Direct Tax Laws and International Taxation · Transfer Pricing

Arm's Length Price Methods and How to Compute Them

Updated 11 October 2026 · Fact-checked

Arm's length price is the price that would be charged between unrelated parties in similar conditions. Under the Income-tax Act, 2025 you fix it using the most appropriate method: CUP, resale price, cost plus, profit split, TNMM or a prescribed method. Apply it to the comparables, then compare the result with the actual price.

Understand Arm's Length Price and Computation Methods

Two related companies can set prices to suit themselves. A parent can sell goods to its Indian subsidiary cheaply, or charge it high fees, and shift profit to a low-tax country. The arm's length price (ALP) is the price that independent parties would have agreed in the same conditions. Tax law uses it as the benchmark.

Section 165(1) of the Income-tax Act, 2025 lists the methods for an international transaction or specified domestic transaction: comparable uncontrolled price (CUP), resale price method (RPM), cost plus method (CPM), profit split method (PSM), transactional net margin method (TNMM) and any other method prescribed by the Board. You must use the most appropriate method. There is no free choice and no fixed ranking in the section.

Section 165(2) says the method is chosen having regard to the nature of the transaction or class of transaction, the class of associated enterprise, the functions performed, and other factors the Board may prescribe. In practice: use CUP when you have a truly similar uncontrolled price. Use RPM for a distributor that resells without much value addition. Use CPM for a manufacturer or service provider whose cost base is reliable. Use PSM for highly integrated operations with unique contributions from both sides. Use TNMM when only net profit margins can be compared.

The result may be one price or many. Under section 165(3)(a), if only one price is determined, the ALP is that price. However, if the actual price differs from it by no more than the tolerance percentage notified by the Central Government (which cannot exceed 3% of the actual price), the actual price is taken as the ALP. Under section 165(3)(b), if more than one price results, the ALP is determined in the prescribed manner. This is where the range concept applies. Do not invent the manner in an answer; say it is as prescribed.

The Assessing Officer can redetermine the ALP only on the grounds in section 165(4), such as non-compliance with the method rules, missing documents, unreliable data or failure to furnish information. Before that, a show-cause notice is needed under section 165(5).

Key rules to remember

Methods under section 165(1): CUP | RPM | CPM | PSM | TNMM | other prescribed method; Choose the most appropriate method, not the one that gives the lowest adjustment.
CUP method: ALP = price in comparable uncontrolled transaction (after adjustments for differences); Adjust for differences such as quantity, credit terms, freight and quality.
Resale price method: ALP = Resale price to independent party − Gross profit margin − Other costs (customs duty etc.); Gross margin = resale price × gross profit rate earned in comparable uncontrolled transactions.
Cost plus method: ALP = Direct and indirect cost of production + Normal gross mark-up on that cost; Mark-up % is applied to cost, not to selling price.
TNMM: Net profit margin = Operating profit ÷ Base (cost, sales or assets); ALP operating profit = Base × comparable margin; Compare margin of the tested party with margins of comparables. Choose a base that fits the functions.
Tolerance rule, section 165(3)(a)(ii): Actual price accepted if |ALP − actual price| ≤ notified % of actual price (not above 3%); The percentage is notified by the Central Government. Tolerance is tested against the actual price.
Adjustment to income: Primary adjustment = ALP − Actual price (for a sale by the assessee); Actual price − ALP (for a purchase); Income of the assessee goes up. No deduction under Chapter VIII on the enhanced income, section 165(7).

How to solve Arm's Length Price and Computation Methods questions

Use this order for any computation or theory question on ALP.

1Identify the transaction. Is it an international transaction or a specified domestic transaction, and who is the tested party?
2List the functions performed, assets used and risks borne by each party. This drives the method choice.
3Select the most appropriate method and give one line of reasoning from section 165(2), such as nature of transaction and functions.
4Apply the method formula with the data given. Make comparability adjustments first if the question gives them.
5If more than one price results, say the ALP is determined in the prescribed manner and use the range or mean given in the question.
6Apply the tolerance test, if the question gives a notified percentage, against the actual price.
7Compute the primary adjustment and the revised total income, and state that no Chapter VIII deduction is allowed on the enhancement.
8Close with the consequence: secondary adjustment or documentation points if the question asks for them.

Quickest way: Method-matching shortcut

When to use it: Use this for MCQs and for the first line of a long answer when you must pick the method fast.

Identical product, open market price available: CUP.
Distributor buys and resells with little change: RPM, start from the resale price and go backwards.
Manufacturer or service provider selling to an associate: CPM, start from cost and go forward.
Both parties contribute unique intangibles and profits are shared: PSM.
No reliable gross margin or price data, only net margins: TNMM.
Then compute: RPM subtracts margin from resale price; CPM adds mark-up to cost; TNMM applies comparable margin to the base.

