Search Funds and Entrepreneurship Through Acquisition: A Cross-Border Guide for Mexican Investors

April 2026

Editorial update: September 6, 2026. This article reflects legal and regulatory authorities, administrative guidance, and market practice available as of the date above. Rules, thresholds, agency guidance, and administrative practice may change after that date, and the analysis may not apply the same way to every set of facts.

By Rene Hinojosa, Principal, Hiro Law. Licensed in Texas, California, and Mexico.

The search fund model offers a framework for Mexican investors evaluating U.S. lower-middle-market acquisitions. But for a Mexican national or family office using the model cross-border, the legal analysis changes materially at the levels of financing, entity selection, withholding, seller-note enforcement, and exit planning. This Insight focuses on the legal and tax issues that most often differentiate a cross-border acquisition from a domestic U.S. search-fund transaction.

Key Points

• SBA financing requires a complete eligibility and current-law check. The published 7(a)/504 notice imposes ownership, required-guarantor, residence and entity-organization tests, with a limited/supplemental-guaranty exception. Mexican nationality alone does not exclude a qualifying dual U.S. citizen. GAO has identified Congressional Review Act submission requirements; confirm subsequent legal status and lender requirements before relying on financing.

• U.S. tax classification does not, by itself, determine the Mexican tax result. A partnership-classified U.S. LLC can create U.S. filing and Section 1446 withholding obligations for foreign partners, while LISR Articles 4-A and 4-B apply Mexico's separate rules to foreign fiscally transparent entities and legal arrangements, including possible current recognition by a Mexican-resident owner. A U.S. C corporation ordinarily creates corporate and distribution tax layers, but a Mexican-resident owner may also face current REFIPRES inclusion under LISR Articles 176 and 177 if the effective-control and low-tax tests apply, even without a dividend. The active-business exception, passive-income threshold, foreign-tax-credit timing, treaty eligibility, and ownership chain must be tested from the actual facts. A Form 8832 election should not be assumed to control the Mexican characterization.

• QSBS should not be treated as a baseline U.S. tax benefit for a Mexican investor who remains a nonresident alien. Section 1202 does not impose a U.S.-person requirement on an eligible noncorporate taxpayer, but ordinary corporate-stock gain generally is foreign-source when the seller is a nonresident under Section 865 and therefore ordinarily falls outside the U.S. federal income-tax net. Separate analysis is required for effectively connected income, U.S. real-property interests under Section 897, and the tax-home and other sourcing exceptions in Section 865. Section 871's 183-day rule applies to net U.S.-source capital gain and does not, by itself, convert ordinary stock gain into U.S.-source income. Mexican worldwide-income taxation and foreign-tax-credit consequences must be modeled independently.

• Seller financing requires a coordinated cross-border collateral analysis. UCC Article 9 generally looks to the debtor's location for the law governing perfection, subject to collateral-specific exceptions; the physical presence of collateral in Mexico does not by itself mean a U.S. filing failed to perfect under U.S. law. Mexican law separately determines the recognition, priority, and enforcement available against Mexican assets. The required U.S. filings, Mexican security documents, RUG or special-registry filings, guarantees, and enforcement provisions depend on the debtor, collateral, governing law, and expected forum.

• The U.S.-Mexico income-tax treaty can affect several layers of the transaction, but its reduced rates depend on the recipient and payment category. Under Article 10, the 5% dividend ceiling applies only when the beneficial owner is a company that owns directly at least 10% of the payer's voting stock; the general treaty ceiling in other cases is 10%. A conditional exemption is available for certain corporate shareholders with an 80% holding for the required 12-month period ending on declaration and additional treaty qualifications. Under Article 11, the 10% interest category includes a qualifying credit sale of machinery or equipment, not every acquisition seller note, while the treaty ceiling for other interest generally is 15% unless another treaty category or domestic-law exemption applies. Articles 13 and 24 address capital gains and relief from double taxation, subject to domestic law, beneficial ownership, limitation-on-benefits rules, and documentation.

I. The Search Fund Model: A Brief Overview

A search fund is an investment vehicle in which one or two individuals (the “searchers”) raise capital from aligned investors to fund a full-time search for a privately held company to acquire. On identifying a target, the searcher raises acquisition capital, acquires the business and operates it. Search budgets, investor counts, target earnings and searcher equity are negotiated commercial terms. Equity may vest at closing, with continued service or against performance targets; no fixed percentage or tranche structure is a legal requirement. A target’s cash generation, succession needs and financing capacity matter more than a generic earnings band.

