Section 166 Reference to Transfer Pricing Officer.

Income-tax Act, 2025

At a Glance

Clause 166 of the Income Tax Bill, 2025 (Old Version) sets out the mechanism whereby an Assessing Officer may refer determination of arm's length price in relation to international transactions or specified domestic transactions to a designated Transfer Pricing Officer (TPO). It affects taxpayers engaging in related-party cross-border and specified domestic dealings, the Income-tax Department (Assessing Officers and TPOs), and compliance workflows around transfer pricing. Effective date or enactment timing: Not stated in the document.

Background & Scope

Statutory hooks: Clause 166 (Income Tax Bill, 2025 - Old Version); cross-references to sections 165, 171, 172, 286, 287, 288, 246, 252, 253 and Chapter XVI-B are included. The provision governs referral, notice and determination procedures for arm's length pricing, the temporal application of such determinations to subsequent tax years via an opt-in mechanism, powers of the Transfer Pricing Officer, correction of apparent mistakes and administrative guidelines. Definitions: "Transfer Pricing Officer" is defined in the Clause (last sub-section) as a Joint Commissioner or Deputy Commissioner or Assistant Commissioner authorised by the Board to perform functions of an Assessing Officer specified in sections 165 and 171 in respect of any person or class of persons.

Statutory Provision Mode

Text & Scope

Clause 166 applies where an assessee has entered into an international transaction or a specified domestic transaction in any tax year and the Assessing Officer considers it necessary to refer the determination of arm's length price to the Transfer Pricing Officer (TPO), subject to prior approval of the Principal Commissioner or Commissioner. The TPO determination process includes issuance of notice to produce evidence, hearing the assessee, gathering and considering materials, and issuing a written order determining the arm's length price as per section 165(4). The TPO must send a copy of the order to the Assessing Officer and the assessee.

Interpretation

The Clause contemplates a two-tiered administrative model: initial assessment functions remain with the Assessing Officer, but specialized determination of arm's length price may be delegated (by referral) to a TPO. The text mandates prior approval of senior supervisory officers (Principal Commissioner/Commissioner) for a reference. The Clause prescribes that the TPO's order is binding on the Assessing Officer for purposes of computing total income (section 165(6)), subject to the special opt-in regime for applying a determined price to two subsequent tax years. The procedural steps (notice, hearing, consideration of documents, and written order) indicate an administrative due-process architecture. The reference to prescribed form, manner and period for exercising the opt-in indicates delegated rule-making scope; similar language governs conditions attached to validating options.

Exceptions/Provisos

- No reference under sub-section (1) shall be made if the TPO has declared an option exercised by the assessee under sub-section (9) to be valid for that tax year (sub-section (2)).

- If a reference is made for a tax year for which an option has been or will be declared valid, sub-section (1) shall have effect as if no reference were made (sub-section (3)).

- Sub-section (9) provides an opt-in mechanism: an arm's length price determined by the TPO for a tax year may apply to similar transactions for the two consecutive tax years immediately following, if the assessee exercises an option for those years in prescribed form, manner and time, and the TPO declares the option valid within one month from the end of the month in which the option is exercised. The opt-in does not apply to proceedings under Chapter XVI-B (sub-section (10)).

- Sub-section (12) provides that where the TPO declares the option valid, the TPO shall examine and determine the arm's length price for the two consecutive years and on receipt of such order the Assessing Officer shall recompute the assessee's income as per the provisions of section 288 (text states "section 288").

Illustrations

• Example 1: An assessee enters into an international transaction in tax year 2024-25. The Assessing Officer refers pricing to the TPO with Principal Commissioner approval. The TPO issues notice, hears the assessee, and issues an order under sub-section (6) determining arm's length price. The Assessing Officer computes total income in conformity with that order u/s 165(6). (Textual sequence: referral -> notice -> determination -> AO computation.)
• Example 2: Following the TPO order for 2024-25, the assessee exercises the option under sub-section (9) for 2025-26 and 2026-27. The TPO, within one month from the end of the month in which the option is exercised, declares the option valid. The TPO then examines and determines arm's length price for those two years and sends orders; the Assessing Officer recomputes income for those years as per section 288. (This scenario presumes the option and declaration steps set out in sub-sections (9) and (12).)

Interplay

Clause 166 cross-references section 165(4) for the substantive method of arm's length determination, section 171(2) for documents/information referenced at hearing, section 172 (reporting obligations) and sections 286/287/288 concerning limitation, amendment/rectification and recomputation procedures. It disapplies the opt-in in relation to Chapter XVI-B proceedings. The TPO is empowered to exercise specified powers u/ss 246(1)(a)-(d), 252(1)(a) or 253 for purposes of determining arm's length price, aligning investigative powers with existing procedural provisions.

