Case Laws & Commentary · Income-tax Act, 1961 (as amended by the Finance Act, 2026) · bharattax.co Treatise
Status: Live. Inserted by the Finance Act, 2017 (w.e.f. 1 April 2017). Mandates quoting of the Aadhaar number in the PAN application and in the return of income, and intimation of Aadhaar for PAN-linkage, failing which the PAN is rendered inoperative.
FA 2026: No substantive amendment by the Finance Act, 2026. The Finance Act, 2024 inserted the second proviso and sub-section (2A) regulating PANs allotted on the basis of an Enrolment ID (w.e.f. 1 October 2024).
Constitutional status: Upheld by the Supreme Court in Binoy Viswam (2017) on Articles 14 and 19, with the Article 21 (privacy) question left to the Constitution Bench, which subsequently upheld the provision in K.S. Puttaswamy (Aadhaar).
A. SECTION COMMENTARY
Section 139AA requires every person eligible to obtain an Aadhaar number to quote it in the PAN application and in the return of income, and every existing PAN-holder to intimate Aadhaar by the notified date, on pain of the PAN being made inoperative. The provision was the legislative response to the problem of multiple/duplicate PANs and was designed to de-duplicate the taxpayer base using Aadhaar's biometric uniqueness.
Its validity was tested immediately on insertion. The Supreme Court's two-stage treatment — first in Binoy Viswam (2017) on the equality and trade-freedom grounds, and then through the Constitution Bench in the Aadhaar judgment (Puttaswamy, 2018) on privacy — settles that the mandatory linkage of Aadhaar with PAN for income-tax purposes is constitutionally valid, subject to the reading-down of retrospective invalidation of PANs.
B. STATUTORY POSITION (verbatim text)
Reproduced from the local Act (base text to the Finance Act, 2025), including the second proviso and sub-section (2A) inserted by the Finance Act, 2024.
139AA. (1) Every person who is eligible to obtain Aadhaar number shall, on or after the 1st day of July, 2017, quote Aadhaar number—
(i) in the application form for allotment of permanent account number;
(ii) in the return of income:
Provided that where the person does not possess the Aadhaar Number, the Enrolment ID of Aadhaar application form issued to him at the time of enrolment shall be quoted in the application for permanent account number or, as the case may be, in the return of income furnished by him: 88-Provided further that nothing in the first proviso shall apply in respect of any application form for allotment of permanent account number or return of income furnished on or after the 1st day of October, 2024.
(2) Every person who has been allotted permanent account number as on the 1st day of July, 2017, and who is eligible to obtain Aadhaar number, shall intimate his Aadhaar number to such authority in such form and manner as may be prescribed, on or before a date to be notified by the Central Government in the Official Gazette:
Provided that in case of failure to intimate the Aadhaar number, the permanent account number allotted to the person shall be made inoperative after the date so notified in such manner as may be prescribed. 88-(2A) Every person who has been allotted permanent account number on the basis of Enrolment ID of Aadhaar application form filed prior to the 1st day of October, 2024, shall intimate his Aadhaar number to such authority in such form and manner, as may be prescribed, on or before a date to be notified by the Central Government in the Official Gazette.
(3) The provisions of this section shall not apply to such person or class or classes of persons or any State or part of any State, as may be notified by the Central Government in this behalf, in the Official Gazette.
Explanation.—For the purposes of this section, the expressions—
(i) "Aadhaar number", "Enrolment" and "resident" shall have the same meanings respectively assigned to them in clauses (a), (m) and (v) of section 2 of the Aadhaar (Targeted Delivery of Financial and other Subsidies, Benefits and Services) Act, 2016 (18 of 2016);
(ii) "Enrolment ID" means a 28 digit Enrolment Identification Number issued to a resident at the time of enrolment.
C. AUTHORITIES
The authorities are constitutional and binding.
1. Constitutional validity of Aadhaar-PAN linkage
Binoy Viswam v. Union of India (2017) 396 ITR 66 (SC)
Court / Bench: Supreme Court of India (A.K. Sikri and Ashok Bhushan JJ.); judgment dated 9 June 2017.
Issue: Constitutional validity of section 139AA (mandatory quoting of Aadhaar for PAN and returns) under Articles 14, 19(1)(g) and 21.
