HS Codes for Ecommerce Sellers: A Practical Introduction
Learn what HS codes are, how to find the right code for your products, and why correct classification matters for duty rates and customs clearance.
Quick Answer
HS codes are 6-10 digit numbers classifying every traded product. Your HS code determines your duty rate. Wrong code = wrong duty + potential penalties.
Why It Matters
HS classification is the most important decision in import cost planning. Correct classification ensures right duty. Incorrect means underpayment penalties or unnecessary overpayment.
Formula / Framework
Example Scenario
LED desk lamps classification scenarios.
| Item | Amount |
|---|---|
| 9405.20 (Lighting, correct) | 3.9% duty |
| 9403.89 (Furniture, wrong) | 0% (risk) |
| 8513.10 (Portable lamps) | 5.3% (overpay) |
Cost Components
| Component | Typical Range | Notes |
|---|---|---|
| DIY Research | Free | hts.usitc.gov |
| Broker Opinion | $50-$200 | Provides protection. |
| Binding Ruling | Free from CBP | 30-90 days. Legal certainty. |
Common Mistakes
- Googling HS code and using first result
- Letting supplier choose code
- Same code for all products
- Not checking exclusions
Seller Checklist
- Search hts.usitc.gov, not Google
- Get binding ruling for ambiguous products
- Review codes annually
- Document classification rationale
- Have broker review new products
Ready to calculate your costs?
Try HS Code Scenario Calculator →Official Source Note
HS codes from USITC HTS (hts.usitc.gov). Binding rulings from CBP (cbp.gov).
Frequently Asked Questions
Can I change HS code after importing?
Yes via Post-Entry Amendment, but requires documentation and may trigger audit. Better to get right first.
What if I use wrong HS code?
Underpayment: back duties + interest + penalties. Overpayment: refund possible but time-consuming. Pattern of errors can trigger audits.
Last reviewed: 2026-07-01