A European technology group licenses proprietary software to its US subsidiary. The royalty rate is set internally, approved by the board, and consistent with prior-year filings. Then the Internal Revenue Service opens an examination. Within months, the group faces a proposed adjustment running into tens of millions of dollars – plus substantial penalties and compounding interest. The pricing that seemed defensible at a board meeting looks entirely different under IRS scrutiny.
Transfer pricing disputes in the United States arise when the IRS challenges the prices charged between related parties in cross-border transactions. Asserting that those prices deviate from the arm's length standard embedded in US tax legislation. The IRS may reallocate income between a foreign parent and its US affiliate, issue a notice of deficiency, and impose accuracy-related penalties on top of the primary adjustment. International groups that lack contemporaneous documentation and a defensible economic analysis face the highest exposure.
This analysis covers the doctrinal foundation of US transfer pricing law, the IRS enforcement posture, competing judicial interpretations, the gap between statutory requirements and administrative practice. Cross-border considerations for clients operating across the Americas. Additionally, strategic options for building an effective defence.
The doctrinal foundation: arm's length in US tax legislation
US tax legislation grants the IRS broad authority to reallocate income, deductions, and credits between related parties. The operative standard is the arm's length principle: transactions between controlled entities must reflect the prices that unrelated parties would agree to under comparable circumstances. This principle sits at the centre of the US transfer pricing regime and has shaped enforcement since the mid-twentieth century.
US Treasury regulations implementing this standard are among the most detailed in the world. They prescribe a hierarchy of methods for different transaction categories: comparable uncontrolled price, resale price, cost plus, comparable profits method, profit split, and unspecified methods. No single method is universally mandated. Instead, the regulations require taxpayers to use the "best method" – the one that produces the most reliable measure of an arm's length result given the facts and circumstances.
The best method rule is where doctrinal clarity ends and practical complexity begins. "Best method" is not defined by a bright-line test. It depends on the comparability of available data, the reliability of assumptions, and the nature of the controlled transaction. Two tax advisers can review the same intercompany arrangement and reach different conclusions on which method applies. The IRS frequently disagrees with the method chosen by the taxpayer – and that disagreement is the seed of most transfer pricing disputes.
Practitioners in the United States note that the regulations also impose a contemporaneous documentation requirement. A taxpayer that cannot produce documentation prepared before the return is filed faces a rebuttable presumption that its pricing was not arm's length. That presumption, if not rebutted, exposes the taxpayer to penalties on top of any primary adjustment. The documentation requirement is therefore not a formality – it is the first line of defence.
Under US tax legislation governing corporate income tax, related-party transactions must also account for cost-sharing arrangements for intangible development. The IRS has used cost-sharing rules aggressively in disputes involving technology and pharmaceutical groups. A key contested issue is the valuation of platform contribution transactions – the buy-in payment a foreign party must make when joining an existing cost-sharing arrangement. Courts have addressed these disputes repeatedly, and the case law reveals significant tension between the IRS position and the taxpayer's economic analysis.
IRS enforcement posture: examination, adjustment, and penalty
The IRS Large Business and International division leads transfer pricing examinations. It has dedicated transfer pricing specialists – economists and engineers embedded in examination teams – who analyse controlled transactions in depth. When the IRS identifies a pricing issue, it issues an Information Document Request. These requests are detailed and time-consuming. A typical examination of a multinational group's intercompany transactions can last two to four years.
At the conclusion of an examination, the IRS issues a Revenue Agent Report. This document sets out the proposed adjustment, the method the IRS believes should apply, and the penalty computation. The taxpayer then has an opportunity to respond before the matter proceeds to IRS Appeals.
IRS Appeals is an independent office within the IRS. It reviews disputed adjustments on a hazards-of-litigation basis. This means that Appeals considers both parties' litigation risk. Settlements are common at the Appeals stage, particularly where the taxpayer has strong documentation and a credible economic analysis. A taxpayer that enters Appeals without documentation, or with an analysis prepared after the examination began, is in a significantly weaker position.
