5 Common Customs Classification Mistakes That Can Cost Importers Thousands

Incorrect product classification is one of the most expensive—and avoidable—mistakes importers make. The wrong Harmonized Tariff Schedule (HTS) code can lead to overpaid duties, shipment delays, penalties, or, in rare cases, seizure.

At Western Overseas, we’ve been guiding clients through accurate, compliant customs classifications for over 50 years. Whether you’re a seasoned importer or just getting started, avoiding these five common classification mistakes can help protect your bottom line.

1. Guessing the HTS Code Based on Product Name Alone

HTS classification isn’t as simple as matching a product name to a description. Many products fit multiple categories depending on material composition, use, or essential character.

Why it matters: A “plastic bag” for food service and one for industrial use can fall under different duty rates and PGA rules.

Tip: Always classify based on full product specs—not just the name.

2. Using Supplier-Provided Codes Without Verification

Many importers rely on HTS codes provided by overseas suppliers or manufacturers—but those codes are often inaccurate or based on foreign classification systems, not U.S. Customs rules.

Why it matters: Misuse can result in CBP reclassification, retroactive duty bills, or audits.

Tip: Confirm HTS codes with a licensed customs broker—don’t assume your supplier got it right.

3. Overlooking Component Materials or Mixed Goods

Products made from multiple materials or that perform multiple functions must be classified based on their essential character, as interpreted under CBP rules, which is not always obvious.

Why it matters: A kitchen tool made of metal and plastic could be classified under different headings depending on use.

Tip: Break down the product’s purpose and material percentage to find the most accurate match.

4. Failing to Stay Current with HTS Updates

HTS codes and duty rates change. A classification from two years ago might now have higher duties, new exclusions, or additional Section 301 tariffs depending on current trade measures and initiatives.

Why it matters: Using outdated codes can lead to overpayment or missed opportunities for duty savings.

Tip: Work with a broker (like Western Overseas) who regularly reviews your classifications for accuracy and updates.

5. Not Applying for Binding Rulings When Needed

When classifications are unclear or complex, many importers skip the formal process of obtaining a CBP binding ruling.

Why it matters: Without a ruling, you risk inconsistent treatment across ports or exposure to retroactive assessments.

Tip: For gray-area products, a CBP ruling provides legal certainty for that importer and product and helps prevent disputes, though it is still subject to revocation.

How Western Overseas Helps

Our licensed customs brokers provide:

• HTS classification support
• Tariff guidance for duty optimization
• Real-time alerts for HTS updates
• Assistance with CBP binding ruling requests

With offices across the U.S., including Long Beach, Chicago, Portland, and New York, we’re positioned to support importers nationwide with customs expertise, transparency, and accuracy.

Don’t Let Classification Mistakes Drain Your Profit

Whether you’re importing auto parts, apparel, electronics, or anything in between, incorrect classification can quietly cost your company thousands each year.

Work with a licensed, experienced partner like Western Overseas to get shipment right the first time—and every time.

DISCLAIMER: This content is intended for general informational purposes and does not constitute legal advice or replace guidance from U.S. Customs and Border Protection or a licensed customs broker.