What Is the Comparable Uncontrolled Price (CUP) Method?
The Comparable Uncontrolled Price (CUP) method is a transfer pricing method used to test whether the price charged in a transaction between related parties reflects an arm's length price. It compares the price actually charged or paid in the related-party transaction against the price charged or paid for the same, or a closely comparable, property or service in a transaction between unrelated parties — then adjusts for any differences between the two that could materially affect price. Where a sufficiently comparable uncontrolled transaction exists, CUP is generally regarded as the most direct of the transfer pricing methods, because it compares prices rather than margins or profits.
CUP is listed first among India's statutory transfer pricing methods, at clause (a) of section 165(1) of the Income-tax Act, 2025 (section 92C(1) of the Income-tax Act, 1961). It applies to transfer pricing for both cross-border "international transactions" between associated enterprises and, above a stated threshold, domestic related-party transactions.
Legal Basis
Section 165 of the Income-tax Act, 2025 (Section 92C of the Income-tax Act, 1961)
Section 165(1) provides: "The arm's length price in relation to an international transaction or specified domestic transaction shall be determined by any of the following methods, being the most appropriate method" — (a) comparable uncontrolled price method; (b) resale price method; (c) cost plus method; (d) profit split method; (e) transactional net margin method; (f) such other method as may be prescribed by the Board.
The choice among these six is not free-form. Section 165(2)(a) requires the most appropriate method to be "selected having regard to the nature of transaction or class of transaction or class of associated enterprise or functions performed by such enterprises or such other relevant factors as the Board may prescribe," and section 165(2)(b) requires it to be "applied for determination of arm's length price in such manner as may be prescribed."
Rule 79(1)(a) of the Income-tax Rules, 2026 — the CUP Mechanics
The step-by-step mechanics of the CUP method are set out in Rule 79(1)(a) of the Income-tax Rules, 2026, made for the purposes of section 165(2). It carries forward Rule 10B(1)(a) of the Income-tax Rules, 1962 in substantially the same words, and works in three steps:
- The price charged or paid for property transferred or services provided in a comparable uncontrolled transaction (or a number of such transactions) is identified.
- That price is adjusted to account for differences, if any, between the international transaction (or specified domestic transaction) and the comparable uncontrolled transactions, or between the enterprises entering into them, that could materially affect the price in the open market.
- The adjusted price is taken to be the arm's length price for the property transferred or services provided in the transaction being tested.
A comparable uncontrolled price can be "internal" — the taxpayer's own sale of the same or a similar item to an unrelated party — or "external" — a price between two unrelated parties in the wider market. Internal comparables are generally easier to defend because more of the surrounding facts (product, timing, market) already match.
The Other Five Methods, in Brief
CUP is one of six methods listed in section 165(1). The others are the resale price method (works back from the resale price to an unrelated party), the cost plus method (adds a market-based mark-up to the supplier's cost), the profit split method (divides combined profit between the related parties by their relative contribution), and the transactional net margin method, or TNMM (compares net profit margins rather than prices). The sixth method, under clause (f), is "such other method as may be prescribed by the Board" — commonly called the sixth method. It is prescribed by Rule 78 of the Income-tax Rules, 2026 (Rule 10AB of the Income-tax Rules, 1962) as "any method which takes into account the price, which—(a) has been charged or paid; or (b) would have been charged or paid, for the same or similar uncontrolled transaction, with or between non-associated enterprises, under similar circumstances, considering all the relevant facts."
Comparability and Adjustments
Because CUP compares prices directly, it is highly sensitive to comparability. Rule 79(1)(a)(ii) requires an adjustment for differences that could materially affect the open-market price — this can include differences in contract terms (credit period, warranties, delivery risk), volumes, geographic market, or the functions, assets, and risks (FAR) undertaken by each party. If the products or terms are not sufficiently alike and cannot be reliably adjusted for, CUP stops being the most appropriate method and one of the other five methods under section 165(1) should be used instead.
