Mexico Corporate Tax for Foreign Companies: What You Will Actually Pay.

Mexico's corporate tax regime is not unreasonable. It is, however, layered in ways that surprise foreign companies who arrive expecting a single rate and discover a system of overlapping obligations: corporate income tax, value-added tax, mandatory profit sharing, withholding taxes on cross-border payments, and transfer pricing rules that the tax authority enforces with increasing rigour. Understanding the full picture before you commit capital is not optional. It is the difference between a viable operation and a margin-destroying surprise.

This guide covers what foreign companies actually pay, not the headline rate, but the effective tax burden across all obligations.

Corporate income tax: 30% flat rate

Mexico levies a flat 30% corporate income tax (Impuesto Sobre la Renta, or ISR) on net taxable income. This rate applies equally to domestic and foreign-owned companies. There are no graduated brackets, no small business rate, and no sector-specific reductions outside of designated incentive programs.

The 30% rate is competitive within Latin America (Brazil's effective corporate rate exceeds 34%, Colombia sits at 35%) but higher than the US federal rate of 21%. The effective rate after deductions and credits varies, but 30% on net income is the baseline that every financial model must accommodate.

All Mexican entities must file annual tax returns with the Servicio de Administración Tributaria (SAT), Mexico's tax authority. Monthly provisional tax payments are required, calculated on a cumulative basis. The SAT has invested heavily in digital enforcement infrastructure, including mandatory electronic invoicing (CFDI) that creates a real-time audit trail for every transaction.

VAT (IVA): 16% standard, 0% for exports

Mexico's value-added tax, known as IVA (Impuesto al Valor Agregado), is levied at 16% on the sale of goods, provision of services, temporary use of goods, and importation of goods and services. The northern border zone benefits from a reduced rate of 8% for certain transactions, though this incentive has been subject to periodic review.

Critically, exports are taxed at 0%. This means exporters can recover all IVA paid on inputs through monthly refund claims, effectively making Mexico a zero-VAT manufacturing platform for export-oriented operations. The refund process, however, is not instantaneous. SAT audits IVA refund claims rigorously, and processing times of 40 to 60 days are standard. Larger claims may trigger detailed audits that extend the timeline to 90 days or more.

For companies operating under the IMMEX program, a certification scheme (Certificación IVA/IEPS) allows virtual rather than physical payment and refund of IVA on temporary imports, significantly improving cash flow.

PTU: mandatory profit sharing

This is the obligation that most surprises foreign companies. Mexico's Federal Labour Law requires all employers to distribute 10% of pre-tax profits to employees as PTU (Participación de los Trabajadores en las Utilidades). This is not discretionary. It is a constitutional mandate.

The 2022 labour reform capped individual PTU payments at the greater of three months' salary or the average PTU payment over the previous three years. This cap was a significant relief for capital-intensive companies that previously faced PTU distributions disproportionate to individual wages.

PTU is calculated on the same taxable income base as corporate income tax, with certain adjustments. It is deductible for ISR purposes in the year it is paid. Companies in their first year of operations are exempt. Companies that report a fiscal loss are exempt for that year.

For a company with $5 million in pre-tax profits and 200 employees, the PTU obligation before the cap could reach $500,000, distributed based on a formula that weights both salary and days worked. After the cap, the actual distribution is typically lower, but the obligation remains material and must be modelled in any Mexico financial projection.

Withholding taxes on cross-border payments

Foreign companies operating through Mexican subsidiaries will inevitably repatriate profits, pay management fees, license intellectual property, or service intercompany debt. Each of these cross-border payments triggers Mexican withholding tax obligations.

Dividends paid to foreign shareholders are subject to a 10% withholding tax on distributions from profits generated after 2014. An additional ISR adjustment may apply if the distributing company has not paid corporate ISR on the profits being distributed.

Interest payments to foreign lenders are subject to withholding at rates ranging from 4.9% (for qualified bank debt from treaty countries) to 35%, depending on the nature of the creditor and the applicable tax treaty. The Mexico-Canada tax treaty and the Mexico-US tax treaty reduce withholding rates on interest to 10% in most cases.

