International Tax Due Diligence
in M&A Transactions
International tax advisory for buyers, sellers, and deal teams in cross-border mergers, acquisitions, and investments — identifying exposure, informing structure, and protecting value.
From FIRPTA analysis to CFC exposure, transfer pricing risk, and post-closing integration.
Cross-Border Transactions Introduce a Distinct Layer of International Tax Risk
Mergers and acquisitions involving foreign buyers, foreign targets, or cross-border business structures carry international tax issues that general M&A counsel and domestic tax advisors are often not equipped to identify. A foreign buyer acquiring a U.S. business with real estate may face FIRPTA withholding obligations that must be managed at closing. A U.S. buyer acquiring a foreign target with a multi-jurisdictional structure may inherit undisclosed CFC exposure, PFIC holdings, transfer pricing risk, or years of unfiled international information returns. A foreign-owned U.S. corporation may have unreported intercompany transactions, misclassified entities, or withholding tax obligations that create post-closing liability.
International tax due diligence is not a subset of general tax due diligence — it is a separate discipline that requires advisors who understand how the U.S. international tax framework applies to cross-border structures, and who know which issues to look for and how to evaluate their significance for deal value and deal structure. The goal is not simply to identify issues — it is to assess their magnitude, determine whether they are addressable in the transaction documents, and advise on the most tax-efficient structure for the deal.
We advise buyers, sellers, and their deal teams on the international tax dimensions of cross-border transactions — working alongside general M&A counsel and accounting advisors as the international tax specialist on the team. Our focus is the issues that arise at the intersection of U.S. international tax law and the specific cross-border facts of the transaction.
Who We Advise
Foreign Buyers Acquiring U.S. Businesses
Non-U.S. buyers and investors acquiring U.S. companies or assets — requiring FIRPTA withholding analysis, U.S.-situs asset classification, and structuring advice on how to hold the U.S. acquisition in a tax-efficient manner.
U.S. Buyers Acquiring Foreign Targets
U.S. buyers acquiring foreign businesses with cross-border structures — requiring CFC and PFIC analysis, transfer pricing review, entity classification, and assessment of the target’s international information return compliance history.
Foreign Sellers of U.S. Interests
Non-U.S. sellers disposing of U.S. real property, U.S. corporate stock, or partnership interests — requiring FIRPTA analysis, withholding certificate strategy, and treaty-based planning to minimize the tax cost of the disposition.
Private Equity & Family Offices
Investment funds and family offices with cross-border deal activity — requiring international tax due diligence support across portfolio acquisitions, dispositions, and restructurings with foreign elements.
M&A Counsel & Deal Teams
General M&A attorneys and deal teams who need a dedicated international tax resource to identify and analyze the cross-border tax issues in a transaction — and to advise on how those issues affect deal structure, representations, and indemnification.
International Tax Due Diligence — Issue by Issue
FIRPTA Analysis
Determination of whether the target is a U.S. real property holding corporation (USRPHC) — triggering FIRPTA withholding obligations for the buyer on the purchase price. Analysis of applicable exemptions, withholding certificate strategy, and treaty-based positions that may reduce or eliminate the withholding obligation.
CFC & NCTI Analysis
Identification of controlled foreign corporations in the target’s structure — including Subpart F income exposure, Net CFC Tested Income (NCTI), PFIC holdings, and assessment of whether the target’s CFC compliance history (Forms 5471) is current and complete.
Foreign Entity Classification
Analysis of the U.S. tax classification of each foreign entity in the target’s structure — identifying per se corporations, eligible entities, and existing check-the-box elections, and assessing whether current classifications are appropriate for the post-closing structure.
Transfer Pricing Review
Assessment of related-party intercompany transactions in the target’s cross-border structure — identifying transactions that may lack arm’s length pricing, reviewing transfer pricing documentation, and evaluating exposure to transfer pricing adjustments by the IRS or foreign tax authorities.
International Information Return Compliance
Review of the target’s international information return filing history — Forms 5471, 8865, 8858, 8621, 3520, FBAR — identifying missing or deficient filings and assessing the penalty exposure that may constitute a pre-closing liability or affect representations and warranties.
Foreign Tax Credit & NOL Analysis
Analysis of the target’s foreign tax credit position, foreign tax credit carryforwards, and net operating loss attributes — and assessment of how the transaction structure affects the usability of these tax attributes post-closing.
Tax Indemnity & Representation Review
Advisory on the scope of international tax representations, warranties, and indemnities in the purchase agreement — ensuring that cross-border tax exposures identified in due diligence are properly covered, with appropriate survival periods and indemnification baskets.
Representative Matters
Select anonymized engagements. Prior results do not guarantee a similar outcome.
