How US To Mexico Cross-Border Shipping Works: The Complete Guide

Cross-border shipping from the US to Mexico works in five steps: your goods leave a US warehouse, US export is completed, a transfer tractor moves the trailer across the border, a licensed broker files the pedimento and pays duty and IVA, and the goods are released for delivery. With complete paperwork, clearance at Laredo is usually same day and delivery to Monterrey takes 1 to 2 business days. Commercial imports require a Mexican RFC and a customs broker.

• A licensed customs broker (agente aduanal) must file the pedimento; since January 2025 every import declaration requires the importer of record's RFC (trade.gov).
• Import IVA is 16 percent, with a conditional 8 percent in the border zone (SAT, trade.gov).
• US origin goods enter at 0 percent duty on most products under the USMCA; goods from countries without a treaty face higher tariffs under the 2026 decree.
• A well documented full truckload from Laredo reaches Monterrey in 1 to 2 business days (BringGo Ship operations data).
• Laredo is North America's busiest inland port, with more than 17,000 trucks crossing per day (City of Laredo, 2026).

How does cross-border shipping from the US to Mexico work?

It is a chain of five steps that connects a US warehouse to a Mexican destination: export from the US, transfer across the border, customs clearance in Mexico, release, and domestic delivery.

Cross-border shipping is not one movement but a coordinated sequence. Your goods leave a US warehouse, ideally after the documents have been checked. US export formalities are completed on the American side. A transfer tractor then moves the trailer to the Mexican side of the border, a short step known as transfer or drayage. There, a licensed customs broker files the pedimento, the official import declaration, and pays the duty and IVA. Mexican customs assigns a green or red light, and once the goods are released, a domestic carrier takes them to their destination, such as Monterrey. Most of this traffic runs through Laredo because it is North America's busiest inland port. An operator with warehouses on both sides of the border can run the whole chain from one place: BringGo Ship works this model from its Laredo and Monterrey warehouses with a licensed customs broker.

What are the steps, from the US warehouse to a Mexican doorstep?

Five: leave the US warehouse, complete US export, transfer across the border, clear the pedimento in Mexico, and deliver domestically.

Seeing the shipment as steps makes it clear where a load can stall. First, the goods leave the US warehouse; this is the moment to confirm the invoice, packing list, and classifications. Second, US export formalities are completed on the American side. Third, the transfer or drayage tractor physically moves the trailer into Mexico. Fourth, the customs broker transmits and clears the pedimento, paying duty and IVA; at this point customs decides the light. Fifth, the released goods move by domestic transport to their final destination. Each step depends on the one before it, so an incomplete document in step one becomes a delay in step four. That is why a document review before the freight leaves the warehouse is the best use of time in the entire process.

What documents do you need to ship to Mexico?

Five core documents: commercial invoice, packing list, correct HS codes, certificate of origin for the USMCA rate, and the Complemento Carta Porte for the Mexican road leg.

The shipment rests on a consistent set of documents. The commercial invoice sets the value and description; the packing list details the contents per pallet with weights and dimensions; the HS codes (tariff classification) determine the duty and must be correct, because a wrong code raises inspection risk. The certificate of origin is what earns the USMCA preferential rate, and in 2026 it must be uploaded digitally before the shipment; if it is missing, you pay the full third country duty. The Complemento Carta Porte is required for road transport inside Mexico. The rule that prevents most delays is simple: the invoice, packing list, and pedimento must say exactly the same thing in value, quantity, and description.

How long does cross-border shipping to Mexico take?

With complete paperwork, clearance is usually same day and delivery to Monterrey takes 1 to 2 business days. Interior points add 2 to 4 days, and a red light adds 1 to 2 days.

Transit time is driven by customs, not distance. The Laredo infrastructure is fast because of its volume, so documentation is what makes the difference. With complete, consistent papers, clearance is usually same day and the goods reach Monterrey in 1 to 2 business days. For interior destinations like Mexico City, add 2 to 4 days of domestic transport. If the load draws a red light (rojo), physical inspection adds 1 to 2 days. Season matters too: around El Buen Fin in November and the December peak, the bridge and customs get busier, so leave a 2 to 3 day buffer. The table below summarizes the southbound timeline through Laredo.

How much does it cost to ship to Mexico?

The fiscal cost combines the broker fee, duty, and IVA, plus freight. IVA is 16 percent; duty is 0 percent on most US origin goods under the USMCA.

The landed cost of a shipment has a few parts. The customs broker fee runs roughly 3,500 to 15,000 MXN per operation, or about 0.35 to 0.65 percent of value. Import IVA is 16 percent, with a conditional 8 percent in the border zone. Duty depends on origin: US origin goods enter at 0 percent on most products under the USMCA. A 2026 point to note: the decree effective January 1 raised tariffs to between 10 and 50 percent on 1,463 tariff lines for goods from countries without a treaty, such as China. There is also a de minimis for US origin goods under the USMCA: no tax up to 50 US dollars and no duty up to 117 US dollars. On top of the fiscal cost sits the freight itself. Because rates and rules shift, confirm the tariff for your product with your broker before each season.

