Mexico M&A Due Diligence

The same categories as a U.S. deal — corporate, labor, tax, real estate, intellectual property, contracts, and litigation — but with different weightings. Labor and tax carry disproportionate risk in Mexico because statutory employment entitlements accrue automatically and because invoicing practice can create exposure that is invisible in financial statements. Anti-corruption diligence on third parties matters more than in a purely domestic deal because FCPA successor liability follows the acquisition.

A share purchase transfers the entity with its full history, including liabilities you did not find. An asset purchase can leave some of that behind, but it is not the clean break U.S. buyers expect: Mexican substitution-of-employer rules can carry the workforce and its accrued entitlements with the business, permits are not always transferable, and the transfer of individual assets may carry its own tax cost. The right structure depends on what diligence surfaces, which is why the decision should stay open until the labor and tax picture is clear.

For a mid-sized target, four to eight weeks of substantive review once the data room is populated — with the caveat that Mexican data rooms are frequently incomplete at the start, and the gaps themselves are diligence findings. Registry searches, permit verification, and confirming the status of real property are done against public records rather than seller representations, and that verification is usually what sets the pace.

Accrued statutory severance and seniority premiums, unpaid or under-calculated profit sharing, social security contribution shortfalls, exposure from workers classified as contractors who function as employees, and any collective bargaining agreement in place. Because seniority runs continuously through a change of employer, the acquired workforce brings its full history rather than starting fresh — which is why labor diligence typically drives more purchase-price adjustment in Mexican deals than any other category.

Three things in parallel: remediate what diligence found while you still have leverage under the purchase agreement; align the acquired entity to your corporate standards for signing authority, compliance policies, and reporting; and assess the in-house legal team and outside counsel you inherited before renewing anything by default. Integration decisions deferred past the first quarter tend to harden into permanent exceptions.