The IESE 2024 study covers 320 funds outside the United States and Canada through December 31, 2023; 71% of international searchers in its data held an MBA. Its 2022–2023 cohort reported median initial search capital of $456,000 (Exhibit 3). These are historical cohort statistics, not current Mexican market terms or a benchmark for every search.

II. Financing: The SBA Problem and Alternative Paths

a. The 2026 SBA policy change

SBA Procedural Notice 5000-876626, published February 11, 2026 with a stated March 1 effective date, imposes citizenship or U.S.-national status and principal-residence tests covering the United States, its territories and possessions on direct and indirect individual owners and SBA-required guarantors, plus organization requirements covering the United States, its territories and possessions for entity owners and guarantors. It treats lawful permanent residents as ineligible persons, but includes a limited/supplemental-guaranty exception for specified lender or jointly held collateral circumstances. Test the complete chain and the notice’s transition rules; Mexican nationality alone does not disqualify a dual U.S. citizen who otherwise qualifies.

GAO’s July 1, 2026 decision concludes that the relevant notices are rules subject to Congressional Review Act submission requirements before taking effect. That decision does not itself establish rescission or an injunction. Subsequent submission and court status must be confirmed with counsel and the lender before relying on the published policy or a claimed exception.

b. Alternative financing for the Mexican searcher

When the ownership structure does not qualify for SBA financing, the acquisition capital stack may include seller financing, investor equity, conventional bank debt, private credit, mezzanine financing, or a combination of those sources. Availability and terms depend on the borrower and guarantors, target cash flow, collateral, leverage, lender underwriting, currency exposure, and transaction structure. A seller note may bridge a financing gap, but its size, priority, subordination, covenants, collateral, withholding treatment, and cross-border enforcement provisions are transaction-specific.

III. Entity Selection for the Mexican Acquirer

a. C-Corporation vs. LLC

A Mexican national acquiring a US business through a search fund structure typically evaluates forming a US C-Corp or a US LLC as the acquisition vehicle. Each classification carries distinct cross-border tax consequences.

A C corporation may be considered when the acquisition structure calls for retained U.S. earnings, corporate-form investor rights, or potential Section 1202 eligibility. The corporation generally is subject to U.S. federal income tax, and distributions may produce a second shareholder-level tax or withholding layer. Under Article 10 of the U.S.-Mexico treaty, the 5% dividend-withholding ceiling applies when the beneficial owner is a Mexican-resident company that owns directly at least 10% of the payer's voting stock. The treaty ceiling generally is 10% in other qualifying cases, including an individual shareholder, subject to beneficial-ownership, limitation-on-benefits, documentation, and domestic-law requirements. Certain qualifying corporate shareholders may obtain the Article 10(3) exemption when they hold at least 80% of voting stock for the required 12-month period ending on the dividend declaration date and satisfy the additional eligibility routes, including limitation-on-benefits, ownership-history or competent-authority conditions. This is not automatic for a newly inserted holding company. See the Second Additional Protocol, Article II.

An LLC classified as a partnership (the default for a multi-member domestic LLC) generally is not itself subject to US federal income tax on partnership taxable income. Its partners take distributive shares into account, subject to partner-level rules. A partnership with effectively connected taxable income allocable to foreign partners generally must pay withholding under IRC §1446 at the highest applicable rate (currently 37% for noncorporate foreign partners and 21% for corporate foreign partners), and a foreign partner may have a US return obligation depending on its status and activities. Pass-through treatment is not administratively light for nonresident owners.

US-Mexico overlay. Mexico's REFIPRES regime (Régimen Fiscal Preferente) may require current inclusion of a Mexican resident shareholder’s proportional income under LISR Articles 176–177, even without a distribution, if (i) the Mexican resident has effective control over the US corporation, directly, indirectly, or together with related parties, and (ii) the effective tax actually paid on the relevant income is below 75% of the Mexican tax that would apply to the same income. For a Mexican corporate shareholder, this benchmark is commonly described as 22.5% (75% of the 30% corporate rate); for an individual taxed at 35%, the benchmark can be 26.25%. The 21% US federal corporate rate is therefore only the starting point: US state tax, credits, effective-rate computations, income character, and statutory exceptions can change the result. LISR Article 176 contains an exception for foreign entities carrying on business activities, unless passive income exceeds 20% of total income. The exception is unavailable where more than 50% of the foreign entity’s income is Mexican-source or has represented a deduction in Mexico, directly or indirectly. Apply the statutory income definitions and all conditions before relying on the exception. Additionally, the US entity classification election (Form 8832) may not change the entity's classification under Mexican tax law. Mexico does not have an equivalent check-the-box regime.