If Appeals cannot resolve the dispute, the IRS issues a statutory notice of deficiency. commonly called a "90-day letter." The taxpayer must then either pay the assessed tax and sue for a refund in the US District Court or the US Court of Federal Claims. Alternatively. Petition the US Tax Court without paying the tax first. The Tax Court path is the most common for transfer pricing disputes of significant size, because it allows the taxpayer to litigate without first funding a large payment.
Penalties in transfer pricing cases operate on a tiered basis. The standard accuracy-related penalty applies where the underpayment exceeds a threshold. An enhanced penalty applies where the adjustment is very large relative to the correct tax. Both penalties can be avoided if the taxpayer establishes reasonable cause and good faith. In practice, contemporaneous documentation that meets the regulatory standard is the most reliable basis for a penalty defence. A taxpayer that produced compliant documentation before filing the return has a strong argument that it acted in good faith, even if the court ultimately agrees with the IRS on the primary adjustment.
The IRS has also used its summons authority to compel production of documents held by foreign affiliates. Where a foreign parent refuses to produce documents located outside the United States, the IRS may seek enforcement of the summons in US federal court. Courts have generally upheld IRS summons authority in this context, creating significant pressure on foreign groups to cooperate during examinations.
To discuss how the IRS examination process applies to your group's intercompany transactions, contact us at info@ferrazwhitmore.com.
Competing judicial interpretations: where courts have drawn the lines
US transfer pricing litigation has produced a substantial body of case law. Several recurring disputes illustrate the tensions between the IRS position and the interpretations accepted by courts.
The first recurring issue is the valuation of intangibles transferred between related parties. US tax legislation contains a "super-royalty" provision requiring that compensation for intangible transfers reflect the actual productivity, value, or use of the intangible over time. The IRS has interpreted this provision broadly, arguing that the arm's length price for a transferred intangible should be based on the intangible's anticipated future value. not its value at the time of the transfer. Courts have at times accepted this approach, at times rejected it, and at times endorsed a modified version that allows for periodic adjustments if actual results diverge significantly from projections. The result is that intangible valuations remain among the most contested issues in US transfer pricing litigation.
The second recurring issue is functional analysis. The arm's length standard requires a comparison between the controlled transaction and comparable uncontrolled transactions. But the comparability analysis depends on an accurate characterisation of the functions performed, risks assumed, and assets employed by each related party. The IRS and taxpayers frequently disagree on this characterisation. A US subsidiary that the IRS characterises as a full-fledged distributor – bearing market risk, holding inventory, and deploying significant assets – will be expected to earn a distributor's return. If the taxpayer characterises the same entity as a limited-risk distributor, the expected return is lower. The difference can be substantial.
Courts in the United States have emphasised that the functional characterisation must be grounded in economic substance, not merely in contractual allocation of risk. Where the contractual risk allocation is not supported by the conduct of the parties. specifically. Whether the party bearing the risk has the financial capacity and operational control to manage it. courts have sided with the IRS in reassigning the risk. This principle aligns with the OECD transfer pricing approach, which the United States formally endorses, though US regulations remain the primary source of law in domestic proceedings.
The third recurring issue is the use of secret comparables. The IRS has, in some examinations, relied on comparable data that it did not disclose to the taxpayer during the examination. Courts have generally required the IRS to disclose comparables it intends to rely on at trial. However, the issue resurfaces because the IRS may access data through its examination authority that is not publicly available. Taxpayers should be prepared to challenge any comparable data that the IRS introduces at a late stage without prior disclosure.
A fourth area of judicial scrutiny involves cost-sharing buy-in valuations. Courts have addressed whether the IRS can impose its own valuation methodology for platform contribution transactions when the taxpayer's methodology was applied consistently and in good faith. The case law suggests that courts will not automatically defer to the IRS's preferred methodology. Where the taxpayer's method falls within a reasonable range of arm's length outcomes, courts have declined to uphold IRS adjustments in full, even if the court believed the IRS method was also reasonable.
