The price on a factory quote is only the first line of your cnc parts cost. For US importers buying from China, that price is now followed by a stack of tariffs, customs fees, freight and brokerage charges. Depending on the material and classification, duties alone can add anywhere from roughly 40% to more than 75% of the part value. This guide explains how China CNC machining tariffs work as of November 2026, how to find the right HS code for machined parts, and how to build a repeatable cnc parts landed cost calculation before you approve a purchase order.
Your landed cost equals the part price plus freight, insurance, duties, customs fees, brokerage and delivery. Duties are the part of your cnc parts cost that changed most in 2026. Under current cnc machining tariffs, most China-origin machined parts face a Section 301 duty (25% for List 1 to 3 products, 7.5% for List 4A), plus a 12.5% Section 301 forced-labor duty that started on July 24, 2026. Steel, aluminum and copper parts can also fall under Section 232, which since April 6, 2026 is charged on the full customs value, at 50% or 25% depending on the annex.
The right classification decides everything, including your final cnc parts cost. The same CNC operation can produce parts that land in very different duty lanes. The $800 de minimis shortcut is gone for prototypes and small orders. Build duty into your cnc parts cost on every shipment. A set of Section 301 exclusions is scheduled to expire on November 9, 2026, which is one week away.
What Is Actually Inside Your CNC Parts Cost?
Buyers often compare quotes for cnc machine parts by unit price alone. A fair comparison uses the full landed figure, because the true cnc machine parts cost includes everything between the factory floor and your dock. The main components of custom cnc parts cost when you import are:
- Part price: machining, material, finishing, inspection and packaging, as quoted by the supplier.
- Tooling and setup: fixtures, programming and first-article work, either itemized or spread across the unit price. Amortized tooling inside the unit price is part of the dutiable value.
- International freight and insurance: air, express or ocean, priced by weight, volume and service level.
- Import duties: normal (MFN) duty plus any additional Section 301 and Section 232 duties.
- Customs processing fees: the Merchandise Processing Fee and, for ocean freight, the Harbor Maintenance Fee.
- Broker and filing costs: customs entry, ISF filing, bond and any document fees.
- Domestic delivery: drayage, trucking or last-mile carrier charges.
- Cost of waiting: inventory carrying cost for longer ocean transit compared with air.
The Tariff Stack for China CNC Machined Parts in November 2026
A China-origin CNC part can be hit by several separate duty layers at once, which is why cnc machining tariffs are hard to estimate from a quote alone. Each layer has its own legal basis, its own rate and its own reporting code, so you need to check them one at a time when estimating cnc parts cost.
Layer | Current rate on China-origin goods | Where it applies |
MFN (normal) duty | Often 0% to about 5% for machined parts | Every import, based on the HTS code |
Section 301, Lists 1 to 3 | +25% | Products whose 8-digit HTS code is on the list |
Section 301, List 4A | +7.5% | Products on List 4A |
Section 301, four-year review increases | 25%, 50% or 100% | Specific strategic products such as EVs, batteries, semiconductors and solar cells |
Section 301, forced-labor action | +12.5% (heading 9903.05.31) | Most China-origin goods entered since July 24, 2026 |
Section 232, steel, aluminum, copper | 50% (Annex I-A) or 25% (Annex I-B) of full customs value | Metal articles and listed derivative products |
IEEPA tariffs | None | No longer collected after the Supreme Court decision earlier in 2026 |
Section 301: still the backbone of the China tariff
Section 301 duties attach to the country of origin and the HTS code, and they stack on top of the normal MFN duty. USTR confirmed on October 7, 2026 that the 2018 China actions remain in effect after the continuation requests it received in the second four-year review, and that rates did not change. A separate notice describing the rest of the review process had not yet been published at the time of writing. You can follow the current status on the USTR four-year review page.
The new 12.5% forced-labor duty
On July 24, 2026, USTR began collecting a new Section 301 duty on about 60 economies whose forced-labor import prohibitions it found missing or inadequately enforced. The duty took effect at the moment the temporary Section 122 surcharge expired. China sits in the 12.5% group, and the duty is charged in addition to the existing China Section 301 list rates. Importantly, it does not apply to articles already covered by Section 232. Trade press has reported legal challenges to the action, but until a court rules otherwise the duty is collected at entry.
