HS Code vs NMFC Code
Learn when a shipment needs an HS, HTS, or Schedule B classification and when an LTL carrier may need an NMFC item number and freight class.
An HS code and an NMFC code classify the same goods for different systems. An HS code identifies a product for international customs and trade reporting. An NMFC item number identifies a commodity within the National Motor Freight Classification used in less-than-truckload shipping, and the applicable NMFC provisions lead to a freight class.
One does not convert into the other. A cross-border LTL shipment may need both because customs and the carrier are asking different questions. A domestic LTL shipment may need NMFC information but no customs classification. This guide uses U.S. terminology and was checked against the official sources listed below on July 21, 2026.
The difference at a glance
| Question | HS, HTS, or Schedule B | NMFC item number and freight class |
|---|---|---|
| What does it classify? | The product for customs, tariffs, and trade statistics | The freight as an LTL transportation commodity |
| Where is it used? | International trade | LTL rating and handling when the carrier’s rules call for it |
| What drives the result? | Product identity, material, use, and the legal classification rules | Density plus handling, stowability, and liability under the applicable NMFC item |
| What does the number look like? | Six-digit international HS subheading, extended by national systems | NMFC item number, often paired with a class from 50 to 500 |
| Who should confirm it? | The importer, exporter, customs broker, or responsible trade-compliance professional; CBP can issue a binding U.S. import ruling | The shipper and carrier using current NMFC content and the carrier’s tariff or pricing rules |
| Can it replace the other code? | No | No |
The safest working rule is simple: use the customs classification for the border filing and the NMFC information for the LTL quote or tender. Do not paste an HS number into an NMFC field or assume a freight class determines a tariff classification.
What is an HS code?
The Harmonized System is an international product-classification framework administered by the World Customs Organization. At the international level, an HS subheading has six digits. Participating countries can extend those six digits for their own tariff and statistical needs.
In the United States, two ten-digit systems matter:
- The Harmonized Tariff Schedule of the United States, usually called the HTS or HTSUS, is used for goods imported into the United States. The current USITC tariff schedule sets out tariff rates and statistical categories for U.S. imports.
- Schedule B is used for U.S. export reporting. The U.S. Census Bureau maintains the current Schedule B search and files.
The first six digits of a U.S. HTS number and a U.S. Schedule B number represent the international HS subheading, but the full ten-digit numbers are not automatically identical. The International Trade Administration’s HS code guide explains that the United States uses HTS for imports and Schedule B for exports, with national detail added after the common six-digit level.
That distinction matters in conversation. People often say “HS code” as a general label, but the shipment record may require a specific country’s full import code or export-reporting code. For a U.S. import, confirm the current HTSUS classification. For a U.S. export, confirm the current Schedule B number and the destination country’s import-classification requirements.
What is an NMFC code?
The National Motor Freight Classification is the LTL industry’s commodity-classification standard maintained by the National Motor Freight Traffic Association. The NMFTA’s current NMFC overview says the system identifies and classifies LTL freight and assigns classes from 50 to 500 based on four transportation characteristics:
- Density: weight compared with the space the packaged freight occupies.
- Handling: how readily the freight can be moved across a dock and into or out of a trailer.
- Stowability: how effectively it can share trailer space with other freight.
- Liability: the freight’s risk of damage, causing damage, or other loss exposure.
An NMFC item number and a freight class are related, but they are not synonyms. The item number identifies the commodity entry and its governing provisions. That entry may assign one class, direct the user to a density-based class, or include qualifications that change how the shipment is classified. Use current NMFC content rather than an old spreadsheet, invoice, or remembered class.
Freight class is also not a customs duty category. It helps the carrier rate and handle an LTL shipment under the applicable pricing agreement. It does not establish what the product is under the HTS, Schedule B, or a destination country’s tariff schedule.
When does a shipment need each classification?
Use this decision path.
1. Is the shipment crossing an international border?
If no, a customs classification ordinarily is not part of that domestic movement. Continue to the carrier question.
If yes, identify the direction of the move and the responsible customs parties. A U.S. import uses the current U.S. HTS classification. A U.S. export may use Schedule B for U.S. export reporting, while the importer must use the destination country’s required import classification. Do not assume one country’s ten-digit extension works in another country’s system.