Held: The Court upheld section 139AA against the challenge under Article 14 (equality) and Article 19(1)(g) (freedom of trade/profession), finding a legitimate State interest in curbing tax evasion, black money and duplicate PANs, and a rational nexus. On Article 21 (informational privacy) the Court declined to decide, that question being before the larger Constitution Bench; pending its decision, the Court partially stayed sub-section (2) so that existing PANs would not be cancelled retrospectively for non-linkage. Sub-section (2) was read down to operate prospectively.
Significance: The foundational decision sustaining the Aadhaar-PAN linkage; it establishes the legislative competence and the equality/trade-freedom validity of section 139AA and the prospective character of PAN invalidation.
Justice K.S. Puttaswamy (Retd.) v. Union of India (2019) 1 SCC 1 (SC) [Aadhaar — Constitution Bench]
Court / Bench: Supreme Court of India, five-Judge Constitution Bench; judgment dated 26 September 2018.
Held: Upholding the Aadhaar Act and the Aadhaar project on the privacy touchstone laid down in the nine-Judge privacy judgment, the Constitution Bench specifically upheld section 139AA of the Income-tax Act — the mandatory linkage of Aadhaar with PAN — as a proportionate measure serving the legitimate State aim of preventing income-tax evasion and de-duplicating PAN, while striking down or reading down other uses of Aadhaar (e.g. section 57).
Significance: Completes the constitutional validation left open in Binoy Viswam: the Aadhaar-PAN linkage in section 139AA survives the proportionality/privacy test. Aadhaar-PAN linkage for income-tax is therefore settled law.
Compiled for the bharattax.co Treatise on the Income-tax Act, 1961 (as amended by the Finance Act, 2026). Statutory text reproduced from the Income-tax Act, 1961 (text as printed in the local Act, base text amended up to the Finance Act, 2025), with the publisher's footnote apparatus and amendment-marker brackets removed; Finance Act, 2026 changes are flagged in the commentary. Citations are stated as reported; orders of the Tribunal, Authority for Advance Rulings and High Courts are flagged as such. Where a section has not been judicially construed, that is stated candidly and the nearest governing authority is given. This material is for professional reference and is not legal advice.
CHAPTER XIV — PROCEDURE FOR ASSESSMENT
Section 139AA — Quoting of Aadhaar Number
Case Laws & Commentary · Income-tax Act, 1961 (as amended by the Finance Act, 2026) · bharattax.co Treatise
Status: Live. Inserted by the Finance Act, 2017 (w.e.f. 1 April 2017). Mandates quoting of the Aadhaar number in the PAN application and in the return of income, and intimation of Aadhaar for PAN-linkage, failing which the PAN is rendered inoperative.
FA 2026: No substantive amendment by the Finance Act, 2026. The Finance Act, 2024 inserted the second proviso and sub-section (2A) regulating PANs allotted on the basis of an Enrolment ID (w.e.f. 1 October 2024).
Constitutional status: Upheld by the Supreme Court in Binoy Viswam (2017) on Articles 14 and 19, with the Article 21 (privacy) question left to the Constitution Bench, which subsequently upheld the provision in K.S. Puttaswamy (Aadhaar).
A. SECTION COMMENTARY
Section 139AA requires every person eligible to obtain an Aadhaar number to quote it in the PAN application and in the return of income, and every existing PAN-holder to intimate Aadhaar by the notified date, on pain of the PAN being made inoperative. The provision was the legislative response to the problem of multiple/duplicate PANs and was designed to de-duplicate the taxpayer base using Aadhaar's biometric uniqueness.
Its validity was tested immediately on insertion. The Supreme Court's two-stage treatment — first in Binoy Viswam (2017) on the equality and trade-freedom grounds, and then through the Constitution Bench in the Aadhaar judgment (Puttaswamy, 2018) on privacy — settles that the mandatory linkage of Aadhaar with PAN for income-tax purposes is constitutionally valid, subject to the reading-down of retrospective invalidation of PANs.
B. STATUTORY POSITION (verbatim text)
Reproduced from the local Act (base text to the Finance Act, 2025), including the second proviso and sub-section (2A) inserted by the Finance Act, 2024.