TAX DUE DILIGENCE / FOREIGN BUYER — FIRPTA
United States / Latin America
Advised a foreign corporation acquiring a U.S. real property holding corporation on FIRPTA withholding obligations — including USRPHC determination, analysis of applicable exemptions and treaty-based reductions, structuring of the acquisition to minimize the withholding obligation, and advisory on the buyer’s withholding agent liability at closing.
TAX DUE DILIGENCE / U.S. BUYER — CFC STRUCTURE
United States / Europe
Advised a U.S. buyer on the international tax due diligence of a European target with a multi-jurisdictional holding structure — including CFC and NCTI analysis, entity classification review, assessment of the target’s Forms 5471 compliance history, and identification of transfer pricing exposure in related-party service arrangements between the target and its foreign subsidiaries.
TAX DUE DILIGENCE / RESTRUCTURING FOR ACQUISITION
United States / International
Advised on the pre-closing restructuring of a foreign-held U.S. operating business in connection with its acquisition by a U.S. buyer — including entity classification elections, rationalization of the cross-border holding structure, FIRPTA analysis on the transfer of U.S. real property interests held within the structure, and coordination of the restructuring steps with the closing timeline.
Frequently Asked Questions
What makes international tax due diligence different from general tax due diligence?
General tax due diligence focuses on income tax returns, open tax years, audit history, tax reserves, state and local tax exposure, and the treatment of specific transactions in the target’s tax return. International tax due diligence addresses a different set of issues: whether the target has foreign subsidiaries that are CFCs requiring Form 5471 filings; whether any foreign entities in the structure are classified correctly under U.S. check-the-box rules; whether the target has PFIC holdings; whether intercompany transactions are priced at arm’s length; whether FIRPTA withholding applies to the transaction; and whether the target’s history of international information return filings is complete. These issues require specialized international tax expertise that goes beyond what a domestic tax due diligence review covers — and the consequences of missing them can be material.
When does FIRPTA apply in an M&A transaction and what is the buyer's obligation?
FIRPTA withholding applies when a foreign person disposes of a U.S. real property interest (USRPI) — which includes not only direct ownership of U.S. real estate but also stock in a U.S. real property holding corporation (USRPHC). A USRPHC is a U.S. corporation whose U.S. real property interests equal or exceed 50% of the total fair market value of its business assets. In a stock acquisition of a USRPHC from a foreign seller, the buyer is required to withhold 15% of the purchase price and remit it to the IRS — even if the parties do not intend any FIRPTA withholding. The USRPHC determination must be made as part of due diligence. If it applies, the parties must decide whether to apply for a withholding certificate to reduce the withholding based on actual tax liability, whether to restructure the transaction, or whether a treaty-based exemption applies.
What CFC and international compliance issues should a buyer look for when acquiring a foreign target?
Several. First, identify all controlled foreign corporations in the target’s structure and confirm that Forms 5471 have been filed for each year and each category of filer. Missing or deficient Forms 5471 carry penalties of $10,000 per form per year — a potentially significant pre-closing liability that the buyer may inherit or that may affect representations and warranties. Second, analyze Subpart F income and NCTI exposure — the target’s U.S. shareholders may have been recognizing CFC income inclusions, or may have failed to do so, affecting the basis of CFC stock and the target’s tax return positions. Third, review entity classifications — a foreign entity that was classified incorrectly (or whose classification was never analyzed) may have been filing the wrong information returns or no returns at all. Fourth, assess transfer pricing — related-party intercompany transactions between the target and its foreign affiliates should be reviewed for arm’s length compliance.
How should international tax issues identified in due diligence be addressed in the purchase agreement?
International tax exposures identified in due diligence should be addressed through a combination of deal structure, representations and warranties, and tax indemnities. Specific international tax representations — covering CFC compliance, FIRPTA status, transfer pricing documentation, and international information return history — should be included in the purchase agreement and should survive closing for an appropriate period. Tax indemnities should extend to international tax liabilities, not just domestic income tax, and should be analyzed to confirm that they cover FBAR penalties, information return penalties, and foreign tax authority adjustments in addition to U.S. federal income tax. Purchase price adjustments or escrow arrangements may be appropriate where a specific international tax exposure has been identified but not fully quantified. The scope of international tax coverage in the purchase agreement should be tailored to the specific issues identified in due diligence.
International Tax Due Diligence Checklist for Cross-Border M&A
A practical guide for buyers, sellers, and deal teams covering the key international tax issues to investigate in a cross-border M&A transaction — from FIRPTA and CFC analysis through transfer pricing, international information return compliance, and purchase agreement coverage.
This checklist is provided for informational purposes only and does not constitute legal advice. No attorney-client relationship is formed by use of this resource. Every client’s situation is unique — this checklist does not substitute for a comprehensive analysis by qualified counsel. All engagements are subject to a conflicts check and execution of an engagement letter.