Import Duty on Castings from China: 2026 Rates, HS Codes & Hidden Costs

You just got the quote from your Chinese foundry. $4.20/kg for ductile iron castings. Looks great — 40% cheaper than domestic. You're already calculating the margin.

Then your freight forwarder sends the customs bill. 25% duty. Plus an additional 5% because of the HS code your broker used. Plus another 11% if you're unlucky enough to fall under an ADD order.

Suddenly your "40% savings" is down to 12%. And you're stuck with a container of parts you can't sell at the price you promised your customer.

Sound familiar? You're not alone. I've seen this play out a dozen times with buyers who thought "import duty" was just a line item. It's not — it's the single biggest variable in your landed cost, and most importers get it wrong.

Here's what you'll actually pay in 2026, how to get your HS code right the first time, and the three hidden costs that blow up your budget.

What You'll Actually Pay in 2026

Let's cut the BS. Here are the base rates for castings imported from China in 2026:

That's base rates only. Before ADD/CVD, before broker fees, before the cost of a customs bond. And note: the Section 301 tariff (List 3 and List 4A) applies to virtually all castings from China. No exceptions. No exclusions as of June 2026.

So if you're paying $100,000 for a container of ductile iron castings under HS 7325.99, you're looking at $27,900 in duty alone. Before any add-ons.

And that's if your broker classifies it correctly. Get it wrong, and you could owe another 5–8% in penalties and back duties. I've seen it happen.

Getting Your HS Code Right: This Is Where Most Overpay

The number one mistake I see? Importers let their foundry suggest the HS code. Your Chinese supplier wants to make the sale. They'll pick the code that looks right — but it's your name on the customs bond.

Here's the rule: Classify based on the finished product's function, not its composition.

A cast iron pump housing is not "7325.99 — other cast articles." It's "8413.91 — parts of pumps." The duty rate is similar in this case, but the distinction matters for ADD/CVD reviews.

Three HS code traps to watch for:

• Trap 1 — "Other cast articles" is a catch-all. Customs flags 7325.99 for physical inspection at a much higher rate than more specific codes. If your parts have a specific function (valve body, gear blank, impeller), use the code for that function. You'll clear customs faster.
• Trap 2 — Mixed materials. If your casting includes a machined surface, a threaded insert, or a plastic component, you need to classify by the material that gives the article its essential character. That's almost always the base metal, but I've seen brokers get this wrong on composite parts.
• Trap 3 — "Parts of" vs. "articles of." A cast wheel for a forklift is 8708.70 (part of a vehicle). A cast wheel for a conveyor system is 7325.99 (cast article). Same shape, different function, different code, different rate. Your supplier doesn't know where it's going. You do.

The Three Hidden Costs That Add 25% to Your Bill

Base duty is just the start. Here's what the broker won't tell you until you ask:

Hidden Cost #1: The Section 301 "List" Trap

China Section 301 tariffs are assessed on top of base duty. But here's the kicker — the HTSUS subheading for your product might have been excluded from List 3 or List 4A at some point, but exclusions expire. Most exclusions from 2022–2024 are long gone. If your broker is using an old exclusion code, you'll get a bill for back duties plus interest. I know a guy who got hit for $47,000 on a single container because his broker didn't update the exclusion status.

Hidden Cost #2: ADD/CVD — The 11% Surprise

Antidumping and countervailing duties apply to specific casting types from China. If your product falls under an ADD order, you're paying 11–15% on top of everything else. Current orders that catch most buyers off guard:

• Ductile iron waterworks fittings (ADD: 11.66%) — If you're importing pipe fittings, check this first
• Certain malleable iron fittings (ADD: 14.52%) — Covers a broader range than most people realize
• Aluminum extrusions (ADD: 15.12%) — Includes some cast aluminum components if they're classified as extrusions

The worst part? ADD/CVD is assessed on the total entered value — including the base duty. So you're paying duty on duty.

Hidden Cost #3: The Valuation Game

Customs values your goods at the transaction value — the price you actually paid. But if you're buying from a trading company (not the foundry), the transaction value includes their markup. That markup gets taxed at 27.9%. If you could buy directly from the foundry and pay the trading company separately for their service, only the foundry price is dutiable. That's called the first sale rule, and it's perfectly legal. Most importers don't use it. You should.

Let's be real: first sale requires documentation. You need the foundry's commercial invoice, proof that the goods were shipped directly from the foundry, and a clear paper trail. It's extra work. But on a $100k container where the foundry price is $65k, you save 27.9% on $35k = $9,765. Worth the paperwork.