The Tolerance Range for Price Variation
Section 165(3)(a) distinguishes two situations. Where only one price is determined by the most appropriate method, the arm's length price is either that price, or the actual transaction price, "if the variation between the arm's length price so determined and price at which the international transaction or specified domestic transaction has actually been undertaken does not exceed such percentage not exceeding 3% of the latter, notified by the Central Government in this behalf." Where more than one price is determined by the most appropriate method, the arm's length price is determined in the manner prescribed. In plain terms, the Act itself caps the permissible tolerance band at 3%; the percentage actually in force is fixed by a separate Central Government notification for each year.
The most recent notification in this series is Notification No. 157/2025 dated 6 November 2025 (S.O. 5053(E)), issued under the third proviso to section 92C(2) of the Income-tax Act, 1961 read with the proviso to sub-rule (7) of Rule 10CA of the Income-tax Rules, 1962. It notifies a tolerance of "(i) one per cent. of the latter in respect of wholesale trading; and (ii) three per cent. of the latter in all other cases" for assessment year 2025-26. For that notification, "wholesale trading" means trading in goods where the purchase cost of finished goods is 80% or more of the total cost of the trading activity and average monthly closing inventory is 10% or less of the sales of that activity. The percentage applicable to a later year is notified separately and should be checked for the year in question.
When These Rules Apply to Domestic Transactions Too
The transfer pricing methods in section 165, including CUP, are not limited to cross-border dealings. Section 164 brings certain domestic related-party dealings — including transactions covered by sections 122, 140(9), 140(13), and 205(4) of the Act, and any other transaction as may be prescribed — within the definition of "specified domestic transaction" where "the aggregate of such transactions entered into by the assessee in a tax year exceeds a sum of twenty crore rupees." A foreign-owned Indian company dealing with a domestic group entity above this aggregate threshold must apply the same arm's length methods, including CUP where appropriate, to those domestic dealings.
The Assessing Officer's Power and Reference to the TPO
Under section 165(4), an Assessing Officer may redetermine the arm's length price during assessment if, on the material before them, they form the opinion that the price was not determined under section 165(1)-(3), that documentation required under section 171(1) (section 92D of the 1961 Act) was not kept, that the data used is unreliable, or that the assessee failed to furnish information sought under section 171(2)/(3). Before doing so, section 165(5) requires the Assessing Officer to issue a show-cause notice giving the assessee an opportunity to respond. Separately, section 166 of the Act (section 92CA of the 1961 Act) lets the Assessing Officer refer the determination of the arm's length price to a Transfer Pricing Officer, with the prior approval of the Principal Commissioner or Commissioner.
Documentation and Reporting Obligations
A taxpayer applying the CUP method must keep contemporaneous transfer pricing documentation under section 171 of the Income-tax Act, 2025 (section 92D of the Income-tax Act, 1961), showing why CUP was selected as the most appropriate method and how the comparable price and any adjustments were arrived at. The taxpayer must also furnish an accountant's report under section 172 of the Income-tax Act, 2025 (section 92E of the Income-tax Act, 1961), certifying the international transactions or specified domestic transactions entered into and the method applied to each. Rule 85 of the Income-tax Rules, 2026 prescribes that report as Form 48 (formerly Form 3CEB), to be furnished at least one month before the due date for furnishing the return of income under section 263(1)(c).
Advance Pricing Agreements and CUP
A taxpayer that wants certainty in advance, rather than defending its chosen method at assessment, can apply for an Advance Pricing Agreement (APA) under section 168 of the Income-tax Act, 2025 (section 92CC of the Income-tax Act, 1961). An APA lets the taxpayer and the tax authority agree in advance on the most appropriate method — which can be CUP, where a reliable comparable exists — for specified future transactions, reducing the risk of a later dispute over which method should have applied.