b. Holding company considerations

Some Mexican searchers interpose a Mexican holding company (HoldCo) between themselves and the US acquisition vehicle. Depending on the investor and governance facts, that structure may facilitate Mexican investor participation or centralize distributions, but it does not create treaty eligibility merely by adding an entity. Treaty residence, beneficial ownership, limitation-on-benefits, attribution, anti-abuse rules, and documentation must be tested for each payment. Related-party transactions between the HoldCo and a US OpCo must be priced consistently with applicable arm's-length rules, while the timing and form of transfer-pricing documentation depend on the taxpayer, transaction, and rules of each jurisdiction. The ownership chain may also affect potential QSBS eligibility.

Individual owners should separately assess U.S. estate and gift-tax exposure. Citizenship, transfer-tax domicile, asset classification and holding structure can change that analysis; income-tax residence alone does not resolve it.

c. Search fund investor structure

A cross-border search may draw U.S. and Mexican capital, with investor numbers and participation rights negotiated for the fund. Investor tax and withholding consequences depend on entity classification, income character, recipient tax status and documentation; foreign ownership alone does not subject distributions to a properly documented U.S. investor to nonresident withholding. Mexican investors must separately assess REFIPRES, treaty eligibility and SAT reporting.

Before soliciting search or acquisition capital, assess securities registration or an available exemption. Rule 506(b) generally bars general solicitation; Rule 506(c) permits it subject to all purchasers being accredited investors, reasonable verification and its other conditions. Review notice filings and any applicable investment-company or adviser requirements separately; do not assume every search vehicle has the same regulatory status. Offers in Mexico also warrant local review.

IV. QSBS Planning: The Mexican Tax Consideration

Section 1202 may be relevant when a noncorporate investor otherwise would be subject to U.S. federal income tax on qualifying stock gain, but it ordinarily should not be modeled as a benefit for a Mexican investor who remains a nonresident alien and whose stock gain is already outside the U.S. tax net. Where Section 1202 is relevant, the result depends on acquisition date, original issuance, holding period, shareholder status, issuer qualification, active-business requirements, and the investor's Mexican tax position. For stock acquired after July 4, 2025, current law provides phased exclusions after three, four, and five years, but Mexican worldwide-income taxation must be analyzed independently.

Current Section 1202 rules. Current law uses separate acquisition-date and issuance-date rules. For QSBS acquired after July 4, 2025, determined after applying Section 1223, the exclusion is 50% after at least three years, 75% after at least four years, and 100% after at least five years. The dollar component of the per-issuer limit generally is $15 million, subject to the same-issuer eligible-gain coordination in Section 1202(b)(4) and inflation adjustment for taxable years beginning after 2026; the 10-times-basis alternative remains available under Section 1202(b). The eligible-gain limit is applied before the exclusion percentage. QSBS acquired on or before July 4, 2025 remains subject to the prior more-than-five-year holding period and $10 million rules. Separately, the issuer's aggregate-gross-assets ceiling is $75 million for stock issued after July 4, 2025 and $50 million for stock issued on or before that date.

Buying existing target shares generally does not satisfy original issuance. Newly issued acquisition-vehicle stock requires its own original-issue, gross-assets and active-business analysis, including subsidiary/look-through rules and acquisition financing.

For a detailed analysis of QSBS technical requirements and cross-border traps, see Insights on QSBS tax planning.

V. The Treaty Layer

The US-Mexico Income Tax Convention can affect several layers of a cross-border search fund acquisition:

Article 7 (Business Profits). Business profits within Article 7 generally are taxable only in the enterprise’s country of residence unless it carries on business through a permanent establishment in the other country. Income governed by separate treaty articles retains that treatment under Article 7(7); treaty eligibility and the saving clause must also be considered.

Article 10 (Dividends). If the beneficial owner is a Mexican-resident company that owns directly at least 10% of the voting stock of the U.S. payer, Article 10 generally caps source-country dividend tax at 5% of the gross dividend. The treaty ceiling generally is 10% in other qualifying cases, including dividends beneficially owned by an individual. Treaty relief depends on residence, beneficial ownership, limitation-on-benefits requirements, and valid documentation such as Form W-8BEN or W-8BEN-E. Certain qualifying corporate shareholders may obtain the Article 10(3) exemption when they hold at least 80% of voting stock for the required 12-month period ending on the dividend declaration date and satisfy the additional eligibility routes, including limitation-on-benefits, ownership-history or competent-authority conditions. This is not automatic for a newly inserted holding company. See the Second Additional Protocol, Article II.