How to Check If You're Subject to ADD/CVD

Here's a 3-step check you can run in under 15 minutes:

1. Search the ADD/CVD order list on the International Trade Administration website (enforcement.trade.gov). Search by your product description and HS code. If your HS code appears on any active order, you're subject.
2. Check the scope language. ADD orders often have narrow scope descriptions. A ductile iron pipe fitting order might cover "fittings with a nominal diameter of 4 inches or more." If yours are 3 inches, you're outside the scope. Don't assume — read the actual scope language.
3. Ask your broker for a scope review. A good customs broker can do a formal scope analysis in an hour. If they can't, find a new broker.

"I had a client who imported cast iron manhole covers. His broker told him 'no ADD applies.' I checked the scope — found an order on 'cast iron manhole covers with a ductile iron content over 50%.' His covers were 100% ductile. He'd been paying the ADD for 18 months without knowing it. Back duties plus interest: $63,000." — Robert Davis

5 Ways to Reduce Your Import Duty (Legally)

You can't avoid duty entirely. But you can cut it by 20–35% without breaking any rules. Here's how:

1. Use the First Sale Rule (Save 9–15%)

Already covered above. If you're buying through a trading company, restructure the transaction to declare the foundry's price. Requires paperwork but the savings are real. Talk to your customs broker about first sale before your next shipment.

2. Optimize Your HS Code (Save 2–5%)

Some casting HS codes have lower base rates. A valve body classified as 8481.90 (parts of valves) might have a 2.2% base rate vs. 2.9% under 7325.99. Small difference, but on large volumes it adds up. Always classify by function.

3. Use a Foreign Trade Zone (Save 15–25% on Cash Flow)

FTZs allow you to delay duty payment until the goods leave the zone. If you're doing light manufacturing or assembly in the US, you can enter castings duty-free into an FTZ, process them, and pay duty only on the value of the imported component — not on your value-added. Cash flow benefit alone is worth the setup cost.

4. Check for Exclusion or Exemption Programs

Section 301 exclusions have mostly expired, but some product-specific exclusions are still active for certain medical devices and industrial parts. Also: if your castings are for a US government contract, you might qualify for a duty drawback or exemption under the Buy American Act. Run your HS code through the CBP exclusion portal.

5. Use Duty Drawback (Recover Up to 99% of Duty Paid)

If you import castings, process them, and then export the finished product, you can recover up to 99% of the duty paid. Most importers don't bother with drawback because the paperwork is heavy. But if you're exporting finished goods, you're leaving money on the table. A drawback specialist can handle the filing for a cut of the recovery.

Common Mistakes Importers Make — and How to Avoid Them

I've been on the other side of this table for 12 years. Here's what I see over and over:

• Mistake #1: Using the supplier's HS code. Your Chinese foundry doesn't know US customs law. They're guessing. You're paying. Fix: Classify every SKU yourself before the first shipment.
• Mistake #2: Ignoring ADD/CVD scope changes. ADD orders get reviewed and expanded. What wasn't covered last year might be covered this year. Fix: Set up a quarterly review with your broker.
• Mistake #3: Not checking the Section 301 status. Exclusions expire. If your broker is using an old exclusion code, you'll owe back duties. Fix: Verify exclusion status on every shipment.
• Mistake #4: Not valuing at first sale. You're paying duty on the trading company's markup. $10k–$20k per container in unnecessary duty. Fix: Talk to your broker about first sale before your next PO.
• Mistake #5: Thinking "my broker handles it." Brokers handle the filing. They don't handle the strategy. You're the importer. You own the classification, the valuation, and the compliance risk. Fix: Learn the basics or hire a customs consultant.

Frequently Asked Questions

Your Next Steps

You've got three things to do before your next container ships:

1. Audit your HS codes. Pull the last 12 months of imports. Check every HS code against the actual product. Correct any misclassifications before customs does it for you.
2. Run an ADD/CVD scope check. Use the ITA database. If you're subject, calculate the true landed cost. If you're not, document why.
3. Ask your broker about first sale. If you're buying through a trading company, this is your single biggest opportunity to cut duty. Push them for a real answer.

Import duty is a cost you can control. Most importers treat it like the weather — just something that happens to them. Don't be most importers.

You're not just buying castings. You're buying a landed cost. Get the duty piece right, and you'll win the deal every time.

This article is for informational purposes only and does not constitute legal advice. Tariff rates and ADD/CVD orders change frequently. Consult a licensed customs broker or trade attorney for your specific situation. — Robert Davis