Rule 80: Selecting the most appropriate transfer-pricing method
Rule 80 requires the arm’s-length method best suited to the facts and circumstances of the particular transaction and providing the most reliable measure. It lists six factors for that selection.
Official notified Income-tax Rules, 2026Need advice on Rule 80?
This article is for general information. Read the official Rules and applicable Act amendments, including the Taxation and Other Laws (Amendment) Act, 2026. If you need professional advice for your situation, contact Bizeneed.
On this page
- Bare law
- Begin with the transaction and enterprise functions
- Assess data availability, coverage and reliability
- Evaluate whether differences can be adjusted reliably
- Review the assumptions needed by each method
- Record the selection and alternatives
- Key takeaways
- Practical checklist
- FAQs
- Glossary
- Official sources
Bare law
Rule 80 - Most appropriate method
(1) For the purposes of section 165(2)(a), the most appropriate method shall be the method which is best suited to the facts and circumstances of each particular international transaction or specified domestic transaction and which provides the most reliable measure of an arm's length price in relation to the international transaction or the specified domestic transaction, as the case may be.
(2) The following factors shall be taken into account for selecting the most appropriate method: — (a) the nature and class of the international transaction or the specified domestic transaction; (b) the class or classes of associated enterprises entering into the transaction and the functions performed by them taking into account assets employed or to be employed and risks assumed by such enterprises; (c) the availability, coverage and reliability of data necessary for application of the method; (d) the degree of comparability existing between the international transaction or the specified domestic transaction and the uncontrolled transaction and between the enterprises entering into such transactions; (e) the extent to which reliable and accurate adjustments can be made to account for differences, if any, between the international transaction or the specified domestic transaction and the comparable uncontrolled transaction or between the enterprises entering into such transactions; and (f) the nature, extent and reliability of assumptions required to be made in application of a method.
Rule breakdown
Begin with the transaction and enterprise functions
Consider the nature and class of the international or specified domestic transaction and the classes of associated enterprises. Analyse functions performed, assets employed or to be employed and risks assumed.
The same group may need different methods for transactions with different economics. Do not select a method solely because it was used for another entity.
Assess data availability, coverage and reliability
A method depends on evidence that can actually support its application. Review the breadth and quality of available data and the comparability of the transactions and enterprises.
Document data gaps and why a selected source is reliable, rather than choosing only the largest database result set.
Evaluate whether differences can be adjusted reliably
The extent of reliable and accurate adjustments is an express factor. Identify material differences and whether available information permits their effects to be addressed.
A method with apparently close comparables may still be weak if the required adjustments cannot be made with sufficient reliability.
Review the assumptions needed by each method
Consider the nature, extent and reliability of the assumptions required. Explain why the selected method provides the most reliable measure for the particular case.
Do not treat a formula as objective merely because it produces a precise number; the assumptions and underlying evidence determine reliability.
Record the selection and alternatives
Prepare a short method-selection memo covering all six factors, the selected method and significant alternatives considered. Link it to the Rule 79 calculation and supporting evidence.
Revisit the rationale if transaction terms, functions or available data materially change. A previous choice is evidence to review, not an automatic permanent selection.
Key takeaways
Facts determine selection
The method must fit the particular transaction.
Reliability is central
Data, comparability, adjustments and assumptions all matter.
Document alternatives
Explain why the selected method is the most reliable available approach.
Practical checklist
- Evaluate all six listed factors.
- Document important alternatives and data limitations.
- Link the method choice to the functional and comparability analysis.
Avoid
- Do not choose a method solely for a preferred numerical result.
- Do not confuse numerical precision with evidential reliability.
FAQs
Does Rule 80 make one method mandatory for every transaction?
No. It requires the method best suited to the particular facts and providing the most reliable measure.
Is data availability the only factor?
No. The rule also includes transaction type, functions/assets/risks, comparability, adjustments and assumptions.
Can the same method simply be reused every year?
The current facts and circumstances must support the selection; material changes may require reassessment.
Glossary
- Most appropriate method
- The method best suited to the particular transaction and providing its most reliable arm’s-length measure.
- Comparability
- The degree of similarity relevant to the transactions and enterprises under the selected method.