These judicial outcomes collectively reinforce a central strategic point: the strength of a transfer pricing defence is determined primarily by the quality of the economic analysis and the robustness of the documentation. Not merely by the legal arguments advanced at trial.
For a detailed review of the corporate law considerations that intersect with US transfer pricing structures. including the use of a Delaware LLC (a limited liability company formed under Delaware corporate legislation. Widely used in cross-border structures). see our analysis of corporate law matters in the United States.
The gap between statute and practice: what the regulations do not tell you
The written rules of US transfer pricing law are extensive. The gap between those rules and what actually happens in an examination and dispute is equally significant. Several aspects of practice diverge meaningfully from what a statutory reading would suggest.
First, the IRS examines transfer pricing positions not in isolation but as part of a broader examination strategy. An IRS team examining a multinational group will typically identify transfer pricing as one of several issues. The final settlement at Appeals often reflects a package resolution across multiple issues. A taxpayer that has strong positions on some issues and weaker ones on others may accept an adjustment on transfer pricing in exchange for concessions on other items. This trading dynamic is real but rarely discussed in academic treatments of the subject.
Second, the Advance Pricing Agreement programme – known as APA – offers a route to certainty that the statute does not make obvious from its text alone. A taxpayer can negotiate a binding agreement with the IRS specifying the transfer pricing methodology that will apply to future transactions. Bilateral APAs, agreed between the IRS and a foreign tax authority under the applicable tax treaty, also eliminate the risk of double taxation. The APA process typically takes one to three years. It requires significant upfront investment in economic analysis and negotiation. For groups with high-volume, recurring intercompany transactions, an APA is frequently the most cost-effective long-term solution.
Third, the Mutual Agreement Procedure available under US tax treaties provides a separate channel for resolving double taxation that arises from a transfer pricing adjustment. Where a foreign tax authority imposes its own adjustment that conflicts with the IRS position, the competent authority processes under the relevant tax treaty allow the two governments to negotiate a resolution. This process can take several years and does not always produce a complete resolution. However, it is the primary mechanism for avoiding economic double taxation on the same income – and international groups should invoke it promptly when a double-taxation risk materialises.
Fourth, the role of withholding tax must be considered in the defence strategy. A transfer pricing adjustment that recharacterises a royalty payment as a deemed dividend, for example, can trigger withholding tax obligations at source. If the payment originated in a jurisdiction covered by a US tax treaty, the withholding tax rate may be reduced. But treaty benefits are not automatic. The payer must satisfy tax residency requirements and, in some cases, meet limitation-on-benefits tests embedded in the treaty. A defence strategy that focuses exclusively on the primary income adjustment without analysing the withholding tax consequences may produce an unexpected secondary liability.
Fifth, the concept of permanent establishment interacts with transfer pricing in ways that can compound a taxpayer's exposure. Where the IRS determines that a foreign group has a permanent establishment in the United States. for example. Through the activities of a dependent agent or through the fixed-place-of-business rules. it may assert that income attributable to that permanent establishment has been underreported. The transfer pricing adjustment and the permanent establishment assertion can reinforce each other, dramatically expanding the proposed deficiency. International groups whose US operations include sales agents, commissionnaires, or seconded employees should assess their permanent establishment exposure as part of any transfer pricing review.
For a complementary perspective on how transfer pricing disputes are handled in a major South American jurisdiction. See our analysis of transfer pricing disputes in Brazil. This examines a civil law approach that diverges significantly from US practice.
Cross-border implications for Americas clients
International groups headquartered in Latin America face a specific set of risks when their US operations are examined. Several structural patterns common in cross-border Americas transactions attract IRS attention.
The first pattern is the use of a holding company in a low-tax jurisdiction to route royalties or service fees into the United States. The IRS will examine whether the holding company has genuine economic substance – employees, decision-making authority, and assets – sufficient to support the functions and risks that justify the royalty or fee. Holding companies that exist primarily on paper, with management concentrated elsewhere, are vulnerable to a substance-over-form challenge under US tax legislation.