Article 11 (Interest). If the beneficial owner is a resident entitled to treaty benefits, Article 11 generally caps source-country tax at 4.9% for interest derived from loans granted by banks, including investment and savings banks, or insurance companies, and for qualifying regularly traded bonds or securities. A 10% ceiling applies to interest paid by a bank to a beneficial owner not covered by the 4.9% category and to interest paid by the purchaser of machinery or equipment to its original seller in a qualifying credit sale. Other interest generally falls within the treaty's 15% residual ceiling. A general seller note used to finance the acquisition of a business does not receive the machinery-and-equipment rate merely because it is seller financing. Article 11(4) also contains specified governmental, public-lending and pension exemptions. Domestic-law exemptions such as portfolio interest or qualifying bank-deposit interest require separate statutory analysis and documentation; related-party, back-to-back, effectively connected and excess-interest rules may change the result. See Article 11.

Article 13 (Capital Gains). Both countries may tax gains from the alienation of real property. Real-property interests and specified real-property-rich shares may also be taxed by the situs country. Other share disposals and substantial ownership positions engage separate Article 13 rules; test treaty allocation against domestic law and the seller’s ownership history.

Article 24 (Relief from Double Taxation). Article 24 and Mexican domestic law can permit relief for qualifying US tax on income also taxed in Mexico, subject to taxpayer status, source and characterization rules, credit limitations, timing, documentation, and other statutory conditions. If no qualifying US tax is imposed, including because a US exclusion applies, there may be no US tax available for a Mexican credit. The result must be modeled for the particular investor and income.

VI. Seller Financing: The Cross-Border Enforcement Gap

If a transaction uses seller financing, the note, collateral, guarantees, tax withholding, and enforcement mechanics require additional analysis when the debtor, guarantors, or assets span the United States and Mexico. SBA ineligibility may affect the available capital stack, but it does not determine the amount or availability of seller financing.

Perfection under an enacted version of UCC Article 9 generally follows the law of the debtor's location, subject to collateral-specific exceptions. A filing in the jurisdiction of a U.S.-located debtor therefore may perfect a security interest even when some collateral is physically in Mexico, but the effect, priority, recognition and enforcement in Mexico require separate analysis under the law applicable in the Mexican forum, including the property-situs rules in Federal Civil Code Article 13(III). Mexican-law collateral documents and RUG or real-property registrations may be required or advisable depending on the debtor, collateral, and enforcement forum. The U.S. and Mexican collateral packages should be coordinated rather than described as an invariably sufficient pair of simultaneous filings.

A U.S. monetary judgment is not directly executable against assets in Mexico. The creditor generally must obtain recognition or homologation and enforcement before a competent Mexican court under the procedural regime applicable in that forum. As of July 2026, the National Code of Civil and Family Procedure is entering into force gradually by federal or state declaration, no later than April 1, 2027, and proceedings already pending ordinarily continue under the law that governed when they began. Forum, service, finality, jurisdiction, public policy, and the location of assets can materially affect cost and timing.

VII. Due Diligence Additions for the Cross-Border Searcher

Tailor diligence to CFIUS jurisdiction and any mandatory declaration, applicable industry and state foreign-ownership restrictions, employment and I-9 transition duties, potential successor-employer exposure, and change-of-control provisions. Identify the requirements for the actual buyer, target and transaction rather than treating these topics as a universal filing list. The FinCEN final rule exempts U.S.-formed entities from federal BOI reporting and excludes U.S. persons from the specified foreign-company reporting requirements. Check applicable state reporting and bank due-diligence requirements independently of the federal BOI exemptions. BOI reporting should therefore be evaluated principally if the structure uses a foreign-formed entity registered to do business in a U.S. state, subject to the current foreign-reporting-company exemptions and deadlines.

For a detailed analysis of asset vs. stock deal structuring, see Insight on Structuring the Deal.

Common Questions

Can a Mexican national use SBA financing for a U.S. search-fund acquisition?

Under the published SBA policy, a nonqualifying owner can prevent eligibility; a dual U.S. citizen may qualify if the other tests are met. Review the complete ownership and guarantor chain, principal residence, entity organization, transition rules and limited/supplemental-guaranty exception. GAO’s Congressional Review Act decision means subsequent legal effect also requires verification. The notice and legal-status discussion in Section II should be checked with the lender and counsel for the particular application.

Should a Mexican searcher use a U.S. C corporation or an LLC for the acquisition vehicle?

