Machining centers — HTS 8457
Machining centers, unit construction machines (single station) and multistation transfer machines, for working metal
Chapter 84 › Heading 8457
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 8457 is a broad product category for certain machine tools that work metal by removing material or otherwise machining it. It groups together machining centers, single-station unit construction machines, and multistation transfer machines. These are industrial machines that hold and position a workpiece and perform machining operations such as milling, drilling, boring, or related work.
To narrow the heading to a specific code, first identify the machine’s design and principal function. Check whether it is a machining center or another type of transfer or unit construction machine; whether it is numerically controlled; and which technical features distinguish it from other products in the heading. The tariff then uses more detailed subheadings and statistical suffixes—often at the 8-digit and 10-digit levels—to separate these configurations. Do not assume that the machine’s marketing name alone determines classification.
What to check
- Read the machine’s technical specifications, including its number of stations, tool-changing capability, axes, controls, and machining operations.
- Confirm whether the equipment is designed for working metal and whether it fits heading 8457 rather than a heading for a different machine-tool type.
- Compare the product with the wording of each applicable subheading, not just the heading title; small design differences can change the code.
- Check the applicable U.S. HTS edition and all statistical suffixes, units of quantity, and reporting requirements before filing.
- If the machine has an unusual combination of functions or features, obtain a customs-broker review or seek a formal classification ruling.
HTS heading 8457 summary
Machining centers 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 |
|---|---|---|---|---|
| 8457.10.00 👉 | Machining centers | 4.2% | Free | 30% |
| 8457.20.00 👉 | Unit construction machines (single station) | 3.3% | Free | 30% |
| 8457.30.00 👉 | Multistation transfer machines | 3.3% | Free | 30% |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 8457?
Machining centers, unit construction machines (single station) and multistation transfer machines, for working metal. 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.