Common mistakes in Arm's Length Price and Computation Methods

Applying the cost plus mark-up to the selling price instead of to cost.
Students confuse mark-up with margin.
Fix: For CPM, ALP = cost × (1 + mark-up %). For RPM, margin is a % of resale price, so ALP = resale price × (1 − margin %).
Testing the tolerance limit against the ALP instead of the actual price.
It feels natural to use the benchmark as the base.
Fix: Section 165(3)(a)(ii) measures the variation as a percentage of the actual price. Compute the percentage on the actual price.
Choosing a method without giving reasons.
Students treat the method as a free choice or memorise a ranking.
Fix: State that the most appropriate method is chosen under section 165(2) on the nature of transaction, functions performed and similar factors, then link the facts to the method.
Forgetting that deduction under Chapter VIII is denied on the enhanced income.
Students stop at the adjustment.
Fix: Add one line citing section 165(7) when the question asks for the revised tax liability.
Ignoring the show-cause notice and the grounds for AO action.
Theory is skipped while preparing numbers.
Fix: Remember that the AO needs a ground under section 165(4) and must issue a notice under section 165(5) before redetermining the ALP.
Stating the tolerance as a fixed 3% in all cases.
The upper cap is remembered as the rate.
Fix: Write that the percentage is notified by the Central Government and cannot exceed 3%. Use the figure given in the question.

Worked examples

Example 1

Bharat Motors Ltd, an Indian company, buys 10,000 units from its foreign parent at ₹920 per unit and sells them to independent Indian dealers at ₹1,200 per unit. Comparable independent distributors earn a gross margin of 20% on resale price. Ignore other costs. Find the ALP per unit and the adjustment, assuming RPM is the most appropriate method.

Show the solution

Resale price to independent party = ₹1,200 per unit.
Gross margin at 20% of resale price = ₹240.
ALP of purchase = ₹1,200 − ₹240 = ₹960 per unit.
Actual price paid = ₹920 per unit, which is below the ALP.
Since the Indian company bought at less than ALP, its cost is lower and its profit is higher. No upward adjustment is needed for the buyer's income. The adjustment relates to the foreign seller's side.

Answer: ALP is ₹960 per unit. The purchase price of ₹920 is lower, so no increase in the Indian company's income arises. The case shows that adjustment direction depends on whether the Indian party is buyer or seller.

Example 2

Kaveri Components Pvt Ltd manufactures parts at a cost of ₹800 per unit and sells 5,000 units to its foreign associate at ₹880 per unit. Comparable independent manufacturers earn a normal gross mark-up of 20% on cost. The notified tolerance is 1% of the actual price. Find the ALP, test the tolerance and compute the adjustment, using CPM.

Show the solution

Cost per unit = ₹800.
ALP per unit = ₹800 × (1 + 20%) = ₹960.
Variation = ₹960 − ₹880 = ₹80 per unit.
Tolerance = 1% of actual price ₹880 = ₹8.80 per unit.
₹80 exceeds ₹8.80, so the actual price is not accepted and ALP of ₹960 applies.
Primary adjustment per unit = ₹960 − ₹880 = ₹80.
Total adjustment = ₹80 × 5,000 = ₹4,00,000.

Answer: ALP is ₹960 per unit. The tolerance is not met. Total income is increased by ₹4,00,000, and no Chapter VIII deduction is allowed on this enhancement under section 165(7).

Exam tips

In MCQs, the usual traps are mark-up versus margin and the base for the tolerance test. Read the base word before computing.
In case-study answers, always give one reason for your choice of method, tied to functions and the nature of the transaction.
Quote section 165(3), 165(4), 165(5) and 165(7) precisely. Only the cap of 3% is fixed in the Act; the actual percentage is notified.
Show every working line in numerical questions. Part marks are given for the method and the correct base even if the final figure slips.
State the direction of adjustment clearly: income of the assessee increases only when the ALP is higher than the price on a sale, or lower than the price on a purchase.

Practice questions from Transfer Pricing

Arm's Length Price and Computation Methods in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Arm's Length Price and Computation Methods: frequently asked questions

What are the methods for determining arm's length price?

Section 165(1) of the Income-tax Act, 2025 lists CUP, resale price, cost plus, profit split, TNMM and any other method prescribed by the Board. You must apply the most appropriate one.

How is the most appropriate method chosen?

Under section 165(2), it is selected having regard to the nature of the transaction or class of transaction, the class of associated enterprise, the functions performed and other factors the Board may prescribe. The facts of the case decide it.

What is the tolerance range for arm's length price?

If one price is determined and the actual price varies from it by not more than the percentage notified by the Central Government, the actual price is treated as the ALP. That percentage cannot exceed 3% of the actual price.

What happens if more than one price is found by the method?

Section 165(3)(b) says the ALP is the price determined in the prescribed manner. In an exam, apply the manner given in the question and say that it is as prescribed.

When can the Assessing Officer redetermine the ALP?

Only on the grounds in section 165(4), such as the price not being fixed under the method rules, missing documents, unreliable data or non-furnishing of information. A show-cause notice under section 165(5) comes first.