The second pattern involves intercompany loans between a US subsidiary and a foreign parent or affiliate. The IRS will scrutinise the interest rate applied. Under the applicable safe-harbour rules, interest rates within a specified range are presumed arm's length. Rates outside that range require independent justification through comparable market data. Where a US entity has been capitalised primarily with debt from a related foreign party, the IRS may also apply earnings-stripping rules that limit the deductibility of the interest expense. These rules interact with transfer pricing principles and can produce an unexpected increase in US corporate income tax.
The third pattern concerns the allocation of costs between the US entity and its foreign affiliates. Management fees, shared services charges, and IT cost allocations are frequently examined. The IRS will require that the charge reflects the actual benefit received by the US entity and that the amount is consistent with what an unrelated party would pay for comparable services. Generic or formulaic cost allocations that lack economic support are a common source of adjustment.
Latin American groups operating in the United States also face a documentation challenge. Transfer pricing documentation prepared under local rules in Brazil, Mexico, Colombia, or Argentina may not satisfy the US contemporaneous documentation standard. A group that relies solely on documentation prepared for its home jurisdiction may find that its US filing position is unprotected. Separate, US-compliant documentation should be prepared for each year in which controlled transactions occur.
The interaction between US transfer pricing adjustments and the tax treaty network also deserves attention. The United States maintains tax treaties with a number of Latin American jurisdictions. These treaties include provisions governing the tax residency of entities, the allocation of taxing rights over business profits, and the Mutual Agreement Procedure for resolving double taxation. Where a US adjustment produces double taxation, the treaty competent authority process is the primary remedy. However, not all Latin American jurisdictions have treaties with the United States, and where no treaty applies, the risk of unrelieved double taxation is real.
For international groups assessing the full scope of their US tax exposure. including how transfer pricing intersects with their broader US operations. a review of tax law advisory for the United States provides a structured starting point.
To receive an expert assessment of your group's transfer pricing position in the United States, contact us at info@ferrazwhitmore.com.
Strategic recommendations: building an effective defence
A transfer pricing defence is built over years, not assembled at the point of examination. The following strategic considerations apply across the lifecycle of a cross-border intercompany arrangement.
Documentation as a primary investment. Contemporaneous documentation is the single most important element of a transfer pricing defence. It should be prepared annually, before the tax return is filed. It should describe the controlled transactions, the method selected, the comparables used, and the analysis supporting the conclusion that the prices are arm's length. Documentation that is thin, internally inconsistent, or prepared after the examination begins is significantly less effective. The cost of producing strong documentation is a fraction of the exposure created by an unchallenged IRS adjustment.
Functional analysis precision. The characterisation of each entity in a controlled transaction must be grounded in operational reality. If a US entity performs functions that go beyond a limited-risk distributor, its documentation should reflect and explain those functions. If the contractual allocation of risk is not supported by the actual conduct of the parties, the documentation should address this directly. Unexplained gaps between contract terms and operational behaviour are exploited effectively by IRS examiners.
Economic analysis quality. The economic analysis supporting a transfer pricing position should be conducted by qualified economists with access to appropriate databases of comparable transactions. The comparable search should be documented in detail. Where the selected method produces a range of arm's length outcomes, the taxpayer's price should fall within that range. Prices at the edges of the range – or outside it – require additional justification. Where the comparable data is limited or unreliable, the analysis should acknowledge this and explain why the chosen approach is nonetheless the best available method.
APA as a proactive tool. For groups with significant recurring intercompany transactions, an Advance Pricing Agreement removes the uncertainty created by a retrospective examination. A bilateral APA – agreed between the IRS and the relevant foreign competent authority – also provides protection against double taxation. The APA programme requires a substantial upfront investment, but it eliminates examination risk for the covered transaction types during the agreement period, which typically runs five years and can be renewed.
