Mexico Transfer Pricing Policy

Mexico applies the arm’s-length principle to related-party transactions under its income tax law, administered by the Servicio de Administración Tributaria. The Mexican regime has a long history and an unusually heavy filing component: informative returns on related-party transactions are lodged annually, so the authority holds structured data on a taxpayer’s intercompany dealings rather than waiting for an audit to request it.

That filing weight is the defining practical feature. A Mexican taxpayer can be fully compliant on the arm’s-length substance and still exposed through a missed or inconsistent informative return, and the consequences of the filing failure are separate from any pricing adjustment.

Mexico’s manufacturing relationship with the United States also gives it a distinctive category of taxpayer: entities performing contract manufacturing for a foreign principal, for which Mexico has developed specific rules and administrative options. Those are a different analysis from an ordinary distributor or service provider and should not be documented on the same template.

Why this page quotes no figures

No Mexico figures appear on this page — no statute reference, no size threshold, no penalty, no due date. The mechanism is described instead. Mexico’s detail is revised often enough that a figure published today is a liability tomorrow, and in transfer pricing the client is the one who carries it. Every figure a live file depends on is confirmed against the Servicio de Administración Tributaria (SAT) for the relevant period at the time the work is done.

Mexican documentation follows the master file, local file and country-by-country shape for groups above the relevant thresholds, and it is accompanied by informative returns on related-party transactions filed annually. Which returns a given taxpayer files, and on what timetable, depends on its size and on the nature of its related-party dealings — and it is the question to settle first, because the filings drive the calendar.

The documentation itself is expected to support the arm’s-length nature of each related-party transaction with a functional analysis, a method selection and a comparability study. Because the informative returns already disclose the transactions and the methods, the file has to be consistent with what was filed rather than a separate account of the same year.

The specific thresholds, filing dates and penalty amounts are set in Mexican legislation and revised through the annual fiscal reform. We confirm those against SAT guidance for the year in question rather than quote a figure here — Mexican deadlines in particular have moved more than once.

The three-tier documentation shape

The documentation shape is close to universal because BEPS Action 13 designed it that way. A master file sets out the group — structure, intangibles, financing, how it makes its money. A local file covers this entity’s own controlled transactions and the reasoning behind each price. A country-by-country report shows administrations, jurisdiction by jurisdiction, where the revenue, the profit, the tax and the people sit. The OECD’s agreed threshold for the country-by-country report is EUR 750 million of consolidated group revenue, or a near equivalent amount in domestic currency as of January 2015 (OECD, Action 13 country-by-country reporting (oecd.org)) — the domestic-currency figure each jurisdiction legislated is its own, and is not stated here because it was not read here.

What we confirm before a Mexico file is signed off

• Which tiers of documentation are genuinely due for the period in front of us, checked against what SAT requires now — not against what it required when the last file was written.
• Whether every intercompany flow has been characterised — the recharge, the guarantee, the seconded employee and the loan are the ones routinely missing from the transaction list.
• That the paperwork tells one story — agreements, invoices, management accounts and the policy the file sets out, all saying the same thing about the same year.
• That the local narrative is consistent with what the group has already reported for Mexico anywhere else, because the authority sees both.

Mexico works from the OECD method set with a stated preference for the comparable uncontrolled price method where it can be applied, moving to the other methods where it cannot. That preference is a drafting instruction for the file: a Mexican analysis that begins with a net-margin study should say why a direct price comparison was unavailable. For entities performing contract manufacturing for a foreign principal, Mexico provides specific alternatives to a conventional benchmarking study, and choosing between them is a substantive decision rather than a formality.

The five methods in the OECD framework

Comparable uncontrolled price (CUP)

Prices the controlled transaction directly against a comparable transaction between independent parties. The most persuasive method where a genuine comparable exists, and the hardest to satisfy — small differences in product, volume, market or contractual term break comparability, so it is strongest on commodities, listed instruments and licences with published rates.

Resale price

Derives the transfer price by subtracting an arm’s-length gross margin from the resale price charged to an independent customer. Appropriate where the reseller does not transform the product, and unreliable where the comparison set performs a different mix of marketing, warranty or inventory functions.

Cost plus

Prices the transaction as cost plus the margin an independent supplier would have earned on the same work. Common on toll manufacturing and shared-service arrangements. Getting it right is an exercise in cost accounting discipline: the base has to be defined, consistent and reconcilable to the accounts.