Differences between Clause 166 of the Income Tax Bill, 2025 - (Old Version) and Section 166 of the Income-tax Act, 2025 

Topic	Clause 166 (Bill, Old Version)	Section 166 (Act, 2025)
Limitation language for timing of TPO order	Sub-section (7) in Bill: "an order under sub-section (6) may be made at any time before sixty days before the expiry of limitation period referred to in section 286, or 296, for making the order of assessment or reassessment or recomputation or fresh assessment." (ambiguous phrasing)	Section 166 (Act): Sub-section (7) states an order may be made "at any time sixty days before the expiry of the limitation period" (clearer formulation).
Extension where remaining period < 60 days	Bill sub-section (8) refers to circumstances in section 286(3)(b) or (i).	Act sub-section (8) refers to section 286(3)(b) or (h).
Opt-in prescription wording	Bill uses "as prescribed" in sub-section (9)(b) and (c) uses "as prescribed".	Act uses "as may be prescribed" consistently.
Provision for guidelines - temporal limit	Bill contains an express sunset: "No guideline under sub-section (15) shall be issued after the expiration of two years from the 1st April, 2026." (sub-section (16) in Bill).	Act does not contain this two-year prohibition; instead, Act has provisions on laying guidelines before Parliament (numbering differs).
Parliamentary laying and numbering	Bill: Parliamentary laying provision is sub-section (17); definition of TPO is sub-section (18).	Act: Parliamentary laying provision appears as sub-section (16) and definition of TPO as sub-section (17).
Recomputation reference for two years	Bill sub-section (12) directs the Assessing Officer to recompute income "as per the provisions of section 288."	Act sub-section (12) references recomputation "as per the provisions of section 288(2)." (more specific).

Practical impact of those differences: the Act's clearer timing language reduces ambiguity about the deadline for TPO orders; the change from references to subsections of section 286 (i)/(h) could affect which circumstances trigger limitation extension and thus the time available to TPOs; the sunset on issuing guidelines in the Bill (two-year cutoff) would have limited the Board's delegated power to issue guidelines after a set date - its absence in the Act means continued open-ended guideline authority (subject to parliamentary laying). The specificity of section references for recomputation (section 288(2) in the Act versus section 288 in the Bill) narrows procedural applicability and could affect rectification/recomputation mechanics. Numbering and minor drafting variations may create interpretive questions but do not alter the core referral framework.

Practical Implications

• Compliance and risk areas: Taxpayers with related-party international or specified domestic transactions face potential referral to a TPO, which centralises technical scrutiny of transfer pricing. The opt-in mechanism creates an incentive to regularise pricing for two subsequent years but requires strict adherence to prescribed forms, manner and timelines (prescription itself: Not stated in the document).
• Record-keeping/evidence points: Clause emphasises production of evidence on which the assessee relies and references documents/information u/s 171(2). Accordingly, contemporaneous transfer pricing documentation, contractual records, benchmarking studies and supporting data are necessary for the TPO hearing. Specific documentary lists or formats: Not stated in the document.

Key Takeaways

• The Assessing Officer may, with prior approval, refer arm's length price determination to a designated Transfer Pricing Officer for international and specified domestic transactions.
• The TPO follows a formal notice, evidence, hearing and written order procedure; the order is sent to the Assessing Officer and the assessee and governs computation u/s 165(6).
• An opt-in allows a TPO's arm's length determination for one year to be applied to similar transactions for the two immediately following years, subject to prescribed conditions and a TPO validation step.
• The Clause confers on the TPO certain powers to require information and to amend orders for mistakes apparent from record, and cross-links to other assessment and limitation provisions.
• Details on prescribed forms/manner/period for option exercise, timelines for AO/TPO actions beyond those specified, and effective date/commencement are not provided in the Clause ("Not stated in the document.").

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Full Text:

Section 166 Reference to Transfer Pricing Officer.

Reference to Transfer Pricing Officer centralises arm's length price determination, binding assessments and enabling validated multi year application. An Assessing Officer, with prior supervisory approval, may refer determination of the arm's length price for international or specified domestic transactions to a designated Transfer Pricing Officer who issues a written order after notice and hearing; that TPO order is binding on the Assessing Officer for computing total income, and an opt in permits validated application of the TPO's determination to the two immediately following tax years subject to prescribed conditions and recomputation procedures.