Mexico supplier RFQ checklist: how to get comparable, cross-border-ready quotes
A request for quotation to a Mexican manufacturer looks like any other RFQ — until the quotes come back and you cannot compare them, or the attractive unit price turns into a landed cost that erases the savings. The fix is upstream: a cross-border RFQ has to ask for things a domestic one never does.
This page is a checklist for writing that RFQ, so quotes come back comparable and the cross-border reality is priced in rather than discovered after you commit.
Editorial note. This information is general and is not legal, tax, accounting, customs or procurement advice, nor a supplier recommendation. Verify any specific situation with official sources and qualified advisors. This site is an independent editorial resource operated by Heberey LLC; it does not represent the SAT, the Secretaría de Economía, VUCEM, Mexican Customs, or any chamber or authority.
Why a cross-border RFQ is different
A domestic RFQ can get away with part, volume, price and lead time. A cross-border RFQ that stops there will hide the costs that actually decide whether nearshoring pays off: customs treatment, logistics across the border, packaging for transport, lead-time variability and origin.
The goal of the checklist below is to compare landed cost, not unit price — and to make sure no supplier wins simply because they left more costs out of their quote.
What to specify in the RFQ
1. Product and technical scope
- Drawings, specifications, tolerances and revision level;
- materials, finishes and any required certifications;
- quality standard expected (e.g., ISO 9001, IATF 16949);
- inspection and acceptance criteria.
2. Commercial basis (so quotes are comparable)
| Specify | Why |
|---|---|
| Currency (USD or MXN) | Avoid normalizing currencies afterward |
| Incoterm (e.g., who delivers where) | Defines where each side’s cost responsibility ends |
| Annual volume and order pattern | Pricing depends on volume and variability |
| Quote validity period | Prices move; lock the basis |
3. Materials and tooling
- Who supplies materials — the supplier, or customer-supplied (consigned)?
- If consigned, can the supplier receive and track them under its IMMEX program?
- Who owns and pays for tooling, and where does it stay?
4. Cross-border cost elements
Ask the supplier to identify, even approximately:
- packaging for transport (cross-border handling is harder on packaging);
- logistics: freight, drayage, cross-docking, preferred crossing (see Mexico cross-border logistics);
- customs treatment and who acts as customs broker;
- expected duties, and whether USMCA rules of origin apply.
5. Lead time and reliability
- Standard lead time and its variability;
- capacity headroom for demand spikes;
- contingency for border delays.
6. Compliance and origin
- Is the product expected to qualify under USMCA?
- Who provides the certification of origin?
- Any regulated materials or non-tariff requirements?
Build a landed-cost comparison
Once quotes return, normalize them into a single landed-cost view:
| Cost element | Supplier A | Supplier B |
|---|---|---|
| Unit price (ex-works) | ||
| Packaging for transport | ||
| Freight + drayage | ||
| Customs + brokerage | ||
| Duties (after USMCA, if applicable) | ||
| Landed cost per unit |
The supplier with the lowest unit price is frequently not the one with the lowest landed cost. The RFQ exists to make that visible before you choose.
Red flags in the responses
- a unit price with no breakdown;
- silence on logistics or customs (“your broker handles it”);
- no clear answer on USMCA or certification of origin;
- lead times quoted with no variability;
- inability to handle consigned materials.
Recommended official sources
To verify trade and customs details, consult directly:
- the USMCA / T-MEC official text, for rules of origin and certification;
- the SAT, for the customs regime and duties;
- SNICE / Secretaría de Economía, for tariff and non-tariff information;
- and qualified advisors or customs brokers familiar with the specific operation.
Frequently asked questions
Why does an RFQ to a Mexican supplier need extra care?
Because a cross-border quote hides costs a domestic RFQ does not: customs treatment, logistics across the border, packaging for transport, lead-time variability and origin implications. If the RFQ does not ask for these explicitly, you get a low unit price and a surprise landed cost.
Should I ask for prices in USD or MXN?
Specify the currency and the incoterm so quotes are comparable. Mixing currencies and delivery terms across suppliers makes a fair comparison nearly impossible. State the basis up front rather than normalizing it afterward.
What is the difference between unit price and landed cost?
Unit price is what the supplier charges at the factory; landed cost adds packaging, freight, drayage, customs, duties and other border costs to your destination. Sourcing decisions should compare landed cost, not unit price, which is why the RFQ must surface those elements.
Should the RFQ mention USMCA?
If origin affects your duties, yes. Ask whether the product is expected to qualify under USMCA rules of origin and who will provide the certification of origin. Discovering an origin problem after you have committed is expensive.
How do I make quotes comparable across suppliers?
Use the same structure, currency, incoterm, volumes and assumptions for every supplier, and ask each to break down their quote the same way. Comparability comes from how you write the RFQ, not from how you read the answers.