2. Is the shipment moving as LTL under rules that use the NMFC?
If yes, determine the current NMFC item number and freight class or provide the accurate commodity, packaging, dimensions, and weight the quoting process requests. If no, do not add an NMFC number merely because the freight is palletized. Other modes and pricing structures may use different commodity or rating information.
3. Is the classification uncertain or high risk?
For a U.S. import, a database search is useful research, but it is not the same as a ruling for the proposed goods. The CBP Binding Ruling Program allows importers and other interested parties to request a binding pre-entry decision, including tariff classification. CBP says the request must describe the product and transaction in detail; classification advice is only as good as the facts supplied.
For NMFC questions, confirm the current item and provisions through NMFTA’s current resources and the carrier. Accurate packaged dimensions and weight remain necessary even when an item number is known.
Worked examples
U.S. import that continues by LTL
A U.S. company imports one pallet of replacement pump assemblies and then tenders the pallet to an LTL carrier for inland delivery.
The importer and its broker determine the U.S. HTSUS classification from the assemblies’ actual construction, function, and applicable tariff rules. Separately, the shipper identifies the current NMFC item and freight class required for the LTL movement. The broker cannot derive the NMFC item from the HTS number, and the carrier cannot derive the HTS classification from the freight class.
The two records should describe the same physical goods accurately, but they serve different decisions: customs entry on one side and LTL rating on the other.
U.S. export moving by LTL to the border
A U.S. seller exports a pallet of packaged components. The exporter determines the current Schedule B number needed for U.S. export reporting. The buyer or its broker confirms the destination country’s import classification. If the domestic or cross-border LTL carrier requests NMFC information, the shipper also supplies the current item number and freight class or the shipment details needed to determine them.
Calling every one of those numbers an “HS code” hides important differences. The six-digit HS subheading may align internationally, but the national extensions and the NMFC item remain separate.
Domestic LTL shipment
A distributor sends a pallet from North Carolina to Texas by LTL. No border is crossed, so there is no customs entry for that movement. The quote may still require the commodity, packaging, NMFC item, freight class, dimensions, and weight. A tariff code kept in the product master does not replace those LTL details.
Common classification mistakes
Treating the HS, HTS, and Schedule B as interchangeable
HS is the six-digit international foundation. HTSUS is the U.S. import schedule, and Schedule B is the U.S. export classification. Write down which country and direction each number serves.
Treating an NMFC item number as the freight class
Record both fields when both are requested. The item points to the applicable classification provision; the class is the rating category produced by that provision and the shipment facts.
Reusing a code without checking the product facts
A code from a prior shipment may describe a different material, function, package, or configuration. It may also be outdated. Verify the current source and the facts that support the classification.
Assuming density settles every NMFC question
Density is central to many classifications, but NMFTA still identifies handling, stowability, and liability as classification characteristics. Start with the current commodity item and read its provisions before applying a density scale.
Letting the freight quote decide customs compliance
A quote screen can collect useful shipment data, but it does not replace the importer, exporter, broker, or responsible compliance professional. Customs classification can affect duty, reporting, licensing, origin analysis, and admissibility beyond transportation price.
What to gather before requesting a quote
Prepare two short records and keep their owners clear.
For the product and customs record, gather:
- A precise product name and plain-language description.
- Materials, composition, principal use, and model or part details that affect classification.
- Country of origin and direction of trade.
- Current six-digit HS subheading plus the applicable national import or export code, if already confirmed.
- The person responsible for classification and any broker advice or ruling reference.
For the packaged freight record, gather:
- Handling-unit count and packaging type.
- Packaged length, width, height, and weight for every piece or pallet.
- NMFC item number and freight class when confirmed.
- Stackability, unusual shape, fragility, hazardous-material status, and other handling facts.
- Origin and destination postal codes, pickup date, and required pickup or delivery services.
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When the lane and packaged freight details are ready, start a cross-border freight quote. Keep customs classification approval with the importer, exporter, broker, or other responsible compliance party for the specific transaction.
