The Number That Decides Everything
Every imported product enters the US under one Harmonized Tariff Schedule (HTS) code. That single 10-digit number sets three things at once: your base duty rate, whether Section 301 applies, and whether the product is under an anti-dumping or countervailing duty order.
Pick the wrong code and you don't just pay the wrong duty — you can pay the wrong duty and miss a Section 301 tier and sail past an AD/CVD order, all on the same shipment.
How Much It Distorts the Bill
The US schedule has 23,694 codes. Many sit next to each other with very different rates. A few real examples:
| Product | Right code | Right duty | Wrong code (plausible) | Wrong duty | |---------|-----------|-----------|----------------------|-----------| | Stainless steel kitchen sink | 7324.10 | 0% + 25% 301 | 7324.29 (other) | different rate, maybe misses 301 list | | Wooden bedroom furniture | 9403.50 | 0% + 25% 301 + ~198% AD | 9403.60 (other wooden furniture) | misses the AD/CVD order | | Cotton T-shirt | 6109.10 | 16.5% + 25% 301 | 6109.90 (other) | different base rate |
The furniture row is the one that ruins businesses. A product genuinely under an AD/CVD order, filed under a neighboring code that isn't, looks clean on paper — until an audit catches it months or years later, with the duty plus penalties.
Two Ways It Goes Wrong
Underpaying. You classify into a lower-rate code and pay too little. CBP may catch it on entry, or months later at liquidation, or years later in an audit. The bill comes back with interest and possible penalties for negligence. "I didn't know the right code" is not a defense CBP accepts.
Overpaying. You classify into a higher-rate code and pay too much. Nobody tells you. The money is just gone. Most importers never find out, because there's no audit that refunds overpaid duty on its own.
The second case is quieter but probably more common — and it's pure margin loss.
Why Classification Is Hard
The schedule is dense legal text. A "stainless steel sink" could sit under kitchenware, plumbing fixtures, or construction hardware depending on its exact spec, mounting type, and intended use. The same physical item can be classified three ways, and the rates differ.
This is where most importers lose time: scrolling the schedule, reading chapter notes, second-guessing. The official descriptions use precise legal language that doesn't match how buyers actually describe products.
The Practical Fix
Type the product description the way a buyer would say it, not the way the tariff schedule writes it. CVDar's HTS code lookup returns the top-3 candidate codes with their duty rates, Section 301 status, and any AD/CVD flag — so you can confirm the right code against the alternatives instead of guessing.
The goal isn't to replace your customs broker. It's to arrive at the right code before you commit to a price, so the quote you give your customer is based on what you'll actually owe.
Key Takeaways
- One HTS code sets base duty, Section 301, and AD/CVD all at once — getting it wrong compounds.
- Misclassification can double the bill or miss an AD/CVD order that surfaces in an audit years later.
- Overpaying is the silent failure — money leaves and nobody flags it.
- Confirm the code against alternatives before you price the order, not after the goods ship.