Royalties paid to foreign licensors are subject to withholding at rates ranging from 5% to 35%, depending on the type of intellectual property and the applicable tax treaty. The Mexico-Canada treaty caps royalty withholding at 10% for most categories.

Management and technical service fees are subject to 25% withholding unless reduced by treaty. Careful structuring of intercompany service agreements is essential to minimize this burden.

Transfer pricing: the SAT is watching

Mexico's transfer pricing rules follow OECD guidelines, requiring that intercompany transactions be conducted at arm's length. The SAT has significantly increased its transfer pricing audit activity in recent years, focusing particularly on maquiladora operations, intercompany service charges, and intellectual property licensing arrangements.

Companies must prepare and maintain contemporaneous transfer pricing documentation, including a master file, local file, and country-by-country report (for groups with consolidated revenue exceeding 12 billion Mexican pesos, approximately $600 million USD). The penalty for non-compliance with documentation requirements is severe: adjustments to taxable income, plus surcharges and fines.

For manufacturing operations, the SAT applies specific benchmarks. Maquiladora operations must report taxable income of at least 6.9% of total assets or 6.5% of total costs plus expenses, whichever is greater. This is the maquiladora safe harbour, and it effectively sets a floor on the profitability that must be reported in Mexico.

Tax treaties: reducing the double burden

Mexico has an extensive network of double taxation treaties, including with the United States, Canada, and most major European economies. These treaties reduce withholding tax rates and provide mechanisms for resolving disputes where both countries claim taxing rights over the same income.

The Mexico-Canada tax treaty is particularly relevant for Canadian companies operating in Mexico. It reduces withholding on dividends to 10% (5% for corporate shareholders holding 10% or more of voting stock), interest to 10%, and royalties to 10%. It also provides protection against double taxation through foreign tax credits.

IMMEX tax benefits

Companies operating under the IMMEX program enjoy significant tax advantages, as we detailed in our IMMEX guide. Temporary imports of raw materials, components, and machinery are exempt from import duties and IVA (with certification). The program effectively creates a tax-efficient manufacturing platform for export-oriented operations.

Combined with the maquiladora safe harbour rules, IMMEX allows foreign manufacturers to operate in Mexico with a predictable and manageable tax burden, provided the entity structure and transfer pricing are properly established from day one.

Common pitfalls for foreign companies

Permanent establishment risk. Foreign companies that conduct business activities in Mexico without a formal entity may inadvertently create a permanent establishment, triggering full Mexican tax obligations on the income attributable to that presence. Sales representatives, technical support personnel, or decision-making authority exercised from Mexico can all create PE exposure. We addressed entity structuring in our entity structure guide.

Thin capitalization. Mexico's thin capitalization rules limit the deductibility of interest on related-party debt to a 3:1 debt-to-equity ratio. Interest on excess debt is non-deductible. Companies that fund Mexican operations primarily through intercompany loans must structure their capitalization carefully.

CFDI compliance. Every transaction in Mexico, whether a sale, a purchase, a payroll payment, or an expense reimbursement, requires a CFDI (Comprobante Fiscal Digital por Internet). Non-compliance renders expenses non-deductible and can trigger penalties.

Underestimating the SAT. Mexico's tax authority has modernized rapidly. Digital invoicing, real-time transaction matching, and data analytics have given the SAT enforcement capabilities that rival any developed economy. The days of informal tax practices are over.

Planning before committing

Mexico's tax regime is manageable when it is understood, modelled, and planned for. It becomes problematic when companies enter without a clear picture of the full obligation set. The combination of 30% ISR, 16% IVA, 10% PTU, withholding taxes, and transfer pricing compliance creates a total tax environment that demands professional guidance.

We work with foreign companies to model the full tax picture before entry, structure entities to minimize the effective burden, and ensure compliance from day one. If you are evaluating Mexico and want to understand what you will actually pay, our team can walk you through it.

If this raises questions about your own Mexico strategy, we are here to talk.