Section 232 on metal parts: the full-value change
Since April 6, 2026, Section 232 duties on steel, aluminum and copper derivative products are assessed on the full customs value of the article, not only on the metal content. Articles made entirely or almost entirely of these metals are charged 50%. Many derivative articles are charged 25%. A June 2026 proclamation adjusted some categories, including a reduced-rate treatment for certain industrial machinery. Official guidance is published by US Customs and Border Protection.
For a machined steel or aluminum part, this is frequently the largest single duty line in the cnc parts cost. Two practical points matter:
- Parts made of 15% or less covered metal by weight can fall outside the metals action, but that exception is not available for goods in HTS chapters 72, 73, 74 and 76.
- Section 232 stacks with the China Section 301 list duty, so a China-origin steel bracket can pay both.
Exclusions expiring November 9, 2026
A group of 178 product-specific Section 301 exclusions, claimed under headings 9903.88.69 and 9903.88.70, is scheduled to end at 11:59 p.m. Eastern time on November 9, 2026. When I checked, I found no announcement of a further extension. If any of your parts rely on an exclusion, budget for the full duty from November 10 unless USTR acts. Exclusions are written around a product description, not a part number, so a design revision can end your eligibility.
HS Code vs HTS Code: How to Classify Machined Parts
Buyers use the terms interchangeably, but they are not identical. The HS code is the international six-digit standard used by customs authorities worldwide. The US adds more digits to form the HTS code, which has 10 digits. Duty rates, Section 301 list status and Section 232 coverage are all determined at the US level, so the full HTS number is what your broker files. An international hs code for machine parts is only the starting point.
There is no single hs code for machine parts. Classification depends on what the part is, what it is made of, what it is used for and how complete it is. Searches for a machined parts hs code or machining parts hs code usually lead to the same handful of headings:
Heading | Typical use | Common examples |
8466 | Parts and accessories for machine tools | Tool holders, chucks, fixtures, adapters, work holders |
8479 | Parts of machines with individual functions | Machined components made for a specific machine type |
8483 | Transmission parts | Shafts, gears, housings, couplings |
7326 | Other articles of iron or steel | Steel brackets, supports and fabricated pieces with no more specific heading |
7616 | Other articles of aluminum | Aluminum brackets, plates and machined housings |
7318 | Threaded and non-threaded fasteners | Screws, bolts, studs, nuts and washers |
3926 | Other articles of plastics | Machined plastic spacers, insulators and housings |
If you are specifically searching for a cnc machine parts hs code, remember that the machining process itself does not set the code. A turned shaft, a milled bracket and a drilled plate can sit under completely different headings, and the same machined steel bracket can classify differently depending on the machine it is built for.
Four rules of thumb help you choose the right machined parts hs code:
- Look for the most specific heading first.Basket headings such as 7326 and 8479 apply only when nothing more specific fits, so check this before you lock in a cnc machine parts hs code.
- Material and function both matter.A part dedicated to a machine tool may move toward 8466, while the same geometry in aluminum or plastic can leave the steel lane altogether.
- Document the facts.Keep the drawing, material grade, function, end use and condition at import together in one file, so your machining parts hs code can be defended at entry.
- Use a binding ruling for repeat volume.CBP can issue a binding classification ruling when classification materially changes the landed cost.
Classification errors can push cnc parts cost up or down by thousands of dollars. Suppliers can provide the technical facts, but the importer of record and the customs broker are responsible for the final classification of every cnc machine parts hs code.
The Landed Cost Formula
Use this structure every time you evaluate a quote or estimate cnc parts landed cost:
Landed cost = part price + international freight + insurance + total duties + MPF + HMF + brokerage and filing + domestic delivery
Where:
- Total duties= customs value × (MFN rate + Section 301 rate + forced-labor rate if applicable + Section 232 rate if applicable)
- MPF(Merchandise Processing Fee) = 0.3464% of entered value, subject to a minimum and maximum per entry (roughly $33.58 and $651.50 for fiscal year 2026; confirm on the CBP site)
- HMF(Harbor Maintenance Fee) = 0.125% of value, ocean shipments only
Step-by-step process
- Collect the drawing, material grade, finish, quantity and the supplier’s unit price and Incoterm.
