s.100 — GAAR in addition to other provisions, and the power to prescribe guidelines by rule
The provision the Revenue uses to answer the argument that a specific anti-avoidance rule occupies the field, together with the companion section under which the GAAR rules are made.
Sections 100 and 101 of the 1961 Act are merged into a single provision in the Income-tax Act, 2025: section 183, with clause (a) carrying the substance of section 100 and clause (b) that of section 101. On sourcing: CBDT Circular No. 7 of 2017 of 27 January 2017, the sixteen GAAR frequently asked questions, could not be closed against an official machine-readable source, because the Department's own copy is a scanned image with no text layer. The wording in circulation comes from reproductions.
Income-tax Act, 1961
s.100
Income-tax Act, 2025
s.183
In force from 1 April 2026, but s.536(2)(c) preserves the 1961 Act for tax years beginning before that date.
In short
Section 100 of the Income-tax Act, 1961 provides that the Chapter applies in addition to, or in lieu of, any other basis for determination of tax liability. It is short and carries a great deal of weight, because it is the provision, with the non-obstante clause in section 95(1), on which the Revenue resists the argument that where Parliament has enacted a specific anti-avoidance rule for a transaction that rule is exhaustive. In Ayodhya Rami Reddy Alla the Telangana High Court rejected that argument at paragraphs 27 to 35, relying on both provisions. Section 101 is the companion provision and requires the Chapter to be applied in accordance with such guidelines and subject to such conditions as may be prescribed. "Prescribed" means prescribed by rules, and the Department's own footnote to the section points to rules 10U to 10UC and Forms 3CEG to 3CEI. Circular No. 7 of 2017 is therefore not a prescribed guideline under section 101, and its standing is the ordinary standing of a circular: it binds the Department and not the taxpayer or a court. The corresponding provision in the Income-tax Act, 2025 is section 183(a), with section 183(b) carrying section 101.
What the provision does
Puts beyond argument that the Chapter is not a residual code to be reached only when nothing else applies, and allows its consequences either alongside or instead of the ordinary basis of assessment. It does not say when the general rule should be preferred to a specific one, does not require the order to elect between addition and substitution, and, through section 101, supplies a rule-making power but prescribes no content.
Threshold questions
- Whether the specific provision relied on by the taxpayer actually governs the point the Revenue is taking, or only a neighbouring one
- Whether the order applies the Chapter in addition to the ordinary computation or in lieu of it, and whether it says which
- Whether applying both produces double counting of the same amount
- Whether the specific provision relied on was enacted after the Chapter, which is a date the order can be checked against
- Whether the taxpayer's conduct falls inside the specific provision at all, since a rule that does not catch him cannot be said to occupy the field
- Whether the guidance relied on by either side is a rule made under section 101 or a circular, which are not the same thing
In practice
The recurring disputes.
Whether coexistence leaves a specific rule any work to do
The taxpayer's argument is that generalia specialibus non derogant applies, so where Parliament has legislated a precise rule fixing exactly which transactions are caught and from which date, that rule governs the field it covers and a general rule reaching the transactions deliberately left out makes the precise rule pointless; and that section 100 speaks of the basis for determining tax liability, which is a different thing from the order of priority between two anti-avoidance rules directed at the same conduct. The bonus stripping provision is the clearest illustration: Parliament extended it from units to securities only with effect from assessment year 2023-24, which on the taxpayer's case is a considered choice about earlier years. The Revenue's argument is that a specific rule is necessarily under-inclusive, because Parliament can only legislate against the devices it has already seen, and that section 100 and the non-obstante clause exist to stop the edge of a specific rule being read as a licence for everything beyond it; that the maxim giving a special provision priority over a general one has no purchase where the general provision is the later one and carries a non-obstante clause; and that the Chapter's own filters, the monetary floor, the carve-outs and a panel chaired by a judge, are the safeguards Parliament chose in place of immunity. One High Court has taken the Revenue's view, in Ayodhya Rami Reddy Alla (7 June 2024), and leave has been granted against it, the appeal being Civil Appeal No. 9790 of 2024, pending as at October 2026, so it is persuasive rather than settled. What neither the section nor any decision supplies is a way of telling a considered exclusion from the mere limit of what Parliament had in view when it drafted the specific rule.
Addition or substitution, and double counting
Where the Assessing Officer both disallows under a specific provision and recharacterises under the Chapter, the same amount can be taxed twice unless the order is explicit about whether the Chapter is being applied in addition or in lieu. The taxpayer's argument is that the words "in addition to, or in lieu of" put the officer to an election, that an assessment which never says which basis it proceeds on has not made that election and cannot be repaired by arithmetic in appeal, and that the assessee is entitled to know which case he has to meet before he frames his grounds. The Revenue's answer is that the section permits both in terms, that the arithmetic is a matter of computation and not of jurisdiction, and that an order which happens to tax the same sum twice is to be corrected in appeal rather than set aside. Whether an order that never says which basis it proceeds on is defective for that reason alone, or merely open to a computational correction, has not been decided.
What the Board's guidance is worth
Circular No. 7 of 2017 supports coexistence in terms, its first question answering that the general and the specific rules can coexist and are applicable as the facts require. The taxpayer's argument is that a circular binds the Department and not the taxpayer or a court, that it is not a guideline prescribed under section 101, and that an administrative view cannot enlarge a provision Parliament has drafted. The Revenue's argument is that the circular records the Board's considered reading of a Chapter it administers, and that the taxpayer is free to rely on it where it helps him. Which way a court would take it in a contested case has not been tested.
What the Chapter leaves of the pre-GAAR case law
Before Chapter X-A the line between legitimate planning and a device without substance was drawn by the courts, and the leading decisions do not all pull the same way. The taxpayer's argument is that the Chapter is now the complete statutory code for avoidance, that Parliament attached a monetary threshold, carve-outs, grandfathering and a panel chaired by a judge to it, and that the Revenue cannot sidestep those protections by falling back on judicial doctrine for an arrangement the Chapter does not reach. The Revenue's argument is that nothing in the Chapter abrogates the general law, that section 100 says in terms that the Chapter applies in addition to any other basis for determining liability, and that a sham never needed GAAR to be disregarded. Whether an arrangement below the threshold or inside the grandfathering can still be attacked on the older learning is open.