NOMs and imports: how to know which ones apply and keep your cargo moving

NOMs (Normas Oficiales Mexicanas, Mexican Official Standards) are mandatory technical regulations that set minimum safety, quality or labeling requirements for certain products sold in Mexico. For importers, the consequence of ignoring them is singular: the goods stop at customs.

The problem is that the list of NOM-regulated products is long and not always obvious. This guide gives you the tools to know whether your product is covered and what to do about it.

How to know if your product needs a NOM

The most direct route is the agreement that classifies and codes goods whose import is regulated by federal agencies (published by the Ministry of Economy in the Federal Register). It cross-references TIGIE tariff codes with the NOMs and prior permits that apply.

The practical process:

First, pin down the correct tariff code for your product in Mexico (do not copy the foreign supplier's code). If in doubt, your customs broker should classify it.

Second, look the code up in the agreement. If your code appears with a NOM listed, that NOM applies to your product.

Third, check what type of compliance the NOM demands: some require a certificate before importing, others allow verification at the point of entry, and others are satisfied by the product label itself.

The NOMs importers hit most often

Commercial information NOMs (Ministry of Economy): apply to textiles, footwear, furniture, stationery and many consumer products. They require Spanish-language labels with specific information (size, materials, manufacturer country, importer). Compliance is shown with a label sample or a conformity letter.

NOM-001-SCFI (electrical and electronic devices): one of the most consequential for technology importers. It requires an electrical safety certificate issued by a certification body accredited before the Ministry of Economy. The process takes 2 to 6 weeks and requires lab samples.

Cofepris NOMs: for food, beverages, drugs, cosmetics, medical devices and pesticides. Each category has its own NOM and may require a prior sanitary registration (for drugs and medical devices, a long process). For processed foods, labels must comply with NOM-051 (product name, ingredients, nutrition facts).

NOM-003-SCFI (alcoholic beverages): requires label verification and, in some cases, lab analysis, managed before the Ministry of Economy.

Profeco NOMs: products like large home appliances require energy efficiency information and warranties.

What happens if you reach customs without the NOM certificate

If the SAT or ANAM detects that your goods require NOM certification and you lack it, you have essentially two options:

Suspended clearance: the cargo sits in the bonded facility while you obtain the certificate. Meanwhile the warehouse bills by the day (demurrage in Manzanillo or Veracruz runs MXN 1,500-3,500 per TEU per day). If the process takes 30 days, you have added MXN 45,000 to 105,000 in storage on top of the certificate cost.

Returning the goods: if you cannot obtain the certificate or it is not worth the cost, the goods go back to origin. Return freight plus the original freight plus storage can exceed the value of the shipment.

In no case can products be sold without a valid NOM certificate. Profeco and the Ministry of Economy run market verifications and the fines are significant.

How to manage NOMs without slowing your operation

Certify before you import: if your product needs body certification (like NOM-001-SCFI for electronics), start the process the day you place the production order. Do not wait for the goods to arrive.

Use model certification instead of per-lot: for products you import recurrently from the same supplier, a model certificate covers every lot of the same product. Far more efficient than certifying lot by lot.

Leverage international standards: some certification bodies accept equivalent foreign certificates (UL for the U.S., CE for Europe) as the basis for a streamlined NOM certificate. Ask your certification body.

On labeling: if the product ships labeled from the factory but the label misses the Mexican NOM, it is possible to relabel in bond or in a bonded warehouse before release. More expensive than doing it at origin, but it can rescue a shipment already on the water.

Logwell manages NOM certifications for its clients, coordinating with accredited laboratories and certification bodies. If you have a product and do not know whether it needs a NOM or how to get one, contact us before placing the order: solving this is far cheaper before the goods reach the border than after.