Do you need a Mexican RFC and a customs broker?

For commercial imports, yes to both. Only a licensed broker can file the pedimento, and an RFC is required; if you lack one, an importer of record (IOR) lets you start.

Two requirements are non-negotiable for commercial importing. First, an RFC (the Mexican tax ID) and importer registration; since January 2025 every import declaration requires the importer of record's RFC, and the courier channel now asks for the consignee RFC as well. Second, a licensed customs broker (agente aduanal), because only a registered broker can file the pedimento. The 2026 reform added shared liability, so the importer and broker are jointly responsible for the declaration. If you do not yet have your own RFC, you can still ship through a partner that acts as the importer of record and clears the goods in its name while you complete your registration. This is a common way for a new seller to start selling into Mexico without waiting on paperwork.

Should you use LTL or FTL?

Roughly up to six pallets, less than truckload (LTL) is cheaper; for a full trailer, full truckload (FTL) is faster and clears on a single pedimento.

The choice comes down to volume. FTL means the trailer is yours: it moves on your schedule, crosses on a single pedimento, and is handled less, so there is less risk of damage or delay. For Laredo to Monterrey, a well documented FTL load usually arrives in 1 to 2 business days. LTL suits smaller volumes, roughly one to six pallets, where your freight shares the trailer with other shipments; that lowers the cost per pallet but adds consolidation time. A practical threshold: up to about six pallets, LTL is usually economical; a full trailer or an urgent, fragile load points to FTL. As your volume grows, moving to FTL tends to lower your per unit cost and speed up the border, so it is worth reviewing the mix regularly.

What are the most common mistakes that delay a shipment?

An invoice that does not match the pedimento, a wrong HS code, and a missing or late certificate of origin. All three are preventable before departure.

Most delays come from avoidable errors at the origin. The most common is an inconsistency between the invoice and the pedimento in value, quantity, or description, which triggers a hold. Next is an incorrect HS code, which changes the duty and raises the chance of a red light. Third, increasingly relevant in 2026, is failing to upload the certificate of origin digitally before shipment, which costs you the USMCA rate. Timing adds risk too: a trailer that reaches the border late on a Friday can sit through the weekend. Under the 2026 reform, the importer and broker share liability, so accuracy matters more than ever. The fix is always the same: verify every document while the freight is still at the warehouse, not at the bridge.

Cross-border shipping to Mexico: steps and typical time (2026)

Definitions

• Pedimento: The pedimento is Mexico's official electronic import declaration, filed by a licensed customs broker.
• Transfer or drayage: The transfer is the short move that hands the trailer from one side of the border to the other during clearance.
• IVA: IVA is Mexico's value added tax, with a standard rate of 16 percent.
• RFC: The RFC is the Mexican tax ID required to import goods commercially.

Frequently asked questions

How does cross-border shipping to Mexico work in simple terms?

Your goods leave a US warehouse, clear US export, a transfer tractor moves them across the border, a licensed broker clears the pedimento and pays duty and IVA, and a domestic carrier delivers them. With good paperwork, Laredo to Monterrey takes 1 to 2 business days.

Do I need a customs broker to ship to Mexico?

For commercial imports, yes. Only a registered agente aduanal can file the pedimento. You provide the invoice and product details; the broker classifies the goods, calculates duty and IVA, and transmits the declaration to the SAT.

Do I need a Mexican RFC?

Yes for commercial imports. Since January 2025 every import declaration requires the importer of record's RFC. If you do not have one, you can ship through a partner acting as importer of record while you complete your own registration.

How long does it take to ship from the US to Mexico?

With complete paperwork, clearance is usually same day and delivery to Monterrey takes 1 to 2 business days. Interior cities like Mexico City add 2 to 4 days, and a red light inspection adds 1 to 2 days.

How much duty will I pay?

US origin goods enter at 0 percent on most products under the USMCA, plus 16 percent IVA. In 2026, goods from countries without a treaty can pay 10 to 50 percent on 1,463 tariff lines. Confirm your product's tariff with your broker.

What is the difference between LTL and FTL to Mexico?

LTL shares the trailer with other shipments and suits about one to six pallets, lowering cost per pallet but adding days. FTL is a dedicated trailer, faster and cleaner at the border, and better for full or urgent loads.

What is the biggest cause of delay?

A mismatch between the commercial invoice and the pedimento, followed by a wrong HS code. Both are prevented by checking the documents before the freight leaves the warehouse rather than at the border.

Can BringGo Ship handle the whole process?

Yes. With warehouses in Laredo and Monterrey and a licensed customs broker, it coordinates export, the border transfer, customs clearance, and domestic delivery in one place, and reviews documents before the crossing to avoid holds.

Create a free account and set up your first shipment to Mexico with BringGo Ship

Sources

• SAT (Mexico tax and customs authority) (sat.gob.mx)
• US Department of Commerce, Mexico customs guide (trade.gov)
• City of Laredo (World Trade Bridge data) (cityoflaredo.com)