The right vehicle depends on the investor mix, U.S. withholding and filing burden, Section 1202 eligibility, Mexican tax treatment, ownership chain, and exit plan. U.S. tax classification does not, by itself, determine the Mexican tax result. A partnership-classified U.S. LLC can create U.S. filing and Section 1446 withholding obligations for foreign partners, while LISR Articles 4-A and 4-B apply Mexico's separate rules to foreign fiscally transparent entities and legal arrangements, including possible current recognition by a Mexican-resident owner. A U.S. C corporation ordinarily creates corporate and distribution tax layers, but a Mexican-resident owner may also face current REFIPRES inclusion under LISR Articles 176 and 177 if the effective-control and low-tax tests apply, even without a dividend. The active-business exception, passive-income threshold, foreign-tax-credit timing, treaty eligibility, and ownership chain must be tested from the actual facts. A Form 8832 election should not be assumed to control the Mexican characterization.

How does seller financing change in a US-Mexico acquisition?

Seller financing requires a coordinated cross-border collateral analysis. UCC Article 9 generally looks to the debtor's location for the law governing perfection, subject to collateral-specific exceptions; the physical presence of collateral in Mexico does not by itself mean a U.S. filing failed to perfect under U.S. law. Mexican law separately determines the recognition, priority, and enforcement available against Mexican assets. The required U.S. filings, Mexican security documents, RUG or special-registry filings, guarantees, and enforcement provisions depend on the debtor, collateral, governing law, and expected forum.

Does QSBS planning solve the tax issue for Mexican investors?

Generally, no. Section 1202 should not be treated as a baseline U.S. tax benefit for a Mexican investor who remains a nonresident alien. Ordinary corporate-stock gain generally is foreign-source when the seller is a nonresident under Section 865 and therefore ordinarily falls outside the U.S. federal income-tax net. Separate analysis is required for effectively connected income, U.S. real-property interests under Section 897, and the tax-home and other sourcing exceptions in Section 865. Section 871's 183-day rule applies to net U.S.-source capital gain and does not, by itself, convert ordinary stock gain into U.S.-source income. Mexican worldwide-income taxation and foreign-tax-credit consequences must be modeled independently.

What extra diligence should a Mexican searcher add to a U.S. acquisition?

In a cross-border acquisition of a U.S. target by a Mexican buyer, diligence typically extends beyond a domestic deal. Common added items include financing eligibility (certain U.S. loan programs, such as SBA-backed financing, carry citizenship or residency conditions that can limit a non-U.S. buyer), CFIUS and industry-specific foreign-investment restrictions, any state-law restrictions on foreign ownership, employment and I-9 work-authorization exposure, change-of-control provisions in key contracts, and the enforceability of any seller financing against a foreign buyer. Beneficial-ownership (FinCEN) reporting can also arise, primarily where the acquisition uses a foreign-formed vehicle that registers to do business in a U.S. state, since U.S.-formed entities are presently outside that reporting regime. The tax analysis runs both ways: U.S.-Mexico treaty positions and withholding turn on the buyer's holding structure, and the same structure can expose a Mexican-resident buyer to Mexican worldwide-income taxation and controlled-foreign-company (REFIPRE) consequences. Which items apply, and how, depends on the deal structure, the target, and the jurisdictions involved; this is general information, not legal advice, the facts of each transaction drive the outcome, and counsel licensed in the relevant jurisdictions can advise on a specific deal.

Next Steps

Entity selection, financing structure, and treaty positions are interdependent and benefit from early analysis before signing a letter of intent, rather than after. Mexican founders and family offices evaluating US acquisitions through the search fund model may benefit from consulting with both US and Mexican counsel at the structuring stage.

Related Insights

For related analysis, see asset versus stock deal structure, seller financing in cross-border M&A, and U.S. entity selection for cross-border businesses. Readers evaluating an acquisition should consult a lawyer licensed in the relevant jurisdiction.

Responsible lawyer: Rene Hinojosa. Principal office: San Antonio, Texas.

This Insight is provided by Hiro Law for general informational and educational purposes only. It does not constitute legal, tax, investment, or other professional advice and should not be relied upon as such. No attorney-client relationship is created by your receipt of or access to this material. The information contained herein may not reflect the most current legal developments and is not guaranteed to be complete, correct, or up to date. You should not act or refrain from acting based on any information in this Insight without first seeking qualified counsel licensed in the relevant jurisdiction(s). Each cross-border transaction, investment, and compliance matter involves unique facts and circumstances that require individualized analysis. Prior results do not guarantee a similar outcome.