- Confirm the machining parts hs code (the full HTS code) with your broker, down to the 8 or 10-digit level.
- Check that code against the Section 301 lists, the Section 232 annexes and the current exclusion list.
- Apply each duty rate to the customs value, remembering that the forced-labor duty does not apply to Section 232 articles.
- Add MPF, HMF, freight, insurance, brokerage and domestic delivery.
- Divide the total by the quantity to get the true per-piece cnc parts cost.
- Recheck the model whenever the entry date, part revision or sourcing route changes.
Worked Example: Three Parts, Same $10,000 Order
The table below compares the cnc parts cost for three hypothetical $10,000 orders shipped by ocean. The duty rates are illustrative assumptions used to show how the layers combine. Real rates depend on the exact HTS code, entry date and exclusion status, so confirm every line with your broker before relying on any number.
Assumptions for all scenarios: freight $900, insurance $60, brokerage and filing $175, domestic delivery $250, MPF $34.64, HMF $12.50.
Line | A: Steel bracket (Section 232 at 50%) | B: Aluminum housing (Section 232 at 25%) | C: Plastic spacer (no Section 232) |
Part price (customs value) | $10,000 | $10,000 | $10,000 |
MFN duty (assumed) | 2.9% = $290 | 2.5% = $250 | 5.3% = $530 |
Section 301 list duty | 25% = $2,500 | 25% = $2,500 | 25% = $2,500 |
Section 301 forced-labor duty | Not applied (Section 232 article) | Not applied (Section 232 article) | 12.5% = $1,250 |
Section 232 duty | 50% = $5,000 | 25% = $2,500 | None |
Total duties | $7,790 | $5,250 | $4,280 |
Effective duty rate | 77.9% | 52.5% | 42.8% |
Freight, insurance, fees, broker, delivery | $1,432 | $1,432 | $1,432 |
Total landed cost | about $19,222 | about $16,682 | about $15,712 |
Landed cost as a multiple of part price | 1.92x | 1.67x | 1.57x |
Three lessons about cnc parts cost stand out. First, material and classification can swing the result by thousands of dollars on an identical order value. Second, the cheapest quote is not always the lowest cnc machine parts cost once duties and freight are added. Third, duty is a percentage of value, so a higher unit price multiplies the duty bill as well.
Other Costs That Catch Buyers Off Guard
De minimis is no longer a safety net
De minimis treatment ended for China and Hong Kong in May 2025 and for all other origins in August 2025, and a CBP rule effective June 24, 2026 indefinitely suspended the exemption for goods arriving by modes other than the international postal network. A single prototype under $800 now needs a correct HTS code, origin information, a proper commercial invoice and a duty calculation, like any other import.
Incoterms change who pays
Under EXW or FOB terms, you arrange and pay for freight and customs entry. Under DDP, the supplier or forwarder handles duty, but the cost moves into the quoted price. It does not disappear. Always ask for a duty breakdown, not just a single all-in number, so you can compare cnc parts cost fairly across suppliers.
Declared value must match the real transaction
Under-declaring value to cut duty exposes the importer to penalties, back duties and possible seizure. Any supplier suggesting it to lower your cnc parts cost is a risk, not a saving.
Rerouting through another country does not change origin
Section 301 follows country of origin, not the port of departure. Repacking, relabeling or light assembly in a third country does not change a part’s origin. Origin changes only when processing creates a new article with a different name, character or use. For metal parts, also keep melt-and-pour or smelt-and-cast records.
Dates to Watch Through the End of 2026
Date | Event | Why it matters |
November 9, 2026 (11:59 p.m. ET) | Scheduled expiry of 178 Section 301 exclusions | Parts entered under 9903.88.69 or 9903.88.70 revert to the full duty unless USTR extends |
Pending | USTR notice describing the second four-year review process | Rates could change by product, up or down |
Ongoing | Court challenges to Section 232 full-value assessment and the forced-labor duty | Outcomes could change the duty base or rate |
December 31, 2027 | End of the temporary capped-rate framework for certain industrial machinery under Section 232 | Applies only to listed machinery, check your annex |
How to Reduce Your Custom CNC Parts Cost Without Cutting Corners
Controlling cnc parts cost starts with a landed-cost model, not with rate shopping. Once you have the model, the legitimate levers are:
- Verify classification.An accurate code can reveal whether a part is actually on a Section 301 list or inside a Section 232 annex.