Transactional net margin (TNMM)

Benchmarks the tested party’s net profit indicator against independent companies doing broadly similar work. It carries more documentation worldwide than the other four combined, precisely because it forgives product differences — and that is also its weakness, because the comparable search then does all the work.

Profit split

Splits the profit the controlled transaction produced between the participants on a basis reflecting their respective contributions. Used where a one-sided analysis cannot work — highly integrated operations, unique contributions on both sides, or risk that is shared rather than borne by one party.

The method matters less than the reasoning behind it. A Mexico file that shows which methods were considered, what data was available for each and why one was preferred is defending a decision; one that names a single method is defending an assumption.

A Mexico transfer pricing file is a piece of evidence before it is a piece of compliance, and it is read by someone looking for the gap between what the policy says and what the ledger did. That is the gap we work on first.

What a Mexico engagement covers

• Transaction mapping and delineation. Every related-party flow into and out of the Mexico entity, characterised and reconciled to the ledger, before any analysis begins.
• Functions, assets and risks. What the Mexico operation really does, who takes the decisions, and which risks it can actually control. Everything downstream depends on getting this right, and it is the part most files compress.
• Method selection, reasoned on the record. The method chosen for each tested transaction, with the alternatives considered and the reason each was set aside.
• Benchmarking you can audit. The search criteria, every screening decision and every comparability adjustment set out in full, so a reviewer reproduces the result rather than building their own.
• Documentation to SAT’s expected shape, consistent with the group’s master file and with what has been reported for Mexico elsewhere.
• Sourcing, stated. Each threshold, deadline and rate in the finished file is checked against the Servicio de Administración Tributaria (SAT) for the relevant period. Where we cannot confirm a figure, the file explains the mechanism and gives no number.

Advance certainty and dispute resolution

Mexico offers advance pricing arrangements and the mutual agreement procedure under its treaty network, and it has a domestic administrative appeal route. Given the volume of Mexico-US related-party trade, the bilateral route is well used, and the Mexican file’s consistency with the US file is what makes it workable.

How we work

The fee is agreed in writing before any work starts, and you review the result before anything is filed. Where your Mexico entity sits relative to our offices makes no difference to how the file gets built. If you want to talk it through first, the helpline answers 24 hours a day and there is no obligation attached to a call — contact us or read our transfer pricing service page for what a full engagement includes.

The direction of travel in Mexico is the same as everywhere else, and it is worth naming plainly. Authorities exchange country-by-country data, so a group's own reported allocation of profit arrives before any question is asked. Financing and intangibles now generate most adjustments. And a file produced late is treated differently from a file produced on time, whatever it contains.

Where challenges concentrate in Mexico

• Informative return accuracy is a compliance risk in its own right. A return that discloses a method the documentation does not support, or omits a related-party transaction the file describes, creates a contradiction the taxpayer authored.
• Contract manufacturing arrangements for a foreign principal need the local entity’s return on its assets and functions to reflect what it actually does, including who owns the inventory and the machinery. Those facts are often not what the intercompany agreement says.
• Deductions for payments to related parties abroad are examined for whether the service or right was genuinely received and used in Mexico. A charge that cannot be traced to a benefit in the Mexican operation is the routine disallowance.

What it costs when the file is not there

The cost of a thin file in Mexico is rarely just the tax. It is the adjustment, the charge or penalty attached to it, the years it stays open, the management time an audit consumes, and the corresponding position in the counterparty jurisdiction that may not be relieved. Priced against that, the documentation is the cheap part.

By business size

Owner-managed group

A Mexican company with a single foreign affiliate is inside the arm’s-length rule and, depending on size, inside the informative return regime. The filings arrive before the audit does.

Mid-market group

Several related-party flows mean several tested transactions, and every one of them shows up on an informative return that has to match the file.

Multinational group

Master file, local file and country-by-country reporting engage together, and for a US-facing group the Mexican and US files have to be one story.

By industry

Automotive and manufacturing

Contract and toll manufacturing for a foreign principal is the dominant Mexican pattern, and the asset and inventory ownership facts drive the analysis.

Retail and consumer goods

Imported related-party goods plus brand royalties into Mexico create two priced flows that need separate testing.

Services and shared centres

Cross-border service charges into and out of Mexico are examined for receipt and benefit, and the documentation has to evidence delivery rather than allocation.

None of these is a template. Two companies in the same sector with the same Mexico turnover can need entirely different files, because the transfer pricing question follows the group structure and the intercompany agreements rather than the industry. The sector tells you where to look first; the agreements tell you what the answer is.