139AA. (1) Every person who is eligible to obtain Aadhaar number shall, on or after the 1st day of July, 2017, quote Aadhaar number—
(i) in the application form for allotment of permanent account number;
(ii) in the return of income:
Provided that where the person does not possess the Aadhaar Number, the Enrolment ID of Aadhaar application form issued to him at the time of enrolment shall be quoted in the application for permanent account number or, as the case may be, in the return of income furnished by him: 88-Provided further that nothing in the first proviso shall apply in respect of any application form for allotment of permanent account number or return of income furnished on or after the 1st day of October, 2024.
(2) Every person who has been allotted permanent account number as on the 1st day of July, 2017, and who is eligible to obtain Aadhaar number, shall intimate his Aadhaar number to such authority in such form and manner as may be prescribed, on or before a date to be notified by the Central Government in the Official Gazette:
Provided that in case of failure to intimate the Aadhaar number, the permanent account number allotted to the person shall be made inoperative after the date so notified in such manner as may be prescribed. 88-(2A) Every person who has been allotted permanent account number on the basis of Enrolment ID of Aadhaar application form filed prior to the 1st day of October, 2024, shall intimate his Aadhaar number to such authority in such form and manner, as may be prescribed, on or before a date to be notified by the Central Government in the Official Gazette.
(3) The provisions of this section shall not apply to such person or class or classes of persons or any State or part of any State, as may be notified by the Central Government in this behalf, in the Official Gazette.
Explanation.—For the purposes of this section, the expressions—
(i) "Aadhaar number", "Enrolment" and "resident" shall have the same meanings respectively assigned to them in clauses (a), (m) and (v) of section 2 of the Aadhaar (Targeted Delivery of Financial and other Subsidies, Benefits and Services) Act, 2016 (18 of 2016);
(ii) "Enrolment ID" means a 28 digit Enrolment Identification Number issued to a resident at the time of enrolment.
C. AUTHORITIES
The authorities are constitutional and binding.
1. Constitutional validity of Aadhaar-PAN linkage
Binoy Viswam v. Union of India (2017) 396 ITR 66 (SC)
Court / Bench: Supreme Court of India (A.K. Sikri and Ashok Bhushan JJ.); judgment dated 9 June 2017.
Issue: Constitutional validity of section 139AA (mandatory quoting of Aadhaar for PAN and returns) under Articles 14, 19(1)(g) and 21.
Held: The Court upheld section 139AA against the challenge under Article 14 (equality) and Article 19(1)(g) (freedom of trade/profession), finding a legitimate State interest in curbing tax evasion, black money and duplicate PANs, and a rational nexus. On Article 21 (informational privacy) the Court declined to decide, that question being before the larger Constitution Bench; pending its decision, the Court partially stayed sub-section (2) so that existing PANs would not be cancelled retrospectively for non-linkage. Sub-section (2) was read down to operate prospectively.
Significance: The foundational decision sustaining the Aadhaar-PAN linkage; it establishes the legislative competence and the equality/trade-freedom validity of section 139AA and the prospective character of PAN invalidation.
Justice K.S. Puttaswamy (Retd.) v. Union of India (2019) 1 SCC 1 (SC) [Aadhaar — Constitution Bench]
Court / Bench: Supreme Court of India, five-Judge Constitution Bench; judgment dated 26 September 2018.
Held: Upholding the Aadhaar Act and the Aadhaar project on the privacy touchstone laid down in the nine-Judge privacy judgment, the Constitution Bench specifically upheld section 139AA of the Income-tax Act — the mandatory linkage of Aadhaar with PAN — as a proportionate measure serving the legitimate State aim of preventing income-tax evasion and de-duplicating PAN, while striking down or reading down other uses of Aadhaar (e.g. section 57).
Significance: Completes the constitutional validation left open in Binoy Viswam: the Aadhaar-PAN linkage in section 139AA survives the proportionality/privacy test. Aadhaar-PAN linkage for income-tax is therefore settled law.
Compiled for the bharattax.co Treatise on the Income-tax Act, 1961 (as amended by the Finance Act, 2026). Statutory text reproduced from the Income-tax Act, 1961 (text as printed in the local Act, base text amended up to the Finance Act, 2025), with the publisher's footnote apparatus and amendment-marker brackets removed; Finance Act, 2026 changes are flagged in the commentary. Citations are stated as reported; orders of the Tribunal, Authority for Advance Rulings and High Courts are flagged as such. Where a section has not been judicially construed, that is stated candidly and the nearest governing authority is given. This material is for professional reference and is not legal advice.