- Check exclusions early.If a product description matches an active exclusion, claim it correctly, and plan for the November 9 cutoff.
- Review the design and material.Where function allows, a different material can change the Section 232 outcome. A switch from steel to a plastic or composite may leave the metals action entirely.
- Consolidate shipments.Fewer, larger shipments dilute fixed brokerage and filing charges and reduce per-piece freight, which lowers cnc machine parts cost per piece.
- Evaluate first-sale valuation.In multi-tier supply chains with clean records, the first sale may support a lower dutiable value. This requires legal review and strong documentation.
- Consider bonded warehousing or Foreign Trade Zones.These can defer duty timing for larger programs, but they do not remove duty on goods entering US commerce, and rules for covered metals changed in 2026.
- Compare alternative origins carefully.Moving production out of China can lower the Section 301 layer, but other countries now face their own Section 301 forced-labor duties of 10% to 12.5%, and Section 232 applies to metal parts from almost everywhere.
These approaches depend on the specific transaction. Work with a licensed customs broker or trade counsel before relying on any of them.
RFQ Checklist for an Accurate Landed Cost Quote
Send your supplier and broker the same information so your cnc parts cost estimate lines up:
- 2D drawing and 3D CAD model with a drawing or part number
- Exact material and grade (for example 6061-T6 aluminum or 304 stainless steel)
- Finish, plating or coating
- Quantity breaks and annual volume
- Intended use or the machine the part belongs to (needed to confirm the hs code for machine parts)
- Incoterm and destination port or address
- Target delivery date and shipping method (air, express or ocean)
- Request for an itemized quote that separates part price, tooling and shipping, so you can calculate cnc parts landed cost
A useful invoice description names the specific article, for example “304 stainless steel machine tool adapter, machined to drawing A1047,” rather than a vague label such as “metal parts.” Vague descriptions slow broker review and can stall an entry.
Conclusion
China can still be a strong source for cnc machine parts and other precision machined components, but the unit price on the quote is no longer a reliable guide to your real cnc parts cost. Accurate classification, a clear view of how cnc machining tariffs stack across Section 301 and Section 232, and a written cnc parts landed cost model are what separate a good sourcing decision from a surprise invoice. Rebuild your cnc parts cost model for each part number, recheck it before every purchase order, and keep an eye on the November 9 exclusion deadline and the pending four-year review.
Frequently Asked Questions
What is the average cnc parts cost after tariffs?
There is no single average cnc parts cost. As the worked example shows, the same $10,000 order can land at roughly 1.6 to 1.9 times the factory price, depending on material, classification and shipping method. Build the figure per part number rather than relying on a blanket percentage.
Who pays the tariff, the buyer or the Chinese supplier?
The importer of record pays duties to US Customs and Border Protection. Incoterms decide who arranges and funds the entry. With DDP pricing, the supplier collects the duty through the unit price, so DDP does not lower your cnc parts cost.
How do I find the HS code for machined parts?
Start with the part’s material, function and end use, then look for the most specific heading in the Harmonized Tariff Schedule to settle your machined parts hs code. Confirm the full 10-digit HTS number with a licensed customs broker, or request a CBP binding ruling for high-volume parts.
Are tariffs charged on tooling that stays in China?
Tooling that never leaves China is not imported or charged duty as a separate item. However, when its cost is spread across the per-part price, that amount is inside the dutiable value of the parts.
Do Section 301 tariffs apply if parts are shipped from Vietnam or Mexico?
The China Section 301 duties follow the country of origin, not the shipping route. A part that is still of Chinese origin pays them wherever it is shipped from. Other countries have their own, separate duty exposure.
Can I avoid duty on a prototype or sample?
Not by calling it a prototype. A sample enters as a physical product with a material, function and classification, and the de minimis exemption no longer covers it. Include duty in your cnc parts cost and prepare complete entry documentation.