Why This Matters for Foreign Companies and Investors
Foreign companies with Indian subsidiaries, branches, or joint ventures routinely have related-party dealings that call for a transfer pricing method — goods bought from or sold to the Indian entity, royalties for licensed technology or brand, service fees, and intercompany financing. CUP is often the strongest method to defend when the Indian entity also transacts with an unrelated party on the same or a similar product or service, since an internal comparable removes much of the argument over fairness. Where the related-party price cannot be supported against a comparable uncontrolled price, an officer can redetermine it under section 165(4)-(6), increasing taxable income for the difference — with no matching deduction allowed elsewhere under section 165(7), and documentation exposure under sections 171 and 172 if the paperwork was not maintained.
Worked Example
An Indian subsidiary of a US manufacturer sells a component to its US parent. In the same quarter, on materially the same terms (specification, quantities, credit period, delivery), it also sells an identical component to an unrelated buyer in the open market at a different price. Because a directly comparable uncontrolled sale exists, the internal CUP method applies: the unrelated-party price, adjusted under Rule 79(1)(a)(ii) for any remaining difference in terms, is taken as the arm's length price for the sale to the US parent. If the price actually charged to the US parent falls outside the tolerance permitted under section 165(3)(a), the Assessing Officer can substitute the adjusted comparable price and recompute the subsidiary's income accordingly under section 165(6).
Common Mistakes
- Using CUP where the comparable is not genuinely alike. Differences in product grade, brand, contract terms, or market that cannot be reliably adjusted under Rule 79(1)(a)(ii) undermine a CUP analysis.
- Overlooking specified domestic transactions. The same methods, including CUP, apply to qualifying domestic related-party dealings once the section 164 aggregate threshold is crossed.
- Assuming the 3% tolerance always applies. Section 165(3)(a) caps the notified tolerance at 3%, and the notification in force for assessment year 2025-26 allows only 1% for wholesale trading.
- Treating CUP as always the best method. Section 165(2)(a) requires the most appropriate method to be selected for the specific transaction; weak comparability calls for a different method.
- Skipping the paperwork. Selecting CUP without the documentation required under section 171 and the accountant's report under section 172 leaves the position exposed.
Frequently Asked Questions
What is the difference between internal and external CUP?
An internal CUP compares the related-party price with the same taxpayer's own price for the same or a similar item sold to an unrelated party. An external CUP compares it with a price between two unrelated parties in the wider market. Internal comparables are usually easier to support because more surrounding facts already match, while external comparables need more adjustment for market and contract differences.
Is the CUP method mandatory for every related-party transaction?
No. Section 165(1) lists six methods, and section 165(2)(a) requires the "most appropriate method" to be selected having regard to the nature of the transaction, the class of associated enterprise, and the functions performed. CUP is used where a sufficiently comparable uncontrolled price exists; otherwise the resale price, cost plus, profit split, TNMM, or the other prescribed method may fit better.
What tolerance range applies before a transfer pricing adjustment is made?
Section 165(3)(a) permits the actual transaction price to stand, instead of the computed arm's length price, if the variation between them does not exceed a percentage "not exceeding 3% of the latter," as notified by the Central Government. Notification No. 157/2025 dated 6 November 2025 sets that percentage for assessment year 2025-26 at one per cent for wholesale trading and three per cent in all other cases. The percentage for a later year is notified separately.
Does the CUP method apply to purely domestic transactions in India?
Yes, where the domestic transaction is a "specified domestic transaction" under section 164 — broadly, certain related-party dealings listed in the Act — and the taxpayer's aggregate value of such transactions in the tax year exceeds twenty crore rupees. Below that threshold, domestic related-party dealings are outside the transfer pricing methods in section 165.
What happens if the tax authority disagrees with the CUP price used?
An Assessing Officer can redetermine the arm's length price under section 165(4) if they consider the taxpayer's method was not correctly applied, documentation was not maintained, the data used was unreliable, or requested information was not furnished — but only after issuing a show-cause notice under section 165(5). The Assessing Officer may also refer the case to a Transfer Pricing Officer under section 166, with the approval of the Principal Commissioner or Commissioner.
See also: Transfer Pricing, Arm's Length Pricing, and Transfer Pricing Documentation.
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