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When companies operate across borders, transactions between related entities can move billions of dollars in revenue, costs, royalties, interest and service fees. For the Internal Revenue Service, the key question is straightforward: Would unrelated companies have agreed to the same terms?
That question sits at the center of U.S. transfer pricing rules.
Under Internal Revenue Code Section 482, the IRS can adjust income, deductions, credits or allowances among commonly controlled taxpayers when necessary to clearly reflect income or prevent tax evasion. The underlying standard is the arm’s-length principle—the result should generally resemble what independent companies would have achieved under comparable circumstances.
For multinational companies, understanding how the IRS evaluates intercompany transactions is therefore critical. A transfer pricing policy is not simply about choosing a percentage or markup. It requires evidence, economic analysis and documentation.
What Is Transfer Pricing?
Transfer pricing refers to the prices charged in transactions between related companies. These transactions can include the sale of products, management services, intellectual property, financing, royalties and other forms of support.
Consider a U.S. subsidiary that purchases products from its foreign parent. The parent charges the subsidiary $80 per unit, and the subsidiary later sells the product to customers for $100.
The $80 price affects where the group’s taxable income is reported. If the intercompany price is significantly different from what independent companies would have negotiated, the IRS may question whether the arrangement produces an appropriate allocation of income.
The IRS’s authority under Section 482 is designed to address precisely that issue.
The Arm’s-Length Standard Comes First
The starting point for an IRS transfer pricing review is the arm’s-length standard.
In practical terms, the IRS asks what independent parties would have done under similar circumstances. That means examining the actual economics of the transaction rather than relying solely on the wording of an intercompany agreement.
The IRS identifies five major comparability factors:
- Functions performed
- Contractual terms
- Risks assumed
- Economic conditions
- Property or services involved
The relative importance of each factor depends on the transfer pricing method being applied.
This is why two companies selling similar products may still require different transfer pricing analyses. Their functions, risks, contracts or market conditions could be materially different.
Functional Analysis: Who Does What?
One of the most important parts of an IRS review is the functional analysis.
The analysis examines what each related company actually does, what assets it uses and what risks it assumes. A company described as a “distributor,” for example, may perform significantly different activities from another distributor.
The IRS’s transfer pricing guidance emphasizes that functional analysis should go beyond simple labels. It should explain the economic activities performed by each party and connect those activities to the pricing methodology.
Risk allocation is particularly important. If a company claims to operate as a low-risk distributor but simultaneously assumes significant inventory, market or credit risk, the IRS may question whether the reported profit is consistent with those responsibilities.
Choosing the Best Transfer Pricing Method
The IRS does not require taxpayers to use one universal method. Instead, U.S. transfer pricing regulations generally apply a best method rule.
The taxpayer must select and apply the method that provides the most reliable measure of an arm’s-length result based on the available facts and data.
Depending on the transaction, methods can include the Comparable Uncontrolled Price method, Resale Price method, Cost Plus method, Comparable Profits Method and Profit Split Method. Services and other transactions can have additional rules and methods.
In recent IRS APA data, the Comparable Profits Method (CPM), also known internationally as the Transactional Net Margin Method (TNMM), remained the most frequently used method for transactions involving tangible and intangible property. The IRS reported that CPM/TNMM was used for 86% of those transactions covered by its 2025 APA statistics.
That figure does not mean CPM is automatically the correct method for every company. The appropriate method depends on the facts and reliability of available comparables.
How the IRS Evaluates Comparables
Comparable companies or transactions are central to many transfer pricing studies.
The IRS examines whether the selected comparables are genuinely similar to the controlled transaction. That can involve reviewing business activities, products or services, geographic markets, contractual arrangements, risks and financial characteristics.
A company cannot simply select a group of businesses with similar industry codes and assume the analysis is complete.
The IRS has specifically emphasized the importance of explaining why comparables were selected, how differences were addressed and whether adjustments are economically reasonable.
This becomes particularly important when there are no perfect comparables. In those situations, taxpayers may need to make comparability adjustments or consider whether another method produces a more reliable result.
Documentation Can Matter as Much as the Number
A defensible transfer pricing result needs supporting documentation.
Under the Section 6662 rules, taxpayers generally need contemporaneous documentation demonstrating that they reasonably selected and applied an appropriate method. The documentation should explain the controlled transactions, the method selected, alternatives considered, comparables used and the economic analysis supporting the conclusion.
The IRS also states that requested transfer pricing documentation generally must be provided within 30 days of an IRS request during an examination.
Importantly, documentation alone does not automatically eliminate penalty exposure. The IRS can still evaluate whether the method, inputs and analysis were reasonable.
What Can Trigger IRS Scrutiny?
Transfer pricing examinations are highly fact-intensive. The IRS may look more closely at transactions when reported results appear inconsistent with the company’s functions, assets and risks.
For example, persistent losses at a U.S. distributor may prompt questions about whether its purchase prices from a related foreign company are too high. But the IRS also considers whether those losses could have resulted from legitimate business conditions.
The agency’s examination process therefore involves developing facts, reviewing financial information, assessing the taxpayer’s method and examining whether the documentation supports the reported position.
Why Transfer Pricing Matters for Finance Leaders
For CFOs, tax executives and multinational finance teams, transfer pricing is more than a tax compliance exercise.
Intercompany pricing affects operating margins, cash flows, tax liabilities and financial reporting across jurisdictions. A policy that looks reasonable on paper can become difficult to defend if actual business activities change but the documentation does not.
The safest approach is to treat transfer pricing as an ongoing process: understand the functions and risks, select the most reliable method, maintain credible comparables and update documentation when the business changes.
The IRS’s message is increasingly clear: strong transfer pricing analysis should explain the economics behind the numbers—not simply justify the numbers after the fact.
For companies with significant cross-border transactions, that distinction can make an IRS examination more predictable, efficient and defensible.
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