Managing the examination strategically. Once an examination begins, the taxpayer's response to Information Document Requests should be coordinated carefully. Producing documents without organisation or context can create additional issues. Privileged communications – including communications with counsel regarding legal strategy – should be identified and protected from the outset. The scope of the examination should be monitored to ensure it does not expand beyond the issues identified in the opening conference.
Appeals and litigation readiness. If the matter proceeds to IRS Appeals, the taxpayer should present its position with the same rigour it would apply in litigation. Appeals officers are experienced professionals who evaluate hazards of litigation. A presentation that is thorough, well-documented, and realistic about the weaknesses of the taxpayer's position is more likely to produce a reasonable settlement than one that overstates the taxpayer's case. Where settlement is not possible, the US Tax Court provides a forum for full judicial review. Tax Court judges have extensive experience with transfer pricing disputes, and the court has developed a substantial body of analysis on methodology and comparability issues.
When evaluating whether to litigate, the economics matter as much as the legal merits. The direct cost of Tax Court litigation – including expert economists, counsel fees, and management time – must be weighed against the proposed adjustment, the penalty exposure, and the probability of prevailing on each issue. A realistic assessment of those variables, conducted early in the dispute, is the foundation of an effective strategy.
Frequently asked questions
Q: How long does a transfer pricing dispute with the IRS typically take to resolve?
A: An IRS transfer pricing examination can last two to four years before a formal notice of deficiency is issued. If the matter proceeds to the US Tax Court, resolution may take an additional one to three years. Taxpayers who elect the Advance Pricing Agreement programme can secure prospective certainty within one to three years of filing, avoiding litigation entirely.
Q: Is it a misconception that a Delaware LLC always avoids US federal income tax on cross-border income?
A: Yes. A common misconception is that a Delaware LLC structure automatically shields a foreign group from US corporate income tax. The IRS will examine whether the entity constitutes a permanent establishment, whether income is effectively connected with a US trade or business, and whether the intercompany pricing reflects arm's length terms. The LLC form does not itself neutralise those risks.
Q: What does a transfer pricing defence strategy typically cost for a mid-size international group?
A: Professional fees for a transfer pricing defence. including economic analysis, documentation preparation. Additionally. Legal representation. typically run into the tens of thousands to hundreds of thousands of dollars depending on transaction complexity and the number of years under examination. These costs are generally far lower than the penalties and interest that accrue on an unadjusted deficiency, making early investment in documentation and qualified counsel highly cost-effective.
About Ferraz & Whitmore
Ferraz & Whitmore is an international law firm based in Lisbon, advising business clients across 46 jurisdictions. Our tax law practice supports multinational groups, institutional investors, and in-house legal teams facing transfer pricing disputes, IRS examinations, and cross-border tax structuring challenges in the United States and across the Americas. We combine Portuguese civil law expertise with English common law tradition to deliver transfer pricing defence strategies that work across both legal systems. The firm's tax team has advised on transfer pricing matters before the US Tax Court, through IRS Appeals, and in Mutual Agreement Procedure proceedings under US tax treaties. Our Lisbon base provides direct access to European and EU regulatory regimes, while our common law expertise supports litigation and arbitration strategies in US federal court. Ferraz & Whitmore participates in cross-border practice groups focused on international tax and transfer pricing across civil law and common law jurisdictions. Engaging a lawyer in the United States with experience in both domestic tax legislation and cross-border structures is essential for groups that face IRS scrutiny on intercompany transactions. As a law firm advising on United States matters, we bring the dual-jurisdiction perspective that multinational clients require. To discuss your transfer pricing position, contact us at info@ferrazwhitmore.com.
Disclaimer: This publication is provided for informational purposes only and does not constitute legal advice. The information herein should not be relied upon as a substitute for professional legal counsel tailored to your specific circumstances. Ferraz & Whitmore assumes no liability for actions taken or not taken based on the contents of this material. For advice regarding your particular situation, please contact info@ferrazwhitmore.com.