based on actual customs collections rather than the published tariff schedule. Chalk imports of $79K in April 2026 ran 26% below the year-to-date monthly average of $106K.
Last updated: April 2026 dataChalk — a soft, fine-grained calcium carbonate of marine biogenic origin — enters US commerce under two distinct tariff lines: crude chalk (2509001000) and processed or refined chalk (2509002000), a split that reflects the degree of beneficiation and affects applicable duty rates. Refined chalk finds wide application in paints, coatings, plastics, rubber compounding, and agricultural lime, while crude material is used in lower-value industrial and agricultural contexts. Importers should note that the crude/non-crude distinction hinges on processing history and physical form, which CBP may scrutinize when the product sits near the boundary between the two lines.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
CBP generally considers chalk 'crude' if it has undergone no processing beyond extraction and basic sizing — such as quarrying and rough crushing. Chalk that has been ground, washed, dried, or otherwise beneficiated to meet specific particle-size or brightness specifications is typically classified as 'except crude' under 2509002000.
Refined chalk is consumed primarily by the paints and coatings, plastics, rubber, and paper industries as a functional filler and extender. Agricultural applications (soil amendment and pH adjustment) use cruder grades, while specialty grades serve the cosmetics and pharmaceutical sectors as a calcium carbonate source.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| CHINA | $60K | -- | -$60K |
| CANADA | $13K | $21K | +$9K |
| AUSTRIA | -- | $8K | +$8K |
| MEXICO | -- | $7K | +$7K |
| TURKS AND CAICOS ISLANDS | -- | $6K | +$6K |
Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2509002000 | CHALK, EXCEPT CRUDE | $77K | 33.14% | $16K |
| 2509001000 | CHALK, CRUDE | $2K | 10.01% | $226 |
CHALK, EXCEPT CRUDE
CHALK, CRUDE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2509000000 | CHALK | $51K |
CHALK
4.1K kg
PORTLAND CEMENT EXCEPT WHITE PORTLAND CEMENT
HS 252329
SULFUR OF ALL KINDS, NOT SUBLIMED,PRECIP,COLLOIDAL
HS 250300
SALT INCL TBL/DENTRD, PURE SODM CHLOR ETC; SEA WTR
HS 250100
UNGRND NAT CAL PHSPH, ALUM CAL PHOS A PHOS CHALK
HS 251010
FLUORSPAR OV 97% OF CALCIUM FLUORD BY WGHT
HS 252922
PEBBLES, GRAVEL ETC. FOR CONCRETE AGGREGATES ETC.
HS 251710
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $24K | -- | -$24K |
| Unidentified | -- | $18K | +$18K |
| Tennessee | $16K | -- | -$16K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LOS ANGELES, CA | $46K | -- | -$46K |
| LOW VALUE | -- | $18K | +$18K |
| NORFOLK-NEWPORT NEWS, VA | $14K | -- | -$14K |